*/
#include "redis.h"
-
-#ifdef HAVE_BACKTRACE
-#include <execinfo.h>
-#include <ucontext.h>
-#endif /* HAVE_BACKTRACE */
+#include "slowlog.h"
+#include "bio.h"
#include <time.h>
#include <signal.h>
#include <limits.h>
#include <float.h>
#include <math.h>
-#include <pthread.h>
+#include <sys/resource.h>
/* Our shared "common" objects */
struct sharedObjectsStruct shared;
-/* Global vars that are actally used as constants. The following double
+/* Global vars that are actually used as constants. The following double
* values are used for double on-disk serialization, and are initialized
* at runtime to avoid strange compiler optimizations. */
/* Global vars */
struct redisServer server; /* server global state */
struct redisCommand *commandTable;
-struct redisCommand readonlyCommandTable[] = {
- {"get",getCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"set",setCommand,3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,0,0,0},
- {"setnx",setnxCommand,3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,0,0,0},
- {"setex",setexCommand,4,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,0,0,0},
- {"append",appendCommand,3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"substr",substrCommand,4,REDIS_CMD_INLINE,NULL,1,1,1},
- {"strlen",strlenCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"del",delCommand,-2,REDIS_CMD_INLINE,NULL,0,0,0},
- {"exists",existsCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"incr",incrCommand,2,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"decr",decrCommand,2,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"mget",mgetCommand,-2,REDIS_CMD_INLINE,NULL,1,-1,1},
- {"rpush",rpushCommand,3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"lpush",lpushCommand,3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"rpushx",rpushxCommand,3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"lpushx",lpushxCommand,3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"linsert",linsertCommand,5,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"rpop",rpopCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"lpop",lpopCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"brpop",brpopCommand,-3,REDIS_CMD_INLINE,NULL,1,1,1},
- {"blpop",blpopCommand,-3,REDIS_CMD_INLINE,NULL,1,1,1},
- {"llen",llenCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"lindex",lindexCommand,3,REDIS_CMD_INLINE,NULL,1,1,1},
- {"lset",lsetCommand,4,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"lrange",lrangeCommand,4,REDIS_CMD_INLINE,NULL,1,1,1},
- {"ltrim",ltrimCommand,4,REDIS_CMD_INLINE,NULL,1,1,1},
- {"lrem",lremCommand,4,REDIS_CMD_BULK,NULL,1,1,1},
- {"rpoplpush",rpoplpushcommand,3,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,NULL,1,2,1},
- {"sadd",saddCommand,3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"srem",sremCommand,3,REDIS_CMD_BULK,NULL,1,1,1},
- {"smove",smoveCommand,4,REDIS_CMD_BULK,NULL,1,2,1},
- {"sismember",sismemberCommand,3,REDIS_CMD_BULK,NULL,1,1,1},
- {"scard",scardCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"spop",spopCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"srandmember",srandmemberCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"sinter",sinterCommand,-2,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,NULL,1,-1,1},
- {"sinterstore",sinterstoreCommand,-3,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,NULL,2,-1,1},
- {"sunion",sunionCommand,-2,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,NULL,1,-1,1},
- {"sunionstore",sunionstoreCommand,-3,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,NULL,2,-1,1},
- {"sdiff",sdiffCommand,-2,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,NULL,1,-1,1},
- {"sdiffstore",sdiffstoreCommand,-3,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,NULL,2,-1,1},
- {"smembers",sinterCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"zadd",zaddCommand,4,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"zincrby",zincrbyCommand,4,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"zrem",zremCommand,3,REDIS_CMD_BULK,NULL,1,1,1},
- {"zremrangebyscore",zremrangebyscoreCommand,4,REDIS_CMD_INLINE,NULL,1,1,1},
- {"zremrangebyrank",zremrangebyrankCommand,4,REDIS_CMD_INLINE,NULL,1,1,1},
- {"zunionstore",zunionstoreCommand,-4,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,zunionInterBlockClientOnSwappedKeys,0,0,0},
- {"zinterstore",zinterstoreCommand,-4,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,zunionInterBlockClientOnSwappedKeys,0,0,0},
- {"zrange",zrangeCommand,-4,REDIS_CMD_INLINE,NULL,1,1,1},
- {"zrangebyscore",zrangebyscoreCommand,-4,REDIS_CMD_INLINE,NULL,1,1,1},
- {"zcount",zcountCommand,4,REDIS_CMD_INLINE,NULL,1,1,1},
- {"zrevrange",zrevrangeCommand,-4,REDIS_CMD_INLINE,NULL,1,1,1},
- {"zcard",zcardCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"zscore",zscoreCommand,3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"zrank",zrankCommand,3,REDIS_CMD_BULK,NULL,1,1,1},
- {"zrevrank",zrevrankCommand,3,REDIS_CMD_BULK,NULL,1,1,1},
- {"hset",hsetCommand,4,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"hsetnx",hsetnxCommand,4,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"hget",hgetCommand,3,REDIS_CMD_BULK,NULL,1,1,1},
- {"hmset",hmsetCommand,-4,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"hmget",hmgetCommand,-3,REDIS_CMD_BULK,NULL,1,1,1},
- {"hincrby",hincrbyCommand,4,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"hdel",hdelCommand,3,REDIS_CMD_BULK,NULL,1,1,1},
- {"hlen",hlenCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"hkeys",hkeysCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"hvals",hvalsCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"hgetall",hgetallCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"hexists",hexistsCommand,3,REDIS_CMD_BULK,NULL,1,1,1},
- {"incrby",incrbyCommand,3,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"decrby",decrbyCommand,3,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"getset",getsetCommand,3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"mset",msetCommand,-3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,-1,2},
- {"msetnx",msetnxCommand,-3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,-1,2},
- {"randomkey",randomkeyCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"select",selectCommand,2,REDIS_CMD_INLINE,NULL,0,0,0},
- {"move",moveCommand,3,REDIS_CMD_INLINE,NULL,1,1,1},
- {"rename",renameCommand,3,REDIS_CMD_INLINE,NULL,1,1,1},
- {"renamenx",renamenxCommand,3,REDIS_CMD_INLINE,NULL,1,1,1},
- {"expire",expireCommand,3,REDIS_CMD_INLINE,NULL,0,0,0},
- {"expireat",expireatCommand,3,REDIS_CMD_INLINE,NULL,0,0,0},
- {"keys",keysCommand,2,REDIS_CMD_INLINE,NULL,0,0,0},
- {"dbsize",dbsizeCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"auth",authCommand,2,REDIS_CMD_INLINE,NULL,0,0,0},
- {"ping",pingCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"echo",echoCommand,2,REDIS_CMD_BULK,NULL,0,0,0},
- {"save",saveCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"bgsave",bgsaveCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"bgrewriteaof",bgrewriteaofCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"shutdown",shutdownCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"lastsave",lastsaveCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"type",typeCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"multi",multiCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"exec",execCommand,1,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,execBlockClientOnSwappedKeys,0,0,0},
- {"discard",discardCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"sync",syncCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"flushdb",flushdbCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"flushall",flushallCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"sort",sortCommand,-2,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"info",infoCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"monitor",monitorCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"ttl",ttlCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"slaveof",slaveofCommand,3,REDIS_CMD_INLINE,NULL,0,0,0},
- {"debug",debugCommand,-2,REDIS_CMD_INLINE,NULL,0,0,0},
- {"config",configCommand,-2,REDIS_CMD_BULK,NULL,0,0,0},
- {"subscribe",subscribeCommand,-2,REDIS_CMD_INLINE,NULL,0,0,0},
- {"unsubscribe",unsubscribeCommand,-1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"psubscribe",psubscribeCommand,-2,REDIS_CMD_INLINE,NULL,0,0,0},
- {"punsubscribe",punsubscribeCommand,-1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"publish",publishCommand,3,REDIS_CMD_BULK|REDIS_CMD_FORCE_REPLICATION,NULL,0,0,0},
- {"watch",watchCommand,-2,REDIS_CMD_INLINE,NULL,0,0,0},
- {"unwatch",unwatchCommand,1,REDIS_CMD_INLINE,NULL,0,0,0}
+
+/* Our command table.
+ *
+ * Every entry is composed of the following fields:
+ *
+ * name: a string representing the command name.
+ * function: pointer to the C function implementing the command.
+ * arity: number of arguments, it is possible to use -N to say >= N
+ * sflags: command flags as string. See below for a table of flags.
+ * flags: flags as bitmask. Computed by Redis using the 'sflags' field.
+ * get_keys_proc: an optional function to get key arguments from a command.
+ * This is only used when the following three fields are not
+ * enough to specify what arguments are keys.
+ * first_key_index: first argument that is a key
+ * last_key_index: last argument that is a key
+ * key_step: step to get all the keys from first to last argument. For instance
+ * in MSET the step is two since arguments are key,val,key,val,...
+ * microseconds: microseconds of total execution time for this command.
+ * calls: total number of calls of this command.
+ *
+ * The flags, microseconds and calls fields are computed by Redis and should
+ * always be set to zero.
+ *
+ * Command flags are expressed using strings where every character represents
+ * a flag. Later the populateCommandTable() function will take care of
+ * populating the real 'flags' field using this characters.
+ *
+ * This is the meaning of the flags:
+ *
+ * w: write command (may modify the key space).
+ * r: read command (will never modify the key space).
+ * m: may increase memory usage once called. Don't allow if out of memory.
+ * a: admin command, like SAVE or SHUTDOWN.
+ * p: Pub/Sub related command.
+ * f: force replication of this command, regarless of server.dirty.
+ * s: command not allowed in scripts.
+ * R: random command. Command is not deterministic, that is, the same command
+ * with the same arguments, with the same key space, may have different
+ * results. For instance SPOP and RANDOMKEY are two random commands. */
+struct redisCommand redisCommandTable[] = {
+ {"get",getCommand,2,"r",0,NULL,1,1,1,0,0},
+ {"set",setCommand,3,"wm",0,noPreloadGetKeys,1,1,1,0,0},
+ {"setnx",setnxCommand,3,"wm",0,noPreloadGetKeys,1,1,1,0,0},
+ {"setex",setexCommand,4,"wm",0,noPreloadGetKeys,1,1,1,0,0},
+ {"psetex",psetexCommand,4,"wm",0,noPreloadGetKeys,1,1,1,0,0},
+ {"append",appendCommand,3,"wm",0,NULL,1,1,1,0,0},
+ {"strlen",strlenCommand,2,"r",0,NULL,1,1,1,0,0},
+ {"del",delCommand,-2,"w",0,noPreloadGetKeys,1,-1,1,0,0},
+ {"exists",existsCommand,2,"r",0,NULL,1,1,1,0,0},
+ {"setbit",setbitCommand,4,"wm",0,NULL,1,1,1,0,0},
+ {"getbit",getbitCommand,3,"r",0,NULL,1,1,1,0,0},
+ {"setrange",setrangeCommand,4,"wm",0,NULL,1,1,1,0,0},
+ {"getrange",getrangeCommand,4,"r",0,NULL,1,1,1,0,0},
+ {"substr",getrangeCommand,4,"r",0,NULL,1,1,1,0,0},
+ {"incr",incrCommand,2,"wm",0,NULL,1,1,1,0,0},
+ {"decr",decrCommand,2,"wm",0,NULL,1,1,1,0,0},
+ {"mget",mgetCommand,-2,"r",0,NULL,1,-1,1,0,0},
+ {"rpush",rpushCommand,-3,"wm",0,NULL,1,1,1,0,0},
+ {"lpush",lpushCommand,-3,"wm",0,NULL,1,1,1,0,0},
+ {"rpushx",rpushxCommand,3,"wm",0,NULL,1,1,1,0,0},
+ {"lpushx",lpushxCommand,3,"wm",0,NULL,1,1,1,0,0},
+ {"linsert",linsertCommand,5,"wm",0,NULL,1,1,1,0,0},
+ {"rpop",rpopCommand,2,"w",0,NULL,1,1,1,0,0},
+ {"lpop",lpopCommand,2,"w",0,NULL,1,1,1,0,0},
+ {"brpop",brpopCommand,-3,"ws",0,NULL,1,1,1,0,0},
+ {"brpoplpush",brpoplpushCommand,4,"wms",0,NULL,1,2,1,0,0},
+ {"blpop",blpopCommand,-3,"ws",0,NULL,1,-2,1,0,0},
+ {"llen",llenCommand,2,"r",0,NULL,1,1,1,0,0},
+ {"lindex",lindexCommand,3,"r",0,NULL,1,1,1,0,0},
+ {"lset",lsetCommand,4,"wm",0,NULL,1,1,1,0,0},
+ {"lrange",lrangeCommand,4,"r",0,NULL,1,1,1,0,0},
+ {"ltrim",ltrimCommand,4,"w",0,NULL,1,1,1,0,0},
+ {"lrem",lremCommand,4,"w",0,NULL,1,1,1,0,0},
+ {"rpoplpush",rpoplpushCommand,3,"wm",0,NULL,1,2,1,0,0},
+ {"sadd",saddCommand,-3,"wm",0,NULL,1,1,1,0,0},
+ {"srem",sremCommand,-3,"w",0,NULL,1,1,1,0,0},
+ {"smove",smoveCommand,4,"w",0,NULL,1,2,1,0,0},
+ {"sismember",sismemberCommand,3,"r",0,NULL,1,1,1,0,0},
+ {"scard",scardCommand,2,"r",0,NULL,1,1,1,0,0},
+ {"spop",spopCommand,2,"wRs",0,NULL,1,1,1,0,0},
+ {"srandmember",srandmemberCommand,2,"rR",0,NULL,1,1,1,0,0},
+ {"sinter",sinterCommand,-2,"r",0,NULL,1,-1,1,0,0},
+ {"sinterstore",sinterstoreCommand,-3,"wm",0,NULL,1,-1,1,0,0},
+ {"sunion",sunionCommand,-2,"r",0,NULL,1,-1,1,0,0},
+ {"sunionstore",sunionstoreCommand,-3,"wm",0,NULL,1,-1,1,0,0},
+ {"sdiff",sdiffCommand,-2,"r",0,NULL,1,-1,1,0,0},
+ {"sdiffstore",sdiffstoreCommand,-3,"wm",0,NULL,1,-1,1,0,0},
+ {"smembers",sinterCommand,2,"r",0,NULL,1,1,1,0,0},
+ {"zadd",zaddCommand,-4,"wm",0,NULL,1,1,1,0,0},
+ {"zincrby",zincrbyCommand,4,"wm",0,NULL,1,1,1,0,0},
+ {"zrem",zremCommand,-3,"w",0,NULL,1,1,1,0,0},
+ {"zremrangebyscore",zremrangebyscoreCommand,4,"w",0,NULL,1,1,1,0,0},
+ {"zremrangebyrank",zremrangebyrankCommand,4,"w",0,NULL,1,1,1,0,0},
+ {"zunionstore",zunionstoreCommand,-4,"wm",0,zunionInterGetKeys,0,0,0,0,0},
+ {"zinterstore",zinterstoreCommand,-4,"wm",0,zunionInterGetKeys,0,0,0,0,0},
+ {"zrange",zrangeCommand,-4,"r",0,NULL,1,1,1,0,0},
+ {"zrangebyscore",zrangebyscoreCommand,-4,"r",0,NULL,1,1,1,0,0},
+ {"zrevrangebyscore",zrevrangebyscoreCommand,-4,"r",0,NULL,1,1,1,0,0},
+ {"zcount",zcountCommand,4,"r",0,NULL,1,1,1,0,0},
+ {"zrevrange",zrevrangeCommand,-4,"r",0,NULL,1,1,1,0,0},
+ {"zcard",zcardCommand,2,"r",0,NULL,1,1,1,0,0},
+ {"zscore",zscoreCommand,3,"r",0,NULL,1,1,1,0,0},
+ {"zrank",zrankCommand,3,"r",0,NULL,1,1,1,0,0},
+ {"zrevrank",zrevrankCommand,3,"r",0,NULL,1,1,1,0,0},
+ {"hset",hsetCommand,4,"wm",0,NULL,1,1,1,0,0},
+ {"hsetnx",hsetnxCommand,4,"wm",0,NULL,1,1,1,0,0},
+ {"hget",hgetCommand,3,"r",0,NULL,1,1,1,0,0},
+ {"hmset",hmsetCommand,-4,"wm",0,NULL,1,1,1,0,0},
+ {"hmget",hmgetCommand,-3,"r",0,NULL,1,1,1,0,0},
+ {"hincrby",hincrbyCommand,4,"wm",0,NULL,1,1,1,0,0},
+ {"hincrbyfloat",hincrbyfloatCommand,4,"wm",0,NULL,1,1,1,0,0},
+ {"hdel",hdelCommand,-3,"w",0,NULL,1,1,1,0,0},
+ {"hlen",hlenCommand,2,"r",0,NULL,1,1,1,0,0},
+ {"hkeys",hkeysCommand,2,"r",0,NULL,1,1,1,0,0},
+ {"hvals",hvalsCommand,2,"r",0,NULL,1,1,1,0,0},
+ {"hgetall",hgetallCommand,2,"r",0,NULL,1,1,1,0,0},
+ {"hexists",hexistsCommand,3,"r",0,NULL,1,1,1,0,0},
+ {"incrby",incrbyCommand,3,"wm",0,NULL,1,1,1,0,0},
+ {"decrby",decrbyCommand,3,"wm",0,NULL,1,1,1,0,0},
+ {"incrbyfloat",incrbyfloatCommand,3,"wm",0,NULL,1,1,1,0,0},
+ {"getset",getsetCommand,3,"wm",0,NULL,1,1,1,0,0},
+ {"mset",msetCommand,-3,"wm",0,NULL,1,-1,2,0,0},
+ {"msetnx",msetnxCommand,-3,"wm",0,NULL,1,-1,2,0,0},
+ {"randomkey",randomkeyCommand,1,"rR",0,NULL,0,0,0,0,0},
+ {"select",selectCommand,2,"r",0,NULL,0,0,0,0,0},
+ {"move",moveCommand,3,"w",0,NULL,1,1,1,0,0},
+ {"rename",renameCommand,3,"w",0,renameGetKeys,1,2,1,0,0},
+ {"renamenx",renamenxCommand,3,"w",0,renameGetKeys,1,2,1,0,0},
+ {"expire",expireCommand,3,"w",0,NULL,1,1,1,0,0},
+ {"expireat",expireatCommand,3,"w",0,NULL,1,1,1,0,0},
+ {"pexpire",pexpireCommand,3,"w",0,NULL,1,1,1,0,0},
+ {"pexpireat",pexpireatCommand,3,"w",0,NULL,1,1,1,0,0},
+ {"keys",keysCommand,2,"r",0,NULL,0,0,0,0,0},
+ {"dbsize",dbsizeCommand,1,"r",0,NULL,0,0,0,0,0},
+ {"auth",authCommand,2,"rs",0,NULL,0,0,0,0,0},
+ {"ping",pingCommand,1,"r",0,NULL,0,0,0,0,0},
+ {"echo",echoCommand,2,"r",0,NULL,0,0,0,0,0},
+ {"save",saveCommand,1,"ars",0,NULL,0,0,0,0,0},
+ {"bgsave",bgsaveCommand,1,"ar",0,NULL,0,0,0,0,0},
+ {"bgrewriteaof",bgrewriteaofCommand,1,"ar",0,NULL,0,0,0,0,0},
+ {"shutdown",shutdownCommand,-1,"ar",0,NULL,0,0,0,0,0},
+ {"lastsave",lastsaveCommand,1,"r",0,NULL,0,0,0,0,0},
+ {"type",typeCommand,2,"r",0,NULL,1,1,1,0,0},
+ {"multi",multiCommand,1,"rs",0,NULL,0,0,0,0,0},
+ {"exec",execCommand,1,"wms",0,NULL,0,0,0,0,0},
+ {"discard",discardCommand,1,"rs",0,NULL,0,0,0,0,0},
+ {"sync",syncCommand,1,"ars",0,NULL,0,0,0,0,0},
+ {"flushdb",flushdbCommand,1,"w",0,NULL,0,0,0,0,0},
+ {"flushall",flushallCommand,1,"w",0,NULL,0,0,0,0,0},
+ {"sort",sortCommand,-2,"wm",0,NULL,1,1,1,0,0},
+ {"info",infoCommand,-1,"r",0,NULL,0,0,0,0,0},
+ {"monitor",monitorCommand,1,"ars",0,NULL,0,0,0,0,0},
+ {"ttl",ttlCommand,2,"r",0,NULL,1,1,1,0,0},
+ {"pttl",pttlCommand,2,"r",0,NULL,1,1,1,0,0},
+ {"persist",persistCommand,2,"w",0,NULL,1,1,1,0,0},
+ {"slaveof",slaveofCommand,3,"aws",0,NULL,0,0,0,0,0},
+ {"debug",debugCommand,-2,"aws",0,NULL,0,0,0,0,0},
+ {"config",configCommand,-2,"ar",0,NULL,0,0,0,0,0},
+ {"subscribe",subscribeCommand,-2,"rps",0,NULL,0,0,0,0,0},
+ {"unsubscribe",unsubscribeCommand,-1,"rps",0,NULL,0,0,0,0,0},
+ {"psubscribe",psubscribeCommand,-2,"rps",0,NULL,0,0,0,0,0},
+ {"punsubscribe",punsubscribeCommand,-1,"rps",0,NULL,0,0,0,0,0},
+ {"publish",publishCommand,3,"rpf",0,NULL,0,0,0,0,0},
+ {"watch",watchCommand,-2,"rs",0,noPreloadGetKeys,1,-1,1,0,0},
+ {"unwatch",unwatchCommand,1,"rs",0,NULL,0,0,0,0,0},
+ {"cluster",clusterCommand,-2,"ar",0,NULL,0,0,0,0,0},
+ {"restore",restoreCommand,4,"awm",0,NULL,1,1,1,0,0},
+ {"migrate",migrateCommand,6,"aw",0,NULL,0,0,0,0,0},
+ {"asking",askingCommand,1,"r",0,NULL,0,0,0,0,0},
+ {"dump",dumpCommand,2,"ar",0,NULL,1,1,1,0,0},
+ {"object",objectCommand,-2,"r",0,NULL,2,2,2,0,0},
+ {"client",clientCommand,-2,"ar",0,NULL,0,0,0,0,0},
+ {"eval",evalCommand,-3,"wms",0,zunionInterGetKeys,0,0,0,0,0},
+ {"evalsha",evalShaCommand,-3,"wms",0,zunionInterGetKeys,0,0,0,0,0},
+ {"slowlog",slowlogCommand,-2,"r",0,NULL,0,0,0,0,0},
+ {"script",scriptCommand,-2,"ras",0,NULL,0,0,0,0,0}
};
/*============================ Utility functions ============================ */
-void redisLog(int level, const char *fmt, ...) {
- va_list ap;
+/* Low level logging. To use only for very big messages, otherwise
+ * redisLog() is to prefer. */
+void redisLogRaw(int level, const char *msg) {
+ const int syslogLevelMap[] = { LOG_DEBUG, LOG_INFO, LOG_NOTICE, LOG_WARNING };
+ const char *c = ".-*#";
+ time_t now = time(NULL);
FILE *fp;
- char *c = ".-*#";
char buf[64];
- time_t now;
+ int rawmode = (level & REDIS_LOG_RAW);
+ level &= 0xff; /* clear flags */
if (level < server.verbosity) return;
fp = (server.logfile == NULL) ? stdout : fopen(server.logfile,"a");
if (!fp) return;
- va_start(ap, fmt);
- now = time(NULL);
- strftime(buf,64,"%d %b %H:%M:%S",localtime(&now));
- fprintf(fp,"[%d] %s %c ",(int)getpid(),buf,c[level]);
- vfprintf(fp, fmt, ap);
- fprintf(fp,"\n");
+ if (rawmode) {
+ fprintf(fp,"%s",msg);
+ } else {
+ strftime(buf,sizeof(buf),"%d %b %H:%M:%S",localtime(&now));
+ fprintf(fp,"[%d] %s %c %s\n",(int)getpid(),buf,c[level],msg);
+ }
fflush(fp);
- va_end(ap);
if (server.logfile) fclose(fp);
+
+ if (server.syslog_enabled) syslog(syslogLevelMap[level], "%s", msg);
+}
+
+/* Like redisLogRaw() but with printf-alike support. This is the funciton that
+ * is used across the code. The raw version is only used in order to dump
+ * the INFO output on crash. */
+void redisLog(int level, const char *fmt, ...) {
+ va_list ap;
+ char msg[REDIS_MAX_LOGMSG_LEN];
+
+ if ((level&0xff) < server.verbosity) return;
+
+ va_start(ap, fmt);
+ vsnprintf(msg, sizeof(msg), fmt, ap);
+ va_end(ap);
+
+ redisLogRaw(level,msg);
}
/* Redis generally does not try to recover from out of memory conditions
abort();
}
+/* Return the UNIX time in microseconds */
+long long ustime(void) {
+ struct timeval tv;
+ long long ust;
+
+ gettimeofday(&tv, NULL);
+ ust = ((long long)tv.tv_sec)*1000000;
+ ust += tv.tv_usec;
+ return ust;
+}
+
+/* Return the UNIX time in milliseconds */
+long long mstime(void) {
+ return ustime()/1000;
+}
+
/*====================== Hash table type implementation ==================== */
/* This is an hash table type that uses the SDS dynamic strings libary as
return memcmp(key1, key2, l1) == 0;
}
+/* A case insensitive version used for the command lookup table. */
+int dictSdsKeyCaseCompare(void *privdata, const void *key1,
+ const void *key2)
+{
+ DICT_NOTUSED(privdata);
+
+ return strcasecmp(key1, key2) == 0;
+}
+
void dictRedisObjectDestructor(void *privdata, void *val)
{
DICT_NOTUSED(privdata);
return dictGenHashFunction((unsigned char*)key, sdslen((char*)key));
}
+unsigned int dictSdsCaseHash(const void *key) {
+ return dictGenCaseHashFunction((unsigned char*)key, sdslen((char*)key));
+}
+
int dictEncObjKeyCompare(void *privdata, const void *key1,
const void *key2)
{
}
}
-/* Sets type */
+/* Sets type hash table */
dictType setDictType = {
dictEncObjHash, /* hash function */
NULL, /* key dup */
NULL /* val destructor */
};
+/* Command table. sds string -> command struct pointer. */
+dictType commandTableDictType = {
+ dictSdsCaseHash, /* hash function */
+ NULL, /* key dup */
+ NULL, /* val dup */
+ dictSdsKeyCaseCompare, /* key compare */
+ dictSdsDestructor, /* key destructor */
+ NULL /* val destructor */
+};
+
/* Hash type hash table (note that small hashes are represented with zimpaps) */
dictType hashDictType = {
dictEncObjHash, /* hash function */
dictListDestructor /* val destructor */
};
+/* Cluster nodes hash table, mapping nodes addresses 1.2.3.4:6379 to
+ * clusterNode structures. */
+dictType clusterNodesDictType = {
+ dictSdsHash, /* hash function */
+ NULL, /* key dup */
+ NULL, /* val dup */
+ dictSdsKeyCompare, /* key compare */
+ dictSdsDestructor, /* key destructor */
+ NULL /* val destructor */
+};
+
int htNeedsResize(dict *dict) {
long long size, used;
* for dict.c to resize the hash tables accordingly to the fact we have o not
* running childs. */
void updateDictResizePolicy(void) {
- if (server.bgsavechildpid == -1 && server.bgrewritechildpid == -1)
+ if (server.rdb_child_pid == -1 && server.aof_child_pid == -1)
dictEnableResize();
else
dictDisableResize();
/* ======================= Cron: called every 100 ms ======================== */
+/* Try to expire a few timed out keys. The algorithm used is adaptive and
+ * will use few CPU cycles if there are few expiring keys, otherwise
+ * it will get more aggressive to avoid that too much memory is used by
+ * keys that can be removed from the keyspace. */
+void activeExpireCycle(void) {
+ int j;
+
+ for (j = 0; j < server.dbnum; j++) {
+ int expired;
+ redisDb *db = server.db+j;
+
+ /* Continue to expire if at the end of the cycle more than 25%
+ * of the keys were expired. */
+ do {
+ long num = dictSize(db->expires);
+ long long now = mstime();
+
+ expired = 0;
+ if (num > REDIS_EXPIRELOOKUPS_PER_CRON)
+ num = REDIS_EXPIRELOOKUPS_PER_CRON;
+ while (num--) {
+ dictEntry *de;
+ long long t;
+
+ if ((de = dictGetRandomKey(db->expires)) == NULL) break;
+ t = dictGetSignedIntegerVal(de);
+ if (now > t) {
+ sds key = dictGetKey(de);
+ robj *keyobj = createStringObject(key,sdslen(key));
+
+ propagateExpire(db,keyobj);
+ dbDelete(db,keyobj);
+ decrRefCount(keyobj);
+ expired++;
+ server.stat_expiredkeys++;
+ }
+ }
+ } while (expired > REDIS_EXPIRELOOKUPS_PER_CRON/4);
+ }
+}
+
+void updateLRUClock(void) {
+ server.lruclock = (time(NULL)/REDIS_LRU_CLOCK_RESOLUTION) &
+ REDIS_LRU_CLOCK_MAX;
+}
+
int serverCron(struct aeEventLoop *eventLoop, long long id, void *clientData) {
- int j, loops = server.cronloops++;
+ int j, loops = server.cronloops;
REDIS_NOTUSED(eventLoop);
REDIS_NOTUSED(id);
REDIS_NOTUSED(clientData);
* in objects at every object access, and accuracy is not needed.
* To access a global var is faster than calling time(NULL) */
server.unixtime = time(NULL);
- /* We have just 21 bits per object for LRU information.
- * So we use an (eventually wrapping) LRU clock with minutes resolution.
+
+ /* We have just 22 bits per object for LRU information.
+ * So we use an (eventually wrapping) LRU clock with 10 seconds resolution.
+ * 2^22 bits with 10 seconds resoluton is more or less 1.5 years.
*
- * When we need to select what object to swap, we compute the minimum
- * time distance between the current lruclock and the object last access
- * lruclock info. Even if clocks will wrap on overflow, there is
- * the interesting property that we are sure that at least
- * ABS(A-B) minutes passed between current time and timestamp B.
+ * Note that even if this will wrap after 1.5 years it's not a problem,
+ * everything will still work but just some object will appear younger
+ * to Redis. But for this to happen a given object should never be touched
+ * for 1.5 years.
*
- * This is not precise but we don't need at all precision, but just
- * something statistically reasonable.
+ * Note that you can change the resolution altering the
+ * REDIS_LRU_CLOCK_RESOLUTION define.
*/
- server.lruclock = (time(NULL)/60)&((1<<21)-1);
+ updateLRUClock();
+
+ /* Record the max memory used since the server was started. */
+ if (zmalloc_used_memory() > server.stat_peak_memory)
+ server.stat_peak_memory = zmalloc_used_memory();
/* We received a SIGTERM, shutting down here in a safe way, as it is
* not ok doing so inside the signal handler. */
if (server.shutdown_asap) {
- if (prepareForShutdown() == REDIS_OK) exit(0);
+ if (prepareForShutdown(0) == REDIS_OK) exit(0);
redisLog(REDIS_WARNING,"SIGTERM received but errors trying to shut down the server, check the logs for more information");
}
* if we resize the HT while there is the saving child at work actually
* a lot of memory movements in the parent will cause a lot of pages
* copied. */
- if (server.bgsavechildpid == -1 && server.bgrewritechildpid == -1) {
+ if (server.rdb_child_pid == -1 && server.aof_child_pid == -1) {
if (!(loops % 10)) tryResizeHashTables();
if (server.activerehashing) incrementallyRehash();
}
}
/* Close connections of timedout clients */
- if ((server.maxidletime && !(loops % 100)) || server.blpop_blocked_clients)
+ if ((server.maxidletime && !(loops % 100)) || server.bpop_blocked_clients)
closeTimedoutClients();
- /* Check if a background saving or AOF rewrite in progress terminated */
- if (server.bgsavechildpid != -1 || server.bgrewritechildpid != -1) {
+ /* Start a scheduled AOF rewrite if this was requested by the user while
+ * a BGSAVE was in progress. */
+ if (server.rdb_child_pid == -1 && server.aof_child_pid == -1 &&
+ server.aof_rewrite_scheduled)
+ {
+ rewriteAppendOnlyFileBackground();
+ }
+
+ /* Check if a background saving or AOF rewrite in progress terminated. */
+ if (server.rdb_child_pid != -1 || server.aof_child_pid != -1) {
int statloc;
pid_t pid;
if ((pid = wait3(&statloc,WNOHANG,NULL)) != 0) {
- if (pid == server.bgsavechildpid) {
- backgroundSaveDoneHandler(statloc);
+ int exitcode = WEXITSTATUS(statloc);
+ int bysignal = 0;
+
+ if (WIFSIGNALED(statloc)) bysignal = WTERMSIG(statloc);
+
+ if (pid == server.rdb_child_pid) {
+ backgroundSaveDoneHandler(exitcode,bysignal);
} else {
- backgroundRewriteDoneHandler(statloc);
+ backgroundRewriteDoneHandler(exitcode,bysignal);
}
updateDictResizePolicy();
}
} else {
- /* If there is not a background saving in progress check if
- * we have to save now */
time_t now = time(NULL);
+
+ /* If there is not a background saving/rewrite in progress check if
+ * we have to save/rewrite now */
for (j = 0; j < server.saveparamslen; j++) {
struct saveparam *sp = server.saveparams+j;
now-server.lastsave > sp->seconds) {
redisLog(REDIS_NOTICE,"%d changes in %d seconds. Saving...",
sp->changes, sp->seconds);
- rdbSaveBackground(server.dbfilename);
+ rdbSaveBackground(server.rdb_filename);
break;
}
}
+
+ /* Trigger an AOF rewrite if needed */
+ if (server.rdb_child_pid == -1 &&
+ server.aof_child_pid == -1 &&
+ server.aof_rewrite_perc &&
+ server.aof_current_size > server.aof_rewrite_min_size)
+ {
+ long long base = server.aof_rewrite_base_size ?
+ server.aof_rewrite_base_size : 1;
+ long long growth = (server.aof_current_size*100/base) - 100;
+ if (growth >= server.aof_rewrite_perc) {
+ redisLog(REDIS_NOTICE,"Starting automatic rewriting of AOF on %lld%% growth",growth);
+ rewriteAppendOnlyFileBackground();
+ }
+ }
}
- /* Try to expire a few timed out keys. The algorithm used is adaptive and
- * will use few CPU cycles if there are few expiring keys, otherwise
- * it will get more aggressive to avoid that too much memory is used by
- * keys that can be removed from the keyspace. */
- for (j = 0; j < server.dbnum; j++) {
- int expired;
- redisDb *db = server.db+j;
- /* Continue to expire if at the end of the cycle more than 25%
- * of the keys were expired. */
- do {
- long num = dictSize(db->expires);
- time_t now = time(NULL);
+ /* If we postponed an AOF buffer flush, let's try to do it every time the
+ * cron function is called. */
+ if (server.aof_flush_postponed_start) flushAppendOnlyFile(0);
- expired = 0;
- if (num > REDIS_EXPIRELOOKUPS_PER_CRON)
- num = REDIS_EXPIRELOOKUPS_PER_CRON;
- while (num--) {
- dictEntry *de;
- time_t t;
+ /* Expire a few keys per cycle, only if this is a master.
+ * On slaves we wait for DEL operations synthesized by the master
+ * in order to guarantee a strict consistency. */
+ if (server.masterhost == NULL) activeExpireCycle();
- if ((de = dictGetRandomKey(db->expires)) == NULL) break;
- t = (time_t) dictGetEntryVal(de);
- if (now > t) {
- sds key = dictGetEntryKey(de);
- robj *keyobj = createStringObject(key,sdslen(key));
-
- dbDelete(db,keyobj);
- decrRefCount(keyobj);
- expired++;
- server.stat_expiredkeys++;
- }
- }
- } while (expired > REDIS_EXPIRELOOKUPS_PER_CRON/4);
- }
+ /* Replication cron function -- used to reconnect to master and
+ * to detect transfer failures. */
+ if (!(loops % 10)) replicationCron();
- /* Swap a few keys on disk if we are over the memory limit and VM
- * is enbled. Try to free objects from the free list first. */
- if (vmCanSwapOut()) {
- while (server.vm_enabled && zmalloc_used_memory() >
- server.vm_max_memory)
- {
- int retval;
-
- if (tryFreeOneObjectFromFreelist() == REDIS_OK) continue;
- retval = (server.vm_max_threads == 0) ?
- vmSwapOneObjectBlocking() :
- vmSwapOneObjectThreaded();
- if (retval == REDIS_ERR && !(loops % 300) &&
- zmalloc_used_memory() >
- (server.vm_max_memory+server.vm_max_memory/10))
- {
- redisLog(REDIS_WARNING,"WARNING: vm-max-memory limit exceeded by more than 10%% but unable to swap more objects out!");
- }
- /* Note that when using threade I/O we free just one object,
- * because anyway when the I/O thread in charge to swap this
- * object out will finish, the handler of completed jobs
- * will try to swap more objects if we are still out of memory. */
- if (retval == REDIS_ERR || server.vm_max_threads > 0) break;
- }
- }
+ /* Run other sub-systems specific cron jobs */
+ if (server.cluster_enabled && !(loops % 10)) clusterCron();
- /* Check if we should connect to a MASTER */
- if (server.replstate == REDIS_REPL_CONNECT && !(loops % 10)) {
- redisLog(REDIS_NOTICE,"Connecting to MASTER...");
- if (syncWithMaster() == REDIS_OK) {
- redisLog(REDIS_NOTICE,"MASTER <-> SLAVE sync succeeded");
- if (server.appendonly) rewriteAppendOnlyFileBackground();
- }
- }
+ server.cronloops++;
return 100;
}
* for ready file descriptors. */
void beforeSleep(struct aeEventLoop *eventLoop) {
REDIS_NOTUSED(eventLoop);
-
- /* Awake clients that got all the swapped keys they requested */
- if (server.vm_enabled && listLength(server.io_ready_clients)) {
- listIter li;
- listNode *ln;
-
- listRewind(server.io_ready_clients,&li);
- while((ln = listNext(&li))) {
- redisClient *c = ln->value;
- struct redisCommand *cmd;
-
- /* Resume the client. */
- listDelNode(server.io_ready_clients,ln);
- c->flags &= (~REDIS_IO_WAIT);
- server.vm_blocked_clients--;
- aeCreateFileEvent(server.el, c->fd, AE_READABLE,
- readQueryFromClient, c);
- cmd = lookupCommand(c->argv[0]->ptr);
- redisAssert(cmd != NULL);
- call(c,cmd);
- resetClient(c);
- /* There may be more data to process in the input buffer. */
- if (c->querybuf && sdslen(c->querybuf) > 0)
- processInputBuffer(c);
+ listNode *ln;
+ redisClient *c;
+
+ /* Try to process pending commands for clients that were just unblocked. */
+ while (listLength(server.unblocked_clients)) {
+ ln = listFirst(server.unblocked_clients);
+ redisAssert(ln != NULL);
+ c = ln->value;
+ listDelNode(server.unblocked_clients,ln);
+ c->flags &= ~REDIS_UNBLOCKED;
+
+ /* Process remaining data in the input buffer. */
+ if (c->querybuf && sdslen(c->querybuf) > 0) {
+ server.current_client = c;
+ processInputBuffer(c);
+ server.current_client = NULL;
}
}
+
/* Write the AOF buffer on disk */
- flushAppendOnlyFile();
+ flushAppendOnlyFile(0);
}
/* =========================== Server initialization ======================== */
"-ERR source and destination objects are the same\r\n"));
shared.outofrangeerr = createObject(REDIS_STRING,sdsnew(
"-ERR index out of range\r\n"));
+ shared.noscripterr = createObject(REDIS_STRING,sdsnew(
+ "-NOSCRIPT No matching script. Please use EVAL.\r\n"));
+ shared.loadingerr = createObject(REDIS_STRING,sdsnew(
+ "-LOADING Redis is loading the dataset in memory\r\n"));
+ shared.slowscripterr = createObject(REDIS_STRING,sdsnew(
+ "-BUSY Redis is busy running a script. You can only call SCRIPT KILL or SHUTDOWN NOSAVE.\r\n"));
shared.space = createObject(REDIS_STRING,sdsnew(" "));
shared.colon = createObject(REDIS_STRING,sdsnew(":"));
shared.plus = createObject(REDIS_STRING,sdsnew("+"));
}
void initServerConfig() {
- server.dbnum = REDIS_DEFAULT_DBNUM;
server.port = REDIS_SERVERPORT;
- server.verbosity = REDIS_VERBOSE;
+ server.bindaddr = NULL;
+ server.unixsocket = NULL;
+ server.unixsocketperm = 0;
+ server.ipfd = -1;
+ server.sofd = -1;
+ server.dbnum = REDIS_DEFAULT_DBNUM;
+ server.verbosity = REDIS_NOTICE;
server.maxidletime = REDIS_MAXIDLETIME;
+ server.client_max_querybuf_len = REDIS_MAX_QUERYBUF_LEN;
server.saveparams = NULL;
+ server.loading = 0;
server.logfile = NULL; /* NULL = log on standard output */
- server.bindaddr = NULL;
- server.glueoutputbuf = 1;
+ server.syslog_enabled = 0;
+ server.syslog_ident = zstrdup("redis");
+ server.syslog_facility = LOG_LOCAL0;
server.daemonize = 0;
- server.appendonly = 0;
- server.appendfsync = APPENDFSYNC_EVERYSEC;
- server.no_appendfsync_on_rewrite = 0;
- server.lastfsync = time(NULL);
- server.appendfd = -1;
- server.appendseldb = -1; /* Make sure the first time will not match */
+ server.aof_state = REDIS_AOF_OFF;
+ server.aof_fsync = AOF_FSYNC_EVERYSEC;
+ server.aof_no_fsync_on_rewrite = 0;
+ server.aof_rewrite_perc = REDIS_AOF_REWRITE_PERC;
+ server.aof_rewrite_min_size = REDIS_AOF_REWRITE_MIN_SIZE;
+ server.aof_rewrite_base_size = 0;
+ server.aof_rewrite_scheduled = 0;
+ server.aof_last_fsync = time(NULL);
+ server.aof_fd = -1;
+ server.aof_selected_db = -1; /* Make sure the first time will not match */
+ server.aof_flush_postponed_start = 0;
server.pidfile = zstrdup("/var/run/redis.pid");
- server.dbfilename = zstrdup("dump.rdb");
- server.appendfilename = zstrdup("appendonly.aof");
+ server.rdb_filename = zstrdup("dump.rdb");
+ server.aof_filename = zstrdup("appendonly.aof");
server.requirepass = NULL;
- server.rdbcompression = 1;
+ server.rdb_compression = 1;
server.activerehashing = 1;
- server.maxclients = 0;
- server.blpop_blocked_clients = 0;
+ server.maxclients = REDIS_MAX_CLIENTS;
+ server.bpop_blocked_clients = 0;
server.maxmemory = 0;
- server.vm_enabled = 0;
- server.vm_swap_file = zstrdup("/tmp/redis-%p.vm");
- server.vm_page_size = 256; /* 256 bytes per page */
- server.vm_pages = 1024*1024*100; /* 104 millions of pages */
- server.vm_max_memory = 1024LL*1024*1024*1; /* 1 GB of RAM */
- server.vm_max_threads = 4;
- server.vm_blocked_clients = 0;
+ server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_LRU;
+ server.maxmemory_samples = 3;
server.hash_max_zipmap_entries = REDIS_HASH_MAX_ZIPMAP_ENTRIES;
server.hash_max_zipmap_value = REDIS_HASH_MAX_ZIPMAP_VALUE;
server.list_max_ziplist_entries = REDIS_LIST_MAX_ZIPLIST_ENTRIES;
server.list_max_ziplist_value = REDIS_LIST_MAX_ZIPLIST_VALUE;
+ server.set_max_intset_entries = REDIS_SET_MAX_INTSET_ENTRIES;
+ server.zset_max_ziplist_entries = REDIS_ZSET_MAX_ZIPLIST_ENTRIES;
+ server.zset_max_ziplist_value = REDIS_ZSET_MAX_ZIPLIST_VALUE;
server.shutdown_asap = 0;
-
+ server.repl_ping_slave_period = REDIS_REPL_PING_SLAVE_PERIOD;
+ server.repl_timeout = REDIS_REPL_TIMEOUT;
+ server.cluster_enabled = 0;
+ server.cluster.configfile = zstrdup("nodes.conf");
+ server.lua_caller = NULL;
+ server.lua_time_limit = REDIS_LUA_TIME_LIMIT;
+ server.lua_client = NULL;
+ server.lua_timedout = 0;
+
+ updateLRUClock();
resetServerSaveParams();
appendServerSaveParams(60*60,1); /* save after 1 hour and 1 change */
appendServerSaveParams(300,100); /* save after 5 minutes and 100 changes */
appendServerSaveParams(60,10000); /* save after 1 minute and 10000 changes */
/* Replication related */
- server.isslave = 0;
server.masterauth = NULL;
server.masterhost = NULL;
server.masterport = 6379;
server.master = NULL;
- server.replstate = REDIS_REPL_NONE;
+ server.repl_state = REDIS_REPL_NONE;
+ server.repl_syncio_timeout = REDIS_REPL_SYNCIO_TIMEOUT;
+ server.repl_serve_stale_data = 1;
+ server.repl_down_since = -1;
/* Double constants initialization */
R_Zero = 0.0;
R_PosInf = 1.0/R_Zero;
R_NegInf = -1.0/R_Zero;
R_Nan = R_Zero/R_Zero;
+
+ /* Command table -- we intiialize it here as it is part of the
+ * initial configuration, since command names may be changed via
+ * redis.conf using the rename-command directive. */
+ server.commands = dictCreate(&commandTableDictType,NULL);
+ populateCommandTable();
+ server.delCommand = lookupCommandByCString("del");
+ server.multiCommand = lookupCommandByCString("multi");
+
+ /* Slow log */
+ server.slowlog_log_slower_than = REDIS_SLOWLOG_LOG_SLOWER_THAN;
+ server.slowlog_max_len = REDIS_SLOWLOG_MAX_LEN;
+
+ /* Assert */
+ server.assert_failed = "<no assertion failed>";
+ server.assert_file = "<no file>";
+ server.assert_line = 0;
+ server.bug_report_start = 0;
+}
+
+/* This function will try to raise the max number of open files accordingly to
+ * the configured max number of clients. It will also account for 32 additional
+ * file descriptors as we need a few more for persistence, listening
+ * sockets, log files and so forth.
+ *
+ * If it will not be possible to set the limit accordingly to the configured
+ * max number of clients, the function will do the reverse setting
+ * server.maxclients to the value that we can actually handle. */
+void adjustOpenFilesLimit(void) {
+ rlim_t maxfiles = server.maxclients+32;
+ struct rlimit limit;
+
+ if (maxfiles < 1024) maxfiles = 1024;
+ if (getrlimit(RLIMIT_NOFILE,&limit) == -1) {
+ redisLog(REDIS_WARNING,"Unable to obtain the current NOFILE limit (%s), assuming 1024 and setting the max clients configuration accordingly.",
+ strerror(errno));
+ server.maxclients = 1024-32;
+ } else {
+ rlim_t oldlimit = limit.rlim_cur;
+
+ /* Set the max number of files if the current limit is not enough
+ * for our needs. */
+ if (oldlimit < maxfiles) {
+ limit.rlim_cur = maxfiles;
+ limit.rlim_max = maxfiles;
+ if (setrlimit(RLIMIT_NOFILE,&limit) == -1) {
+ server.maxclients = oldlimit-32;
+ redisLog(REDIS_WARNING,"Unable to set the max number of files limit to %d (%s), setting the max clients configuration to %d.",
+ (int) maxfiles, strerror(errno), (int) server.maxclients);
+ } else {
+ redisLog(REDIS_NOTICE,"Max number of open files set to %d",
+ (int) maxfiles);
+ }
+ }
+ }
}
void initServer() {
signal(SIGHUP, SIG_IGN);
signal(SIGPIPE, SIG_IGN);
- setupSigSegvAction();
+ setupSignalHandlers();
- server.mainthread = pthread_self();
- server.devnull = fopen("/dev/null","w");
- if (server.devnull == NULL) {
- redisLog(REDIS_WARNING, "Can't open /dev/null: %s", server.neterr);
- exit(1);
+ if (server.syslog_enabled) {
+ openlog(server.syslog_ident, LOG_PID | LOG_NDELAY | LOG_NOWAIT,
+ server.syslog_facility);
}
+
+ server.current_client = NULL;
server.clients = listCreate();
server.slaves = listCreate();
server.monitors = listCreate();
- server.objfreelist = listCreate();
+ server.unblocked_clients = listCreate();
+
createSharedObjects();
- server.el = aeCreateEventLoop();
+ adjustOpenFilesLimit();
+ server.el = aeCreateEventLoop(server.maxclients+1024);
server.db = zmalloc(sizeof(redisDb)*server.dbnum);
- server.fd = anetTcpServer(server.neterr, server.port, server.bindaddr);
- if (server.fd == -1) {
- redisLog(REDIS_WARNING, "Opening TCP port: %s", server.neterr);
+
+ if (server.port != 0) {
+ server.ipfd = anetTcpServer(server.neterr,server.port,server.bindaddr);
+ if (server.ipfd == ANET_ERR) {
+ redisLog(REDIS_WARNING, "Opening port %d: %s",
+ server.port, server.neterr);
+ exit(1);
+ }
+ }
+ if (server.unixsocket != NULL) {
+ unlink(server.unixsocket); /* don't care if this fails */
+ server.sofd = anetUnixServer(server.neterr,server.unixsocket,server.unixsocketperm);
+ if (server.sofd == ANET_ERR) {
+ redisLog(REDIS_WARNING, "Opening socket: %s", server.neterr);
+ exit(1);
+ }
+ }
+ if (server.ipfd < 0 && server.sofd < 0) {
+ redisLog(REDIS_WARNING, "Configured to not listen anywhere, exiting.");
exit(1);
}
for (j = 0; j < server.dbnum; j++) {
server.db[j].expires = dictCreate(&keyptrDictType,NULL);
server.db[j].blocking_keys = dictCreate(&keylistDictType,NULL);
server.db[j].watched_keys = dictCreate(&keylistDictType,NULL);
- if (server.vm_enabled)
- server.db[j].io_keys = dictCreate(&keylistDictType,NULL);
server.db[j].id = j;
}
server.pubsub_channels = dictCreate(&keylistDictType,NULL);
listSetFreeMethod(server.pubsub_patterns,freePubsubPattern);
listSetMatchMethod(server.pubsub_patterns,listMatchPubsubPattern);
server.cronloops = 0;
- server.bgsavechildpid = -1;
- server.bgrewritechildpid = -1;
- server.bgrewritebuf = sdsempty();
- server.aofbuf = sdsempty();
+ server.rdb_child_pid = -1;
+ server.aof_child_pid = -1;
+ server.aof_rewrite_buf = sdsempty();
+ server.aof_buf = sdsempty();
server.lastsave = time(NULL);
server.dirty = 0;
server.stat_numcommands = 0;
server.stat_numconnections = 0;
server.stat_expiredkeys = 0;
+ server.stat_evictedkeys = 0;
server.stat_starttime = time(NULL);
+ server.stat_keyspace_misses = 0;
+ server.stat_keyspace_hits = 0;
+ server.stat_peak_memory = 0;
+ server.stat_fork_time = 0;
+ server.stat_rejected_conn = 0;
server.unixtime = time(NULL);
aeCreateTimeEvent(server.el, 1, serverCron, NULL, NULL);
- if (aeCreateFileEvent(server.el, server.fd, AE_READABLE,
- acceptHandler, NULL) == AE_ERR) oom("creating file event");
-
- if (server.appendonly) {
- server.appendfd = open(server.appendfilename,O_WRONLY|O_APPEND|O_CREAT,0644);
- if (server.appendfd == -1) {
+ if (server.ipfd > 0 && aeCreateFileEvent(server.el,server.ipfd,AE_READABLE,
+ acceptTcpHandler,NULL) == AE_ERR) oom("creating file event");
+ if (server.sofd > 0 && aeCreateFileEvent(server.el,server.sofd,AE_READABLE,
+ acceptUnixHandler,NULL) == AE_ERR) oom("creating file event");
+
+ if (server.aof_state == REDIS_AOF_ON) {
+ server.aof_fd = open(server.aof_filename,
+ O_WRONLY|O_APPEND|O_CREAT,0644);
+ if (server.aof_fd == -1) {
redisLog(REDIS_WARNING, "Can't open the append-only file: %s",
strerror(errno));
exit(1);
}
}
- if (server.vm_enabled) vmInit();
+ if (server.cluster_enabled) clusterInit();
+ scriptingInit();
+ slowlogInit();
+ bioInit();
+ srand(time(NULL)^getpid());
+
}
-int qsortRedisCommands(const void *r1, const void *r2) {
- return strcasecmp(
- ((struct redisCommand*)r1)->name,
- ((struct redisCommand*)r2)->name);
+/* Populates the Redis Command Table starting from the hard coded list
+ * we have on top of redis.c file. */
+void populateCommandTable(void) {
+ int j;
+ int numcommands = sizeof(redisCommandTable)/sizeof(struct redisCommand);
+
+ for (j = 0; j < numcommands; j++) {
+ struct redisCommand *c = redisCommandTable+j;
+ char *f = c->sflags;
+ int retval;
+
+ while(*f != '\0') {
+ switch(*f) {
+ case 'w': c->flags |= REDIS_CMD_WRITE; break;
+ case 'r': c->flags |= REDIS_CMD_READONLY; break;
+ case 'm': c->flags |= REDIS_CMD_DENYOOM; break;
+ case 'a': c->flags |= REDIS_CMD_ADMIN; break;
+ case 'p': c->flags |= REDIS_CMD_PUBSUB; break;
+ case 'f': c->flags |= REDIS_CMD_FORCE_REPLICATION; break;
+ case 's': c->flags |= REDIS_CMD_NOSCRIPT; break;
+ case 'R': c->flags |= REDIS_CMD_RANDOM; break;
+ default: redisPanic("Unsupported command flag"); break;
+ }
+ f++;
+ }
+
+ retval = dictAdd(server.commands, sdsnew(c->name), c);
+ assert(retval == DICT_OK);
+ }
}
-void sortCommandTable() {
- /* Copy and sort the read-only version of the command table */
- commandTable = (struct redisCommand*)zmalloc(sizeof(readonlyCommandTable));
- memcpy(commandTable,readonlyCommandTable,sizeof(readonlyCommandTable));
- qsort(commandTable,
- sizeof(readonlyCommandTable)/sizeof(struct redisCommand),
- sizeof(struct redisCommand),qsortRedisCommands);
+void resetCommandTableStats(void) {
+ int numcommands = sizeof(redisCommandTable)/sizeof(struct redisCommand);
+ int j;
+
+ for (j = 0; j < numcommands; j++) {
+ struct redisCommand *c = redisCommandTable+j;
+
+ c->microseconds = 0;
+ c->calls = 0;
+ }
}
/* ====================== Commands lookup and execution ===================== */
-struct redisCommand *lookupCommand(char *name) {
- struct redisCommand tmp = {name,NULL,0,0,NULL,0,0,0};
- return bsearch(
- &tmp,
- commandTable,
- sizeof(readonlyCommandTable)/sizeof(struct redisCommand),
- sizeof(struct redisCommand),
- qsortRedisCommands);
+struct redisCommand *lookupCommand(sds name) {
+ return dictFetchValue(server.commands, name);
+}
+
+struct redisCommand *lookupCommandByCString(char *s) {
+ struct redisCommand *cmd;
+ sds name = sdsnew(s);
+
+ cmd = dictFetchValue(server.commands, name);
+ sdsfree(name);
+ return cmd;
}
/* Call() is the core of Redis execution of a command */
-void call(redisClient *c, struct redisCommand *cmd) {
- long long dirty;
+void call(redisClient *c) {
+ long long dirty, start = ustime(), duration;
dirty = server.dirty;
- cmd->proc(c);
+ c->cmd->proc(c);
dirty = server.dirty-dirty;
-
- if (server.appendonly && dirty)
- feedAppendOnlyFile(cmd,c->db->id,c->argv,c->argc);
- if ((dirty || cmd->flags & REDIS_CMD_FORCE_REPLICATION) &&
+ duration = ustime()-start;
+ c->cmd->microseconds += duration;
+ slowlogPushEntryIfNeeded(c->argv,c->argc,duration);
+ c->cmd->calls++;
+
+ if (server.aof_state != REDIS_AOF_OFF && dirty > 0)
+ feedAppendOnlyFile(c->cmd,c->db->id,c->argv,c->argc);
+ if ((dirty > 0 || c->cmd->flags & REDIS_CMD_FORCE_REPLICATION) &&
listLength(server.slaves))
replicationFeedSlaves(server.slaves,c->db->id,c->argv,c->argc);
if (listLength(server.monitors))
* and other operations can be performed by the caller. Otherwise
* if 0 is returned the client was destroied (i.e. after QUIT). */
int processCommand(redisClient *c) {
- struct redisCommand *cmd;
-
- /* Free some memory if needed (maxmemory setting) */
- if (server.maxmemory) freeMemoryIfNeeded();
-
- /* Handle the multi bulk command type. This is an alternative protocol
- * supported by Redis in order to receive commands that are composed of
- * multiple binary-safe "bulk" arguments. The latency of processing is
- * a bit higher but this allows things like multi-sets, so if this
- * protocol is used only for MSET and similar commands this is a big win. */
- if (c->multibulk == 0 && c->argc == 1 && ((char*)(c->argv[0]->ptr))[0] == '*') {
- c->multibulk = atoi(((char*)c->argv[0]->ptr)+1);
- if (c->multibulk <= 0) {
- resetClient(c);
- return 1;
- } else {
- decrRefCount(c->argv[c->argc-1]);
- c->argc--;
- return 1;
- }
- } else if (c->multibulk) {
- if (c->bulklen == -1) {
- if (((char*)c->argv[0]->ptr)[0] != '$') {
- addReplySds(c,sdsnew("-ERR multi bulk protocol error\r\n"));
- resetClient(c);
- return 1;
- } else {
- int bulklen = atoi(((char*)c->argv[0]->ptr)+1);
- decrRefCount(c->argv[0]);
- if (bulklen < 0 || bulklen > 1024*1024*1024) {
- c->argc--;
- addReplySds(c,sdsnew("-ERR invalid bulk write count\r\n"));
- resetClient(c);
- return 1;
- }
- c->argc--;
- c->bulklen = bulklen+2; /* add two bytes for CR+LF */
- return 1;
- }
- } else {
- c->mbargv = zrealloc(c->mbargv,(sizeof(robj*))*(c->mbargc+1));
- c->mbargv[c->mbargc] = c->argv[0];
- c->mbargc++;
- c->argc--;
- c->multibulk--;
- if (c->multibulk == 0) {
- robj **auxargv;
- int auxargc;
-
- /* Here we need to swap the multi-bulk argc/argv with the
- * normal argc/argv of the client structure. */
- auxargv = c->argv;
- c->argv = c->mbargv;
- c->mbargv = auxargv;
-
- auxargc = c->argc;
- c->argc = c->mbargc;
- c->mbargc = auxargc;
-
- /* We need to set bulklen to something different than -1
- * in order for the code below to process the command without
- * to try to read the last argument of a bulk command as
- * a special argument. */
- c->bulklen = 0;
- /* continue below and process the command */
- } else {
- c->bulklen = -1;
- return 1;
- }
- }
- }
- /* -- end of multi bulk commands processing -- */
-
- /* The QUIT command is handled as a special case. Normal command
- * procs are unable to close the client connection safely */
+ /* The QUIT command is handled separately. Normal command procs will
+ * go through checking for replication and QUIT will cause trouble
+ * when FORCE_REPLICATION is enabled and would be implemented in
+ * a regular command proc. */
if (!strcasecmp(c->argv[0]->ptr,"quit")) {
- freeClient(c);
- return 0;
+ addReply(c,shared.ok);
+ c->flags |= REDIS_CLOSE_AFTER_REPLY;
+ return REDIS_ERR;
}
/* Now lookup the command and check ASAP about trivial error conditions
- * such wrong arity, bad command name and so forth. */
- cmd = lookupCommand(c->argv[0]->ptr);
- if (!cmd) {
- addReplySds(c,
- sdscatprintf(sdsempty(), "-ERR unknown command '%s'\r\n",
- (char*)c->argv[0]->ptr));
- resetClient(c);
- return 1;
- } else if ((cmd->arity > 0 && cmd->arity != c->argc) ||
- (c->argc < -cmd->arity)) {
- addReplySds(c,
- sdscatprintf(sdsempty(),
- "-ERR wrong number of arguments for '%s' command\r\n",
- cmd->name));
- resetClient(c);
- return 1;
- } else if (cmd->flags & REDIS_CMD_BULK && c->bulklen == -1) {
- /* This is a bulk command, we have to read the last argument yet. */
- int bulklen = atoi(c->argv[c->argc-1]->ptr);
-
- decrRefCount(c->argv[c->argc-1]);
- if (bulklen < 0 || bulklen > 1024*1024*1024) {
- c->argc--;
- addReplySds(c,sdsnew("-ERR invalid bulk write count\r\n"));
- resetClient(c);
- return 1;
- }
- c->argc--;
- c->bulklen = bulklen+2; /* add two bytes for CR+LF */
- /* It is possible that the bulk read is already in the
- * buffer. Check this condition and handle it accordingly.
- * This is just a fast path, alternative to call processInputBuffer().
- * It's a good idea since the code is small and this condition
- * happens most of the times. */
- if ((signed)sdslen(c->querybuf) >= c->bulklen) {
- c->argv[c->argc] = createStringObject(c->querybuf,c->bulklen-2);
- c->argc++;
- c->querybuf = sdsrange(c->querybuf,c->bulklen,-1);
- } else {
- /* Otherwise return... there is to read the last argument
- * from the socket. */
- return 1;
- }
+ * such as wrong arity, bad command name and so forth. */
+ c->cmd = c->lastcmd = lookupCommand(c->argv[0]->ptr);
+ if (!c->cmd) {
+ addReplyErrorFormat(c,"unknown command '%s'",
+ (char*)c->argv[0]->ptr);
+ return REDIS_OK;
+ } else if ((c->cmd->arity > 0 && c->cmd->arity != c->argc) ||
+ (c->argc < -c->cmd->arity)) {
+ addReplyErrorFormat(c,"wrong number of arguments for '%s' command",
+ c->cmd->name);
+ return REDIS_OK;
}
- /* Let's try to encode the bulk object to save space. */
- if (cmd->flags & REDIS_CMD_BULK)
- c->argv[c->argc-1] = tryObjectEncoding(c->argv[c->argc-1]);
/* Check if the user is authenticated */
- if (server.requirepass && !c->authenticated && cmd->proc != authCommand) {
- addReplySds(c,sdsnew("-ERR operation not permitted\r\n"));
- resetClient(c);
- return 1;
+ if (server.requirepass && !c->authenticated && c->cmd->proc != authCommand)
+ {
+ addReplyError(c,"operation not permitted");
+ return REDIS_OK;
}
- /* Handle the maxmemory directive */
- if (server.maxmemory && (cmd->flags & REDIS_CMD_DENYOOM) &&
+ /* If cluster is enabled, redirect here */
+ if (server.cluster_enabled &&
+ !(c->cmd->getkeys_proc == NULL && c->cmd->firstkey == 0)) {
+ int hashslot;
+
+ if (server.cluster.state != REDIS_CLUSTER_OK) {
+ addReplyError(c,"The cluster is down. Check with CLUSTER INFO for more information");
+ return REDIS_OK;
+ } else {
+ int ask;
+ clusterNode *n = getNodeByQuery(c,c->cmd,c->argv,c->argc,&hashslot,&ask);
+ if (n == NULL) {
+ addReplyError(c,"Multi keys request invalid in cluster");
+ return REDIS_OK;
+ } else if (n != server.cluster.myself) {
+ addReplySds(c,sdscatprintf(sdsempty(),
+ "-%s %d %s:%d\r\n", ask ? "ASK" : "MOVED",
+ hashslot,n->ip,n->port));
+ return REDIS_OK;
+ }
+ }
+ }
+
+ /* Handle the maxmemory directive.
+ *
+ * First we try to free some memory if possible (if there are volatile
+ * keys in the dataset). If there are not the only thing we can do
+ * is returning an error. */
+ if (server.maxmemory) freeMemoryIfNeeded();
+ if (server.maxmemory && (c->cmd->flags & REDIS_CMD_DENYOOM) &&
zmalloc_used_memory() > server.maxmemory)
{
- addReplySds(c,sdsnew("-ERR command not allowed when used memory > 'maxmemory'\r\n"));
- resetClient(c);
- return 1;
+ addReplyError(c,"command not allowed when used memory > 'maxmemory'");
+ return REDIS_OK;
}
/* Only allow SUBSCRIBE and UNSUBSCRIBE in the context of Pub/Sub */
if ((dictSize(c->pubsub_channels) > 0 || listLength(c->pubsub_patterns) > 0)
&&
- cmd->proc != subscribeCommand && cmd->proc != unsubscribeCommand &&
- cmd->proc != psubscribeCommand && cmd->proc != punsubscribeCommand) {
- addReplySds(c,sdsnew("-ERR only (P)SUBSCRIBE / (P)UNSUBSCRIBE / QUIT allowed in this context\r\n"));
- resetClient(c);
- return 1;
+ c->cmd->proc != subscribeCommand &&
+ c->cmd->proc != unsubscribeCommand &&
+ c->cmd->proc != psubscribeCommand &&
+ c->cmd->proc != punsubscribeCommand) {
+ addReplyError(c,"only (P)SUBSCRIBE / (P)UNSUBSCRIBE / QUIT allowed in this context");
+ return REDIS_OK;
+ }
+
+ /* Only allow INFO and SLAVEOF when slave-serve-stale-data is no and
+ * we are a slave with a broken link with master. */
+ if (server.masterhost && server.repl_state != REDIS_REPL_CONNECTED &&
+ server.repl_serve_stale_data == 0 &&
+ c->cmd->proc != infoCommand && c->cmd->proc != slaveofCommand)
+ {
+ addReplyError(c,
+ "link with MASTER is down and slave-serve-stale-data is set to no");
+ return REDIS_OK;
+ }
+
+ /* Loading DB? Return an error if the command is not INFO */
+ if (server.loading && c->cmd->proc != infoCommand) {
+ addReply(c, shared.loadingerr);
+ return REDIS_OK;
+ }
+
+ /* Lua script too slow? Only allow SHUTDOWN NOSAVE and SCRIPT KILL. */
+ if (server.lua_timedout &&
+ !(c->cmd->proc != shutdownCommand &&
+ c->argc == 2 &&
+ tolower(((char*)c->argv[1]->ptr)[0]) == 'n') &&
+ !(c->cmd->proc == scriptCommand &&
+ c->argc == 2 &&
+ tolower(((char*)c->argv[1]->ptr)[0]) == 'k'))
+ {
+ addReply(c, shared.slowscripterr);
+ return REDIS_OK;
}
/* Exec the command */
if (c->flags & REDIS_MULTI &&
- cmd->proc != execCommand && cmd->proc != discardCommand &&
- cmd->proc != multiCommand && cmd->proc != watchCommand)
+ c->cmd->proc != execCommand && c->cmd->proc != discardCommand &&
+ c->cmd->proc != multiCommand && c->cmd->proc != watchCommand)
{
- queueMultiCommand(c,cmd);
+ queueMultiCommand(c);
addReply(c,shared.queued);
} else {
- if (server.vm_enabled && server.vm_max_threads > 0 &&
- blockClientOnSwappedKeys(c,cmd)) return 1;
- call(c,cmd);
+ call(c);
}
-
- /* Prepare the client for the next command */
- resetClient(c);
- return 1;
+ return REDIS_OK;
}
/*================================== Shutdown =============================== */
-int prepareForShutdown() {
- redisLog(REDIS_WARNING,"User requested shutdown, saving DB...");
+int prepareForShutdown(int flags) {
+ int save = flags & REDIS_SHUTDOWN_SAVE;
+ int nosave = flags & REDIS_SHUTDOWN_NOSAVE;
+
+ redisLog(REDIS_WARNING,"User requested shutdown...");
/* Kill the saving child if there is a background saving in progress.
We want to avoid race conditions, for instance our saving child may
overwrite the synchronous saving did by SHUTDOWN. */
- if (server.bgsavechildpid != -1) {
- redisLog(REDIS_WARNING,"There is a live saving child. Killing it!");
- kill(server.bgsavechildpid,SIGKILL);
- rdbRemoveTempFile(server.bgsavechildpid);
+ if (server.rdb_child_pid != -1) {
+ redisLog(REDIS_WARNING,"There is a child saving an .rdb. Killing it!");
+ kill(server.rdb_child_pid,SIGKILL);
+ rdbRemoveTempFile(server.rdb_child_pid);
}
- if (server.appendonly) {
+ if (server.aof_state != REDIS_AOF_OFF) {
+ /* Kill the AOF saving child as the AOF we already have may be longer
+ * but contains the full dataset anyway. */
+ if (server.aof_child_pid != -1) {
+ redisLog(REDIS_WARNING,
+ "There is a child rewriting the AOF. Killing it!");
+ kill(server.aof_child_pid,SIGKILL);
+ }
/* Append only file: fsync() the AOF and exit */
- aof_fsync(server.appendfd);
- if (server.vm_enabled) unlink(server.vm_swap_file);
- } else {
+ redisLog(REDIS_NOTICE,"Calling fsync() on the AOF file.");
+ aof_fsync(server.aof_fd);
+ }
+ if ((server.saveparamslen > 0 && !nosave) || save) {
+ redisLog(REDIS_NOTICE,"Saving the final RDB snapshot before exiting.");
/* Snapshotting. Perform a SYNC SAVE and exit */
- if (rdbSave(server.dbfilename) == REDIS_OK) {
- if (server.daemonize)
- unlink(server.pidfile);
- redisLog(REDIS_WARNING,"%zu bytes used at exit",zmalloc_used_memory());
- } else {
+ if (rdbSave(server.rdb_filename) != REDIS_OK) {
/* Ooops.. error saving! The best we can do is to continue
* operating. Note that if there was a background saving process,
* in the next cron() Redis will be notified that the background
* saving aborted, handling special stuff like slaves pending for
* synchronization... */
- redisLog(REDIS_WARNING,"Error trying to save the DB, can't exit");
+ redisLog(REDIS_WARNING,"Error trying to save the DB, can't exit.");
return REDIS_ERR;
}
}
- redisLog(REDIS_WARNING,"Server exit now, bye bye...");
+ if (server.daemonize) {
+ redisLog(REDIS_NOTICE,"Removing the pid file.");
+ unlink(server.pidfile);
+ }
+ /* Close the listening sockets. Apparently this allows faster restarts. */
+ if (server.ipfd != -1) close(server.ipfd);
+ if (server.sofd != -1) close(server.sofd);
+ if (server.unixsocket) {
+ redisLog(REDIS_NOTICE,"Removing the unix socket file.");
+ unlink(server.unixsocket); /* don't care if this fails */
+ }
+
+ redisLog(REDIS_WARNING,"Redis is now ready to exit, bye bye...");
return REDIS_OK;
}
/*================================== Commands =============================== */
void authCommand(redisClient *c) {
- if (!server.requirepass || !strcmp(c->argv[1]->ptr, server.requirepass)) {
+ if (!server.requirepass) {
+ addReplyError(c,"Client sent AUTH, but no password is set");
+ } else if (!strcmp(c->argv[1]->ptr, server.requirepass)) {
c->authenticated = 1;
addReply(c,shared.ok);
} else {
c->authenticated = 0;
- addReplySds(c,sdscatprintf(sdsempty(),"-ERR invalid password\r\n"));
+ addReplyError(c,"invalid password");
}
}
/* Create the string returned by the INFO command. This is decoupled
* by the INFO command itself as we need to report the same information
* on memory corruption problems. */
-sds genRedisInfoString(void) {
- sds info;
+sds genRedisInfoString(char *section) {
+ sds info = sdsempty();
time_t uptime = time(NULL)-server.stat_starttime;
- int j;
- char hmem[64];
-
- bytesToHuman(hmem,zmalloc_used_memory());
- info = sdscatprintf(sdsempty(),
- "redis_version:%s\r\n"
- "redis_git_sha1:%s\r\n"
- "redis_git_dirty:%d\r\n"
- "arch_bits:%s\r\n"
- "multiplexing_api:%s\r\n"
- "process_id:%ld\r\n"
- "uptime_in_seconds:%ld\r\n"
- "uptime_in_days:%ld\r\n"
- "connected_clients:%d\r\n"
- "connected_slaves:%d\r\n"
- "blocked_clients:%d\r\n"
- "used_memory:%zu\r\n"
- "used_memory_human:%s\r\n"
- "changes_since_last_save:%lld\r\n"
- "bgsave_in_progress:%d\r\n"
- "last_save_time:%ld\r\n"
- "bgrewriteaof_in_progress:%d\r\n"
- "total_connections_received:%lld\r\n"
- "total_commands_processed:%lld\r\n"
- "expired_keys:%lld\r\n"
- "hash_max_zipmap_entries:%zu\r\n"
- "hash_max_zipmap_value:%zu\r\n"
- "pubsub_channels:%ld\r\n"
- "pubsub_patterns:%u\r\n"
- "vm_enabled:%d\r\n"
- "role:%s\r\n"
- ,REDIS_VERSION,
- redisGitSHA1(),
- strtol(redisGitDirty(),NULL,10) > 0,
- (sizeof(long) == 8) ? "64" : "32",
- aeGetApiName(),
- (long) getpid(),
- uptime,
- uptime/(3600*24),
- listLength(server.clients)-listLength(server.slaves),
- listLength(server.slaves),
- server.blpop_blocked_clients,
- zmalloc_used_memory(),
- hmem,
- server.dirty,
- server.bgsavechildpid != -1,
- server.lastsave,
- server.bgrewritechildpid != -1,
- server.stat_numconnections,
- server.stat_numcommands,
- server.stat_expiredkeys,
- server.hash_max_zipmap_entries,
- server.hash_max_zipmap_value,
- dictSize(server.pubsub_channels),
- listLength(server.pubsub_patterns),
- server.vm_enabled != 0,
- server.masterhost == NULL ? "master" : "slave"
- );
- if (server.masterhost) {
+ int j, numcommands;
+ struct rusage self_ru, c_ru;
+ unsigned long lol, bib;
+ int allsections = 0, defsections = 0;
+ int sections = 0;
+
+ if (section) {
+ allsections = strcasecmp(section,"all") == 0;
+ defsections = strcasecmp(section,"default") == 0;
+ }
+
+ getrusage(RUSAGE_SELF, &self_ru);
+ getrusage(RUSAGE_CHILDREN, &c_ru);
+ getClientsMaxBuffers(&lol,&bib);
+
+ /* Server */
+ if (allsections || defsections || !strcasecmp(section,"server")) {
+ if (sections++) info = sdscat(info,"\r\n");
info = sdscatprintf(info,
- "master_host:%s\r\n"
- "master_port:%d\r\n"
- "master_link_status:%s\r\n"
- "master_last_io_seconds_ago:%d\r\n"
- ,server.masterhost,
- server.masterport,
- (server.replstate == REDIS_REPL_CONNECTED) ?
- "up" : "down",
- server.master ? ((int)(time(NULL)-server.master->lastinteraction)) : -1
- );
+ "# Server\r\n"
+ "redis_version:%s\r\n"
+ "redis_git_sha1:%s\r\n"
+ "redis_git_dirty:%d\r\n"
+ "arch_bits:%s\r\n"
+ "multiplexing_api:%s\r\n"
+ "gcc_version:%d.%d.%d\r\n"
+ "process_id:%ld\r\n"
+ "tcp_port:%d\r\n"
+ "uptime_in_seconds:%ld\r\n"
+ "uptime_in_days:%ld\r\n"
+ "lru_clock:%ld\r\n",
+ REDIS_VERSION,
+ redisGitSHA1(),
+ strtol(redisGitDirty(),NULL,10) > 0,
+ (sizeof(long) == 8) ? "64" : "32",
+ aeGetApiName(),
+#ifdef __GNUC__
+ __GNUC__,__GNUC_MINOR__,__GNUC_PATCHLEVEL__,
+#else
+ 0,0,0,
+#endif
+ (long) getpid(),
+ server.port,
+ uptime,
+ uptime/(3600*24),
+ (unsigned long) server.lruclock);
}
- if (server.vm_enabled) {
- lockThreadedIO();
+
+ /* Clients */
+ if (allsections || defsections || !strcasecmp(section,"clients")) {
+ if (sections++) info = sdscat(info,"\r\n");
info = sdscatprintf(info,
- "vm_conf_max_memory:%llu\r\n"
- "vm_conf_page_size:%llu\r\n"
- "vm_conf_pages:%llu\r\n"
- "vm_stats_used_pages:%llu\r\n"
- "vm_stats_swapped_objects:%llu\r\n"
- "vm_stats_swappin_count:%llu\r\n"
- "vm_stats_swappout_count:%llu\r\n"
- "vm_stats_io_newjobs_len:%lu\r\n"
- "vm_stats_io_processing_len:%lu\r\n"
- "vm_stats_io_processed_len:%lu\r\n"
- "vm_stats_io_active_threads:%lu\r\n"
- "vm_stats_blocked_clients:%lu\r\n"
- ,(unsigned long long) server.vm_max_memory,
- (unsigned long long) server.vm_page_size,
- (unsigned long long) server.vm_pages,
- (unsigned long long) server.vm_stats_used_pages,
- (unsigned long long) server.vm_stats_swapped_objects,
- (unsigned long long) server.vm_stats_swapins,
- (unsigned long long) server.vm_stats_swapouts,
- (unsigned long) listLength(server.io_newjobs),
- (unsigned long) listLength(server.io_processing),
- (unsigned long) listLength(server.io_processed),
- (unsigned long) server.io_active_threads,
- (unsigned long) server.vm_blocked_clients
- );
- unlockThreadedIO();
+ "# Clients\r\n"
+ "connected_clients:%d\r\n"
+ "client_longest_output_list:%lu\r\n"
+ "client_biggest_input_buf:%lu\r\n"
+ "blocked_clients:%d\r\n",
+ listLength(server.clients)-listLength(server.slaves),
+ lol, bib,
+ server.bpop_blocked_clients);
}
- for (j = 0; j < server.dbnum; j++) {
- long long keys, vkeys;
- keys = dictSize(server.db[j].dict);
- vkeys = dictSize(server.db[j].expires);
- if (keys || vkeys) {
- info = sdscatprintf(info, "db%d:keys=%lld,expires=%lld\r\n",
- j, keys, vkeys);
+ /* Memory */
+ if (allsections || defsections || !strcasecmp(section,"memory")) {
+ char hmem[64];
+ char peak_hmem[64];
+
+ bytesToHuman(hmem,zmalloc_used_memory());
+ bytesToHuman(peak_hmem,server.stat_peak_memory);
+ if (sections++) info = sdscat(info,"\r\n");
+ info = sdscatprintf(info,
+ "# Memory\r\n"
+ "used_memory:%zu\r\n"
+ "used_memory_human:%s\r\n"
+ "used_memory_rss:%zu\r\n"
+ "used_memory_peak:%zu\r\n"
+ "used_memory_peak_human:%s\r\n"
+ "used_memory_lua:%lld\r\n"
+ "mem_fragmentation_ratio:%.2f\r\n"
+ "mem_allocator:%s\r\n",
+ zmalloc_used_memory(),
+ hmem,
+ zmalloc_get_rss(),
+ server.stat_peak_memory,
+ peak_hmem,
+ ((long long)lua_gc(server.lua,LUA_GCCOUNT,0))*1024LL,
+ zmalloc_get_fragmentation_ratio(),
+ ZMALLOC_LIB
+ );
+ }
+
+ /* Persistence */
+ if (allsections || defsections || !strcasecmp(section,"persistence")) {
+ if (sections++) info = sdscat(info,"\r\n");
+ info = sdscatprintf(info,
+ "# Persistence\r\n"
+ "loading:%d\r\n"
+ "aof_enabled:%d\r\n"
+ "changes_since_last_save:%lld\r\n"
+ "bgsave_in_progress:%d\r\n"
+ "last_save_time:%ld\r\n"
+ "bgrewriteaof_in_progress:%d\r\n",
+ server.loading,
+ server.aof_state != REDIS_AOF_OFF,
+ server.dirty,
+ server.rdb_child_pid != -1,
+ server.lastsave,
+ server.aof_child_pid != -1);
+
+ if (server.aof_state != REDIS_AOF_OFF) {
+ info = sdscatprintf(info,
+ "aof_current_size:%lld\r\n"
+ "aof_base_size:%lld\r\n"
+ "aof_pending_rewrite:%d\r\n"
+ "aof_buffer_length:%zu\r\n"
+ "aof_pending_bio_fsync:%llu\r\n",
+ (long long) server.aof_current_size,
+ (long long) server.aof_rewrite_base_size,
+ server.aof_rewrite_scheduled,
+ sdslen(server.aof_buf),
+ bioPendingJobsOfType(REDIS_BIO_AOF_FSYNC));
+ }
+
+ if (server.loading) {
+ double perc;
+ time_t eta, elapsed;
+ off_t remaining_bytes = server.loading_total_bytes-
+ server.loading_loaded_bytes;
+
+ perc = ((double)server.loading_loaded_bytes /
+ server.loading_total_bytes) * 100;
+
+ elapsed = time(NULL)-server.loading_start_time;
+ if (elapsed == 0) {
+ eta = 1; /* A fake 1 second figure if we don't have
+ enough info */
+ } else {
+ eta = (elapsed*remaining_bytes)/server.loading_loaded_bytes;
+ }
+
+ info = sdscatprintf(info,
+ "loading_start_time:%ld\r\n"
+ "loading_total_bytes:%llu\r\n"
+ "loading_loaded_bytes:%llu\r\n"
+ "loading_loaded_perc:%.2f\r\n"
+ "loading_eta_seconds:%ld\r\n"
+ ,(unsigned long) server.loading_start_time,
+ (unsigned long long) server.loading_total_bytes,
+ (unsigned long long) server.loading_loaded_bytes,
+ perc,
+ eta
+ );
+ }
+ }
+
+ /* Stats */
+ if (allsections || defsections || !strcasecmp(section,"stats")) {
+ if (sections++) info = sdscat(info,"\r\n");
+ info = sdscatprintf(info,
+ "# Stats\r\n"
+ "total_connections_received:%lld\r\n"
+ "total_commands_processed:%lld\r\n"
+ "rejected_connections:%lld\r\n"
+ "expired_keys:%lld\r\n"
+ "evicted_keys:%lld\r\n"
+ "keyspace_hits:%lld\r\n"
+ "keyspace_misses:%lld\r\n"
+ "pubsub_channels:%ld\r\n"
+ "pubsub_patterns:%u\r\n"
+ "latest_fork_usec:%lld\r\n",
+ server.stat_numconnections,
+ server.stat_numcommands,
+ server.stat_rejected_conn,
+ server.stat_expiredkeys,
+ server.stat_evictedkeys,
+ server.stat_keyspace_hits,
+ server.stat_keyspace_misses,
+ dictSize(server.pubsub_channels),
+ listLength(server.pubsub_patterns),
+ server.stat_fork_time);
+ }
+
+ /* Replication */
+ if (allsections || defsections || !strcasecmp(section,"replication")) {
+ if (sections++) info = sdscat(info,"\r\n");
+ info = sdscatprintf(info,
+ "# Replication\r\n"
+ "role:%s\r\n",
+ server.masterhost == NULL ? "master" : "slave");
+ if (server.masterhost) {
+ info = sdscatprintf(info,
+ "master_host:%s\r\n"
+ "master_port:%d\r\n"
+ "master_link_status:%s\r\n"
+ "master_last_io_seconds_ago:%d\r\n"
+ "master_sync_in_progress:%d\r\n"
+ ,server.masterhost,
+ server.masterport,
+ (server.repl_state == REDIS_REPL_CONNECTED) ?
+ "up" : "down",
+ server.master ?
+ ((int)(time(NULL)-server.master->lastinteraction)) : -1,
+ server.repl_state == REDIS_REPL_TRANSFER
+ );
+
+ if (server.repl_state == REDIS_REPL_TRANSFER) {
+ info = sdscatprintf(info,
+ "master_sync_left_bytes:%ld\r\n"
+ "master_sync_last_io_seconds_ago:%d\r\n"
+ ,(long)server.repl_transfer_left,
+ (int)(time(NULL)-server.repl_transfer_lastio)
+ );
+ }
+
+ if (server.repl_state != REDIS_REPL_CONNECTED) {
+ info = sdscatprintf(info,
+ "master_link_down_since_seconds:%ld\r\n",
+ (long)time(NULL)-server.repl_down_since);
+ }
+ }
+ info = sdscatprintf(info,
+ "connected_slaves:%d\r\n",
+ listLength(server.slaves));
+ if (listLength(server.slaves)) {
+ int slaveid = 0;
+ listNode *ln;
+ listIter li;
+
+ listRewind(server.slaves,&li);
+ while((ln = listNext(&li))) {
+ redisClient *slave = listNodeValue(ln);
+ char *state = NULL;
+ char ip[32];
+ int port;
+
+ if (anetPeerToString(slave->fd,ip,&port) == -1) continue;
+ switch(slave->replstate) {
+ case REDIS_REPL_WAIT_BGSAVE_START:
+ case REDIS_REPL_WAIT_BGSAVE_END:
+ state = "wait_bgsave";
+ break;
+ case REDIS_REPL_SEND_BULK:
+ state = "send_bulk";
+ break;
+ case REDIS_REPL_ONLINE:
+ state = "online";
+ break;
+ }
+ if (state == NULL) continue;
+ info = sdscatprintf(info,"slave%d:%s,%d,%s\r\n",
+ slaveid,ip,port,state);
+ slaveid++;
+ }
+ }
+ }
+
+ /* CPU */
+ if (allsections || defsections || !strcasecmp(section,"cpu")) {
+ if (sections++) info = sdscat(info,"\r\n");
+ info = sdscatprintf(info,
+ "# CPU\r\n"
+ "used_cpu_sys:%.2f\r\n"
+ "used_cpu_user:%.2f\r\n"
+ "used_cpu_sys_children:%.2f\r\n"
+ "used_cpu_user_children:%.2f\r\n",
+ (float)self_ru.ru_stime.tv_sec+(float)self_ru.ru_stime.tv_usec/1000000,
+ (float)self_ru.ru_utime.tv_sec+(float)self_ru.ru_utime.tv_usec/1000000,
+ (float)c_ru.ru_stime.tv_sec+(float)c_ru.ru_stime.tv_usec/1000000,
+ (float)c_ru.ru_utime.tv_sec+(float)c_ru.ru_utime.tv_usec/1000000);
+ }
+
+ /* cmdtime */
+ if (allsections || !strcasecmp(section,"commandstats")) {
+ if (sections++) info = sdscat(info,"\r\n");
+ info = sdscatprintf(info, "# Commandstats\r\n");
+ numcommands = sizeof(redisCommandTable)/sizeof(struct redisCommand);
+ for (j = 0; j < numcommands; j++) {
+ struct redisCommand *c = redisCommandTable+j;
+
+ if (!c->calls) continue;
+ info = sdscatprintf(info,
+ "cmdstat_%s:calls=%lld,usec=%lld,usec_per_call=%.2f\r\n",
+ c->name, c->calls, c->microseconds,
+ (c->calls == 0) ? 0 : ((float)c->microseconds/c->calls));
+ }
+ }
+
+ /* Clusetr */
+ if (allsections || defsections || !strcasecmp(section,"cluster")) {
+ if (sections++) info = sdscat(info,"\r\n");
+ info = sdscatprintf(info,
+ "# Cluster\r\n"
+ "cluster_enabled:%d\r\n",
+ server.cluster_enabled);
+ }
+
+ /* Key space */
+ if (allsections || defsections || !strcasecmp(section,"keyspace")) {
+ if (sections++) info = sdscat(info,"\r\n");
+ info = sdscatprintf(info, "# Keyspace\r\n");
+ for (j = 0; j < server.dbnum; j++) {
+ long long keys, vkeys;
+
+ keys = dictSize(server.db[j].dict);
+ vkeys = dictSize(server.db[j].expires);
+ if (keys || vkeys) {
+ info = sdscatprintf(info, "db%d:keys=%lld,expires=%lld\r\n",
+ j, keys, vkeys);
+ }
}
}
return info;
}
void infoCommand(redisClient *c) {
- sds info = genRedisInfoString();
+ char *section = c->argc == 2 ? c->argv[1]->ptr : "default";
+
+ if (c->argc > 2) {
+ addReply(c,shared.syntaxerr);
+ return;
+ }
+ sds info = genRedisInfoString(section);
addReplySds(c,sdscatprintf(sdsempty(),"$%lu\r\n",
(unsigned long)sdslen(info)));
addReplySds(c,info);
/* ============================ Maxmemory directive ======================== */
-/* Try to free one object form the pre-allocated objects free list.
- * This is useful under low mem conditions as by default we take 1 million
- * free objects allocated. On success REDIS_OK is returned, otherwise
- * REDIS_ERR. */
-int tryFreeOneObjectFromFreelist(void) {
- robj *o;
-
- if (server.vm_enabled) pthread_mutex_lock(&server.obj_freelist_mutex);
- if (listLength(server.objfreelist)) {
- listNode *head = listFirst(server.objfreelist);
- o = listNodeValue(head);
- listDelNode(server.objfreelist,head);
- if (server.vm_enabled) pthread_mutex_unlock(&server.obj_freelist_mutex);
- zfree(o);
- return REDIS_OK;
- } else {
- if (server.vm_enabled) pthread_mutex_unlock(&server.obj_freelist_mutex);
- return REDIS_ERR;
- }
-}
-
/* This function gets called when 'maxmemory' is set on the config file to limit
* the max memory used by the server, and we are out of memory.
* This function will try to, in order:
* memory usage.
*/
void freeMemoryIfNeeded(void) {
+ /* Remove keys accordingly to the active policy as long as we are
+ * over the memory limit. */
+ if (server.maxmemory_policy == REDIS_MAXMEMORY_NO_EVICTION) return;
+
while (server.maxmemory && zmalloc_used_memory() > server.maxmemory) {
int j, k, freed = 0;
- if (tryFreeOneObjectFromFreelist() == REDIS_OK) continue;
for (j = 0; j < server.dbnum; j++) {
- int minttl = -1;
- robj *minkey = NULL;
+ long bestval = 0; /* just to prevent warning */
+ sds bestkey = NULL;
struct dictEntry *de;
+ redisDb *db = server.db+j;
+ dict *dict;
+
+ if (server.maxmemory_policy == REDIS_MAXMEMORY_ALLKEYS_LRU ||
+ server.maxmemory_policy == REDIS_MAXMEMORY_ALLKEYS_RANDOM)
+ {
+ dict = server.db[j].dict;
+ } else {
+ dict = server.db[j].expires;
+ }
+ if (dictSize(dict) == 0) continue;
+
+ /* volatile-random and allkeys-random policy */
+ if (server.maxmemory_policy == REDIS_MAXMEMORY_ALLKEYS_RANDOM ||
+ server.maxmemory_policy == REDIS_MAXMEMORY_VOLATILE_RANDOM)
+ {
+ de = dictGetRandomKey(dict);
+ bestkey = dictGetKey(de);
+ }
+
+ /* volatile-lru and allkeys-lru policy */
+ else if (server.maxmemory_policy == REDIS_MAXMEMORY_ALLKEYS_LRU ||
+ server.maxmemory_policy == REDIS_MAXMEMORY_VOLATILE_LRU)
+ {
+ for (k = 0; k < server.maxmemory_samples; k++) {
+ sds thiskey;
+ long thisval;
+ robj *o;
+
+ de = dictGetRandomKey(dict);
+ thiskey = dictGetKey(de);
+ /* When policy is volatile-lru we need an additonal lookup
+ * to locate the real key, as dict is set to db->expires. */
+ if (server.maxmemory_policy == REDIS_MAXMEMORY_VOLATILE_LRU)
+ de = dictFind(db->dict, thiskey);
+ o = dictGetVal(de);
+ thisval = estimateObjectIdleTime(o);
+
+ /* Higher idle time is better candidate for deletion */
+ if (bestkey == NULL || thisval > bestval) {
+ bestkey = thiskey;
+ bestval = thisval;
+ }
+ }
+ }
- if (dictSize(server.db[j].expires)) {
- freed = 1;
- /* From a sample of three keys drop the one nearest to
- * the natural expire */
- for (k = 0; k < 3; k++) {
- time_t t;
-
- de = dictGetRandomKey(server.db[j].expires);
- t = (time_t) dictGetEntryVal(de);
- if (minttl == -1 || t < minttl) {
- minkey = dictGetEntryKey(de);
- minttl = t;
+ /* volatile-ttl */
+ else if (server.maxmemory_policy == REDIS_MAXMEMORY_VOLATILE_TTL) {
+ for (k = 0; k < server.maxmemory_samples; k++) {
+ sds thiskey;
+ long thisval;
+
+ de = dictGetRandomKey(dict);
+ thiskey = dictGetKey(de);
+ thisval = (long) dictGetVal(de);
+
+ /* Expire sooner (minor expire unix timestamp) is better
+ * candidate for deletion */
+ if (bestkey == NULL || thisval < bestval) {
+ bestkey = thiskey;
+ bestval = thisval;
}
}
- dbDelete(server.db+j,minkey);
+ }
+
+ /* Finally remove the selected key. */
+ if (bestkey) {
+ robj *keyobj = createStringObject(bestkey,sdslen(bestkey));
+ propagateExpire(db,keyobj);
+ dbDelete(db,keyobj);
+ server.stat_evictedkeys++;
+ decrRefCount(keyobj);
+ freed++;
}
}
if (!freed) return; /* nothing to free... */
}
#endif /* __linux__ */
+void createPidFile(void) {
+ /* Try to write the pid file in a best-effort way. */
+ FILE *fp = fopen(server.pidfile,"w");
+ if (fp) {
+ fprintf(fp,"%d\n",(int)getpid());
+ fclose(fp);
+ }
+}
+
void daemonize(void) {
int fd;
- FILE *fp;
if (fork() != 0) exit(0); /* parent exits */
setsid(); /* create a new session */
dup2(fd, STDERR_FILENO);
if (fd > STDERR_FILENO) close(fd);
}
- /* Try to write the pid file */
- fp = fopen(server.pidfile,"w");
- if (fp) {
- fprintf(fp,"%d\n",getpid());
- fclose(fp);
- }
}
void version() {
}
void usage() {
- fprintf(stderr,"Usage: ./redis-server [/path/to/redis.conf]\n");
+ fprintf(stderr,"Usage: ./redis-server [/path/to/redis.conf] [options]\n");
fprintf(stderr," ./redis-server - (read config from stdin)\n");
+ fprintf(stderr," ./redis-server -v or --version\n");
+ fprintf(stderr," ./redis-server -h or --help\n\n");
+ fprintf(stderr,"Examples:\n");
+ fprintf(stderr," ./redis-server (run the server with default conf)\n");
+ fprintf(stderr," ./redis-server /etc/redis/6379.conf\n");
+ fprintf(stderr," ./redis-server --port 7777\n");
+ fprintf(stderr," ./redis-server --port 7777 --slaveof 127.0.0.1 8888\n");
+ fprintf(stderr," ./redis-server /etc/myredis.conf --loglevel verbose\n");
exit(1);
}
+void redisAsciiArt(void) {
+#include "asciilogo.h"
+ char *buf = zmalloc(1024*16);
+
+ snprintf(buf,1024*16,ascii_logo,
+ REDIS_VERSION,
+ redisGitSHA1(),
+ strtol(redisGitDirty(),NULL,10) > 0,
+ (sizeof(long) == 8) ? "64" : "32",
+ server.cluster_enabled ? "cluster" : "stand alone",
+ server.port,
+ (long) getpid()
+ );
+ redisLogRaw(REDIS_NOTICE|REDIS_LOG_RAW,buf);
+ zfree(buf);
+}
+
+static void sigtermHandler(int sig) {
+ REDIS_NOTUSED(sig);
+
+ redisLog(REDIS_WARNING,"Received SIGTERM, scheduling shutdown...");
+ server.shutdown_asap = 1;
+}
+
+void setupSignalHandlers(void) {
+ struct sigaction act;
+
+ /* When the SA_SIGINFO flag is set in sa_flags then sa_sigaction is used.
+ * Otherwise, sa_handler is used. */
+ sigemptyset(&act.sa_mask);
+ act.sa_flags = SA_NODEFER | SA_ONSTACK | SA_RESETHAND;
+ act.sa_handler = sigtermHandler;
+ sigaction(SIGTERM, &act, NULL);
+
+#ifdef HAVE_BACKTRACE
+ sigemptyset(&act.sa_mask);
+ act.sa_flags = SA_NODEFER | SA_ONSTACK | SA_RESETHAND | SA_SIGINFO;
+ act.sa_sigaction = sigsegvHandler;
+ sigaction(SIGSEGV, &act, NULL);
+ sigaction(SIGBUS, &act, NULL);
+ sigaction(SIGFPE, &act, NULL);
+ sigaction(SIGILL, &act, NULL);
+#endif
+ return;
+}
+
int main(int argc, char **argv) {
- time_t start;
+ long long start;
+ zmalloc_enable_thread_safeness();
initServerConfig();
- sortCommandTable();
- if (argc == 2) {
+ if (argc >= 2) {
+ int j = 1; /* First option to parse in argv[] */
+ sds options = sdsempty();
+ char *configfile = NULL;
+
+ /* Handle special options --help and --version */
if (strcmp(argv[1], "-v") == 0 ||
strcmp(argv[1], "--version") == 0) version();
- if (strcmp(argv[1], "--help") == 0) usage();
+ if (strcmp(argv[1], "--help") == 0 ||
+ strcmp(argv[1], "-h") == 0) usage();
+ /* First argument is the config file name? */
+ if (argv[j][0] != '-' || argv[j][1] != '-')
+ configfile = argv[j++];
+ /* All the other options are parsed and conceptually appended to the
+ * configuration file. For instance --port 6380 will generate the
+ * string "port 6380\n" to be parsed after the actual file name
+ * is parsed, if any. */
+ while(j != argc) {
+ if (argv[j][0] == '-' && argv[j][1] == '-') {
+ /* Option name */
+ if (sdslen(options)) options = sdscat(options,"\n");
+ options = sdscat(options,argv[j]+2);
+ options = sdscat(options," ");
+ } else {
+ /* Option argument */
+ options = sdscatrepr(options,argv[j],strlen(argv[j]));
+ options = sdscat(options," ");
+ }
+ j++;
+ }
resetServerSaveParams();
- loadServerConfig(argv[1]);
- } else if ((argc > 2)) {
- usage();
+ loadServerConfig(configfile,options);
+ sdsfree(options);
} else {
redisLog(REDIS_WARNING,"Warning: no config file specified, using the default config. In order to specify a config file use 'redis-server /path/to/redis.conf'");
}
if (server.daemonize) daemonize();
initServer();
- redisLog(REDIS_NOTICE,"Server started, Redis version " REDIS_VERSION);
+ if (server.daemonize) createPidFile();
+ redisAsciiArt();
+ redisLog(REDIS_WARNING,"Server started, Redis version " REDIS_VERSION);
#ifdef __linux__
linuxOvercommitMemoryWarning();
#endif
- start = time(NULL);
- if (server.appendonly) {
- if (loadAppendOnlyFile(server.appendfilename) == REDIS_OK)
- redisLog(REDIS_NOTICE,"DB loaded from append only file: %ld seconds",time(NULL)-start);
+ start = ustime();
+ if (server.aof_state == REDIS_AOF_ON) {
+ if (loadAppendOnlyFile(server.aof_filename) == REDIS_OK)
+ redisLog(REDIS_NOTICE,"DB loaded from append only file: %.3f seconds",(float)(ustime()-start)/1000000);
} else {
- if (rdbLoad(server.dbfilename) == REDIS_OK)
- redisLog(REDIS_NOTICE,"DB loaded from disk: %ld seconds",time(NULL)-start);
+ if (rdbLoad(server.rdb_filename) == REDIS_OK) {
+ redisLog(REDIS_NOTICE,"DB loaded from disk: %.3f seconds",
+ (float)(ustime()-start)/1000000);
+ } else if (errno != ENOENT) {
+ redisLog(REDIS_WARNING,"Fatal error loading the DB. Exiting.");
+ exit(1);
+ }
}
- redisLog(REDIS_NOTICE,"The server is now ready to accept connections on port %d", server.port);
+ if (server.ipfd > 0)
+ redisLog(REDIS_NOTICE,"The server is now ready to accept connections on port %d", server.port);
+ if (server.sofd > 0)
+ redisLog(REDIS_NOTICE,"The server is now ready to accept connections at %s", server.unixsocket);
aeSetBeforeSleepProc(server.el,beforeSleep);
aeMain(server.el);
aeDeleteEventLoop(server.el);
return 0;
}
-/* ============================= Backtrace support ========================= */
-
-#ifdef HAVE_BACKTRACE
-void *getMcontextEip(ucontext_t *uc) {
-#if defined(__FreeBSD__)
- return (void*) uc->uc_mcontext.mc_eip;
-#elif defined(__dietlibc__)
- return (void*) uc->uc_mcontext.eip;
-#elif defined(__APPLE__) && !defined(MAC_OS_X_VERSION_10_6)
- #if __x86_64__
- return (void*) uc->uc_mcontext->__ss.__rip;
- #else
- return (void*) uc->uc_mcontext->__ss.__eip;
- #endif
-#elif defined(__APPLE__) && defined(MAC_OS_X_VERSION_10_6)
- #if defined(_STRUCT_X86_THREAD_STATE64) && !defined(__i386__)
- return (void*) uc->uc_mcontext->__ss.__rip;
- #else
- return (void*) uc->uc_mcontext->__ss.__eip;
- #endif
-#elif defined(__i386__)
- return (void*) uc->uc_mcontext.gregs[14]; /* Linux 32 */
-#elif defined(__X86_64__) || defined(__x86_64__)
- return (void*) uc->uc_mcontext.gregs[16]; /* Linux 64 */
-#elif defined(__ia64__) /* Linux IA64 */
- return (void*) uc->uc_mcontext.sc_ip;
-#else
- return NULL;
-#endif
-}
-
-void segvHandler(int sig, siginfo_t *info, void *secret) {
- void *trace[100];
- char **messages = NULL;
- int i, trace_size = 0;
- ucontext_t *uc = (ucontext_t*) secret;
- sds infostring;
- REDIS_NOTUSED(info);
-
- redisLog(REDIS_WARNING,
- "======= Ooops! Redis %s got signal: -%d- =======", REDIS_VERSION, sig);
- infostring = genRedisInfoString();
- redisLog(REDIS_WARNING, "%s",infostring);
- /* It's not safe to sdsfree() the returned string under memory
- * corruption conditions. Let it leak as we are going to abort */
-
- trace_size = backtrace(trace, 100);
- /* overwrite sigaction with caller's address */
- if (getMcontextEip(uc) != NULL) {
- trace[1] = getMcontextEip(uc);
- }
- messages = backtrace_symbols(trace, trace_size);
-
- for (i=1; i<trace_size; ++i)
- redisLog(REDIS_WARNING,"%s", messages[i]);
-
- /* free(messages); Don't call free() with possibly corrupted memory. */
- _exit(0);
-}
-
-void sigtermHandler(int sig) {
- REDIS_NOTUSED(sig);
-
- redisLog(REDIS_WARNING,"SIGTERM received, scheduling shutting down...");
- server.shutdown_asap = 1;
-}
-
-void setupSigSegvAction(void) {
- struct sigaction act;
-
- sigemptyset (&act.sa_mask);
- /* When the SA_SIGINFO flag is set in sa_flags then sa_sigaction
- * is used. Otherwise, sa_handler is used */
- act.sa_flags = SA_NODEFER | SA_ONSTACK | SA_RESETHAND | SA_SIGINFO;
- act.sa_sigaction = segvHandler;
- sigaction (SIGSEGV, &act, NULL);
- sigaction (SIGBUS, &act, NULL);
- sigaction (SIGFPE, &act, NULL);
- sigaction (SIGILL, &act, NULL);
- sigaction (SIGBUS, &act, NULL);
-
- act.sa_flags = SA_NODEFER | SA_ONSTACK | SA_RESETHAND;
- act.sa_handler = sigtermHandler;
- sigaction (SIGTERM, &act, NULL);
- return;
-}
-
-#else /* HAVE_BACKTRACE */
-void setupSigSegvAction(void) {
-}
-#endif /* HAVE_BACKTRACE */
-
/* The End */
projects / redis.git / blobdiff