#include "slowlog.h"
#include "bio.h"
-#ifdef HAVE_BACKTRACE
-#include <execinfo.h>
-#include <ucontext.h>
-#endif /* HAVE_BACKTRACE */
-
#include <time.h>
#include <signal.h>
#include <sys/wait.h>
* 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. */
+ * results. For instance SPOP and RANDOMKEY are two random commands.
+ * S: Sort command output array if called from script, so that the output
+ * is deterministic.
+ */
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},
{"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},
+ {"sinter",sinterCommand,-2,"rS",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},
+ {"sunion",sunionCommand,-2,"rS",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},
+ {"sdiff",sdiffCommand,-2,"rS",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},
+ {"smembers",sinterCommand,2,"rS",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},
{"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},
+ {"hkeys",hkeysCommand,2,"rS",0,NULL,1,1,1,0,0},
+ {"hvals",hvalsCommand,2,"rS",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},
{"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},
+ {"keys",keysCommand,2,"rS",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},
{"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},
+ {"sort",sortCommand,-2,"wmS",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},
{"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}
+ {"script",scriptCommand,-2,"ras",0,NULL,0,0,0,0,0},
+ {"time",timeCommand,1,"rR",0,NULL,0,0,0,0,0}
};
/*============================ Utility functions ============================ */
* 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();
* 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();
}
/* Start a scheduled AOF rewrite if this was requested by the user while
* a BGSAVE was in progress. */
- if (server.bgsavechildpid == -1 && server.bgrewritechildpid == -1 &&
- server.aofrewrite_scheduled)
+ 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.bgsavechildpid != -1 || server.bgrewritechildpid != -1) {
+ if (server.rdb_child_pid != -1 || server.aof_child_pid != -1) {
int statloc;
pid_t pid;
if (WIFSIGNALED(statloc)) bysignal = WTERMSIG(statloc);
- if (pid == server.bgsavechildpid) {
+ if (pid == server.rdb_child_pid) {
backgroundSaveDoneHandler(exitcode,bysignal);
} else {
backgroundRewriteDoneHandler(exitcode,bysignal);
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.bgsavechildpid == -1 &&
- server.bgrewritechildpid == -1 &&
- server.auto_aofrewrite_perc &&
- server.appendonly_current_size > server.auto_aofrewrite_min_size)
+ 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.auto_aofrewrite_base_size ?
- server.auto_aofrewrite_base_size : 1;
- long long growth = (server.appendonly_current_size*100/base) - 100;
- if (growth >= server.auto_aofrewrite_perc) {
+ 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();
}
* in order to guarantee a strict consistency. */
if (server.masterhost == NULL) activeExpireCycle();
+ /* Close clients that need to be closed asynchronous */
+ freeClientsInAsyncFreeQueue();
+
/* Replication cron function -- used to reconnect to master and
* to detect transfer failures. */
if (!(loops % 10)) replicationCron();
c->flags &= ~REDIS_UNBLOCKED;
/* Process remaining data in the input buffer. */
- if (c->querybuf && sdslen(c->querybuf) > 0)
+ if (c->querybuf && sdslen(c->querybuf) > 0) {
+ server.current_client = c;
processInputBuffer(c);
+ server.current_client = NULL;
+ }
}
/* Write the AOF buffer on disk */
"-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.bgsaveerr = createObject(REDIS_STRING,sdsnew(
+ "-MISCONF Redis is configured to save RDB snapshots, but is currently not able to persist on disk. Write commands are disabled. Please check Redis logs for details about the error.\r\n"));
shared.space = createObject(REDIS_STRING,sdsnew(" "));
shared.colon = createObject(REDIS_STRING,sdsnew(":"));
shared.plus = createObject(REDIS_STRING,sdsnew("+"));
shared.unsubscribebulk = createStringObject("$11\r\nunsubscribe\r\n",18);
shared.psubscribebulk = createStringObject("$10\r\npsubscribe\r\n",17);
shared.punsubscribebulk = createStringObject("$12\r\npunsubscribe\r\n",19);
- shared.mbulk3 = createStringObject("*3\r\n",4);
- shared.mbulk4 = createStringObject("*4\r\n",4);
+ shared.del = createStringObject("DEL",3);
+ shared.rpop = createStringObject("RPOP",4);
+ shared.lpop = createStringObject("LPOP",4);
for (j = 0; j < REDIS_SHARED_INTEGERS; j++) {
shared.integers[j] = createObject(REDIS_STRING,(void*)(long)j);
shared.integers[j]->encoding = REDIS_ENCODING_INT;
}
+ for (j = 0; j < REDIS_SHARED_BULKHDR_LEN; j++) {
+ shared.mbulkhdr[j] = createObject(REDIS_STRING,
+ sdscatprintf(sdsempty(),"*%d\r\n",j));
+ shared.bulkhdr[j] = createObject(REDIS_STRING,
+ sdscatprintf(sdsempty(),"$%d\r\n",j));
+ }
}
void initServerConfig() {
+ server.arch_bits = (sizeof(long) == 8) ? 64 : 32;
server.port = REDIS_SERVERPORT;
server.bindaddr = NULL;
server.unixsocket = NULL;
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.auto_aofrewrite_perc = REDIS_AUTO_AOFREWRITE_PERC;
- server.auto_aofrewrite_min_size = REDIS_AUTO_AOFREWRITE_MIN_SIZE;
- server.auto_aofrewrite_base_size = 0;
- server.aofrewrite_scheduled = 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 = REDIS_MAX_CLIENTS;
server.bpop_blocked_clients = 0;
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;
+ /* Client output buffer limits */
+ server.client_obuf_limits[REDIS_CLIENT_LIMIT_CLASS_NORMAL].hard_limit_bytes = 0;
+ server.client_obuf_limits[REDIS_CLIENT_LIMIT_CLASS_NORMAL].soft_limit_bytes = 0;
+ server.client_obuf_limits[REDIS_CLIENT_LIMIT_CLASS_NORMAL].soft_limit_seconds = 0;
+ server.client_obuf_limits[REDIS_CLIENT_LIMIT_CLASS_SLAVE].hard_limit_bytes = 1024*1024*256;
+ server.client_obuf_limits[REDIS_CLIENT_LIMIT_CLASS_SLAVE].soft_limit_bytes = 1024*1024*64;
+ server.client_obuf_limits[REDIS_CLIENT_LIMIT_CLASS_SLAVE].soft_limit_seconds = 60;
+ server.client_obuf_limits[REDIS_CLIENT_LIMIT_CLASS_PUBSUB].hard_limit_bytes = 1024*1024*32;
+ server.client_obuf_limits[REDIS_CLIENT_LIMIT_CLASS_PUBSUB].soft_limit_bytes = 1024*1024*8;
+ server.client_obuf_limits[REDIS_CLIENT_LIMIT_CLASS_PUBSUB].soft_limit_seconds = 60;
+
/* Double constants initialization */
R_Zero = 0.0;
R_PosInf = 1.0/R_Zero;
populateCommandTable();
server.delCommand = lookupCommandByCString("del");
server.multiCommand = lookupCommandByCString("multi");
+ server.lpushCommand = lookupCommandByCString("lpush");
/* Slow log */
server.slowlog_log_slower_than = REDIS_SLOWLOG_LOG_SLOWER_THAN;
server.syslog_facility);
}
+ server.current_client = NULL;
server.clients = listCreate();
+ server.clients_to_close = listCreate();
server.slaves = listCreate();
server.monitors = listCreate();
server.unblocked_clients = listCreate();
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_fork_time = 0;
server.stat_rejected_conn = 0;
server.unixtime = time(NULL);
+ server.lastbgsave_status = REDIS_OK;
aeCreateTimeEvent(server.el, 1, serverCron, NULL, NULL);
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.appendonly) {
- server.appendfd = open(server.appendfilename,O_WRONLY|O_APPEND|O_CREAT,0644);
- if (server.appendfd == -1) {
+ 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);
}
}
+ /* 32 bit instances are limited to 4GB of address space, so if there is
+ * no explicit limit in the user provided configuration we set a limit
+ * at 3.5GB using maxmemory with 'noeviction' policy'. This saves
+ * useless crashes of the Redis instance. */
+ if (server.arch_bits == 32 && server.maxmemory == 0) {
+ redisLog(REDIS_WARNING,"Warning: 32 bit instance detected but no memory limit set. Setting 3.5 GB maxmemory limit with 'noeviction' policy now.");
+ server.maxmemory = 3584LL*(1024*1024); /* 3584 MB = 3.5 GB */
+ server.maxmemory_policy = REDIS_MAXMEMORY_NO_EVICTION;
+ }
+
if (server.cluster_enabled) clusterInit();
scriptingInit();
slowlogInit();
bioInit();
- srand(time(NULL)^getpid());
-
}
/* Populates the Redis Command Table starting from the hard coded list
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;
+ case 'S': c->flags |= REDIS_CMD_SORT_FOR_SCRIPT; break;
default: redisPanic("Unsupported command flag"); break;
}
f++;
}
}
+/* ========================== Redis OP Array API ============================ */
+
+void redisOpArrayInit(redisOpArray *oa) {
+ oa->ops = NULL;
+ oa->numops = 0;
+}
+
+int redisOpArrayAppend(redisOpArray *oa, struct redisCommand *cmd, int dbid,
+ robj **argv, int argc, int target)
+{
+ redisOp *op;
+
+ oa->ops = zrealloc(oa->ops,sizeof(redisOp)*(oa->numops+1));
+ op = oa->ops+oa->numops;
+ op->cmd = cmd;
+ op->dbid = dbid;
+ op->argv = argv;
+ op->argc = argc;
+ op->target = target;
+ oa->numops++;
+ return oa->numops;
+}
+
+void redisOpArrayFree(redisOpArray *oa) {
+ while(oa->numops) {
+ int j;
+ redisOp *op;
+
+ oa->numops--;
+ op = oa->ops+oa->numops;
+ for (j = 0; j < op->argc; j++)
+ decrRefCount(op->argv[j]);
+ zfree(op->argv);
+ }
+ zfree(oa->ops);
+}
+
/* ====================== Commands lookup and execution ===================== */
struct redisCommand *lookupCommand(sds name) {
return cmd;
}
+/* Propagate the specified command (in the context of the specified database id)
+ * to AOF, Slaves and Monitors.
+ *
+ * flags are an xor between:
+ * + REDIS_PROPAGATE_NONE (no propagation of command at all)
+ * + REDIS_PROPAGATE_AOF (propagate into the AOF file if is enabled)
+ * + REDIS_PROPAGATE_REPL (propagate into the replication link)
+ */
+void propagate(struct redisCommand *cmd, int dbid, robj **argv, int argc,
+ int flags)
+{
+ if (server.aof_state != REDIS_AOF_OFF && flags & REDIS_PROPAGATE_AOF)
+ feedAppendOnlyFile(cmd,dbid,argv,argc);
+ if (flags & REDIS_PROPAGATE_REPL && listLength(server.slaves))
+ replicationFeedSlaves(server.slaves,dbid,argv,argc);
+}
+
+/* Used inside commands to schedule the propagation of additional commands
+ * after the current command is propagated to AOF / Replication. */
+void alsoPropagate(struct redisCommand *cmd, int dbid, robj **argv, int argc,
+ int target)
+{
+ redisOpArrayAppend(&server.also_propagate,cmd,dbid,argv,argc,target);
+}
+
/* Call() is the core of Redis execution of a command */
-void call(redisClient *c) {
+void call(redisClient *c, int flags) {
long long dirty, start = ustime(), duration;
+ /* Sent the command to clients in MONITOR mode, only if the commands are
+ * not geneated from reading an AOF. */
+ if (listLength(server.monitors) && !server.loading)
+ replicationFeedMonitors(c,server.monitors,c->db->id,c->argv,c->argc);
+
+ /* Call the command. */
+ redisOpArrayInit(&server.also_propagate);
dirty = server.dirty;
c->cmd->proc(c);
dirty = server.dirty-dirty;
duration = ustime()-start;
- c->cmd->microseconds += duration;
- slowlogPushEntryIfNeeded(c->argv,c->argc,duration);
- c->cmd->calls++;
-
- if (server.appendonly && 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))
- replicationFeedMonitors(server.monitors,c->db->id,c->argv,c->argc);
+
+ /* When EVAL is called loading the AOF we don't want commands called
+ * from Lua to go into the slowlog or to populate statistics. */
+ if (server.loading && c->flags & REDIS_LUA_CLIENT)
+ flags &= ~(REDIS_CALL_SLOWLOG | REDIS_CALL_STATS);
+
+ /* Log the command into the Slow log if needed, and populate the
+ * per-command statistics that we show in INFO commandstats. */
+ if (flags & REDIS_CALL_SLOWLOG)
+ slowlogPushEntryIfNeeded(c->argv,c->argc,duration);
+ if (flags & REDIS_CALL_STATS) {
+ c->cmd->microseconds += duration;
+ c->cmd->calls++;
+ }
+
+ /* Propagate the command into the AOF and replication link */
+ if (flags & REDIS_CALL_PROPAGATE) {
+ int flags = REDIS_PROPAGATE_NONE;
+
+ if (c->cmd->flags & REDIS_CMD_FORCE_REPLICATION)
+ flags |= REDIS_PROPAGATE_REPL;
+ if (dirty)
+ flags |= (REDIS_PROPAGATE_REPL | REDIS_PROPAGATE_AOF);
+ if (flags != REDIS_PROPAGATE_NONE)
+ propagate(c->cmd,c->db->id,c->argv,c->argc,flags);
+ }
+ /* Commands such as LPUSH or BRPOPLPUSH may propagate an additional
+ * PUSH command. */
+ if (server.also_propagate.numops) {
+ int j;
+ redisOp *rop;
+
+ for (j = 0; j < server.also_propagate.numops; j++) {
+ rop = &server.also_propagate.ops[j];
+ propagate(rop->cmd, rop->dbid, rop->argv, rop->argc, rop->target);
+ }
+ redisOpArrayFree(&server.also_propagate);
+ }
server.stat_numcommands++;
}
* 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)
+ if (server.maxmemory) {
+ int retval = freeMemoryIfNeeded();
+ if ((c->cmd->flags & REDIS_CMD_DENYOOM) && retval == REDIS_ERR) {
+ addReplyError(c,
+ "command not allowed when used memory > 'maxmemory'");
+ return REDIS_OK;
+ }
+ }
+
+ /* Don't accept write commands if there are problems persisting on disk. */
+ if (server.saveparamslen > 0 && server.lastbgsave_status == REDIS_ERR &&
+ c->cmd->flags & REDIS_CMD_WRITE)
{
- addReplyError(c,"command not allowed when used memory > 'maxmemory'");
+ addReply(c, shared.bgsaveerr);
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.replstate != REDIS_REPL_CONNECTED &&
+ if (server.masterhost && server.repl_state != REDIS_REPL_CONNECTED &&
server.repl_serve_stale_data == 0 &&
c->cmd->proc != infoCommand && c->cmd->proc != slaveofCommand)
{
queueMultiCommand(c);
addReply(c,shared.queued);
} else {
- call(c);
+ call(c,REDIS_CALL_FULL);
}
return REDIS_OK;
}
/* 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) {
+ if (server.rdb_child_pid != -1) {
redisLog(REDIS_WARNING,"There is a child saving an .rdb. Killing it!");
- kill(server.bgsavechildpid,SIGKILL);
- rdbRemoveTempFile(server.bgsavechildpid);
+ 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.bgrewritechildpid != -1) {
+ if (server.aof_child_pid != -1) {
redisLog(REDIS_WARNING,
"There is a child rewriting the AOF. Killing it!");
- kill(server.bgrewritechildpid,SIGKILL);
+ kill(server.aof_child_pid,SIGKILL);
}
/* Append only file: fsync() the AOF and exit */
redisLog(REDIS_NOTICE,"Calling fsync() on the AOF file.");
- aof_fsync(server.appendfd);
+ 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 (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
addReplyBulk(c,c->argv[1]);
}
+void timeCommand(redisClient *c) {
+ struct timeval tv;
+
+ /* gettimeofday() can only fail if &tv is a bad addresss so we
+ * don't check for errors. */
+ gettimeofday(&tv,NULL);
+ addReplyMultiBulkLen(c,2);
+ addReplyBulkLongLong(c,tv.tv_sec);
+ addReplyBulkLongLong(c,tv.tv_usec);
+}
+
/* Convert an amount of bytes into a human readable string in the form
* of 100B, 2G, 100M, 4K, and so forth. */
void bytesToHuman(char *s, unsigned long long n) {
"redis_version:%s\r\n"
"redis_git_sha1:%s\r\n"
"redis_git_dirty:%d\r\n"
- "arch_bits:%s\r\n"
+ "arch_bits:%d\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"
REDIS_VERSION,
redisGitSHA1(),
strtol(redisGitDirty(),NULL,10) > 0,
- (sizeof(long) == 8) ? "64" : "32",
+ server.arch_bits,
aeGetApiName(),
+#ifdef __GNUC__
+ __GNUC__,__GNUC_MINOR__,__GNUC_PATCHLEVEL__,
+#else
+ 0,0,0,
+#endif
(long) getpid(),
server.port,
uptime,
if (sections++) info = sdscat(info,"\r\n");
info = sdscatprintf(info,
"# Clients\r\n"
- "connected_clients:%d\r\n"
+ "connected_clients:%lu\r\n"
"client_longest_output_list:%lu\r\n"
"client_biggest_input_buf:%lu\r\n"
"blocked_clients:%d\r\n",
"changes_since_last_save:%lld\r\n"
"bgsave_in_progress:%d\r\n"
"last_save_time:%ld\r\n"
+ "last_bgsave_status:%s\r\n"
"bgrewriteaof_in_progress:%d\r\n",
server.loading,
- server.appendonly,
+ server.aof_state != REDIS_AOF_OFF,
server.dirty,
- server.bgsavechildpid != -1,
+ server.rdb_child_pid != -1,
server.lastsave,
- server.bgrewritechildpid != -1);
+ server.lastbgsave_status == REDIS_OK ? "ok" : "err",
+ server.aof_child_pid != -1);
- if (server.appendonly) {
+ 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.appendonly_current_size,
- (long long) server.auto_aofrewrite_base_size,
- server.aofrewrite_scheduled,
- sdslen(server.aofbuf),
+ (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));
}
"keyspace_hits:%lld\r\n"
"keyspace_misses:%lld\r\n"
"pubsub_channels:%ld\r\n"
- "pubsub_patterns:%u\r\n"
+ "pubsub_patterns:%lu\r\n"
"latest_fork_usec:%lld\r\n",
server.stat_numconnections,
server.stat_numcommands,
"master_sync_in_progress:%d\r\n"
,server.masterhost,
server.masterport,
- (server.replstate == REDIS_REPL_CONNECTED) ?
+ (server.repl_state == REDIS_REPL_CONNECTED) ?
"up" : "down",
server.master ?
((int)(time(NULL)-server.master->lastinteraction)) : -1,
- server.replstate == REDIS_REPL_TRANSFER
+ server.repl_state == REDIS_REPL_TRANSFER
);
- if (server.replstate == 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"
);
}
- if (server.replstate != REDIS_REPL_CONNECTED) {
+ 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",
+ "connected_slaves:%lu\r\n",
listLength(server.slaves));
if (listLength(server.slaves)) {
int slaveid = 0;
/* ============================ Maxmemory directive ======================== */
/* 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:
+ * the max memory used by the server, before processing a command.
+ *
+ * The goal of the function is to free enough memory to keep Redis under the
+ * configured memory limit.
*
- * - Free objects from the free list
- * - Try to remove keys with an EXPIRE set
+ * The function starts calculating how many bytes should be freed to keep
+ * Redis under the limit, and enters a loop selecting the best keys to
+ * evict accordingly to the configured policy.
*
- * It is not possible to free enough memory to reach used-memory < maxmemory
- * the server will start refusing commands that will enlarge even more the
- * memory usage.
+ * If all the bytes needed to return back under the limit were freed the
+ * function returns REDIS_OK, otherwise REDIS_ERR is returned, and the caller
+ * should block the execution of commands that will result in more memory
+ * used by the server.
*/
-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;
+int freeMemoryIfNeeded(void) {
+ size_t mem_used, mem_tofree, mem_freed;
+ int slaves = listLength(server.slaves);
+
+ /* Remove the size of slaves output buffers and AOF buffer from the
+ * count of used memory. */
+ mem_used = zmalloc_used_memory();
+ if (slaves) {
+ listIter li;
+ listNode *ln;
+
+ listRewind(server.slaves,&li);
+ while((ln = listNext(&li))) {
+ redisClient *slave = listNodeValue(ln);
+ unsigned long obuf_bytes = getClientOutputBufferMemoryUsage(slave);
+ if (obuf_bytes > mem_used)
+ mem_used = 0;
+ else
+ mem_used -= obuf_bytes;
+ }
+ }
+ if (server.aof_state != REDIS_AOF_OFF) {
+ mem_used -= sdslen(server.aof_buf);
+ mem_used -= sdslen(server.aof_rewrite_buf);
+ }
+
+ /* Check if we are over the memory limit. */
+ if (mem_used <= server.maxmemory) return REDIS_OK;
- while (server.maxmemory && zmalloc_used_memory() > server.maxmemory) {
- int j, k, freed = 0;
+ if (server.maxmemory_policy == REDIS_MAXMEMORY_NO_EVICTION)
+ return REDIS_ERR; /* We need to free memory, but policy forbids. */
+
+ /* Compute how much memory we need to free. */
+ mem_tofree = mem_used - server.maxmemory;
+ mem_freed = 0;
+ while (mem_freed < mem_tofree) {
+ int j, k, keys_freed = 0;
for (j = 0; j < server.dbnum; j++) {
long bestval = 0; /* just to prevent warning */
/* Finally remove the selected key. */
if (bestkey) {
+ long long delta;
+
robj *keyobj = createStringObject(bestkey,sdslen(bestkey));
propagateExpire(db,keyobj);
+ /* We compute the amount of memory freed by dbDelete() alone.
+ * It is possible that actually the memory needed to propagate
+ * the DEL in AOF and replication link is greater than the one
+ * we are freeing removing the key, but we can't account for
+ * that otherwise we would never exit the loop.
+ *
+ * AOF and Output buffer memory will be freed eventually so
+ * we only care about memory used by the key space. */
+ delta = (long long) zmalloc_used_memory();
dbDelete(db,keyobj);
+ delta -= (long long) zmalloc_used_memory();
+ mem_freed += delta;
server.stat_evictedkeys++;
decrRefCount(keyobj);
- freed++;
+ keys_freed++;
+
+ /* When the memory to free starts to be big enough, we may
+ * start spending so much time here that is impossible to
+ * deliver data to the slaves fast enough, so we force the
+ * transmission here inside the loop. */
+ if (slaves) flushSlavesOutputBuffers();
}
}
- if (!freed) return; /* nothing to free... */
+ if (!keys_freed) return REDIS_ERR; /* nothing to free... */
}
+ return REDIS_OK;
}
/* =================================== Main! ================================ */
zfree(buf);
}
-#ifdef HAVE_BACKTRACE
-static 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;
- #elif __i386__
- return (void*) uc->uc_mcontext->__ss.__eip;
- #else
- return (void*) uc->uc_mcontext->__ss.__srr0;
- #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 bugReportStart(void) {
- if (server.bug_report_start == 0) {
- redisLog(REDIS_WARNING,
- "=== REDIS BUG REPORT START: Cut & paste starting from here ===");
- server.bug_report_start = 1;
- }
-}
-
-static void sigsegvHandler(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, clients;
- struct sigaction act;
- REDIS_NOTUSED(info);
-
- bugReportStart();
- redisLog(REDIS_WARNING,
- " Redis %s crashed by signal: %d", REDIS_VERSION, sig);
- redisLog(REDIS_WARNING,
- " Failed assertion: %s (%s:%d)", server.assert_failed,
- server.assert_file, server.assert_line);
-
- /* Generate the stack trace */
- 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);
- redisLog(REDIS_WARNING, "--- STACK TRACE");
- for (i=1; i<trace_size; ++i)
- redisLog(REDIS_WARNING,"%s", messages[i]);
-
- /* Log INFO and CLIENT LIST */
- redisLog(REDIS_WARNING, "--- INFO OUTPUT");
- infostring = genRedisInfoString("all");
- redisLogRaw(REDIS_WARNING, infostring);
- redisLog(REDIS_WARNING, "--- CLIENT LIST OUTPUT");
- clients = getAllClientsInfoString();
- redisLogRaw(REDIS_WARNING, clients);
- /* Don't sdsfree() strings to avoid a crash. Memory may be corrupted. */
-
- redisLog(REDIS_WARNING,
-"=== REDIS BUG REPORT END. Make sure to include from START to END. ===\n\n"
-" Please report the crash opening an issue on github:\n\n"
-" http://github.com/antirez/redis/issues\n\n"
-);
- /* free(messages); Don't call free() with possibly corrupted memory. */
- if (server.daemonize) unlink(server.pidfile);
-
- /* Make sure we exit with the right signal at the end. So for instance
- * the core will be dumped if enabled. */
- 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;
- act.sa_handler = SIG_DFL;
- sigaction (sig, &act, NULL);
- kill(getpid(),sig);
-}
-#endif /* HAVE_BACKTRACE */
-
static void sigtermHandler(int sig) {
REDIS_NOTUSED(sig);
int main(int argc, char **argv) {
long long start;
+ struct timeval tv;
+ /* We need to initialize our libraries, and the server configuration. */
zmalloc_enable_thread_safeness();
+ srand(time(NULL)^getpid());
+ gettimeofday(&tv,NULL);
+ dictSetHashFunctionSeed(tv.tv_sec^tv.tv_usec^getpid());
initServerConfig();
+
if (argc >= 2) {
int j = 1; /* First option to parse in argv[] */
sds options = sdsempty();
linuxOvercommitMemoryWarning();
#endif
start = ustime();
- if (server.appendonly) {
- if (loadAppendOnlyFile(server.appendfilename) == REDIS_OK)
+ 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) {
+ if (rdbLoad(server.rdb_filename) == REDIS_OK) {
redisLog(REDIS_NOTICE,"DB loaded from disk: %.3f seconds",
(float)(ustime()-start)/1000000);
} else if (errno != ENOENT) {
projects / redis.git / blobdiff