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Merge branch 'unstable'
[redis.git] / src / redis.c
diff --git a/src/redis.c b/src/redis.c
index 99ff1898b4483e7e4574c7c6be1440caabc34ed8..63b41ba841a0467f2057f3845e84880efdffeb2b 100644 (file)
--- a/src/redis.c
+++ b/src/redis.c
@@ -68,147 +68,179 @@ double R_Zero, R_PosInf, R_NegInf, R_Nan;
 /* Global vars */
 struct redisServer server; /* server global state */
 struct redisCommand *commandTable;
 /* Global vars */
 struct redisServer server; /* server global state */
 struct redisCommand *commandTable;
-struct redisCommand readonlyCommandTable[] = {
-    {"get",getCommand,2,0,NULL,1,1,1},
-    {"set",setCommand,3,REDIS_CMD_DENYOOM,NULL,0,0,0},
-    {"setnx",setnxCommand,3,REDIS_CMD_DENYOOM,NULL,0,0,0},
-    {"setex",setexCommand,4,REDIS_CMD_DENYOOM,NULL,0,0,0},
-    {"append",appendCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1},
-    {"substr",substrCommand,4,0,NULL,1,1,1},
-    {"strlen",strlenCommand,2,0,NULL,1,1,1},
-    {"del",delCommand,-2,0,NULL,0,0,0},
-    {"exists",existsCommand,2,0,NULL,1,1,1},
-    {"incr",incrCommand,2,REDIS_CMD_DENYOOM,NULL,1,1,1},
-    {"decr",decrCommand,2,REDIS_CMD_DENYOOM,NULL,1,1,1},
-    {"mget",mgetCommand,-2,0,NULL,1,-1,1},
-    {"rpush",rpushCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1},
-    {"lpush",lpushCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1},
-    {"rpushx",rpushxCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1},
-    {"lpushx",lpushxCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1},
-    {"linsert",linsertCommand,5,REDIS_CMD_DENYOOM,NULL,1,1,1},
-    {"rpop",rpopCommand,2,0,NULL,1,1,1},
-    {"lpop",lpopCommand,2,0,NULL,1,1,1},
-    {"brpop",brpopCommand,-3,0,NULL,1,1,1},
-    {"blpop",blpopCommand,-3,0,NULL,1,1,1},
-    {"llen",llenCommand,2,0,NULL,1,1,1},
-    {"lindex",lindexCommand,3,0,NULL,1,1,1},
-    {"lset",lsetCommand,4,REDIS_CMD_DENYOOM,NULL,1,1,1},
-    {"lrange",lrangeCommand,4,0,NULL,1,1,1},
-    {"ltrim",ltrimCommand,4,0,NULL,1,1,1},
-    {"lrem",lremCommand,4,0,NULL,1,1,1},
-    {"rpoplpush",rpoplpushcommand,3,REDIS_CMD_DENYOOM,NULL,1,2,1},
-    {"sadd",saddCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1},
-    {"srem",sremCommand,3,0,NULL,1,1,1},
-    {"smove",smoveCommand,4,0,NULL,1,2,1},
-    {"sismember",sismemberCommand,3,0,NULL,1,1,1},
-    {"scard",scardCommand,2,0,NULL,1,1,1},
-    {"spop",spopCommand,2,0,NULL,1,1,1},
-    {"srandmember",srandmemberCommand,2,0,NULL,1,1,1},
-    {"sinter",sinterCommand,-2,REDIS_CMD_DENYOOM,NULL,1,-1,1},
-    {"sinterstore",sinterstoreCommand,-3,REDIS_CMD_DENYOOM,NULL,2,-1,1},
-    {"sunion",sunionCommand,-2,REDIS_CMD_DENYOOM,NULL,1,-1,1},
-    {"sunionstore",sunionstoreCommand,-3,REDIS_CMD_DENYOOM,NULL,2,-1,1},
-    {"sdiff",sdiffCommand,-2,REDIS_CMD_DENYOOM,NULL,1,-1,1},
-    {"sdiffstore",sdiffstoreCommand,-3,REDIS_CMD_DENYOOM,NULL,2,-1,1},
-    {"smembers",sinterCommand,2,0,NULL,1,1,1},
-    {"zadd",zaddCommand,4,REDIS_CMD_DENYOOM,NULL,1,1,1},
-    {"zincrby",zincrbyCommand,4,REDIS_CMD_DENYOOM,NULL,1,1,1},
-    {"zrem",zremCommand,3,0,NULL,1,1,1},
-    {"zremrangebyscore",zremrangebyscoreCommand,4,0,NULL,1,1,1},
-    {"zremrangebyrank",zremrangebyrankCommand,4,0,NULL,1,1,1},
-    {"zunionstore",zunionstoreCommand,-4,REDIS_CMD_DENYOOM,zunionInterBlockClientOnSwappedKeys,0,0,0},
-    {"zinterstore",zinterstoreCommand,-4,REDIS_CMD_DENYOOM,zunionInterBlockClientOnSwappedKeys,0,0,0},
-    {"zrange",zrangeCommand,-4,0,NULL,1,1,1},
-    {"zrangebyscore",zrangebyscoreCommand,-4,0,NULL,1,1,1},
-    {"zrevrangebyscore",zrevrangebyscoreCommand,-4,0,NULL,1,1,1},
-    {"zcount",zcountCommand,4,0,NULL,1,1,1},
-    {"zrevrange",zrevrangeCommand,-4,0,NULL,1,1,1},
-    {"zcard",zcardCommand,2,0,NULL,1,1,1},
-    {"zscore",zscoreCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1},
-    {"zrank",zrankCommand,3,0,NULL,1,1,1},
-    {"zrevrank",zrevrankCommand,3,0,NULL,1,1,1},
-    {"hset",hsetCommand,4,REDIS_CMD_DENYOOM,NULL,1,1,1},
-    {"hsetnx",hsetnxCommand,4,REDIS_CMD_DENYOOM,NULL,1,1,1},
-    {"hget",hgetCommand,3,0,NULL,1,1,1},
-    {"hmset",hmsetCommand,-4,REDIS_CMD_DENYOOM,NULL,1,1,1},
-    {"hmget",hmgetCommand,-3,0,NULL,1,1,1},
-    {"hincrby",hincrbyCommand,4,REDIS_CMD_DENYOOM,NULL,1,1,1},
-    {"hdel",hdelCommand,3,0,NULL,1,1,1},
-    {"hlen",hlenCommand,2,0,NULL,1,1,1},
-    {"hkeys",hkeysCommand,2,0,NULL,1,1,1},
-    {"hvals",hvalsCommand,2,0,NULL,1,1,1},
-    {"hgetall",hgetallCommand,2,0,NULL,1,1,1},
-    {"hexists",hexistsCommand,3,0,NULL,1,1,1},
-    {"incrby",incrbyCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1},
-    {"decrby",decrbyCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1},
-    {"getset",getsetCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1},
-    {"mset",msetCommand,-3,REDIS_CMD_DENYOOM,NULL,1,-1,2},
-    {"msetnx",msetnxCommand,-3,REDIS_CMD_DENYOOM,NULL,1,-1,2},
-    {"randomkey",randomkeyCommand,1,0,NULL,0,0,0},
-    {"select",selectCommand,2,0,NULL,0,0,0},
-    {"move",moveCommand,3,0,NULL,1,1,1},
-    {"rename",renameCommand,3,0,NULL,1,1,1},
-    {"renamenx",renamenxCommand,3,0,NULL,1,1,1},
-    {"expire",expireCommand,3,0,NULL,0,0,0},
-    {"expireat",expireatCommand,3,0,NULL,0,0,0},
-    {"keys",keysCommand,2,0,NULL,0,0,0},
-    {"dbsize",dbsizeCommand,1,0,NULL,0,0,0},
-    {"auth",authCommand,2,0,NULL,0,0,0},
-    {"ping",pingCommand,1,0,NULL,0,0,0},
-    {"echo",echoCommand,2,0,NULL,0,0,0},
-    {"save",saveCommand,1,0,NULL,0,0,0},
-    {"bgsave",bgsaveCommand,1,0,NULL,0,0,0},
-    {"bgrewriteaof",bgrewriteaofCommand,1,0,NULL,0,0,0},
-    {"shutdown",shutdownCommand,1,0,NULL,0,0,0},
-    {"lastsave",lastsaveCommand,1,0,NULL,0,0,0},
-    {"type",typeCommand,2,0,NULL,1,1,1},
-    {"multi",multiCommand,1,0,NULL,0,0,0},
-    {"exec",execCommand,1,REDIS_CMD_DENYOOM,execBlockClientOnSwappedKeys,0,0,0},
-    {"discard",discardCommand,1,0,NULL,0,0,0},
-    {"sync",syncCommand,1,0,NULL,0,0,0},
-    {"flushdb",flushdbCommand,1,0,NULL,0,0,0},
-    {"flushall",flushallCommand,1,0,NULL,0,0,0},
-    {"sort",sortCommand,-2,REDIS_CMD_DENYOOM,NULL,1,1,1},
-    {"info",infoCommand,1,0,NULL,0,0,0},
-    {"monitor",monitorCommand,1,0,NULL,0,0,0},
-    {"ttl",ttlCommand,2,0,NULL,1,1,1},
-    {"persist",persistCommand,2,0,NULL,1,1,1},
-    {"slaveof",slaveofCommand,3,0,NULL,0,0,0},
-    {"debug",debugCommand,-2,0,NULL,0,0,0},
-    {"config",configCommand,-2,0,NULL,0,0,0},
-    {"subscribe",subscribeCommand,-2,0,NULL,0,0,0},
-    {"unsubscribe",unsubscribeCommand,-1,0,NULL,0,0,0},
-    {"psubscribe",psubscribeCommand,-2,0,NULL,0,0,0},
-    {"punsubscribe",punsubscribeCommand,-1,0,NULL,0,0,0},
-    {"publish",publishCommand,3,REDIS_CMD_FORCE_REPLICATION,NULL,0,0,0},
-    {"watch",watchCommand,-2,0,NULL,0,0,0},
-    {"unwatch",unwatchCommand,1,0,NULL,0,0,0}
+struct redisCommand redisCommandTable[] = {
+    {"get",getCommand,2,0,NULL,1,1,1,0,0},
+    {"set",setCommand,3,REDIS_CMD_DENYOOM,noPreloadGetKeys,1,1,1,0,0},
+    {"setnx",setnxCommand,3,REDIS_CMD_DENYOOM,noPreloadGetKeys,1,1,1,0,0},
+    {"setex",setexCommand,4,REDIS_CMD_DENYOOM,noPreloadGetKeys,2,2,1,0,0},
+    {"append",appendCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0},
+    {"strlen",strlenCommand,2,0,NULL,1,1,1,0,0},
+    {"del",delCommand,-2,0,noPreloadGetKeys,1,-1,1,0,0},
+    {"exists",existsCommand,2,0,NULL,1,1,1,0,0},
+    {"setbit",setbitCommand,4,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0},
+    {"getbit",getbitCommand,3,0,NULL,1,1,1,0,0},
+    {"setrange",setrangeCommand,4,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0},
+    {"getrange",getrangeCommand,4,0,NULL,1,1,1,0,0},
+    {"substr",getrangeCommand,4,0,NULL,1,1,1,0,0},
+    {"incr",incrCommand,2,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0},
+    {"decr",decrCommand,2,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0},
+    {"mget",mgetCommand,-2,0,NULL,1,-1,1,0,0},
+    {"rpush",rpushCommand,-3,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0},
+    {"lpush",lpushCommand,-3,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0},
+    {"rpushx",rpushxCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0},
+    {"lpushx",lpushxCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0},
+    {"linsert",linsertCommand,5,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0},
+    {"rpop",rpopCommand,2,0,NULL,1,1,1,0,0},
+    {"lpop",lpopCommand,2,0,NULL,1,1,1,0,0},
+    {"brpop",brpopCommand,-3,0,NULL,1,1,1,0,0},
+    {"brpoplpush",brpoplpushCommand,4,REDIS_CMD_DENYOOM,NULL,1,2,1,0,0},
+    {"blpop",blpopCommand,-3,0,NULL,1,-2,1,0,0},
+    {"llen",llenCommand,2,0,NULL,1,1,1,0,0},
+    {"lindex",lindexCommand,3,0,NULL,1,1,1,0,0},
+    {"lset",lsetCommand,4,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0},
+    {"lrange",lrangeCommand,4,0,NULL,1,1,1,0,0},
+    {"ltrim",ltrimCommand,4,0,NULL,1,1,1,0,0},
+    {"lrem",lremCommand,4,0,NULL,1,1,1,0,0},
+    {"rpoplpush",rpoplpushCommand,3,REDIS_CMD_DENYOOM,NULL,1,2,1,0,0},
+    {"sadd",saddCommand,-3,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0},
+    {"srem",sremCommand,-3,0,NULL,1,1,1,0,0},
+    {"smove",smoveCommand,4,0,NULL,1,2,1,0,0},
+    {"sismember",sismemberCommand,3,0,NULL,1,1,1,0,0},
+    {"scard",scardCommand,2,0,NULL,1,1,1,0,0},
+    {"spop",spopCommand,2,0,NULL,1,1,1,0,0},
+    {"srandmember",srandmemberCommand,2,0,NULL,1,1,1,0,0},
+    {"sinter",sinterCommand,-2,REDIS_CMD_DENYOOM,NULL,1,-1,1,0,0},
+    {"sinterstore",sinterstoreCommand,-3,REDIS_CMD_DENYOOM,NULL,2,-1,1,0,0},
+    {"sunion",sunionCommand,-2,REDIS_CMD_DENYOOM,NULL,1,-1,1,0,0},
+    {"sunionstore",sunionstoreCommand,-3,REDIS_CMD_DENYOOM,NULL,2,-1,1,0,0},
+    {"sdiff",sdiffCommand,-2,REDIS_CMD_DENYOOM,NULL,1,-1,1,0,0},
+    {"sdiffstore",sdiffstoreCommand,-3,REDIS_CMD_DENYOOM,NULL,2,-1,1,0,0},
+    {"smembers",sinterCommand,2,0,NULL,1,1,1,0,0},
+    {"zadd",zaddCommand,4,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0},
+    {"zincrby",zincrbyCommand,4,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0},
+    {"zrem",zremCommand,3,0,NULL,1,1,1,0,0},
+    {"zremrangebyscore",zremrangebyscoreCommand,4,0,NULL,1,1,1,0,0},
+    {"zremrangebyrank",zremrangebyrankCommand,4,0,NULL,1,1,1,0,0},
+    {"zunionstore",zunionstoreCommand,-4,REDIS_CMD_DENYOOM,zunionInterGetKeys,0,0,0,0,0},
+    {"zinterstore",zinterstoreCommand,-4,REDIS_CMD_DENYOOM,zunionInterGetKeys,0,0,0,0,0},
+    {"zrange",zrangeCommand,-4,0,NULL,1,1,1,0,0},
+    {"zrangebyscore",zrangebyscoreCommand,-4,0,NULL,1,1,1,0,0},
+    {"zrevrangebyscore",zrevrangebyscoreCommand,-4,0,NULL,1,1,1,0,0},
+    {"zcount",zcountCommand,4,0,NULL,1,1,1,0,0},
+    {"zrevrange",zrevrangeCommand,-4,0,NULL,1,1,1,0,0},
+    {"zcard",zcardCommand,2,0,NULL,1,1,1,0,0},
+    {"zscore",zscoreCommand,3,0,NULL,1,1,1,0,0},
+    {"zrank",zrankCommand,3,0,NULL,1,1,1,0,0},
+    {"zrevrank",zrevrankCommand,3,0,NULL,1,1,1,0,0},
+    {"hset",hsetCommand,4,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0},
+    {"hsetnx",hsetnxCommand,4,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0},
+    {"hget",hgetCommand,3,0,NULL,1,1,1,0,0},
+    {"hmset",hmsetCommand,-4,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0},
+    {"hmget",hmgetCommand,-3,0,NULL,1,1,1,0,0},
+    {"hincrby",hincrbyCommand,4,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0},
+    {"hdel",hdelCommand,-3,0,NULL,1,1,1,0,0},
+    {"hlen",hlenCommand,2,0,NULL,1,1,1,0,0},
+    {"hkeys",hkeysCommand,2,0,NULL,1,1,1,0,0},
+    {"hvals",hvalsCommand,2,0,NULL,1,1,1,0,0},
+    {"hgetall",hgetallCommand,2,0,NULL,1,1,1,0,0},
+    {"hexists",hexistsCommand,3,0,NULL,1,1,1,0,0},
+    {"incrby",incrbyCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0},
+    {"decrby",decrbyCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0},
+    {"getset",getsetCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0},
+    {"mset",msetCommand,-3,REDIS_CMD_DENYOOM,NULL,1,-1,2,0,0},
+    {"msetnx",msetnxCommand,-3,REDIS_CMD_DENYOOM,NULL,1,-1,2,0,0},
+    {"randomkey",randomkeyCommand,1,0,NULL,0,0,0,0,0},
+    {"select",selectCommand,2,0,NULL,0,0,0,0,0},
+    {"move",moveCommand,3,0,NULL,1,1,1,0,0},
+    {"rename",renameCommand,3,0,renameGetKeys,1,2,1,0,0},
+    {"renamenx",renamenxCommand,3,0,renameGetKeys,1,2,1,0,0},
+    {"expire",expireCommand,3,0,NULL,1,1,1,0,0},
+    {"expireat",expireatCommand,3,0,NULL,1,1,1,0,0},
+    {"keys",keysCommand,2,0,NULL,0,0,0,0,0},
+    {"dbsize",dbsizeCommand,1,0,NULL,0,0,0,0,0},
+    {"auth",authCommand,2,0,NULL,0,0,0,0,0},
+    {"ping",pingCommand,1,0,NULL,0,0,0,0,0},
+    {"echo",echoCommand,2,0,NULL,0,0,0,0,0},
+    {"save",saveCommand,1,0,NULL,0,0,0,0,0},
+    {"bgsave",bgsaveCommand,1,0,NULL,0,0,0,0,0},
+    {"bgrewriteaof",bgrewriteaofCommand,1,0,NULL,0,0,0,0,0},
+    {"shutdown",shutdownCommand,1,0,NULL,0,0,0,0,0},
+    {"lastsave",lastsaveCommand,1,0,NULL,0,0,0,0,0},
+    {"type",typeCommand,2,0,NULL,1,1,1,0,0},
+    {"multi",multiCommand,1,0,NULL,0,0,0,0,0},
+    {"exec",execCommand,1,REDIS_CMD_DENYOOM,NULL,0,0,0,0,0},
+    {"discard",discardCommand,1,0,NULL,0,0,0,0,0},
+    {"sync",syncCommand,1,0,NULL,0,0,0,0,0},
+    {"flushdb",flushdbCommand,1,0,NULL,0,0,0,0,0},
+    {"flushall",flushallCommand,1,0,NULL,0,0,0,0,0},
+    {"sort",sortCommand,-2,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0},
+    {"info",infoCommand,-1,0,NULL,0,0,0,0,0},
+    {"monitor",monitorCommand,1,0,NULL,0,0,0,0,0},
+    {"ttl",ttlCommand,2,0,NULL,1,1,1,0,0},
+    {"persist",persistCommand,2,0,NULL,1,1,1,0,0},
+    {"slaveof",slaveofCommand,3,0,NULL,0,0,0,0,0},
+    {"debug",debugCommand,-2,0,NULL,0,0,0,0,0},
+    {"config",configCommand,-2,0,NULL,0,0,0,0,0},
+    {"subscribe",subscribeCommand,-2,0,NULL,0,0,0,0,0},
+    {"unsubscribe",unsubscribeCommand,-1,0,NULL,0,0,0,0,0},
+    {"psubscribe",psubscribeCommand,-2,0,NULL,0,0,0,0,0},
+    {"punsubscribe",punsubscribeCommand,-1,0,NULL,0,0,0,0,0},
+    {"publish",publishCommand,3,REDIS_CMD_FORCE_REPLICATION,NULL,0,0,0,0,0},
+    {"watch",watchCommand,-2,0,noPreloadGetKeys,1,-1,1,0,0},
+    {"unwatch",unwatchCommand,1,0,NULL,0,0,0,0,0},
+    {"cluster",clusterCommand,-2,0,NULL,0,0,0,0,0},
+    {"restore",restoreCommand,4,0,NULL,0,0,0,0,0},
+    {"migrate",migrateCommand,6,0,NULL,0,0,0,0,0},
+    {"dump",dumpCommand,2,0,NULL,0,0,0,0,0},
+    {"object",objectCommand,-2,0,NULL,0,0,0,0,0},
+    {"client",clientCommand,-2,0,NULL,0,0,0,0,0}
 };
 
 /*============================ Utility functions ============================ */
 
 };
 
 /*============================ 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;
     FILE *fp;
-    char *c = ".-*#";
     char buf[64];
     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;
 
     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);
     fflush(fp);
-    va_end(ap);
 
     if (server.logfile) fclose(fp);
 
     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
 }
 
 /* Redis generally does not try to recover from out of memory conditions
@@ -222,6 +254,17 @@ void oom(const char *msg) {
     abort();
 }
 
     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;
+}
+
 /*====================== Hash table type implementation  ==================== */
 
 /* This is an hash table type that uses the SDS dynamic strings libary as
 /*====================== Hash table type implementation  ==================== */
 
 /* This is an hash table type that uses the SDS dynamic strings libary as
@@ -252,6 +295,15 @@ int dictSdsKeyCompare(void *privdata, const void *key1,
     return memcmp(key1, key2, l1) == 0;
 }
 
     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);
 void dictRedisObjectDestructor(void *privdata, void *val)
 {
     DICT_NOTUSED(privdata);
@@ -283,6 +335,10 @@ unsigned int dictSdsHash(const void *key) {
     return dictGenHashFunction((unsigned char*)key, sdslen((char*)key));
 }
 
     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)
 {
 int dictEncObjKeyCompare(void *privdata, const void *key1,
         const void *key2)
 {
@@ -324,7 +380,7 @@ unsigned int dictEncObjHash(const void *key) {
     }
 }
 
     }
 }
 
-/* Sets type */
+/* Sets type and diskstore negative caching hash table */
 dictType setDictType = {
     dictEncObjHash,            /* hash function */
     NULL,                      /* key dup */
 dictType setDictType = {
     dictEncObjHash,            /* hash function */
     NULL,                      /* key dup */
@@ -364,6 +420,16 @@ dictType keyptrDictType = {
     NULL                       /* val destructor */
 };
 
     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 */
 /* Hash type hash table (note that small hashes are represented with zimpaps) */
 dictType hashDictType = {
     dictEncObjHash,             /* hash function */
@@ -386,6 +452,17 @@ dictType keylistDictType = {
     dictListDestructor          /* val destructor */
 };
 
     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;
 
 int htNeedsResize(dict *dict) {
     long long size, used;
 
@@ -485,7 +562,7 @@ void updateLRUClock(void) {
 }
 
 int serverCron(struct aeEventLoop *eventLoop, long long id, void *clientData) {
 }
 
 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);
     REDIS_NOTUSED(eventLoop);
     REDIS_NOTUSED(id);
     REDIS_NOTUSED(clientData);
@@ -509,6 +586,10 @@ int serverCron(struct aeEventLoop *eventLoop, long long id, void *clientData) {
      */
     updateLRUClock();
 
      */
     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) {
     /* 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) {
@@ -549,23 +630,43 @@ int serverCron(struct aeEventLoop *eventLoop, long long id, void *clientData) {
     }
 
     /* Close connections of timedout clients */
     }
 
     /* Close connections of timedout clients */
-    if ((server.maxidletime && !(loops % 100)) || server.blpop_blocked_clients)
+    if ((server.maxidletime && !(loops % 100)) || server.bpop_blocked_clients)
         closeTimedoutClients();
 
         closeTimedoutClients();
 
-    /* Check if a background saving or AOF rewrite in progress terminated */
+    /* Check if a background saving or AOF rewrite in progress terminated. */
     if (server.bgsavechildpid != -1 || server.bgrewritechildpid != -1) {
         int statloc;
         pid_t pid;
 
         if ((pid = wait3(&statloc,WNOHANG,NULL)) != 0) {
     if (server.bgsavechildpid != -1 || server.bgrewritechildpid != -1) {
         int statloc;
         pid_t pid;
 
         if ((pid = wait3(&statloc,WNOHANG,NULL)) != 0) {
+            int exitcode = WEXITSTATUS(statloc);
+            int bysignal = 0;
+            
+            if (WIFSIGNALED(statloc)) bysignal = WTERMSIG(statloc);
+
             if (pid == server.bgsavechildpid) {
             if (pid == server.bgsavechildpid) {
-                backgroundSaveDoneHandler(statloc);
+                backgroundSaveDoneHandler(exitcode,bysignal);
             } else {
             } else {
-                backgroundRewriteDoneHandler(statloc);
+                backgroundRewriteDoneHandler(exitcode,bysignal);
             }
             updateDictResizePolicy();
         }
             }
             updateDictResizePolicy();
         }
-    } else {
+    } else if (server.bgsavethread != (pthread_t) -1) {
+        if (server.bgsavethread != (pthread_t) -1) {
+            int state;
+
+            pthread_mutex_lock(&server.bgsavethread_mutex);
+            state = server.bgsavethread_state;
+            pthread_mutex_unlock(&server.bgsavethread_mutex);
+
+            if (state == REDIS_BGSAVE_THREAD_DONE_OK ||
+                state == REDIS_BGSAVE_THREAD_DONE_ERR)
+            {
+                backgroundSaveDoneHandler(
+                    (state == REDIS_BGSAVE_THREAD_DONE_OK) ? 0 : 1, 0);
+            }
+        }
+    } else if (!server.ds_enabled) {
         /* 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 in progress check if
          * we have to save now */
          time_t now = time(NULL);
@@ -587,43 +688,18 @@ int serverCron(struct aeEventLoop *eventLoop, long long id, void *clientData) {
      * in order to guarantee a strict consistency. */
     if (server.masterhost == NULL) activeExpireCycle();
 
      * in order to guarantee a strict consistency. */
     if (server.masterhost == NULL) activeExpireCycle();
 
-    /* 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;
-        }
-    }
+    /* Remove a few cached objects from memory if we are over the
+     * configured memory limit */
+    if (server.ds_enabled) cacheCron();
 
 
-    /* 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();
-        }
-    }
+    /* Replication cron function -- used to reconnect to master and
+     * to detect transfer failures. */
+    if (!(loops % 10)) replicationCron();
 
 
-    /* Update fragmentation info, used for fast RSS estimation */
-    if (!(loops % 10)) server.fragmentation = zmalloc_get_fragmentation_ratio();
+    /* Run other sub-systems specific cron jobs */
+    if (server.cluster_enabled && !(loops % 10)) clusterCron();
+
+    server.cronloops++;
     return 100;
 }
 
     return 100;
 }
 
@@ -632,21 +708,22 @@ int serverCron(struct aeEventLoop *eventLoop, long long id, void *clientData) {
  * for ready file descriptors. */
 void beforeSleep(struct aeEventLoop *eventLoop) {
     REDIS_NOTUSED(eventLoop);
  * for ready file descriptors. */
 void beforeSleep(struct aeEventLoop *eventLoop) {
     REDIS_NOTUSED(eventLoop);
+    listNode *ln;
+    redisClient *c;
 
 
-    /* Awake clients that got all the swapped keys they requested */
-    if (server.vm_enabled && listLength(server.io_ready_clients)) {
+    /* Awake clients that got all the on disk keys they requested */
+    if (server.ds_enabled && listLength(server.io_ready_clients)) {
         listIter li;
         listIter li;
-        listNode *ln;
 
         listRewind(server.io_ready_clients,&li);
         while((ln = listNext(&li))) {
 
         listRewind(server.io_ready_clients,&li);
         while((ln = listNext(&li))) {
-            redisClient *c = ln->value;
+            c = ln->value;
             struct redisCommand *cmd;
 
             /* Resume the client. */
             listDelNode(server.io_ready_clients,ln);
             c->flags &= (~REDIS_IO_WAIT);
             struct redisCommand *cmd;
 
             /* Resume the client. */
             listDelNode(server.io_ready_clients,ln);
             c->flags &= (~REDIS_IO_WAIT);
-            server.vm_blocked_clients--;
+            server.cache_blocked_clients--;
             aeCreateFileEvent(server.el, c->fd, AE_READABLE,
                 readQueryFromClient, c);
             cmd = lookupCommand(c->argv[0]->ptr);
             aeCreateFileEvent(server.el, c->fd, AE_READABLE,
                 readQueryFromClient, c);
             cmd = lookupCommand(c->argv[0]->ptr);
@@ -658,6 +735,20 @@ void beforeSleep(struct aeEventLoop *eventLoop) {
                 processInputBuffer(c);
         }
     }
                 processInputBuffer(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)
+            processInputBuffer(c);
+    }
+
     /* Write the AOF buffer on disk */
     flushAppendOnlyFile();
 }
     /* Write the AOF buffer on disk */
     flushAppendOnlyFile();
 }
@@ -689,6 +780,8 @@ void createSharedObjects(void) {
         "-ERR source and destination objects are the same\r\n"));
     shared.outofrangeerr = createObject(REDIS_STRING,sdsnew(
         "-ERR index out of range\r\n"));
         "-ERR source and destination objects are the same\r\n"));
     shared.outofrangeerr = createObject(REDIS_STRING,sdsnew(
         "-ERR index out of range\r\n"));
+    shared.loadingerr = createObject(REDIS_STRING,sdsnew(
+        "-LOADING Redis is loading the dataset in memory\r\n"));
     shared.space = createObject(REDIS_STRING,sdsnew(" "));
     shared.colon = createObject(REDIS_STRING,sdsnew(":"));
     shared.plus = createObject(REDIS_STRING,sdsnew("+"));
     shared.space = createObject(REDIS_STRING,sdsnew(" "));
     shared.colon = createObject(REDIS_STRING,sdsnew(":"));
     shared.plus = createObject(REDIS_STRING,sdsnew("+"));
@@ -717,14 +810,20 @@ void createSharedObjects(void) {
 }
 
 void initServerConfig() {
 }
 
 void initServerConfig() {
-    server.dbnum = REDIS_DEFAULT_DBNUM;
     server.port = REDIS_SERVERPORT;
     server.port = REDIS_SERVERPORT;
+    server.bindaddr = NULL;
+    server.unixsocket = NULL;
+    server.ipfd = -1;
+    server.sofd = -1;
+    server.dbnum = REDIS_DEFAULT_DBNUM;
     server.verbosity = REDIS_VERBOSE;
     server.maxidletime = REDIS_MAXIDLETIME;
     server.saveparams = NULL;
     server.verbosity = REDIS_VERBOSE;
     server.maxidletime = REDIS_MAXIDLETIME;
     server.saveparams = NULL;
+    server.loading = 0;
     server.logfile = NULL; /* NULL = log on standard output */
     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.daemonize = 0;
     server.appendonly = 0;
     server.appendfsync = APPENDFSYNC_EVERYSEC;
@@ -738,25 +837,26 @@ void initServerConfig() {
     server.requirepass = NULL;
     server.rdbcompression = 1;
     server.activerehashing = 1;
     server.requirepass = NULL;
     server.rdbcompression = 1;
     server.activerehashing = 1;
-    server.fragmentation = 1;
     server.maxclients = 0;
     server.maxclients = 0;
-    server.blpop_blocked_clients = 0;
+    server.bpop_blocked_clients = 0;
     server.maxmemory = 0;
     server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_LRU;
     server.maxmemory_samples = 3;
     server.maxmemory = 0;
     server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_LRU;
     server.maxmemory_samples = 3;
-    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.ds_enabled = 0;
+    server.ds_path = sdsnew("/tmp/redis.ds");
+    server.cache_max_memory = 64LL*1024*1024; /* 64 MB of RAM */
+    server.cache_blocked_clients = 0;
     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.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.shutdown_asap = 0;
+    server.cache_flush_delay = 0;
+    server.cluster_enabled = 0;
+    server.cluster.configfile = zstrdup("nodes.conf");
 
     updateLRUClock();
     resetServerSaveParams();
 
     updateLRUClock();
     resetServerSaveParams();
@@ -771,12 +871,21 @@ void initServerConfig() {
     server.masterport = 6379;
     server.master = NULL;
     server.replstate = REDIS_REPL_NONE;
     server.masterport = 6379;
     server.master = NULL;
     server.replstate = REDIS_REPL_NONE;
+    server.repl_serve_stale_data = 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;
 
     /* 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");
 }
 
 void initServer() {
 }
 
 void initServer() {
@@ -784,24 +893,41 @@ void initServer() {
 
     signal(SIGHUP, SIG_IGN);
     signal(SIGPIPE, SIG_IGN);
 
     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.mainthread = pthread_self();
     server.clients = listCreate();
     server.slaves = listCreate();
     server.monitors = listCreate();
     server.clients = listCreate();
     server.slaves = listCreate();
     server.monitors = listCreate();
-    server.objfreelist = listCreate();
+    server.unblocked_clients = listCreate();
+    server.cache_io_queue = listCreate();
+
     createSharedObjects();
     server.el = aeCreateEventLoop();
     server.db = zmalloc(sizeof(redisDb)*server.dbnum);
     createSharedObjects();
     server.el = aeCreateEventLoop();
     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: %s", server.neterr);
+            exit(1);
+        }
+    }
+    if (server.unixsocket != NULL) {
+        unlink(server.unixsocket); /* don't care if this fails */
+        server.sofd = anetUnixServer(server.neterr,server.unixsocket);
+        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++) {
         exit(1);
     }
     for (j = 0; j < server.dbnum; j++) {
@@ -809,8 +935,11 @@ void initServer() {
         server.db[j].expires = dictCreate(&keyptrDictType,NULL);
         server.db[j].blocking_keys = dictCreate(&keylistDictType,NULL);
         server.db[j].watched_keys = dictCreate(&keylistDictType,NULL);
         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)
+        if (server.ds_enabled) {
             server.db[j].io_keys = dictCreate(&keylistDictType,NULL);
             server.db[j].io_keys = dictCreate(&keylistDictType,NULL);
+            server.db[j].io_negcache = dictCreate(&setDictType,NULL);
+            server.db[j].io_queued = dictCreate(&setDictType,NULL);
+        }
         server.db[j].id = j;
     }
     server.pubsub_channels = dictCreate(&keylistDictType,NULL);
         server.db[j].id = j;
     }
     server.pubsub_channels = dictCreate(&keylistDictType,NULL);
@@ -820,6 +949,8 @@ void initServer() {
     server.cronloops = 0;
     server.bgsavechildpid = -1;
     server.bgrewritechildpid = -1;
     server.cronloops = 0;
     server.bgsavechildpid = -1;
     server.bgrewritechildpid = -1;
+    server.bgsavethread_state = REDIS_BGSAVE_THREAD_UNACTIVE;
+    server.bgsavethread = (pthread_t) -1;
     server.bgrewritebuf = sdsempty();
     server.aofbuf = sdsempty();
     server.lastsave = time(NULL);
     server.bgrewritebuf = sdsempty();
     server.aofbuf = sdsempty();
     server.lastsave = time(NULL);
@@ -827,13 +958,17 @@ void initServer() {
     server.stat_numcommands = 0;
     server.stat_numconnections = 0;
     server.stat_expiredkeys = 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_starttime = time(NULL);
     server.stat_keyspace_misses = 0;
     server.stat_keyspace_hits = 0;
+    server.stat_peak_memory = 0;
     server.unixtime = time(NULL);
     aeCreateTimeEvent(server.el, 1, serverCron, NULL, NULL);
     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.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.appendonly) {
         server.appendfd = open(server.appendfilename,O_WRONLY|O_APPEND|O_CREAT,0644);
@@ -844,43 +979,62 @@ void initServer() {
         }
     }
 
         }
     }
 
-    if (server.vm_enabled) vmInit();
+    if (server.ds_enabled) dsInit();
+    if (server.cluster_enabled) clusterInit();
+    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;
+        int retval;
+
+        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 ===================== */
 
 }
 
 /* ====================== 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) {
 }
 
 /* Call() is the core of Redis execution of a command */
 void call(redisClient *c, struct redisCommand *cmd) {
-    long long dirty;
+    long long dirty, start = ustime();
 
     dirty = server.dirty;
     cmd->proc(c);
     dirty = server.dirty-dirty;
 
     dirty = server.dirty;
     cmd->proc(c);
     dirty = server.dirty-dirty;
+    cmd->microseconds += ustime()-start;
+    cmd->calls++;
 
     if (server.appendonly && dirty)
         feedAppendOnlyFile(cmd,c->db->id,c->argv,c->argc);
 
     if (server.appendonly && dirty)
         feedAppendOnlyFile(cmd,c->db->id,c->argv,c->argc);
@@ -933,6 +1087,29 @@ int processCommand(redisClient *c) {
         return REDIS_OK;
     }
 
         return REDIS_OK;
     }
 
+    /* If cluster is enabled, redirect here */
+    if (server.cluster_enabled &&
+                !(cmd->getkeys_proc == NULL && 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,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
     /* Handle the maxmemory directive.
      *
      * First we try to free some memory if possible (if there are volatile
@@ -955,6 +1132,23 @@ int processCommand(redisClient *c) {
         return REDIS_OK;
     }
 
         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 &&
+        server.repl_serve_stale_data == 0 &&
+        cmd->proc != infoCommand && 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 && cmd->proc != infoCommand) {
+        addReply(c, shared.loadingerr);
+        return REDIS_OK;
+    }
+
     /* Exec the command */
     if (c->flags & REDIS_MULTI &&
         cmd->proc != execCommand && cmd->proc != discardCommand &&
     /* Exec the command */
     if (c->flags & REDIS_MULTI &&
         cmd->proc != execCommand && cmd->proc != discardCommand &&
@@ -963,8 +1157,8 @@ int processCommand(redisClient *c) {
         queueMultiCommand(c,cmd);
         addReply(c,shared.queued);
     } else {
         queueMultiCommand(c,cmd);
         addReply(c,shared.queued);
     } else {
-        if (server.vm_enabled && server.vm_max_threads > 0 &&
-            blockClientOnSwappedKeys(c,cmd)) return REDIS_ERR;
+        if (server.ds_enabled && blockClientOnSwappedKeys(c,cmd))
+            return REDIS_ERR;
         call(c,cmd);
     }
     return REDIS_OK;
         call(c,cmd);
     }
     return REDIS_OK;
@@ -982,10 +1176,11 @@ int prepareForShutdown() {
         kill(server.bgsavechildpid,SIGKILL);
         rdbRemoveTempFile(server.bgsavechildpid);
     }
         kill(server.bgsavechildpid,SIGKILL);
         rdbRemoveTempFile(server.bgsavechildpid);
     }
-    if (server.appendonly) {
+    if (server.ds_enabled) {
+        /* FIXME: flush all objects on disk */
+    } else if (server.appendonly) {
         /* Append only file: fsync() the AOF and exit */
         aof_fsync(server.appendfd);
         /* Append only file: fsync() the AOF and exit */
         aof_fsync(server.appendfd);
-        if (server.vm_enabled) unlink(server.vm_swap_file);
     } else if (server.saveparamslen > 0) {
         /* Snapshotting. Perform a SYNC SAVE and exit */
         if (rdbSave(server.dbfilename) != REDIS_OK) {
     } else if (server.saveparamslen > 0) {
         /* Snapshotting. Perform a SYNC SAVE and exit */
         if (rdbSave(server.dbfilename) != REDIS_OK) {
@@ -1049,155 +1244,314 @@ void bytesToHuman(char *s, unsigned long long n) {
 /* 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. */
 /* 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;
     time_t uptime = time(NULL)-server.stat_starttime;
-    int j;
-    char hmem[64];
+    int j, numcommands;
     struct rusage self_ru, c_ru;
     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);
 
     getrusage(RUSAGE_SELF, &self_ru);
     getrusage(RUSAGE_CHILDREN, &c_ru);
+    getClientsMaxBuffers(&lol,&bib);
 
 
-    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"
-        "lru_clock:%ld\r\n"
+    /* Server */
+    if (allsections || defsections || !strcasecmp(section,"server")) {
+        if (sections++) info = sdscat(info,"\r\n");
+        info = sdscatprintf(info,
+            "# 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"
+            "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(),
+            (long) getpid(),
+            server.port,
+            uptime,
+            uptime/(3600*24),
+            (unsigned long) server.lruclock);
+    }
+
+    /* Clients */
+    if (allsections || defsections || !strcasecmp(section,"clients")) {
+        if (sections++) info = sdscat(info,"\r\n");
+        info = sdscatprintf(info,
+            "# 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);
+    }
+
+    /* 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"
+            "mem_fragmentation_ratio:%.2f\r\n"
+            "mem_allocator:%s\r\n",
+            zmalloc_used_memory(),
+            hmem,
+            zmalloc_get_rss(),
+            server.stat_peak_memory,
+            peak_hmem,
+            zmalloc_get_fragmentation_ratio(),
+            REDIS_MALLOC
+            );
+    }
+
+    /* Allocation statistics */
+    if (allsections || !strcasecmp(section,"allocstats")) {
+        if (sections++) info = sdscat(info,"\r\n");
+        info = sdscat(info, "# Allocstats\r\nallocation_stats:");
+        for (j = 0; j <= ZMALLOC_MAX_ALLOC_STAT; j++) {
+            size_t count = zmalloc_allocations_for_size(j);
+            if (count) {
+                if (info[sdslen(info)-1] != ':') info = sdscatlen(info,",",1);
+                info = sdscatprintf(info,"%s%d=%zu",
+                    (j == ZMALLOC_MAX_ALLOC_STAT) ? ">=" : "",
+                    j,count);
+            }
+        }
+        info = sdscat(info,"\r\n");
+    }
+
+    /* 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.appendonly,
+            server.dirty,
+                server.bgsavechildpid != -1 ||
+                server.bgsavethread != (pthread_t) -1,
+            server.lastsave,
+            server.bgrewritechildpid != -1);
+
+        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
+            );
+        }
+    }
+
+    /* Diskstore */
+    if (allsections || defsections || !strcasecmp(section,"diskstore")) {
+        if (sections++) info = sdscat(info,"\r\n");
+        info = sdscatprintf(info,
+            "# Diskstore\r\n"
+            "ds_enabled:%d\r\n",
+            server.ds_enabled != 0);
+        if (server.ds_enabled) {
+            lockThreadedIO();
+            info = sdscatprintf(info,
+                "cache_max_memory:%llu\r\n"
+                "cache_blocked_clients:%lu\r\n"
+                "cache_io_queue_len:%lu\r\n"
+                "cache_io_jobs_new:%lu\r\n"
+                "cache_io_jobs_processing:%lu\r\n"
+                "cache_io_jobs_processed:%lu\r\n"
+                "cache_io_ready_clients:%lu\r\n"
+                ,(unsigned long long) server.cache_max_memory,
+                (unsigned long) server.cache_blocked_clients,
+                (unsigned long) listLength(server.cache_io_queue),
+                (unsigned long) listLength(server.io_newjobs),
+                (unsigned long) listLength(server.io_processing),
+                (unsigned long) listLength(server.io_processed),
+                (unsigned long) listLength(server.io_ready_clients)
+            );
+            unlockThreadedIO();
+        }
+    }
+
+    /* 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"
+            "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",
+            server.stat_numconnections,
+            server.stat_numcommands,
+            server.stat_expiredkeys,
+            server.stat_evictedkeys,
+            server.stat_keyspace_hits,
+            server.stat_keyspace_misses,
+            dictSize(server.pubsub_channels),
+            listLength(server.pubsub_patterns));
+    }
+
+    /* 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.replstate == REDIS_REPL_CONNECTED) ?
+                    "up" : "down",
+                server.master ?
+                ((int)(time(NULL)-server.master->lastinteraction)) : -1,
+                server.replstate == REDIS_REPL_TRANSFER
+            );
+
+            if (server.replstate == 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)
+                );
+            }
+        }
+        info = sdscatprintf(info,
+            "connected_slaves:%d\r\n",
+            listLength(server.slaves));
+    }
+
+    /* 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_childrens:%.2f\r\n"
         "used_cpu_sys:%.2f\r\n"
         "used_cpu_user:%.2f\r\n"
         "used_cpu_sys_childrens:%.2f\r\n"
-        "used_cpu_user_childrens:%.2f\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"
-        "used_memory_rss:%zu\r\n"
-        "used_memory_estimated_rss:%zu\r\n"
-        "mem_fragmentation_ratio:%.2f\r\n"
-        "use_tcmalloc:%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"
-        "total_connections_received:%lld\r\n"
-        "total_commands_processed:%lld\r\n"
-        "expired_keys:%lld\r\n"
-        "keyspace_hits:%lld\r\n"
-        "keyspace_misses:%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),
-        (unsigned long) server.lruclock,
+        "used_cpu_user_childrens:%.2f\r\n",
         (float)self_ru.ru_utime.tv_sec+(float)self_ru.ru_utime.tv_usec/1000000,
         (float)self_ru.ru_stime.tv_sec+(float)self_ru.ru_stime.tv_usec/1000000,
         (float)c_ru.ru_utime.tv_sec+(float)c_ru.ru_utime.tv_usec/1000000,
         (float)self_ru.ru_utime.tv_sec+(float)self_ru.ru_utime.tv_usec/1000000,
         (float)self_ru.ru_stime.tv_sec+(float)self_ru.ru_stime.tv_usec/1000000,
         (float)c_ru.ru_utime.tv_sec+(float)c_ru.ru_utime.tv_usec/1000000,
-        (float)c_ru.ru_stime.tv_sec+(float)c_ru.ru_stime.tv_usec/1000000,
-        listLength(server.clients)-listLength(server.slaves),
-        listLength(server.slaves),
-        server.blpop_blocked_clients,
-        zmalloc_used_memory(),
-        hmem,
-        zmalloc_get_rss(),
-        redisEstimateRSS(),
-        zmalloc_get_fragmentation_ratio(),
-#ifdef USE_TCMALLOC
-        1,
-#else
-        0,
-#endif
-        server.dirty,
-        server.bgsavechildpid != -1,
-        server.lastsave,
-        server.bgrewritechildpid != -1,
-        server.stat_numconnections,
-        server.stat_numcommands,
-        server.stat_expiredkeys,
-        server.stat_keyspace_hits,
-        server.stat_keyspace_misses,
-        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) {
-        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
-        );
+        (float)c_ru.ru_stime.tv_sec+(float)c_ru.ru_stime.tv_usec/1000000);
     }
     }
-    if (server.vm_enabled) {
-        lockThreadedIO();
+
+    /* 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,
         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();
+        "# Cluster\r\n"
+        "cluster_enabled:%d\r\n",
+        server.cluster_enabled);
     }
     }
-    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);
+    /* 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) {
         }
     }
     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(),"$%lu\r\n",
         (unsigned long)sdslen(info)));
     addReplySds(c,info);
     addReplySds(c,sdscatprintf(sdsempty(),"$%lu\r\n",
         (unsigned long)sdslen(info)));
     addReplySds(c,info);
@@ -1216,61 +1570,6 @@ void monitorCommand(redisClient *c) {
 
 /* ============================ Maxmemory directive  ======================== */
 
 
 /* ============================ 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;
-    }
-}
-
-/* A fast RSS sampling function.
- *
- * The function is reasonably accurate while fast, since it uses the trick of
- * using the server.fragmentation ratio that is computed every second and
- * is the ratio between the RSS and our zmalloc() count of allocated bytes.
- *
- * So in order to compute the current RSS used we just need to multiply
- * the zmalloc() memory reporting, that is as fast as reading a counter,
- * for the latest estimation of fragmentation.
- *
- * The behavior of this function is also very desirable because it is
- * very responsive to memory changes: while the real RSS is actually measured
- * in pages, the RSS estimation will actually change even if just a few bytes
- * are freed, and this is a good property when the function is used in order
- * to evict keys for Virtual Memory of for 'maxmemory' directive.
- *
- * Note that when the memory reported by zmalloc is smaller than the RSS
- * (that is, fragmentation < 1) this means that something is odd (many pages
- * swapped since the Redis instance is idle) and we consider the fragmentation
- * ratio 1. */
-size_t redisEstimateRSS(void) {
-    size_t used = zmalloc_used_memory();
-    float maxfrag;
-
-    if (server.fragmentation < 1) return used;
-    maxfrag = (float)SIZE_MAX / used;
-    
-    /* If multiplying memory usage reported by zmalloc per fragmentation
-     * ratio will lead to an overflow we just return SIZE_MAX. */
-    if (maxfrag < server.fragmentation) return SIZE_MAX;
-
-    return (size_t)((used * server.fragmentation));
-}
-
 /* 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:
 /* 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:
@@ -1285,12 +1584,11 @@ size_t redisEstimateRSS(void) {
 void freeMemoryIfNeeded(void) {
     /* Remove keys accordingly to the active policy as long as we are
      * over the memory limit. */
 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;
 
     while (server.maxmemory && zmalloc_used_memory() > server.maxmemory) {
         int j, k, freed = 0;
 
-        /* Basic strategy -- remove objects from the free list. */
-        if (tryFreeOneObjectFromFreelist() == REDIS_OK) continue;
-
         for (j = 0; j < server.dbnum; j++) {
             long bestval = 0; /* just to prevent warning */
             sds bestkey = NULL;
         for (j = 0; j < server.dbnum; j++) {
             long bestval = 0; /* just to prevent warning */
             sds bestkey = NULL;
@@ -1326,6 +1624,10 @@ void freeMemoryIfNeeded(void) {
 
                     de = dictGetRandomKey(dict);
                     thiskey = dictGetEntryKey(de);
 
                     de = dictGetRandomKey(dict);
                     thiskey = dictGetEntryKey(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 = dictGetEntryVal(de);
                     thisval = estimateObjectIdleTime(o);
 
                     o = dictGetEntryVal(de);
                     thisval = estimateObjectIdleTime(o);
 
@@ -1359,45 +1661,15 @@ void freeMemoryIfNeeded(void) {
             /* Finally remove the selected key. */
             if (bestkey) {
                 robj *keyobj = createStringObject(bestkey,sdslen(bestkey));
             /* Finally remove the selected key. */
             if (bestkey) {
                 robj *keyobj = createStringObject(bestkey,sdslen(bestkey));
+                propagateExpire(db,keyobj);
                 dbDelete(db,keyobj);
                 dbDelete(db,keyobj);
-                server.stat_expiredkeys++;
+                server.stat_evictedkeys++;
                 decrRefCount(keyobj);
                 freed++;
             }
         }
         if (!freed) return; /* nothing to free... */
     }
                 decrRefCount(keyobj);
                 freed++;
             }
         }
         if (!freed) return; /* nothing to free... */
     }
-
-    while(0) {
-        int j, k, freed = 0;
-        for (j = 0; j < server.dbnum; j++) {
-            int minttl = -1;
-            sds minkey = NULL;
-            robj *keyobj = NULL;
-            struct dictEntry *de;
-
-            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;
-                    }
-                }
-                keyobj = createStringObject(minkey,sdslen(minkey));
-                dbDelete(server.db+j,keyobj);
-                server.stat_expiredkeys++;
-                decrRefCount(keyobj);
-            }
-        }
-        if (!freed) return; /* nothing to free... */
-    }
 }
 
 /* =================================== Main! ================================ */
 }
 
 /* =================================== Main! ================================ */
@@ -1428,7 +1700,7 @@ void createPidFile(void) {
     /* Try to write the pid file in a best-effort way. */
     FILE *fp = fopen(server.pidfile,"w");
     if (fp) {
     /* Try to write the pid file in a best-effort way. */
     FILE *fp = fopen(server.pidfile,"w");
     if (fp) {
-        fprintf(fp,"%d\n",getpid());
+        fprintf(fp,"%d\n",(int)getpid());
         fclose(fp);
     }
 }
         fclose(fp);
     }
 }
@@ -1462,11 +1734,27 @@ void usage() {
     exit(1);
 }
 
     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);
+}
+
 int main(int argc, char **argv) {
 int main(int argc, char **argv) {
-    time_t start;
+    long long start;
 
     initServerConfig();
 
     initServerConfig();
-    sortCommandTable();
     if (argc == 2) {
         if (strcmp(argv[1], "-v") == 0 ||
             strcmp(argv[1], "--version") == 0) version();
     if (argc == 2) {
         if (strcmp(argv[1], "-v") == 0 ||
             strcmp(argv[1], "--version") == 0) version();
@@ -1481,29 +1769,33 @@ int main(int argc, char **argv) {
     if (server.daemonize) daemonize();
     initServer();
     if (server.daemonize) createPidFile();
     if (server.daemonize) daemonize();
     initServer();
     if (server.daemonize) createPidFile();
+    redisAsciiArt();
     redisLog(REDIS_NOTICE,"Server started, Redis version " REDIS_VERSION);
 #ifdef __linux__
     linuxOvercommitMemoryWarning();
 #endif
     redisLog(REDIS_NOTICE,"Server started, Redis version " REDIS_VERSION);
 #ifdef __linux__
     linuxOvercommitMemoryWarning();
 #endif
-    start = time(NULL);
-    if (server.appendonly) {
+    start = ustime();
+    if (server.ds_enabled) {
+        redisLog(REDIS_NOTICE,"DB not loaded (running with disk back end)");
+    } else if (server.appendonly) {
         if (loadAppendOnlyFile(server.appendfilename) == REDIS_OK)
         if (loadAppendOnlyFile(server.appendfilename) == REDIS_OK)
-            redisLog(REDIS_NOTICE,"DB loaded from append only file: %ld seconds",time(NULL)-start);
+            redisLog(REDIS_NOTICE,"DB loaded from append only file: %.3f seconds",(float)(ustime()-start)/1000000);
     } else {
         if (rdbLoad(server.dbfilename) == REDIS_OK)
     } else {
         if (rdbLoad(server.dbfilename) == REDIS_OK)
-            redisLog(REDIS_NOTICE,"DB loaded from disk: %ld seconds",time(NULL)-start);
+            redisLog(REDIS_NOTICE,"DB loaded from disk: %.3f seconds",(float)(ustime()-start)/1000000);
     }
     }
-    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;
 }
 
     aeSetBeforeSleepProc(server.el,beforeSleep);
     aeMain(server.el);
     aeDeleteEventLoop(server.el);
     return 0;
 }
 
-/* ============================= Backtrace support ========================= */
-
 #ifdef HAVE_BACKTRACE
 #ifdef HAVE_BACKTRACE
-void *getMcontextEip(ucontext_t *uc) {
+static void *getMcontextEip(ucontext_t *uc) {
 #if defined(__FreeBSD__)
     return (void*) uc->uc_mcontext.mc_eip;
 #elif defined(__dietlibc__)
 #if defined(__FreeBSD__)
     return (void*) uc->uc_mcontext.mc_eip;
 #elif defined(__dietlibc__)
@@ -1531,7 +1823,7 @@ void *getMcontextEip(ucontext_t *uc) {
 #endif
 }
 
 #endif
 }
 
-void segvHandler(int sig, siginfo_t *info, void *secret) {
+static void sigsegvHandler(int sig, siginfo_t *info, void *secret) {
     void *trace[100];
     char **messages = NULL;
     int i, trace_size = 0;
     void *trace[100];
     char **messages = NULL;
     int i, trace_size = 0;
@@ -1542,8 +1834,8 @@ void segvHandler(int sig, siginfo_t *info, void *secret) {
 
     redisLog(REDIS_WARNING,
         "======= Ooops! Redis %s got signal: -%d- =======", REDIS_VERSION, sig);
 
     redisLog(REDIS_WARNING,
         "======= Ooops! Redis %s got signal: -%d- =======", REDIS_VERSION, sig);
-    infostring = genRedisInfoString();
-    redisLog(REDIS_WARNING, "%s",infostring);
+    infostring = genRedisInfoString("all");
+    redisLogRaw(REDIS_WARNING, infostring);
     /* It's not safe to sdsfree() the returned string under memory
      * corruption conditions. Let it leak as we are going to abort */
 
     /* It's not safe to sdsfree() the returned string under memory
      * corruption conditions. Let it leak as we are going to abort */
 
@@ -1570,37 +1862,35 @@ void segvHandler(int sig, siginfo_t *info, void *secret) {
     sigaction (sig, &act, NULL);
     kill(getpid(),sig);
 }
     sigaction (sig, &act, NULL);
     kill(getpid(),sig);
 }
+#endif /* HAVE_BACKTRACE */
 
 
-void sigtermHandler(int sig) {
+static void sigtermHandler(int sig) {
     REDIS_NOTUSED(sig);
 
     REDIS_NOTUSED(sig);
 
-    redisLog(REDIS_WARNING,"SIGTERM received, scheduling shutting down...");
+    redisLog(REDIS_WARNING,"Received SIGTERM, scheduling shutdown...");
     server.shutdown_asap = 1;
 }
 
     server.shutdown_asap = 1;
 }
 
-void setupSigSegvAction(void) {
+void setupSignalHandlers(void) {
     struct sigaction act;
 
     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);
-
+    /* 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;
     act.sa_flags = SA_NODEFER | SA_ONSTACK | SA_RESETHAND;
     act.sa_handler = sigtermHandler;
-    sigaction (SIGTERM, &act, NULL);
-    return;
-}
+    sigaction(SIGTERM, &act, NULL);
 
 
-#else /* HAVE_BACKTRACE */
-void setupSigSegvAction(void) {
+#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;
 }
 }
-#endif /* HAVE_BACKTRACE */
 
 /* The End */
 
 /* The End */
Redis += OpenLDAP MDB