{"lastsave",lastsaveCommand,1,"r",0,NULL,0,0,0,0,0},
{"type",typeCommand,2,"r",0,NULL,1,1,1,0,0},
{"multi",multiCommand,1,"rs",0,NULL,0,0,0,0,0},
- {"exec",execCommand,1,"wms",0,NULL,0,0,0,0,0},
+ {"exec",execCommand,1,"s",0,NULL,0,0,0,0,0},
{"discard",discardCommand,1,"rs",0,NULL,0,0,0,0,0},
{"sync",syncCommand,1,"ars",0,NULL,0,0,0,0,0},
{"flushdb",flushdbCommand,1,"w",0,NULL,0,0,0,0,0},
{"pttl",pttlCommand,2,"r",0,NULL,1,1,1,0,0},
{"persist",persistCommand,2,"w",0,NULL,1,1,1,0,0},
{"slaveof",slaveofCommand,3,"aws",0,NULL,0,0,0,0,0},
- {"debug",debugCommand,-2,"aws",0,NULL,0,0,0,0,0},
+ {"debug",debugCommand,-2,"as",0,NULL,0,0,0,0,0},
{"config",configCommand,-2,"ar",0,NULL,0,0,0,0,0},
{"subscribe",subscribeCommand,-2,"rps",0,NULL,0,0,0,0,0},
{"unsubscribe",unsubscribeCommand,-1,"rps",0,NULL,0,0,0,0,0},
{"psubscribe",psubscribeCommand,-2,"rps",0,NULL,0,0,0,0,0},
{"punsubscribe",punsubscribeCommand,-1,"rps",0,NULL,0,0,0,0,0},
- {"publish",publishCommand,3,"rpf",0,NULL,0,0,0,0,0},
+ {"publish",publishCommand,3,"pf",0,NULL,0,0,0,0,0},
{"watch",watchCommand,-2,"rs",0,noPreloadGetKeys,1,-1,1,0,0},
{"unwatch",unwatchCommand,1,"rs",0,NULL,0,0,0,0,0},
{"restore",restoreCommand,4,"awm",0,NULL,1,1,1,0,0},
{"dump",dumpCommand,2,"ar",0,NULL,1,1,1,0,0},
{"object",objectCommand,-2,"r",0,NULL,2,2,2,0,0},
{"client",clientCommand,-2,"ar",0,NULL,0,0,0,0,0},
- {"eval",evalCommand,-3,"wms",0,zunionInterGetKeys,0,0,0,0,0},
- {"evalsha",evalShaCommand,-3,"wms",0,zunionInterGetKeys,0,0,0,0,0},
+ {"eval",evalCommand,-3,"s",0,zunionInterGetKeys,0,0,0,0,0},
+ {"evalsha",evalShaCommand,-3,"s",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},
{"time",timeCommand,1,"rR",0,NULL,0,0,0,0,0}
redisLogRaw(level,msg);
}
+/* Log a fixed message without printf-alike capabilities, in a way that is
+ * safe to call from a signal handler.
+ *
+ * We actually use this only for signals that are not fatal from the point
+ * of view of Redis. Signals that are going to kill the server anyway and
+ * where we need printf-alike features are served by redisLog(). */
+void redisLogFromHandler(int level, const char *msg) {
+ int fd;
+ char buf[64];
+
+ if ((level&0xff) < server.verbosity ||
+ (server.logfile == NULL && server.daemonize)) return;
+ fd = server.logfile ?
+ open(server.logfile, O_APPEND|O_CREAT|O_WRONLY, 0644) :
+ STDOUT_FILENO;
+ if (fd == -1) return;
+ ll2string(buf,sizeof(buf),getpid());
+ write(fd,"[",1);
+ write(fd,buf,strlen(buf));
+ write(fd," | signal handler] (",20);
+ ll2string(buf,sizeof(buf),time(NULL));
+ write(fd,buf,strlen(buf));
+ write(fd,") ",2);
+ write(fd,msg,strlen(msg));
+ write(fd,"\n",1);
+ if (server.logfile) close(fd);
+}
+
/* Redis generally does not try to recover from out of memory conditions
* when allocating objects or strings, it is not clear if it will be possible
* to report this condition to the client since the networking layer itself
}
void updateLRUClock(void) {
- server.lruclock = (time(NULL)/REDIS_LRU_CLOCK_RESOLUTION) &
+ server.lruclock = (server.unixtime/REDIS_LRU_CLOCK_RESOLUTION) &
REDIS_LRU_CLOCK_MAX;
}
return sum / REDIS_OPS_SEC_SAMPLES;
}
+/* Check for timeouts. Returns non-zero if the client was terminated */
+int clientsCronHandleTimeout(redisClient *c) {
+ time_t now = server.unixtime;
+
+ if (server.maxidletime &&
+ !(c->flags & REDIS_SLAVE) && /* no timeout for slaves */
+ !(c->flags & REDIS_MASTER) && /* no timeout for masters */
+ !(c->flags & REDIS_BLOCKED) && /* no timeout for BLPOP */
+ dictSize(c->pubsub_channels) == 0 && /* no timeout for pubsub */
+ listLength(c->pubsub_patterns) == 0 &&
+ (now - c->lastinteraction > server.maxidletime))
+ {
+ redisLog(REDIS_VERBOSE,"Closing idle client");
+ freeClient(c);
+ return 1;
+ } else if (c->flags & REDIS_BLOCKED) {
+ if (c->bpop.timeout != 0 && c->bpop.timeout < now) {
+ addReply(c,shared.nullmultibulk);
+ unblockClientWaitingData(c);
+ }
+ }
+ return 0;
+}
+
+/* The client query buffer is an sds.c string that can end with a lot of
+ * free space not used, this function reclaims space if needed.
+ *
+ * The funciton always returns 0 as it never terminates the client. */
+int clientsCronResizeQueryBuffer(redisClient *c) {
+ size_t querybuf_size = sdsAllocSize(c->querybuf);
+ time_t idletime = server.unixtime - c->lastinteraction;
+
+ /* There are two conditions to resize the query buffer:
+ * 1) Query buffer is > BIG_ARG and too big for latest peak.
+ * 2) Client is inactive and the buffer is bigger than 1k. */
+ if (((querybuf_size > REDIS_MBULK_BIG_ARG) &&
+ (querybuf_size/(c->querybuf_peak+1)) > 2) ||
+ (querybuf_size > 1024 && idletime > 2))
+ {
+ /* Only resize the query buffer if it is actually wasting space. */
+ if (sdsavail(c->querybuf) > 1024) {
+ c->querybuf = sdsRemoveFreeSpace(c->querybuf);
+ }
+ }
+ /* Reset the peak again to capture the peak memory usage in the next
+ * cycle. */
+ c->querybuf_peak = 0;
+ return 0;
+}
+
+void clientsCron(void) {
+ /* Make sure to process at least 1/100 of clients per call.
+ * Since this function is called 10 times per second we are sure that
+ * in the worst case we process all the clients in 10 seconds.
+ * In normal conditions (a reasonable number of clients) we process
+ * all the clients in a shorter time. */
+ int numclients = listLength(server.clients);
+ int iterations = numclients/100;
+
+ if (iterations < 50)
+ iterations = (numclients < 50) ? numclients : 50;
+ while(listLength(server.clients) && iterations--) {
+ redisClient *c;
+ listNode *head;
+
+ /* Rotate the list, take the current head, process.
+ * This way if the client must be removed from the list it's the
+ * first element and we don't incur into O(N) computation. */
+ listRotate(server.clients);
+ head = listFirst(server.clients);
+ c = listNodeValue(head);
+ /* The following functions do different service checks on the client.
+ * The protocol is that they return non-zero if the client was
+ * terminated. */
+ if (clientsCronHandleTimeout(c)) continue;
+ if (clientsCronResizeQueryBuffer(c)) continue;
+ }
+}
+
int serverCron(struct aeEventLoop *eventLoop, long long id, void *clientData) {
int j, loops = server.cronloops;
REDIS_NOTUSED(eventLoop);
REDIS_NOTUSED(id);
REDIS_NOTUSED(clientData);
+ /* Software watchdog: deliver the SIGALRM that will reach the signal
+ * handler if we don't return here fast enough. */
+ if (server.watchdog_period) watchdogScheduleSignal(server.watchdog_period);
+
/* We take a cached value of the unix time in the global state because
* with virtual memory and aging there is to store the current time
* in objects at every object access, and accuracy is not needed.
zmalloc_used_memory());
}
- /* Close connections of timedout clients */
- if ((server.maxidletime && !(loops % 100)) || server.bpop_blocked_clients)
- closeTimedoutClients();
+ /* We need to do a few operations on clients asynchronously. */
+ clientsCron();
/* Start a scheduled AOF rewrite if this was requested by the user while
* a BGSAVE was in progress. */
updateDictResizePolicy();
}
} else {
- time_t now = time(NULL);
-
/* If there is not a background saving/rewrite in progress check if
* we have to save/rewrite now */
for (j = 0; j < server.saveparamslen; j++) {
struct saveparam *sp = server.saveparams+j;
if (server.dirty >= sp->changes &&
- now-server.lastsave > sp->seconds) {
+ server.unixtime-server.lastsave > sp->seconds) {
redisLog(REDIS_NOTICE,"%d changes in %d seconds. Saving...",
sp->changes, sp->seconds);
rdbSaveBackground(server.rdb_filename);
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"));
+ "-MISCONF Redis is configured to save RDB snapshots, but is currently not able to persist on disk. Commands that may modify the data set are disabled. Please check Redis logs for details about the error.\r\n"));
+ shared.roslaveerr = createObject(REDIS_STRING,sdsnew(
+ "-READONLY You can't write against a read only slave.\r\n"));
+ shared.oomerr = createObject(REDIS_STRING,sdsnew(
+ "-OOM command not allowed when used memory > 'maxmemory'.\r\n"));
shared.space = createObject(REDIS_STRING,sdsnew(" "));
shared.colon = createObject(REDIS_STRING,sdsnew(":"));
shared.plus = createObject(REDIS_STRING,sdsnew("+"));
server.aof_rewrite_base_size = 0;
server.aof_rewrite_scheduled = 0;
server.aof_last_fsync = time(NULL);
+ server.aof_delayed_fsync = 0;
server.aof_fd = -1;
server.aof_selected_db = -1; /* Make sure the first time will not match */
server.aof_flush_postponed_start = 0;
server.repl_state = REDIS_REPL_NONE;
server.repl_syncio_timeout = REDIS_REPL_SYNCIO_TIMEOUT;
server.repl_serve_stale_data = 1;
+ server.repl_slave_ro = 1;
server.repl_down_since = -1;
/* Client output buffer limits */
server.slowlog_log_slower_than = REDIS_SLOWLOG_LOG_SLOWER_THAN;
server.slowlog_max_len = REDIS_SLOWLOG_MAX_LEN;
- /* Assert */
+ /* Debugging */
server.assert_failed = "<no assertion failed>";
server.assert_file = "<no file>";
server.assert_line = 0;
server.bug_report_start = 0;
+ server.watchdog_period = 0;
}
/* This function will try to raise the max number of open files accordingly to
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'");
+ addReply(c, shared.oomerr);
return REDIS_OK;
}
}
return REDIS_OK;
}
+ /* Don't accept wirte commands if this is a read only slave. But
+ * accept write commands if this is our master. */
+ if (server.masterhost && server.repl_slave_ro &&
+ !(c->flags & REDIS_MASTER) &&
+ c->cmd->flags & REDIS_CMD_WRITE)
+ {
+ addReply(c, shared.roslaveerr);
+ return REDIS_OK;
+ }
+
/* Only allow SUBSCRIBE and UNSUBSCRIBE in the context of Pub/Sub */
if ((dictSize(c->pubsub_channels) > 0 || listLength(c->pubsub_patterns) > 0)
&&
* on memory corruption problems. */
sds genRedisInfoString(char *section) {
sds info = sdsempty();
- time_t uptime = time(NULL)-server.stat_starttime;
+ time_t uptime = server.unixtime-server.stat_starttime;
int j, numcommands;
struct rusage self_ru, c_ru;
unsigned long lol, bib;
"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",
+ "aof_pending_bio_fsync:%llu\r\n"
+ "aof_delayed_fsync:%lu\r\n",
(long long) server.aof_current_size,
(long long) server.aof_rewrite_base_size,
server.aof_rewrite_scheduled,
sdslen(server.aof_buf),
- bioPendingJobsOfType(REDIS_BIO_AOF_FSYNC));
+ bioPendingJobsOfType(REDIS_BIO_AOF_FSYNC),
+ server.aof_delayed_fsync);
}
if (server.loading) {
perc = ((double)server.loading_loaded_bytes /
server.loading_total_bytes) * 100;
- elapsed = time(NULL)-server.loading_start_time;
+ elapsed = server.unixtime-server.loading_start_time;
if (elapsed == 0) {
eta = 1; /* A fake 1 second figure if we don't have
enough info */
(server.repl_state == REDIS_REPL_CONNECTED) ?
"up" : "down",
server.master ?
- ((int)(time(NULL)-server.master->lastinteraction)) : -1,
+ ((int)(server.unixtime-server.master->lastinteraction)) : -1,
server.repl_state == REDIS_REPL_TRANSFER
);
"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)
+ (int)(server.unixtime-server.repl_transfer_lastio)
);
}
if (server.repl_state != REDIS_REPL_CONNECTED) {
info = sdscatprintf(info,
"master_link_down_since_seconds:%ld\r\n",
- (long)time(NULL)-server.repl_down_since);
+ (long)server.unixtime-server.repl_down_since);
}
}
info = sdscatprintf(info,
}
void version() {
- printf("Redis server version %s (%s:%d)\n", REDIS_VERSION,
- redisGitSHA1(), atoi(redisGitDirty()) > 0);
+ printf("Redis server v=%s sha=%s:%d malloc=%s\n", REDIS_VERSION,
+ redisGitSHA1(), atoi(redisGitDirty()) > 0, ZMALLOC_LIB);
exit(0);
}
fprintf(stderr,"Usage: ./redis-server [/path/to/redis.conf] [options]\n");
fprintf(stderr," ./redis-server - (read config from stdin)\n");
fprintf(stderr," ./redis-server -v or --version\n");
- fprintf(stderr," ./redis-server -h or --help\n\n");
+ fprintf(stderr," ./redis-server -h or --help\n");
+ fprintf(stderr," ./redis-server --test-memory <megabytes>\n\n");
fprintf(stderr,"Examples:\n");
fprintf(stderr," ./redis-server (run the server with default conf)\n");
fprintf(stderr," ./redis-server /etc/redis/6379.conf\n");
static void sigtermHandler(int sig) {
REDIS_NOTUSED(sig);
- redisLog(REDIS_WARNING,"Received SIGTERM, scheduling shutdown...");
+ redisLogFromHandler(REDIS_WARNING,"Received SIGTERM, scheduling shutdown...");
server.shutdown_asap = 1;
}
return;
}
+void memtest(size_t megabytes, int passes);
+
int main(int argc, char **argv) {
long long start;
struct timeval tv;
strcmp(argv[1], "--version") == 0) version();
if (strcmp(argv[1], "--help") == 0 ||
strcmp(argv[1], "-h") == 0) usage();
+ if (strcmp(argv[1], "--test-memory") == 0) {
+ if (argc == 3) {
+ memtest(atoi(argv[2]),50);
+ exit(0);
+ } else {
+ fprintf(stderr,"Please specify the amount of memory to test in megabytes.\n");
+ fprintf(stderr,"Example: ./redis-server --test-memory 4096\n\n");
+ exit(1);
+ }
+ }
+
/* First argument is the config file name? */
if (argv[j][0] != '-' || argv[j][1] != '-')
configfile = argv[j++];
projects / redis.git / blobdiff