#define REDIS_SLOWLOG_MAX_LEN 128
#define REDIS_MAX_CLIENTS 10000
#define REDIS_AUTHPASS_MAX_LEN 512
-
+#define REDIS_DEFAULT_SLAVE_PRIORITY 100
#define REDIS_REPL_TIMEOUT 60
#define REDIS_REPL_PING_SLAVE_PERIOD 10
-
#define REDIS_RUN_ID_SIZE 40
#define REDIS_OPS_SEC_SAMPLES 16
#define REDIS_CMD_NOSCRIPT 64 /* "s" flag */
#define REDIS_CMD_RANDOM 128 /* "R" flag */
#define REDIS_CMD_SORT_FOR_SCRIPT 256 /* "S" flag */
+#define REDIS_CMD_LOADING 512 /* "l" flag */
+#define REDIS_CMD_STALE 1024 /* "t" flag */
/* Object types */
#define REDIS_STRING 0
#define REDIS_REPL_NONE 0 /* No active replication */
#define REDIS_REPL_CONNECT 1 /* Must connect to master */
#define REDIS_REPL_CONNECTING 2 /* Connecting to master */
-#define REDIS_REPL_TRANSFER 3 /* Receiving .rdb from master */
-#define REDIS_REPL_CONNECTED 4 /* Connected to master */
+#define REDIS_REPL_RECEIVE_PONG 3 /* Wait for PING reply */
+#define REDIS_REPL_TRANSFER 4 /* Receiving .rdb from master */
+#define REDIS_REPL_CONNECTED 5 /* Connected to master */
/* Synchronous read timeout - slave side */
#define REDIS_REPL_SYNCIO_TIMEOUT 5
#define REDIS_PROPAGATE_AOF 1
#define REDIS_PROPAGATE_REPL 2
+/* Using the following macro you can run code inside serverCron() with the
+ * specified period, specified in milliseconds.
+ * The actual resolution depends on REDIS_HZ. */
+#define run_with_period(_ms_) if (!(server.cronloops%((_ms_)/(1000/REDIS_HZ))))
+
/* We can print the stacktrace, so our assert is defined this way: */
#define redisAssertWithInfo(_c,_o,_e) ((_e)?(void)0 : (_redisAssertWithInfo(_c,_o,#_e,__FILE__,__LINE__),_exit(1)))
#define redisAssert(_e) ((_e)?(void)0 : (_redisAssert(#_e,__FILE__,__LINE__),_exit(1)))
int arch_bits; /* 32 or 64 depending on sizeof(long) */
int cronloops; /* Number of times the cron function run */
char runid[REDIS_RUN_ID_SIZE+1]; /* ID always different at every exec. */
+ int sentinel_mode; /* True if this instance is a Sentinel. */
/* Networking */
int port; /* TCP listening port */
char *bindaddr; /* Bind address or NULL */
time_t aof_last_fsync; /* UNIX time of last fsync() */
time_t aof_rewrite_time_last; /* Time used by last AOF rewrite run. */
time_t aof_rewrite_time_start; /* Current AOF rewrite start time. */
+ int aof_lastbgrewrite_status; /* REDIS_OK or REDIS_ERR */
unsigned long aof_delayed_fsync; /* delayed AOF fsync() counter */
/* RDB persistence */
long long dirty; /* Changes to DB from the last save */
char *masterauth; /* AUTH with this password with master */
char *masterhost; /* Hostname of master */
int masterport; /* Port of master */
- int repl_ping_slave_period; /* Master pings the salve every N seconds */
+ int repl_ping_slave_period; /* Master pings the slave every N seconds */
int repl_timeout; /* Timeout after N seconds of master idle */
redisClient *master; /* Client that is master for this slave */
int repl_syncio_timeout; /* Timeout for synchronous I/O calls */
int repl_state; /* Replication status if the instance is a slave */
- off_t repl_transfer_left; /* Bytes left reading .rdb */
+ off_t repl_transfer_size; /* Size of RDB to read from master during sync. */
+ off_t repl_transfer_read; /* Amount of RDB read from master during sync. */
+ off_t repl_transfer_last_fsync_off; /* Offset when we fsync-ed last time. */
int repl_transfer_s; /* Slave -> Master SYNC socket */
int repl_transfer_fd; /* Slave -> Master SYNC temp file descriptor */
char *repl_transfer_tmpfile; /* Slave-> master SYNC temp file name */
int repl_serve_stale_data; /* Serve stale data when link is down? */
int repl_slave_ro; /* Slave is read only? */
time_t repl_down_since; /* Unix time at which link with master went down */
+ int slave_priority; /* Reported in INFO and used by Sentinel. */
/* Limits */
unsigned int maxclients; /* Max number of simultaneous clients */
unsigned long long maxmemory; /* Max number of memory bytes to use */
list *unblocked_clients; /* list of clients to unblock before next loop */
/* Sort parameters - qsort_r() is only available under BSD so we
* have to take this state global, in order to pass it to sortCompare() */
- int sort_dontsort;
int sort_desc;
int sort_alpha;
int sort_bypattern;
clusterNode *getNodeByQuery(redisClient *c, struct redisCommand *cmd, robj **argv, int argc, int *hashslot, int *ask);
void clusterPropagatePublish(robj *channel, robj *message);
+/* Sentinel */
+void initSentinelConfig(void);
+void initSentinel(void);
+void sentinelTimer(void);
+char *sentinelHandleConfiguration(char **argv, int argc);
+
/* Scripting */
void scriptingInit(void);
void disableWatchdog(void);
void watchdogScheduleSignal(int period);
void redisLogHexDump(int level, char *descr, void *value, size_t len);
+
+#define redisDebug(fmt, ...) \
+ printf("DEBUG %s:%d > " fmt "\n", __FILE__, __LINE__, __VA_ARGS__)
+#define redisDebugMark() \
+ printf("-- MARK %s:%d --\n", __FILE__, __LINE__)
+
#endif
}
/* Asynchronously read the SYNC payload we receive from a master */
+#define REPL_MAX_WRITTEN_BEFORE_FSYNC (1024*1024*8) /* 8 MB */
void readSyncBulkPayload(aeEventLoop *el, int fd, void *privdata, int mask) {
char buf[4096];
ssize_t nread, readlen;
+ off_t left;
REDIS_NOTUSED(el);
REDIS_NOTUSED(privdata);
REDIS_NOTUSED(mask);
- /* If repl_transfer_left == -1 we still have to read the bulk length
+ /* If repl_transfer_size == -1 we still have to read the bulk length
* from the master reply. */
- if (server.repl_transfer_left == -1) {
+ if (server.repl_transfer_size == -1) {
if (syncReadLine(fd,buf,1024,server.repl_syncio_timeout*1000) == -1) {
redisLog(REDIS_WARNING,
"I/O error reading bulk count from MASTER: %s",
redisLog(REDIS_WARNING,"Bad protocol from MASTER, the first byte is not '$', are you sure the host and port are right?");
goto error;
}
- server.repl_transfer_left = strtol(buf+1,NULL,10);
+ server.repl_transfer_size = strtol(buf+1,NULL,10);
redisLog(REDIS_NOTICE,
"MASTER <-> SLAVE sync: receiving %ld bytes from master",
- server.repl_transfer_left);
+ server.repl_transfer_size);
return;
}
/* Read bulk data */
- readlen = (server.repl_transfer_left < (signed)sizeof(buf)) ?
- server.repl_transfer_left : (signed)sizeof(buf);
+ left = server.repl_transfer_size - server.repl_transfer_read;
+ readlen = (left < (signed)sizeof(buf)) ? left : (signed)sizeof(buf);
nread = read(fd,buf,readlen);
if (nread <= 0) {
redisLog(REDIS_WARNING,"I/O error trying to sync with MASTER: %s",
redisLog(REDIS_WARNING,"Write error or short write writing to the DB dump file needed for MASTER <-> SLAVE synchronization: %s", strerror(errno));
goto error;
}
- server.repl_transfer_left -= nread;
+ server.repl_transfer_read += nread;
+
+ /* Sync data on disk from time to time, otherwise at the end of the transfer
+ * we may suffer a big delay as the memory buffers are copied into the
+ * actual disk. */
+ if (server.repl_transfer_read >=
+ server.repl_transfer_last_fsync_off + REPL_MAX_WRITTEN_BEFORE_FSYNC)
+ {
+ off_t sync_size = server.repl_transfer_read -
+ server.repl_transfer_last_fsync_off;
+ rdb_fsync_range(server.repl_transfer_fd,
+ server.repl_transfer_last_fsync_off, sync_size);
+ server.repl_transfer_last_fsync_off += sync_size;
+ }
+
/* Check if the transfer is now complete */
- if (server.repl_transfer_left == 0) {
+ if (server.repl_transfer_read == server.repl_transfer_size) {
if (rename(server.repl_transfer_tmpfile,server.rdb_filename) == -1) {
redisLog(REDIS_WARNING,"Failed trying to rename the temp DB into dump.rdb in MASTER <-> SLAVE synchronization: %s", strerror(errno));
replicationAbortSyncTransfer();
void syncWithMaster(aeEventLoop *el, int fd, void *privdata, int mask) {
char tmpfile[256], *err;
int dfd, maxtries = 5;
+ int sockerr = 0;
+ socklen_t errlen = sizeof(sockerr);
REDIS_NOTUSED(el);
REDIS_NOTUSED(privdata);
REDIS_NOTUSED(mask);
return;
}
- redisLog(REDIS_NOTICE,"Non blocking connect for SYNC fired the event.");
- /* This event should only be triggered once since it is used to have a
- * non-blocking connect(2) to the master. It has been triggered when this
- * function is called, so we can delete it. */
- aeDeleteFileEvent(server.el,fd,AE_READABLE|AE_WRITABLE);
+ /* Check for errors in the socket. */
+ if (getsockopt(fd, SOL_SOCKET, SO_ERROR, &sockerr, &errlen) == -1)
+ sockerr = errno;
+ if (sockerr) {
+ aeDeleteFileEvent(server.el,fd,AE_READABLE|AE_WRITABLE);
+ redisLog(REDIS_WARNING,"Error condition on socket for SYNC: %s",
+ strerror(sockerr));
+ goto error;
+ }
+
+ /* If we were connecting, it's time to send a non blocking PING, we want to
+ * make sure the master is able to reply before going into the actual
+ * replication process where we have long timeouts in the order of
+ * seconds (in the meantime the slave would block). */
+ if (server.repl_state == REDIS_REPL_CONNECTING) {
+ redisLog(REDIS_NOTICE,"Non blocking connect for SYNC fired the event.");
+ /* Delete the writable event so that the readable event remains
+ * registered and we can wait for the PONG reply. */
+ aeDeleteFileEvent(server.el,fd,AE_WRITABLE);
+ server.repl_state = REDIS_REPL_RECEIVE_PONG;
+ /* Send the PING, don't check for errors at all, we have the timeout
+ * that will take care about this. */
+ syncWrite(fd,"PING\r\n",6,100);
+ return;
+ }
+
+ /* Receive the PONG command. */
+ if (server.repl_state == REDIS_REPL_RECEIVE_PONG) {
+ char buf[1024];
+
+ /* Delete the readable event, we no longer need it now that there is
+ * the PING reply to read. */
+ aeDeleteFileEvent(server.el,fd,AE_READABLE);
+
+ /* Read the reply with explicit timeout. */
+ buf[0] = '\0';
+ if (syncReadLine(fd,buf,sizeof(buf),
+ server.repl_syncio_timeout*1000) == -1)
+ {
+ redisLog(REDIS_WARNING,
+ "I/O error reading PING reply from master: %s",
+ strerror(errno));
+ goto error;
+ }
+
+ /* We don't care about the reply, it can be +PONG or an error since
+ * the server requires AUTH. As long as it replies correctly, it's
+ * fine from our point of view. */
+ if (buf[0] != '-' && buf[0] != '+') {
+ redisLog(REDIS_WARNING,"Unexpected reply to PING from master.");
+ goto error;
+ } else {
+ redisLog(REDIS_NOTICE,
+ "Master replied to PING, replication can continue...");
+ }
+ }
/* AUTH with the master if required. */
if(server.masterauth) {
}
server.repl_state = REDIS_REPL_TRANSFER;
- server.repl_transfer_left = -1;
+ server.repl_transfer_size = -1;
+ server.repl_transfer_read = 0;
+ server.repl_transfer_last_fsync_off = 0;
server.repl_transfer_fd = dfd;
server.repl_transfer_lastio = server.unixtime;
server.repl_transfer_tmpfile = zstrdup(tmpfile);
return;
error:
- server.repl_state = REDIS_REPL_CONNECT;
close(fd);
+ server.repl_transfer_s = -1;
+ server.repl_state = REDIS_REPL_CONNECT;
return;
}
void undoConnectWithMaster(void) {
int fd = server.repl_transfer_s;
- redisAssert(server.repl_state == REDIS_REPL_CONNECTING);
+ redisAssert(server.repl_state == REDIS_REPL_CONNECTING ||
+ server.repl_state == REDIS_REPL_RECEIVE_PONG);
aeDeleteFileEvent(server.el,fd,AE_READABLE|AE_WRITABLE);
close(fd);
server.repl_transfer_s = -1;
if (server.master) freeClient(server.master);
if (server.repl_state == REDIS_REPL_TRANSFER)
replicationAbortSyncTransfer();
- else if (server.repl_state == REDIS_REPL_CONNECTING)
+ else if (server.repl_state == REDIS_REPL_CONNECTING ||
+ server.repl_state == REDIS_REPL_RECEIVE_PONG)
undoConnectWithMaster();
server.repl_state = REDIS_REPL_NONE;
redisLog(REDIS_NOTICE,"MASTER MODE enabled (user request)");
void replicationCron(void) {
/* Non blocking connection timeout? */
- if (server.masterhost && server.repl_state == REDIS_REPL_CONNECTING &&
+ if (server.masterhost &&
+ (server.repl_state == REDIS_REPL_CONNECTING ||
+ server.repl_state == REDIS_REPL_RECEIVE_PONG) &&
(time(NULL)-server.repl_transfer_lastio) > server.repl_timeout)
{
redisLog(REDIS_WARNING,"Timeout connecting to the MASTER...");
* So slaves can implement an explicit timeout to masters, and will
* be able to detect a link disconnection even if the TCP connection
* will not actually go down. */
- if (!(server.cronloops % (server.repl_ping_slave_period*10))) {
+ if (!(server.cronloops % (server.repl_ping_slave_period * REDIS_HZ))) {
listIter li;
listNode *ln;
projects / redis.git / commitdiff
