disk store logged messages improved

[redis.git] / src / replication.c

diff --git a/src/replication.c b/src/replication.c
index e58a9013d8852037a779c3fb2021177ea5712b19..9f8d9274827f36cca979c1838211adab27ea19f2 100644 (file)
--- a/src/replication.c
+++ b/src/replication.c
@@ -88,7 +88,7 @@ void replicationFeedMonitors(list *monitors, int dictid, robj **argv, int argc)
     struct timeval tv;
 
     gettimeofday(&tv,NULL);
-    cmdrepr = sdscatprintf(cmdrepr,"%ld.%ld ",(long)tv.tv_sec,(long)tv.tv_usec);
+    cmdrepr = sdscatprintf(cmdrepr,"%ld.%06ld ",(long)tv.tv_sec,(long)tv.tv_usec);
     if (dictid != 0) cmdrepr = sdscatprintf(cmdrepr,"(db %d) ", dictid);
 
     for (j = 0; j < argc; j++) {
@@ -306,11 +306,43 @@ void replicationAbortSyncTransfer(void) {
 
 /* Asynchronously read the SYNC payload we receive from a master */
 void readSyncBulkPayload(aeEventLoop *el, int fd, void *privdata, int mask) {
-    unsigned char buf[4096]
-    size_t nread, readlen;
+    char buf[4096];
+    ssize_t nread, readlen;
+    REDIS_NOTUSED(el);
+    REDIS_NOTUSED(privdata);
+    REDIS_NOTUSED(mask);
 
-    readlen = (server.repl_transfer_left < sizeof(buf)) ?
-        server.repl_transfer_left : sizeof(buf);
+    /* If repl_transfer_left == -1 we still have to read the bulk length
+     * from the master reply. */
+    if (server.repl_transfer_left == -1) {
+        if (syncReadLine(fd,buf,1024,3600) == -1) {
+            redisLog(REDIS_WARNING,
+                "I/O error reading bulk count from MASTER: %s",
+                strerror(errno));
+            replicationAbortSyncTransfer();
+            return;
+        }
+        if (buf[0] == '-') {
+            redisLog(REDIS_WARNING,
+                "MASTER aborted replication with an error: %s",
+                buf+1);
+            replicationAbortSyncTransfer();
+            return;
+        } else if (buf[0] != '$') {
+            redisLog(REDIS_WARNING,"Bad protocol from MASTER, the first byte is not '$', are you sure the host and port are right?");
+            replicationAbortSyncTransfer();
+            return;
+        }
+        server.repl_transfer_left = strtol(buf+1,NULL,10);
+        redisLog(REDIS_NOTICE,
+            "MASTER <-> SLAVE sync: receiving %ld bytes from master",
+            server.repl_transfer_left);
+        return;
+    }
+
+    /* Read bulk data */
+    readlen = (server.repl_transfer_left < (signed)sizeof(buf)) ?
+        server.repl_transfer_left : (signed)sizeof(buf);
     nread = read(fd,buf,readlen);
     if (nread <= 0) {
         redisLog(REDIS_WARNING,"I/O error trying to sync with MASTER: %s",
@@ -332,26 +364,31 @@ void readSyncBulkPayload(aeEventLoop *el, int fd, void *privdata, int mask) {
             replicationAbortSyncTransfer();
             return;
         }
+        redisLog(REDIS_NOTICE, "MASTER <-> SLAVE sync: Loading DB in memory");
         emptyDb();
+        /* Before loading the DB into memory we need to delete the readable
+         * handler, otherwise it will get called recursively since
+         * rdbLoad() will call the event loop to process events from time to
+         * time for non blocking loading. */
+        aeDeleteFileEvent(server.el,server.repl_transfer_s,AE_READABLE);
         if (rdbLoad(server.dbfilename) != REDIS_OK) {
             redisLog(REDIS_WARNING,"Failed trying to load the MASTER synchronization DB from disk");
             replicationAbortSyncTransfer();
             return;
         }
         /* Final setup of the connected slave <- master link */
-        aeDeleteFileEvent(server.el,server.repl_transfer_s,AE_READABLE);
         zfree(server.repl_transfer_tmpfile);
         close(server.repl_transfer_fd);
         server.master = createClient(server.repl_transfer_s);
         server.master->flags |= REDIS_MASTER;
         server.master->authenticated = 1;
         server.replstate = REDIS_REPL_CONNECTED;
+        redisLog(REDIS_NOTICE, "MASTER <-> SLAVE sync: Finished with success");
     }
 }
 
 int syncWithMaster(void) {
     char buf[1024], tmpfile[256], authcmd[1024];
-    off_t dumpsize;
     int fd = anetTcpConnect(NULL,server.masterhost,server.masterport);
     int dfd, maxtries = 5;
 
@@ -391,26 +428,8 @@ int syncWithMaster(void) {
             strerror(errno));
         return REDIS_ERR;
     }
-    /* Read the bulk write count */
-    if (syncReadLine(fd,buf,1024,3600) == -1) {
-        close(fd);
-        redisLog(REDIS_WARNING,"I/O error reading bulk count from MASTER: %s",
-            strerror(errno));
-        return REDIS_ERR;
-    }
-    if (buf[0] == '-') {
-        close(fd);
-        redisLog(REDIS_WARNING,"MASTER aborted replication with an error: %s",
-            buf+1);
-        return REDIS_ERR;
-    } else if (buf[0] != '$') {
-        close(fd);
-        redisLog(REDIS_WARNING,"Bad protocol from MASTER, the first byte is not '$', are you sure the host and port are right?");
-        return REDIS_ERR;
-    }
-    dumpsize = strtol(buf+1,NULL,10);
-    redisLog(REDIS_NOTICE,"Receiving %ld bytes data dump from MASTER",dumpsize);
-    /* Read the bulk write data on a temp file */
+
+    /* Prepare a suitable temp file for bulk transfer */
     while(maxtries--) {
         snprintf(tmpfile,256,
             "temp-%d.%ld.rdb",(int)time(NULL),(long int)getpid());
@@ -425,15 +444,15 @@ int syncWithMaster(void) {
     }
 
     /* Setup the non blocking download of the bulk file. */
-    if (aeCreateFileEvent(server.el, fd, AE_READABLE,readSyncBulkPayload) ==
-        AE_ERR)
+    if (aeCreateFileEvent(server.el, fd, AE_READABLE, readSyncBulkPayload, NULL)
+            == AE_ERR)
     {
         close(fd);
         redisLog(REDIS_WARNING,"Can't create readable event for SYNC");
         return REDIS_ERR;
     }
     server.replstate = REDIS_REPL_TRANSFER;
-    server.repl_transfer_left = dumpsize;
+    server.repl_transfer_left = -1;
     server.repl_transfer_s = fd;
     server.repl_transfer_fd = dfd;
     server.repl_transfer_lastio = time(NULL);
@@ -481,10 +500,10 @@ void replicationCron(void) {
     }
 
     /* Check if we should connect to a MASTER */
-    if (server.replstate == REDIS_REPL_CONNECT && !(loops % 10)) {
+    if (server.replstate == REDIS_REPL_CONNECT) {
         redisLog(REDIS_NOTICE,"Connecting to MASTER...");
         if (syncWithMaster() == REDIS_OK) {
-            redisLog(REDIS_NOTICE,"MASTER <-> SLAVE sync succeeded");
+            redisLog(REDIS_NOTICE,"MASTER <-> SLAVE sync started: SYNC sent");
             if (server.appendonly) rewriteAppendOnlyFileBackground();
         }
     }