Diskless replication: redis.conf and CONFIG SET/GET support.

src/config.c

@@ -267,6 +267,10 @@ void loadServerConfigFromString(char *config) {
             if ((server.repl_disable_tcp_nodelay = yesnotoi(argv[1])) == -1) {
                 err = "argument must be 'yes' or 'no'"; goto loaderr;
             }
+        } else if (!strcasecmp(argv[0],"repl-diskless-sync") && argc==2) {
+            if ((server.repl_diskless_sync = yesnotoi(argv[1])) == -1) {
+                err = "argument must be 'yes' or 'no'"; goto loaderr;
+            }
         } else if (!strcasecmp(argv[0],"repl-backlog-size") && argc == 2) {
             long long size = memtoll(argv[1],NULL);
             if (size <= 0) {
@@ -281,7 +285,7 @@ void loadServerConfigFromString(char *config) {
                 goto loaderr;
             }
         } else if (!strcasecmp(argv[0],"masterauth") && argc == 2) {
-        	server.masterauth = zstrdup(argv[1]);
+            server.masterauth = zstrdup(argv[1]);
         } else if (!strcasecmp(argv[0],"slave-serve-stale-data") && argc == 2) {
             if ((server.repl_serve_stale_data = yesnotoi(argv[1])) == -1) {
                 err = "argument must be 'yes' or 'no'"; goto loaderr;
@@ -864,6 +868,11 @@ void configSetCommand(redisClient *c) {
 
         if (yn == -1) goto badfmt;
         server.repl_disable_tcp_nodelay = yn;
+    } else if (!strcasecmp(c->argv[2]->ptr,"repl-diskless-sync")) {
+        int yn = yesnotoi(o->ptr);
+
+        if (yn == -1) goto badfmt;
+        server.repl_diskless_sync = yn;
     } else if (!strcasecmp(c->argv[2]->ptr,"slave-priority")) {
         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
             ll < 0) goto badfmt;
@@ -998,6 +1007,8 @@ void configGetCommand(redisClient *c) {
     config_get_bool_field("activerehashing", server.activerehashing);
     config_get_bool_field("repl-disable-tcp-nodelay",
             server.repl_disable_tcp_nodelay);
+    config_get_bool_field("repl-diskless-sync",
+            server.repl_diskless_sync);
     config_get_bool_field("aof-rewrite-incremental-fsync",
             server.aof_rewrite_incremental_fsync);
     config_get_bool_field("aof-load-truncated",
@@ -1722,6 +1733,7 @@ int rewriteConfig(char *path) {
     rewriteConfigBytesOption(state,"repl-backlog-size",server.repl_backlog_size,REDIS_DEFAULT_REPL_BACKLOG_SIZE);
     rewriteConfigBytesOption(state,"repl-backlog-ttl",server.repl_backlog_time_limit,REDIS_DEFAULT_REPL_BACKLOG_TIME_LIMIT);
     rewriteConfigYesNoOption(state,"repl-disable-tcp-nodelay",server.repl_disable_tcp_nodelay,REDIS_DEFAULT_REPL_DISABLE_TCP_NODELAY);
+    rewriteConfigYesNoOption(state,"repl-diskless-sync",server.repl_diskless_sync,REDIS_DEFAULT_REPL_DISKLESS_SYNC);
     rewriteConfigNumericalOption(state,"slave-priority",server.slave_priority,REDIS_DEFAULT_SLAVE_PRIORITY);
     rewriteConfigNumericalOption(state,"min-slaves-to-write",server.repl_min_slaves_to_write,REDIS_DEFAULT_MIN_SLAVES_TO_WRITE);
     rewriteConfigNumericalOption(state,"min-slaves-max-lag",server.repl_min_slaves_max_lag,REDIS_DEFAULT_MIN_SLAVES_MAX_LAG);

src/redis.c

@@ -1394,7 +1394,7 @@ void initServerConfig(void) {
     server.repl_slave_ro = REDIS_DEFAULT_SLAVE_READ_ONLY;
     server.repl_down_since = 0; /* Never connected, repl is down since EVER. */
     server.repl_disable_tcp_nodelay = REDIS_DEFAULT_REPL_DISABLE_TCP_NODELAY;
-    server.repl_diskless_sync = REDIS_DEFAULT_RDB_DISKLESS_SYNC;
+    server.repl_diskless_sync = REDIS_DEFAULT_REPL_DISKLESS_SYNC;
     server.slave_priority = REDIS_DEFAULT_SLAVE_PRIORITY;
     server.master_repl_offset = 0;
 

src/redis.h

@@ -114,8 +114,8 @@ typedef long long mstime_t; /* millisecond time type. */
 #define REDIS_DEFAULT_RDB_COMPRESSION 1
 #define REDIS_DEFAULT_RDB_CHECKSUM 1
 #define REDIS_DEFAULT_RDB_FILENAME "dump.rdb"
-#define REDIS_DEFAULT_RDB_DISKLESS_SYNC 0
-#define REDIS_DEFAULT_RDB_DISKLESS_SYNC_DELAY 5
+#define REDIS_DEFAULT_REPL_DISKLESS_SYNC 0
+#define REDIS_DEFAULT_REPL_DISKLESS_SYNC_DELAY 5
 #define REDIS_DEFAULT_SLAVE_SERVE_STALE_DATA 1
 #define REDIS_DEFAULT_SLAVE_READ_ONLY 1
 #define REDIS_DEFAULT_REPL_DISABLE_TCP_NODELAY 0

src/replication.c

@@ -1802,7 +1802,8 @@ void replicationCron(void) {
             }
         }
 
-        if (slaves_waiting && max_idle > REDIS_DEFAULT_RDB_DISKLESS_SYNC_DELAY) {
+        if (slaves_waiting && max_idle > REDIS_DEFAULT_REPL_DISKLESS_SYNC_DELAY)
+        {
             /* Let's start a BGSAVE with disk target. */
             if (startBgsaveForReplication() == REDIS_OK) {
                 /* It started! We need to change the state of slaves