Merge remote-tracking branch 'origin/unstable' into unstable

[redis.git] / src / redis.c

diff --git a/src/redis.c b/src/redis.c
index 839711381e6f107b28dcab5fc1997e080c7a67f3..28240b03d7eee3a7b696bfe670d2ee4fc5d0d459 100644 (file)
--- a/src/redis.c
+++ b/src/redis.c
@@ -954,6 +954,43 @@ void initServerConfig() {
     server.bug_report_start = 0;
 }
 
+/* This function will try to raise the max number of open files accordingly to
+ * the configured max number of clients. It will also account for 32 additional
+ * file descriptors as we need a few more for persistence, listening
+ * sockets, log files and so forth.
+ *
+ * If it will not be possible to set the limit accordingly to the configured
+ * max number of clients, the function will do the reverse setting
+ * server.maxclients to the value that we can actually handle. */
+void adjustOpenFilesLimit(void) {
+    rlim_t maxfiles = server.maxclients+32;
+    struct rlimit limit;
+
+    if (maxfiles < 1024) maxfiles = 1024;
+    if (getrlimit(RLIMIT_NOFILE,&limit) == -1) {
+        redisLog(REDIS_WARNING,"Unable to obtain the current NOFILE limit (%s), assuming 1024 and setting the max clients configuration accordingly.",
+            strerror(errno));
+        server.maxclients = 1024-32;
+    } else {
+        rlim_t oldlimit = limit.rlim_cur;
+
+        /* Set the max number of files if the current limit is not enough
+         * for our needs. */
+        if (oldlimit < maxfiles) {
+            limit.rlim_cur = maxfiles;
+            limit.rlim_max = maxfiles;
+            if (setrlimit(RLIMIT_NOFILE,&limit) == -1) {
+                server.maxclients = oldlimit-32;
+                redisLog(REDIS_WARNING,"Unable to set the max number of files limit to %d (%s), setting the max clients configuration to %d.",
+                    (int) maxfiles, strerror(errno), (int) server.maxclients);
+            } else {
+                redisLog(REDIS_NOTICE,"Max number of open files set to %d",
+                    (int) maxfiles);
+            }
+        }
+    }
+}
+
 void initServer() {
     int j;
 
@@ -972,7 +1009,8 @@ void initServer() {
     server.unblocked_clients = listCreate();
 
     createSharedObjects();
-    server.el = aeCreateEventLoop();
+    adjustOpenFilesLimit();
+    server.el = aeCreateEventLoop(server.maxclients+1024);
     server.db = zmalloc(sizeof(redisDb)*server.dbnum);
 
     if (server.port != 0) {
@@ -1045,38 +1083,6 @@ void initServer() {
     bioInit();
     srand(time(NULL)^getpid());
 
-    /* Try to raise the max number of open files accordingly to the
-     * configured max number of clients. Also account for 32 additional
-     * file descriptors as we need a few more for persistence, listening
-     * sockets, log files and so forth. */
-    {
-        rlim_t maxfiles = server.maxclients+32;
-        struct rlimit limit;
-
-        if (maxfiles < 1024) maxfiles = 1024;
-        if (getrlimit(RLIMIT_NOFILE,&limit) == -1) {
-            redisLog(REDIS_WARNING,"Unable to obtain the current NOFILE limit (%s), assuming 1024 and setting the max clients configuration accordingly.",
-                strerror(errno));
-            server.maxclients = 1024-32;
-        } else {
-            rlim_t oldlimit = limit.rlim_cur;
-
-            /* Set the max number of files if the current limit is not enough
-             * for our needs. */
-            if (oldlimit < maxfiles) {
-                limit.rlim_cur = maxfiles;
-                limit.rlim_max = maxfiles;
-                if (setrlimit(RLIMIT_NOFILE,&limit) == -1) {
-                    server.maxclients = oldlimit-32;
-                    redisLog(REDIS_WARNING,"Unable to set the max number of files limit to %d (%s), setting the max clients configuration to %d.",
-                        (int) maxfiles, strerror(errno), (int) server.maxclients);
-                } else {
-                    redisLog(REDIS_NOTICE,"Max number of open files set to %d",
-                        (int) maxfiles);
-                }
-            }
-        }
-    }
 }
 
 /* Populates the Redis Command Table starting from the hard coded list
@@ -1611,6 +1617,37 @@ sds genRedisInfoString(char *section) {
         info = sdscatprintf(info,
             "connected_slaves:%d\r\n",
             listLength(server.slaves));
+        if (listLength(server.slaves)) {
+            int slaveid = 0;
+            listNode *ln;
+            listIter li;
+
+            listRewind(server.slaves,&li);
+            while((ln = listNext(&li))) {
+                redisClient *slave = listNodeValue(ln);
+                char *state = NULL;
+                char ip[32];
+                int port;
+
+                if (anetPeerToString(slave->fd,ip,&port) == -1) continue;
+                switch(slave->replstate) {
+                case REDIS_REPL_WAIT_BGSAVE_START:
+                case REDIS_REPL_WAIT_BGSAVE_END:
+                    state = "wait_bgsave";
+                    break;
+                case REDIS_REPL_SEND_BULK:
+                    state = "send_bulk";
+                    break;
+                case REDIS_REPL_ONLINE:
+                    state = "online";
+                    break;
+                }
+                if (state == NULL) continue;
+                info = sdscatprintf(info,"slave%d:%s,%d,%s\r\n",
+                    slaveid,ip,port,state);
+                slaveid++;
+            }
+        }
     }
 
     /* CPU */
@@ -1856,8 +1893,16 @@ void version() {
 }
 
 void usage() {
-    fprintf(stderr,"Usage: ./redis-server [/path/to/redis.conf]\n");
+    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,"Examples:\n");
+    fprintf(stderr,"       ./redis-server (run the server with default conf)\n");
+    fprintf(stderr,"       ./redis-server /etc/redis/6379.conf\n");
+    fprintf(stderr,"       ./redis-server --port 7777\n");
+    fprintf(stderr,"       ./redis-server --port 7777 --slaveof 127.0.0.1 8888\n");
+    fprintf(stderr,"       ./redis-server /etc/myredis.conf --loglevel verbose\n");
     exit(1);
 }