PSYNC: debugging printf() calls are now logs at DEBUG level.

src/replication.c

@@ -333,27 +333,32 @@ void replicationFeedMonitors(redisClient *c, list *monitors, int dictid, robj **
 long long addReplyReplicationBacklog(redisClient *c, long long offset) {
     long long j, skip, len;
 
-//    printf("SLAVE REQUEST %lld\n", offset);
+    redisLog(REDIS_DEBUG, "[PSYNC] Slave request offset: %lld", offset);
 
     if (server.repl_backlog_histlen == 0) {
-//        printf("NO HISTORY\n");
+        redisLog(REDIS_DEBUG, "[PSYNC] Backlog history len is zero");
         return 0;
     }
 
-//    printf("FIRST BYTE WE HAVE %lld\n", server.repl_backlog_off);
-//    printf("HISTLEN %lld\n", server.repl_backlog_histlen);
-//    printf("IDX %lld\n", server.repl_backlog_idx);
+    redisLog(REDIS_DEBUG, "[PSYNC] Backlog size: %lld",
+             server.repl_backlog_size);
+    redisLog(REDIS_DEBUG, "[PSYNC] First byte: %lld",
+             server.repl_backlog_off);
+    redisLog(REDIS_DEBUG, "[PSYNC] History len: %lld",
+             server.repl_backlog_histlen);
+    redisLog(REDIS_DEBUG, "[PSYNC] Current index: %lld",
+             server.repl_backlog_idx);
 
     /* Compute the amount of bytes we need to discard. */
     skip = offset - server.repl_backlog_off;
-//    printf("SKIP %lld\n", skip);
+    redisLog(REDIS_DEBUG, "[PSYNC] Skipping: %lld", skip);
 
     /* Point j to the oldest byte, that is actaully our
      * server.repl_backlog_off byte. */
     j = (server.repl_backlog_idx +
         (server.repl_backlog_size-server.repl_backlog_histlen)) %
         server.repl_backlog_size;
-//    printf("J %lld\n", j);
+    redisLog(REDIS_DEBUG, "[PSYNC] Index of first byte: %lld", j);
 
     /* Discard the amount of data to seek to the specified 'offset'. */
     j = (j + skip) % server.repl_backlog_size;
@@ -361,13 +366,13 @@ long long addReplyReplicationBacklog(redisClient *c, long long offset) {
     /* Feed slave with data. Since it is a circular buffer we have to
      * split the reply in two parts if we are cross-boundary. */
     len = server.repl_backlog_histlen - skip;
-//    printf("LEN %lld\n", len);
+    redisLog(REDIS_DEBUG, "[PSYNC] Reply total length: %lld", len);
     while(len) {
         long long thislen =
             ((server.repl_backlog_size - j) < len) ?
             (server.repl_backlog_size - j) : len;
 
-//        printf("WRITE %lld\n", thislen);
+        redisLog(REDIS_DEBUG, "[PSYNC] addReply() length: %lld", thislen);
         addReplySds(c,sdsnewlen(server.repl_backlog + j, thislen));
         len -= thislen;
         j = 0;