From 89d544d6f263561160352db14afe8c70cdb7e707 Mon Sep 17 00:00:00 2001
From: Wang Yuan <wangyuan21@baidu.com>
Date: Wed, 19 Aug 2020 15:52:53 +0800
Subject: [PATCH] Add comments on 'slave.repldboff' when use diskless
 replication (#7679)

---
 src/replication.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/replication.c b/src/replication.c
index 1e1be345c..d629a197f 100644
--- a/src/replication.c
+++ b/src/replication.c
@@ -1186,6 +1186,8 @@ void rdbPipeReadHandler(struct aeEventLoop *eventLoop, int fd, void *clientData,
                 /* An error and still in connected state, is equivalent to EAGAIN */
                 slave->repldboff = 0;
             } else {
+                /* Note: when use diskless replication, 'repldboff' is the offset
+                 * of 'rdb_pipe_buff' sent rather than the offset of entire RDB. */
                 slave->repldboff = nwritten;
                 server.stat_net_output_bytes += nwritten;
             }