From: laiwei <laiwei.ustc@gmail.com>
Date: Fri, 24 Oct 2014 07:45:17 +0000 (+0800)
Subject: add PING-PONG doc
X-Git-Tag: v1.5.0-rc1~18^2^2~1
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=1d0074586d249b7a612e944d35fd70b169127a2d;p=thirdparty%2Frrdtool-1.x.git

add PING-PONG doc
---

diff --git a/doc/rrdcached.pod b/doc/rrdcached.pod
index 2999eb40..1c29c401 100644
--- a/doc/rrdcached.pod
+++ b/doc/rrdcached.pod
@@ -646,6 +646,13 @@ Example:
  JournalBytes: 190
  JournalRotate: 0
 
+=item B<PING>
+
+PING-PONG, this is very usefull when using connection pool between user client and RRDCACHED.
+
+Example:
+ 0 PONG
+
 =item B<UPDATE> I<filename> I<values> [I<values> ...]
 
 Adds more data to a filename. This is B<the> operation the daemon was designed