memcached數據dump

實際應用中，有時候需要將memcached中所有的數據dump出來，memcached本身只提供了stats cachedump $slabId $limit接口，但不能一次將所有的key dump出來，藉助libmemcached的memdump工具，可以將所有的key一次性dump出來。

首先，查看一下memdump的幫助信息：

[root@localhost bin]# ./memdump -h
memdump v1.0

        Dump all values from one or many servers.

Current options. A '=' means the option takes a value.

         --version
                Display the version of the application and then exit.
         --help
                Display this message and then exit.
         --quiet
                stderr and stdin will be closed at application startup.
         --verbose
                Give more details on the progression of the application.
         --debug
                Provide output only useful for debugging.
         --servers=
                List which servers you wish to connect to.
         --hash=
                Select hash type.
         --binary
                Switch to binary protocol.
         --username=
                Username to use for SASL authentication
         --password=
                Password to use for SASL authentication

 

[root@localhost bin]# ./memdump --servers=127.0.0.1:11211

[root@localhost bin]# ./memdump --servers=127.0.0.1:11211,127.0.0.1:11212

已知的問題：

在我的虛擬機CentOS 5.5上，裝的libmemcached-1.0.2，其中memdump是v1.0版，會報以下錯誤：

Failed to dump keys: SERVER HAS FAILED AND IS DISABLED UNTIL TIMED RETRY, host: 127.0.0.1:11211 -> libmemcached/connect.cc:592

在公司的開發機上測試是無問題的。

相關鏈接：

libmemcached：http://libmemcached.org/