Memcached安装

Memcached安装

[root@eegooserver3 ~]# yum install libevent memcached libmemcached

libevent-1.4.13-4.el6.x86_64.rpm

libmemcached-0.31-1.1.el6.x86_64.rpm

memcached-1.4.4-3.el6.x86_64.rpm

[root@eegooserver3 ~]# memcached –h

[root@eegooserver3 ~]# chkconfig memcached on

[root@eegooserver3 ~]# chkconfig --list

[root@eegooserver3 ~]# service memcached start

等同于(memcached -d -p 11211 -u memcached -m 1024 -c 1024 -P /var/run/memcached/memcached.pid)

[root@eegooserver3 ~]# memcached -h

memcached 1.4.4

-p <num>      TCP port number to listen on (default: 11211)

-U <num>      UDP port number to listen on (default: 11211, 0 is off)

-s <file>     UNIX socket path to listen on (disables network support)

-a <mask>     access mask for UNIX socket, in octal (default: 0700)

-l <ip_addr>  interface to listen on (default: INADDR_ANY, all addresses)

-d            run as a daemon

-r            maximize core file limit

-u <username> assume identity of <username> (only when run as root)

-m <num>      max memory to use for items in megabytes (default: 64 MB)

-M            return error on memory exhausted (rather than removing items)

-c <num>      max simultaneous connections (default: 1024)

-k            lock down all paged memory.  Note that there is a

              limit on how much memory you may lock.  Trying to

              allocate more than that would fail, so be sure you

              set the limit correctly for the user you started

              the daemon with (not for -u <username> user;

              under sh this is done with 'ulimit -S -l NUM_KB').

-v            verbose (print errors/warnings while in event loop)

-vv           very verbose (also print client commands/reponses)

-vvv          extremely verbose (also print internal state transitions)

-h            print this help and exit

-i            print memcached and libevent license

-P <file>     save PID in <file>, only used with -d option

-f <factor>   chunk size growth factor (default: 1.25)

-n <bytes>    minimum space allocated for key+value+flags (default: 48)

-L            Try to use large memory pages (if available). Increasing

              the memory page size could reduce the number of TLB misses

              and improve the performance. In order to get large pages

              from the OS, memcached will allocate the total item-cache

              in one large chunk.

-D <char>     Use <char> as the delimiter between key prefixes and IDs.

              This is used for per-prefix stats reporting. The default is

              ":" (colon). If this option is specified, stats collection

              is turned on automatically; if not, then it may be turned on

              by sending the "stats detail on" command to the server.

-t <num>      number of threads to use (default: 4)

-R            Maximum number of requests per event, limits the number of

              requests process for a given connection to prevent

              starvation (default: 20)

-C            Disable use of CAS

-b            Set the backlog queue limit (default: 1024)

-B            Binding protocol - one of ascii, binary, or auto (default)

-I            Override the size of each slab page. Adjusts max item size

              (default: 1mb, min: 1k, max: 128m)

[root@eegooserver3 ~]

开放Memcached端口

/etc/sysconfig/iptables  加上下面一行

-A INPUT -m state --state NEW -m tcp -p tcp --dport 11211 -j ACCEPT

[root@eegooserver3 ~]# service iptables reload

[root@eegooserver3 ~]# service iptables restart

开放Memcached状态信息

[root@eegooserver3 ~]# memcached-tool localhost:11211

[root@eegooserver3 ~]# memcached-tool

Usage: memcached-tool <host[:port]> [mode]

       memcached-tool 10.0.0.5:11211 display    # shows slabs

       memcached-tool 10.0.0.5:11211            # same.  (default is display)

       memcached-tool 10.0.0.5:11211 stats      # shows general stats

       memcached-tool 10.0.0.5:11211 dump       # dumps keys and values

[root@eegooserver3 ~]#

自定义memcached开机启动

[root@eegooserver3 ~]# cp /opt/memcached.sh /etc/rc.d/init.d/memcachedeegoo

[root@eegooserver3 ~]# chmod 755 /etc/rc.d/init.d/memcachedeegoo

[root@eegooserver3 ~]# chkconfig --add memcachedeegoo

[root@eegooserver3 ~]# chkconfig --list

[root@eegooserver3 ~]# chkconfig memcachedeegoo on

[root@eegooserver3 ~]# chkconfig --list

[root@eegooserver3 ~]# service memcachedeegoo start

[root@eegooserver3 ~]# service memcachedeegoo restart

[root@eegooserver3 ~]# service memcachedeegoo stop