Detailed description of how to configure Memcache in Drupal7

Memcache configuration is not much said. Because drupal has many modules and frequent database calls, memcache is a required configuration in the drupal site. This article describes the configuration of memcache in Drupal7, for your convenience.

1. Install the memcache service and start memcached.

2. Install the drupal memcache module. Http://drupal.org/project/memcache)

3. Configure settings. php

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$ Conf ['cache _ backends '] [] = 'sites/all/modules/memcache. inc '; // The 'cache _ form' bin must be assigned no non-volatile storage. $ Conf ['cache _ class_cache_form '] = 'drupaldatabasecache '; $ Conf ['cache _ default_class '] = 'memcachedrupal '; $ Conf ['memcache _ key_prefix'] = 'something _ unique ';

Note that memcache is required. the file path of inc is correctly written. As mentioned in the Drupal module directory organization summary, we generally place the memcache module under the contrib folder, therefore, the path may be sites/all/modules/contrib/memcache. inc.
In addition, it is best to set memcache_key_prefix.

4. Multiple memcachd services.
By default, if memcache_servers and memcache_bins are not configured, Drupal considers that there is only one server, that is, 127.0.0.1: 11211. If there are multiple memcache instances, add the following configuration.

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$ Conf ['memcache _ servers'] = array ( '10. 1.1.1: 11211 '=> 'default ', '10. 1.1.1: 11212 '=> 'default ', '10. 1.1.2: 11211 '=> 'default ', '10. 1.1.3: 11211 '=> 'cluster2 ', '10. 1.1.4: 11211 '=> 'cluster2' ); $ Conf ['memcache _ bins'] = array ( 'Cache' => 'default ', 'Cache _ filter' => 'cluster2 ', 'Cache _ menu '=> 'cluster2' );

Everything is ready.

Finally, I will explain how to configure multiple memcache instances on a single machine, that is, to build a memcache cluster on a single machine.
We need to modify two files, one is the startup script/etc/init. d/memcached-multi, and the other is the configuration file/etc/sysconfig/memcached.

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/Etc/sysconfig/memcached

Is used to configure the size of multiple memcache instances

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PORT = "11211" USER = "memcached" MAXCONN = "1024" CACHESIZE = "512" OPTIONS = "" MULTIBUCKET = "2" CACHESIZEARRAY [1] = "1024" CACHESIZEARRAY [2] = "128"/etc/init. d/memcached-multi

Is used to start the memcache cluster. (Start, stop, restart)

The code is as follows:

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#! /Bin/sh # # Chkconfig:-55 45 # Description: The memcached daemon is a network memory cache service. # Processname: memcached # Config:/etc/sysconfig/memcached # Pidfile:/var/run/memcached. pid   # Standard LSB functions #./Lib/lsb/init-functions   # Source function library. ./Etc/init. d/functions   PORT = 11211 USER = memcached MAXCONN = 1024 CACHESIZE = 64 OPTIONS = "" MULTIBUCKET = ""   If [-f/etc/sysconfig/memcached]; then ./Etc/sysconfig/memcached Fi   [-Z "$ MULTIBUCKET"] & amp; MULTIBUCKET = 1   # Check that networking is up. ./Etc/sysconfig/network   If ["$ NETWORKING" = "no"] Then Exit 0 Fi   RETVAL = 0 Prog = "memcached"   Start (){ Echo-n $ "Starting $ prog :" # Insure that/var/run/memcached has proper permissions If ["'stat-c % U/var/run/memcached '"! = "$ USER"]; then Chown $ USER/var/run/memcached Fi   For I in '/usr/bin/seq 1 $ multibucket'; do THISCACHESIZE = $ CACHESIZE [$ {# CACHESIZEARRAY [*]}-gt 0-a $ {CACHESIZEARRAY [$ I]: -0}-gt 0] & THISCACHESIZE =$ {CACHESIZEARRAY [$ I]} Daemon -- pidfile/var/run/memcached. pid memcached-d-p $ PORT-u $ USER-m $ THISCACHESIZE-c $ MAXCONN-P/var/run/memcached-$ I. pid $ OPTIONS Let RETVAL = $ RETVAL + $? Let PORT = $ PORT + 1 Done Echo [$ RETVAL-eq 0] & touch/var/lock/subsys/memcached } Stop (){ Echo-n $ "Stopping $ prog :" For I in '/usr/bin/seq 1 $ multibucket'; do Killproc-p/var/run/memcached-$ I. pid/usr/bin/memcached Let RETVAL = $ RETVAL + $? Done Echo If [$ RETVAL-eq 0]; then Rm-f/var/lock/subsys/memcached Rm-f/var/run/memcached. pid Fi }   Restart (){ Stop Start }   # See how we were called. Case "$1" in Start) Start ;; Stop) Stop ;; Status) Echo "Warning: This status check is laughable. Inspect netstat or ps output manually ." Status memcached ;; Restart | reload | force-reload) Restart ;; Condrestart) [-F/var/lock/subsys/memcached] & restart |: ;; *) Echo $ "Usage: $0 {start | stop | status | restart | reload | force-reload | condrestart }" Exit 1 Esac   Exit $ RETVAL

So far, some are ready.