Detailed description of how to configure Memcache in Drupal7

Source: Internet
Author: User
Tags memcached drupal

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

The code is as follows: Copy code
$ 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.

The code is as follows: Copy code
$ 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.

The code is as follows: Copy code
/Etc/sysconfig/memcached

Is used to configure the size of multiple memcache instances

The code is as follows: Copy code
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: Copy code
#! /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.

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