Detailed explanation of how to configure Memcache in Drupal7

Detailed explanation of how to configure Memcache in Drupal7_PHP tutorial

WBOY

Release： 2016-07-13 16:57:47

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This article will give you a detailed introduction to the method of configuring Memcache in Drupal7. I hope this method will be helpful to you.

I won’t go into details about the configuration of Memcache. Drupal has many modules and frequent database calls, so memcache is a necessary configuration in the Drupal site. This article briefly lists the configuration of memcache in Drupal7 for your convenience.

1. Install memcache service and start memcached.

2. Install drupal’s memcache module. (http://drupal.org/project/memcache)

3. Configure settings.php

代码如下	复制代码
$conf['cache_backends'][] = 'sites/all/modules/memcache/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 the file path of memcache.inc needs to be written correctly. As mentioned in the summary of Drupal module directory organization, we generally place the memcache module under the contrib folder, so the path may be sites/all/modules/ contrib/memcache/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 will think that there is only one server, 127.0.0.1:11211. If there are multiple memcache instances, you need to add the following configuration.

The code is as follows

Copy code

$conf['memcache_servers'] = array(

代码如下	复制代码
$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' );

'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'

);

代码如下	复制代码
/etc/sysconfig/memcached

$conf['memcache_bins'] = array(

'cache' => 'default',

'cache_filter' => 'cluster2',

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

'cache_menu' => 'cluster2' );

Everything is ready. Finally, let’s explain how to configure multiple memcache instances on a single machine, that is, setting up a memcache cluster for 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. 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)

代码如下

复制代码

#! /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/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" ] && 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/memcached.pid memcached -d -p $PORT -u $USER -m $THISCACHESIZE -c $MAXCONN -P /var/run/memcached/memcached-$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 $MULTIBUCKET`; do
        killproc -p /var/run/memcached/memcached-$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 "" 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:

{start|stop|status|restart|reload|force-reload|condrestart}"
exit 1
esac

exit $RETVAL

Now everything is ready.