The method of memcache installation configuration under Linux

Installation Configuration Method One

Personal Understanding:

1. It is based on the C language Libevent library for the development of
2.Memcache is a c/s software, this software is the maintenance of memory.
3. The data is used in memory and is faster to read from memory than from the hard disk.
4. Reading memory reduces calls to I/O devices, increasing the speed of access.
5. Memory is a high-speed temporary storage of information hardware, power loss after the information will be cleared.
6. Hard disk is a low speed long-term storage of information hardware, power loss after the information will be retained.

Linux memcache server-side installation

Memcache used libevent This library for socket processing, so need to install libevent (if your system has been installed Libevent, you can not install)

1. Install Libevent first. This thing needs to be configured to specify an installation path, i.e../configure–prefix=/usr; then make; then make install;
2. Reinstall the memcached, just need to specify the Libevent installation path in the configuration, that is./configure–with-libevent=/usr; then make; then make instal;

This completes the Linux Memcache server-side installation. The detailed approach is as follows:

2. Install Libevent First:

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# tar ZXVF libevent-1.2.tar.gz # CD libevent-1.2 #./CONFIGURE–PREFIX=/USR # make # make Install

3. Test whether the Libevent is installed successfully:

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# Ls-al/usr/lib | grep libevent lrwxrwxrwx 1 root 17:38 libevent-1.2.so.1-> libevent-1.2.so.1.0.3 -rwxr-xr-x 1 root 263546 17:38 libevent-1.2.so.1.0.3 -rw-r–r–1 root root 454156 17:38 libevent.a -rwxr-xr-x 1 root 811 17:38 libevent.la lrwxrwxrwx 1 root 17:38 libevent.so-> libevent-1.2.so.1.0.3

It's all right, it's all set up.

4. Install memcached, also need to install the designated Libevent installation location:

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# cd/tmp # tar ZXVF memcached-1.2.0.tar.gz # CD memcached-1.2.0 #./CONFIGURE–WITH-LIBEVENT=/USR # make # make Install

If there is an error in the middle, please check the errors carefully, and configure or add the corresponding libraries or paths according to the error message.
When the installation is complete, the memcached will be placed in the/usr/local/bin/memcached,

5. Test for successful installation of memcached:

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# ls-al/usr/local/bin/mem* -rwxr-xr-x 1 root 137986 17:39/usr/local/bin/memcached -rwxr-xr-x 1 root 140179 17:39/usr/local/bin/memcached-debug

Installing Memcache PHP Extensions

1. Select the Memcache version that you want to download in Http://pecl.php.net/package/memcache.

2. Install the PHP memcache extension

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tar vxzf Memcache-2.2.1.tgz CD memcache-2.2.1 /usr/local/php/bin/phpize ./configure–enable-memcache– With-php-config=/usr/local/php/bin/php-config–with-zlib-dir Make make install

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3. The above installation will have a similar hint: Installing Shared extensions:/usr/local/php/lib/php/extensions/no-debug-non-zts-2007xxxx/ 4. Change the Extension_dir = "./" in php.ini to Extension_dir = "/usr/local/php/lib/php/extensions/no-debug-non-zts-2007xxxx/" 5. Add a row to load the memcache extension: extension=memcache.so

Basic Settings for memcached:
1. Start the Memcache server side:
#/usr/local/bin/memcached-d-M 10-u root-l 192.168.0.200-p 12000-c 256-p/tmp/memcached.pid

The-D option is to start a daemon,
-M is the amount of memory allocated to Memcache, in megabytes, I am 10MB here,
-U is the user running memcache, I am here root,
-L is a listening server IP address, if there are more than one address, I specify the IP address of the server 192.168.0.200,
-P is the port that sets the memcache listening, I set 12000 here, preferably 1024 or more ports,
The-c option is the maximum number of concurrent connections to run, the default is 1024, I set 256 here, according to the load of your server to set,
-P is set to save the Memcache pid file, which I am here to save in/tmp/memcached.pid,
2. If you want to end the memcache process, execute:

# Kill ' Cat/tmp/memcached.pid '
You can also start multiple daemons, but the ports cannot be duplicated.

Note: If you report memcached:error while loading shared libraries:libevent-2.0.so.5:cannot O error when starting Memcache

If the "memcached:error while loading shared Libraries:libevent-2.0.so.5:cannot" occurs at startup
Open Shared object File:no such file or directory, which means that memcached cannot find
Libevent's Location
So, first use the Whereis libevent to get the location, and then connect to the path that memcached is looking for
First Look, where's libevent?
# Whereis Libevent
Libevent:/USR/LOCAL/LIB/LIBEVENT.LA/USR/LOCAL/LIB/LIBEVENT.SO/USR/LOCAL/LIB/LIBEVENT.A
And then, look where memcached is looking for it.
# ld_debug=libs memcached-v 2>&1 >/dev/null | Less
Can see: Is/usr/lib/libevent-2.0.so.5, so, to create a soft chain
[Root@localhost tools]# ln-s/usr/local/lib/libevent-2.0.so.5/usr/lib/libevent-2.0.so.5
Start Www.111cn.net again
Close memcached:p kill memcached
Check if the memcached is running properly
#ps aux | grep memcached
#telnet localhost 11211
....
Stats
...
will display the basic information of the memcached

Installation Configuration Method Two

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wget http://memcached.googlecode.com/files/memcached-1.4.10.tar.gz TAR-ZXVF memcached-1.4.10.tar.gz CD memcached-1.x.x

./configure #到这一步报错了如下:
#configure: Error:libevent is required. You can get it from http://www.monkey.org/~provos/libevent/
Memcache used libevent This library for socket processing, so also need to install the latest version of Libevent,libevent is libevent-2.0. (If your system has libevent installed, you may not need to install it)
Official website: http://www.monkey.org/~provos/libevent/

It's just libevent.

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wget http://cloud.github.com/downloads/libevent/libevent/libevent-2.0.16-stable.tar.gz Tar zxvf libevent-2.0.10-stable.tar.gz ./configure-prefix=/usr Make &&make Install Test whether the Libevent is installed successfully Ls-al/usr/lib | grep libevent

Come out a big list of things, said the names installed

Next Install Memcache

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./configure–with-libevent=/usr Test whether the memcached was successfully installed ls-al/usr/local/bin/mem* -rwxr-xr-x 1 root root 203321 01-05 08:03/usr/local/bin/memcached Description of Successful Installation

Basic Settings for memcached:
1. Start the Memcache server side:
#/usr/local/bin/memcached-d-M 10-u root-l 192.168.0.200-p 12000-c 256-p/tmp/memcached.pid

The-D option is to start a daemon,
-M is the amount of memory allocated to Memcache, in megabytes, I am 10MB here,
-U is the user running memcache, I am here root,
-L is a listening server IP address, if there are more than one address, I specify the IP address of the server 192.168.0.200,
-P is the port that sets the memcache listening, I set 12000 here, preferably 1024 or more ports,
The-c option is the maximum number of concurrent connections to run, the default is 1024, I set 256 here, according to the load of your server to set,
-P is set to save the Memcache pid file, which I am here to save in/tmp/memcached.pid,

2. If you want to end the memcache process, execute:

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# Kill ' Cat/tmp/memcached.pid '

You can also start multiple daemons, but the ports cannot be duplicated.

3. Restart Apache,service httpd restart or nginx

Installing Memcache PHP Extensions
1. Select the Memcache version that you want to download in Http://pecl.php.net/package/memcache.
2. Install the PHP memcache extension

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wget http://pecl.php.net/get/memcache-2.2.6.tgz Tar vxzf memcache-2.2.6.tgz CD memcache-2.2.6.tgz /usr/local/php/bin/phpize ./configure–enable-memcache–with-php-config=/usr/local/php/bin/php-config–with-zlib-dir Make Make install

3. The above installation will have a similar hint:

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Installing Shared extensions:/usr/local/php/lib/php/extensions/no-debug-non-zts-2007xxxx/

4. Change the Extension_dir = "./" in php.ini to

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Extension_dir = "/usr/local/php/lib/php/extensions/no-debug-non-zts-2007xxxx/"

5. Add a row to load the memcache extension: extension=memcache.so

Memcache Environment test:
Run the following PHP file, if the output is a test!, it means that the environment has been built successfully. Start to appreciate the charm of memcache!

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<? PHP $ MEM = new Memcache; $mem->connect ("127.0.0.1″, 11211)"; $mem->set (' key ', ' This is a test! ', 0, 60); $val = $mem->get (' key '); Echo $val; ?