Synchronization session with Memcache in a Web cluster _php tutorial

It is good to use Memcache to synchronize sessions, of course, you can also save the session via Redis, which allows PHP to open and store the session in the Redis cache. The following is a procedure for setting up a session with Memcache in a Web cluster:

1. Simulating a Web cluster

I started two memcached processes, simulating two servers separately.

/usr/local/bin/memcached-d-M 20-u zhangy-p 12000-p./memcached.pid
/usr/local/bin/memcached-d-M 20-u zhangy-p 13000-p./mem.pid

2, modify the configuration of PHP

Vi/usr/local/php/lib/php.ini

Session.save_handler = "Memcache"
Memcache.hash_strategy = "consistent"
Session.save_path = "tcp://127.0.0.1:13000?weight=10,tcp://127.0.0.1:12000"

Note: The first line, the session storage method is memcache; the second line, Memcache hash algorithm is consistent; third row, session storage status;

3. Restart Apache

View Phpinfo

Session

Session Support	Enabled
Registered Save handlers	Files User SQLite Memcache
Registered serializer Handlers	PHP php_binary

Immediately following are:

Session.save_path

tcp://127.0.0.1:13000,tcp://127.0.0.1:12000

tcp://127.0.0.1:13000,tcp://127.0.0.1:12000

4, do a simple test as follows:

A), Prepare documents session.php

<?php session_start (); $_session[' username '] = "ABCABC"; Echo session_id ();?>

b), display session content file

<?php $mem = new Memcache; $mem->addserver ("127.0.0.1", 12000) or Die ("Could not add server 12000"); $mem->addserver ("127.0.0.1", 13000) or Die ("Could not add server 13000"); $val = $mem->get (' Qp0mrob2ovcqle3u4lbr4obsa5 '); Echo session_id (); The resulting session Idecho $val;?>

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