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Distributed Session Manager: Manage sessions using distributed MySQL servers

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Name: Robin <contact>
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Country: The Netherlands The Netherlands
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This class can be used as a replacement to the default PHP session manager class to store and retrieve sessions in distributed MySQL servers.

The class retrieves a list of MySQL server hosts from a configuration file in the INI format.

A random host is picked from the list to connect when it is necessary execute MySQL queries to store, retrieve, update or delete session data.

The MySQL server host connection timeout is set to a configurable value, so the class can skip a busy server and try connecting the next host in the list.

The session data may be stored on multiple servers at once to provide greater redundancy.

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Name: Distributed Session Manager
Base name: phpdsm
Description: Manage sessions using distributed MySQL servers
Version: -
PHP version: -
License: GNU General Public License (GPL)
All time users: 1637 users
All time rank: 2207
Week users: 0 users
Week rank: 1479 Equal
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Group folder image Databases Database management, accessing and searching View top rated classes
Group folder image User Management User records, authentication and session handling View top rated classes

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File Role Description
Accessible without login Image file sessions.png Screen Illustration

  Innovation Award  
PHP Programming Innovation award nominee
August 2006
Number 7

Prize: One subscription to the PHP Magazine
By default, user access session data is stored in files. However, in a clustered server environment, file storage is not very convenient.

Even when files are available to all cluster servers via a networked file system, it may cause data corruption if the session files are not locked from concurrent accesses. Networked file system locks may cause excessive delays.

This class provides an alternative solution by distributing session data storage using a MySQL database. It avoids some of the inconveniences of the concurrent accesses to session data stored in a networked file system.

Manuel Lemos

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Plain text file sessionmanager.php Class The Session Manager class
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