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Session Clustering

The Zend Server Cluster Manager, Session Clustering page is accessed from Cluster Setup | Session Clustering.

From this page you can define, the different settings for the Session Clustering component.

This component is used to provide a highly scalable solution for synchronizing session data across a cluster of PHP servers.

High-availability session clustering allows effective traffic balancing across your entire cluster, eliminating session loss in case of node failure and providing maximum uptime for your application.

From the Session Clustering page you can define the following settings:

Zend Session Clustering Settings:

Session Lifetime - the duration for the session’s time-out limit.

Zend Session Network Settings:

IP's allowed to communicate with the SCD (Session Clustering Daemon) - Zend Session Clustering settings provides a way to grant communication to the Session Clustering Daemon by server (for multiple servers you can use a Net Mask which implements Wildcards on IP addresses).

Notes:

*If your server is behind a firewall, ensure your broadcast ports are open so that your servers can broadcast to each other. The port that should be opened is defined in the mod_cluster.network.tcp_port_remote directive in your 'scd.ini' file. The default port number is 10060.

*All servers in the cluster should be in the same subnet / broadcast domain.

Net Masks:

Net Masks are used to define a string of IP addresses using Wildcards '*' to specify the range of IPs that are either allowed or denied hosts. This option, allows to specify a range of IPs from 0-255 according to the selected amount of Wildcards for example if you choose to use the Net Mask option to grant communication to the following IPs: 24 (10.1.3. *) all IP addresses beginning with 10.1.3 will be granted access to the SC Daemon on this server.