Session Clustering Settings

The Session Clustering Settings tab is accessed from Session Clustering | Settings and selecting a node or group from the selection tree.

The SC (Session Clustering) settings tab enables to define individual SC settings per server (node) or Group.

Note:

The settings defined for a specific node/group can be later applied to additional nodes/groups by using the Clone Settings option from the Settings tab. (Additional information about cloning settings can be found in Clone Wizard).

The active buttons on the SC Settings tab are:

Stop - Shuts down the SC Daemon.
Start/Restart - Restarts the SC Daemon.
Save - Applies and saves the settings.
Clone Settings - Applies settings to another server or group.

Note:

Windows all supported versions should use the service manager to Start and Stop services (Start/Stop options in the Tab will not be available).

SC settings are separated by category and provide configuration options as follows:

General Settings

General settings determine the basic session's behavior and output.

Mod Cluster Verbosity Level - Set the verbosity of the Mod Cluster’s output to the log
Daemon Verbosity Level - Set the verbosity of the Daemon’s output to the log
Sessions Lifetime - Define the session’s time-out limit
Garbage Collection Frequency - Define garbage collection intervals, for deleting unused sessions (Unused sessions are sessions, that the last time they were used, is larger than the interval)
Session Clustering Daemon Threads - Determine how many Daemon threads can be active at once.

SC General Settings

Storage Settings

The initial storage settings were defined in the installation process, where the user could choose one of the two available storage methods. However, this setting can be easily changed at any time by selecting a different storage method from the Session Clustering Settings tab.

Note:

Additional information on storage methods can be found in "Session Clustering Storage models".

SC Storage Settings

Network Settings

Zend SC settings provides a way to grant communication to the SC Daemon by server (for multiple servers you can use a Net Mask which implements Wildcards on IP addresses).

To change or add a host:

Go to Session Clustering | Settings.
Click "Add".
The Add New Allowed Host dialog box opens.
Enter the Settings for the new Allowed Host.
Click "Apply".
A new Host will appear in the Server Hosts category on the Network Settings screen.
To edit or remove a Host, click "Edit" or "Remove" (To the right of the Server Host you wish to edit).
You will be prompted to confirm your new settings.
Click "Save" to save the settings to the database.

SC Network Settings

Note:

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 zend.ini file. The default port number is 34567.

Net Masks:

The Net Mask option is 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.

Note:

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

Related Links:
Session Clustering Statistics

The Importance of Session IDs