In this tab you can add, remove and modify the Cluster Service entries in the cluster.
To add a cluster service, click Add to open the Add Cluster Services dialog box.
In the IP address / name field enter the IP address (or DNS name) of the server on which the Cluster Service will run.
In the Description field enter a descriptive name to make it easier for you to remember the definition.
When you click on the OK button, HAM tries to communicate with the given server (using the IP address that you provided) instructing
it to register itself with the cluster. If the operation succeeds, you will see the added cluster in the Cluster Services
list of the Cluster Properties dialog box after the Add Cluster Services dialog box closes. If the operation fails, you need
to check that:
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The server software has been correctly installed on the target machine. |
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There is open communication between the target machine and the one running HAM (and not blocked by a firewall, for example).
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The Sentinel service on the cluster service machine is started. |
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The target machine does not already belong to your cluster or to another cluster (as a cluster service machine). |
From the Cluster Properties dialog box, in the Cluster service tab, you may also need to define the Port to be used by the
Cluster Services. By default, port 20000 will be configured. Cluster Services require this port to communicate between each
other.
Under Session weights, you can define the weight you want to give to each type of user session (display, printer and file
transfer). By default, the printer and file transfer sessions are configured with a weight of 3 while the display sessions
have a weight of 1. This means that every printer or file transfer session is equivalent to 3 display sessions. The cluster
services use these values to calculate the load that each server is handling in order to decide which one is least busy.
Notes
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You must define at least one cluster service to define in the cluster. |
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Once you have defined (or added) a machine as a cluster service in one cluster, this machine cannot be added to another cluster.
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If you want to change the role of the machine, you must first remove it from its original cluster. |
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The Modify button allows you to only change the description of the cluster service and not its address. |
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To change the address, remove the existing entry, then create a new one. |
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For changes to port number or session weights to take effect, you need to restart all cluster services. |
