Chapter 10: Active-Passive Configuration for Sun Cluster 3.0 and 3.1

Installing Adaptive Server

You can install Adaptive Server on a global file system or on the local file systems of all the primary and secondary nodes.

Installing on a global file system

If you install Adaptive Server on a global file system, the advantage is that you need only maintain one server installation. However, you must install the Adaptive Server on a global file system that is managed by the SUNW.HAStorage or SUNW.HAStoragePlus resource in the Adaptive Server resource group, so that the installation directory $SYBASE also moves to the secondary node in the case of fail over.

Do not install $SYBASE on a failover file system managed by a SUNW.HAStoragePlus resource.

Installing on local file system

If you install Adaptive Server on a local file system:

The installation directory $SYBASE must use the same directory path on all the primary and secondary nodes. If different nodes use the $SYBASE directory in different locations, create a directory with the same path on all the primary and secondary nodes that acts as a symbolic link to the respective actual $SYBASE release directory paths.

For example, if the directory on node1 is /usr/sybase1 and on node2 is /usr/sybase2, create a symbolic link /sybase on both the nodes to their respective $SYBASE release directories.

On node1, /sybase is a link to /usr/sybase1, and on node2 /sybase is a link to /usr/sybase2. Thus, the value of $SYBASE points to the same path on both primary and secondary nodes.
The contents of $SYBASE on all the primary and secondary nodes must be consistent:
- Contents of files such as RUNSERVER, interfaces, SYBASE.sh, server configuration file, <servername>.cfg, and so on, must be consistent.
- The contents of $SYBASE/$SYBASE-ASE/SC-3_0, especially the files in the etc and bin directories, must be consistent.
- You must apply upgrades and patches consistently.
Various log files are created on all the nodes whenever a node hosts the Adaptive Server resource group. For example, Callback_log, Monitor_log, Adaptive Server and auxiliary server error logs, and so on. You must maintain consistency of these and any related files whether they are in default directories or you have specified different directory paths for any files using the corresponding Adaptive Server resource properties.

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