Upgrade Sybase ASE to Sybase ASE Cluster Edition – Step by Step

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Install the Sybase ASE Cluster Edition Software

Shared Installation

With the new Sybase ASE 15.5 version, you have to option to install the software either as shared installation or private installation. If you use the shared installation, you need to have access to a shared filesystem that is accessible from every node in the cluster. Although the shared installation is more convenient, it presents other risks like a single point of failure if the shared filesystem goes offline.

Private Installation

The private installation provides a dependency separation between nodes for added stability and protection. The private installation installs the Sybase software on each node, and does not require a shared filesystem. You need to maintain a strict file structure and placement discipline, because every node must access the software identically.

Pre-Upgrade Steps

Once you completed the prerequisites, you need to shift your focus to preparing the databases, and the database server.

  1. If you are upgrading Adaptive Server, the previously installed version of the server must be running. If you are upgrading Backup Server, Historical Server, Monitor Server, or XP Server, those servers must not be running.
  2. Stored procedure text in the syscomments table is required for the upgrade. If you deleted the text, you must add it back again.Note: As a best practice: if you don’t want to display the text, hide it by using the sp_hide_text stored procedure instead of deleting it.
  3. Resolve reserved words using quoted identifiers. This is a simple check by installing the upgrade package and then executing sp_checkreswords.Caution: This step is simple enough, but if omitted, can lead to serious issues during the upgrade process.

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