test

Sun Cluster 2.2 Software Installation Guide

Selecting an Install Location for Sun Cluster HA for Sybase

You can install the Sybase binaries either on a physical host's local disks or on the shared multihost disks (logical host). Use Table 6-1, which shows the advantages and disadvantages of each install location, to determine the install location that best fits your needs.

Table 6-1 Sybase Install Locations Comparison

Install Location 

Advantages 

Disadvantages 

Multihost Disks 

Eases administration - only one copy must be maintained 

  • Sacrifices redundancy

  • In some cases, compromises availability

  • In cases of switchover or accidental removal of Sybase binaries, the server will be unavailable

  • Requires a mirror, so disk space must be doubled

Local Disks 

Increases redundancy - each node is a copy 

  • Increases administrative overhead - multiple copies must be maintained

If you install the Sybase server on the multihost disk, you must install the Sybase clients in /var/opt/sybase on all nodes. If you install the Sybase servers on local disks, you are not required to install Sybase clients.