Considerations

Use the information in this section to plan the installation and configuration of any data service. The information in this section encourages you to think about the impact your decisions have on the installation and configuration of any data service. For specific considerations for your data service, see the chapter in Sun Cluster 3.1 Data Service Planning and Administration Guide that applies to your specific data service.

• When using data services that are I/O intensive and that have a large number of disks configured in the cluster, the application may experience delays due to retries within the I/O subsystem during disk failures. An I/O subsystem may take several minutes to retry and recover from a disk failure. This delay can result in Sun Cluster failing over the application to another node, even though the disk may have eventually recovered on its own. To avoid failover during these instances, consider increasing the default probe timeout of the data service. If you need more information or help with increasing data service timeouts, contact your local support engineer.

• For better performance, Install and configure your data service on the cluster nodes with direct connection to the storage.