Data Service Timeout-Period Guideline

The following guideline addresses the problem reported in Bug 4499573. It was determined that the related functionality works as expected. As such, the Sun Cluster 3.0 12/01 Data Services Installation and Configuration Guide needs to reflect the following guideline.

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.