What SunPlex data services are available?
The list of supported data services is included in “Supported Products” in Sun Cluster 3.1 9/04 Release Notes for Solaris OS .
What application versions are supported by SunPlex data services?
The list of supported application versions is included in “Supported Products” in Sun Cluster 3.1 9/04 Release Notes for Solaris OS.
Can I write my own data service?
Yes. See the “Data Service Development Library Reference” in Sun Cluster Data Services Developer's Guide for Solaris OS for more information.
When creating network resources, should I specify numeric IP addresses or hostnames?
The preferred method for specifying network resources is to use the UNIX hostname rather than the numeric IP address.
When creating network resources, what is the difference between using a logical hostname (a LogicalHostname resource) or a shared address (a SharedAddress resource)?
Except in the case of Sun Cluster HA for NFS, wherever the documentation calls for the use of a LogicalHostname resource in a Failover mode resource group, a SharedAddress resource or LogicalHostname resource may be used interchangeably. The use of a SharedAddress resource incurs some additional overhead because the cluster networking software is configured for a SharedAddress but not for a LogicalHostname.
The advantage to using a SharedAddress is the case where you are configuring both scalable and failover data services, and want clients to be able to access both services using the same hostname. In this case, the SharedAddress resource(s) along with the failover application resource are contained in one resource group, while the scalable service resource is contained in a separate resource group and configured to use the SharedAddress. Both the scalable and failover services may then use the same set of hostnames/addresses which are configured in the SharedAddress resource.