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112Veritas Cluster Server: Configuring Oracle VM Server for SPARC for high availabilityAbout Veritas Cluster Server in a Oracle VM Server for SPARC environmentVeritas Cluster Server known issuesThe following section describes known issues with VCS in a Oracle VM Server forSPARC environment.Shutting down the control domain may cause the guest domainto crash (1631762)Set upSymptomAnalysisTwo Oracle SPARC Enterprise T5240 serverphysical boxes, each with a control domainand a guest domain. The guest domains ineach of the physical boxes form a two nodecluster. The nodes are named node 0 andnode 1 in the following text.Gracefully shutting down the control domainof node 0 causes the guest domain of node 0to crash.Even though the guest domain can continueto function when the control domain is shutdown, the heartbeats between node 0 andnode 1 are lost as the control domain shutsdown. As a result, the cluster forms twoseparate sub-clusters without thesub-clusters being able to see each others'heartbeats.I/O fencing resolves the split brain situationand determines that only one sub-clusterwill continue to function while the othersub-cluster should panic. Therefore, thepanic of node 0 is expected behavior.Resolution:None; this is expected behavior. However,Symantec recommends keeping the controldomain highly available for the properfunction of the SFCFS and SFRAC stack inthe guest domains.If you have set up a virtual private LLTheartbeats between the two guests (node 0and node1), the guest will not crash.
Veritas Cluster Server: Configuring Oracle VM Server for SPARC for high availabilityAbout Veritas Storage Foundation Cluster File System in an Oracle VM Server for SPARC environment113About Veritas Storage Foundation Cluster File Systemin an Oracle VM Server for SPARC environmentVeritas Storage Foundation Cluster File System (SFCFS) allows clustered serversto mount and use a file system simultaneously as if all applications using the filesystem were running on the same server for a Oracle VM Server for SPARC.Veritas Storage Foundation Cluster File System limitationsDepending on the configuration model, the following limitations apply to usingSFCFS in an Oracle VM Server for SPARC environment.Limitations for SFCFS configuration in the guest domain:■■There is no support for replicating a shared disk group using VVR, when oneor more guest domains share the disk group.If you want to configure I/O fencing in guest domain, then do not exportphysical devices to more than one guest domain on the same physical node.Otherwise, I/O fencing fences off the device whenever one of the guest domaindies. This situation causes the other guest domains also to lose access to thedevice.Symantec recommends you to disable I/O fencing if you exported the same physicaldevice to multiple guest domains.About Veritas Cluster Server configuration models inan Oracle VM Server for SPARC environmentWhen you configure VCS in an Oracle VM Server for SPARC environment, youneed some specific information about the logical domain, network, and the storagedevices that the logical domain requires to run.You need to know the following information about your logical domain:■■■■The logical domain’s nameThe names of the primary network interfaces for each nodeThe virtual switch that the logical domain usesThe name and type of storage that the logical domain usesVCS configuration depends on whether you want VCS to fail over the logicaldomain or the application on a failure:■Veritas Cluster Server setup to fail over a logical domain on a failure
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