Veritas Storage Foundation™ and High Availability Solutions ...
Veritas Storage Foundation™ and High Availability Solutions ... Veritas Storage Foundation™ and High Availability Solutions ...
152Veritas Cluster Server: Configuring Oracle VM Server for SPARC for high availabilityConfiguring VCS to manage a Logical Domain using services from multiple I/O domainsFigure 6-18shows the dependency of LDom service group on the AlternateIOservice group.Configuration notes:■■■Configure the service group as a fail over type service group.The SystemList attribute in the LDom service group must contain only hostnames of the control domains from each physical system in the cluster.The LDom service group must have online local hard dependency with theAlternateIO service group.Sample configuration for LDom service groupThe LDom service group must have online local hard dependency with theAlternateIO service group.group ldmsg (SystemList = { primary1 = 0, primary2 = 1 }AutoStartList = { primary1, primary2 })LDom ldmres (LDomName = ldg1)
Veritas Cluster Server: Configuring Oracle VM Server for SPARC for high availabilityConfiguring VCS to manage a Logical Domain using services from multiple I/O domains153Failover scenariosScenarioControl domainAlternate I/O domainVCS behaviorState of eachstorage servicegroupOnlineOffline/FAULTOnlineOnlineNo fail overNo fail overOnlineOffline/FAULTNo fail overOffline/FAULTOffline/FAULTFail overState of eachnetwork servicegroupOnlineOffline/FAULTOnlineOnlineNo fail overNo fail overOnlineOffline/FAULTNo fail overOffline/FAULTOffline/FAULTFail overDomain stateUpUpNo fail overUpdownNo fail overDownUpFail overDowndownFail overRecommendations while configuring VCS and Oracle VM Server forSPARC with multiple I/O domains■■■Online and offline operations for service groups in the StorageSG attributeTo manually bring online or take offline service groups that are configured inthe StorageSG attribute do not use the AlternateIO resource or its servicegroup.Instead, use service groups configured in the StorageSG attribute.Freeze the service group for the AlternateIO resourceFreeze the AlternateIO service group before you bring online or take offlineservice groups configured in the StorageSG attribute of the AlternateIOresource. If you do not freeze the service group, the behavior of the LogicalDomain is unknown as it is dependent on the AlternateIO service group.Configuring preonline trigger for storage service groupsYou must configure preonline trigger in the following scenario:When the service groups configured in the StorageSG attribute of theAlternateIO resource are of fail over type, and if you accidentally bring storageservice groups online on another physical system in the cluster.
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<strong>Veritas</strong> Cluster Server: Configuring Oracle VM Server for SPARC for high availabilityConfiguring VCS to manage a Logical Domain using services from multiple I/O domains153Failover scenariosScenarioControl domainAlternate I/O domainVCS behaviorState of eachstorage servicegroupOnlineOffline/FAULTOnlineOnlineNo fail overNo fail overOnlineOffline/FAULTNo fail overOffline/FAULTOffline/FAULTFail overState of eachnetwork servicegroupOnlineOffline/FAULTOnlineOnlineNo fail overNo fail overOnlineOffline/FAULTNo fail overOffline/FAULTOffline/FAULTFail overDomain stateUpUpNo fail overUpdownNo fail overDownUpFail overDowndownFail overRecommendations while configuring VCS <strong>and</strong> Oracle VM Server forSPARC with multiple I/O domains■■■Online <strong>and</strong> offline operations for service groups in the <strong>Storage</strong>SG attributeTo manually bring online or take offline service groups that are configured inthe <strong>Storage</strong>SG attribute do not use the AlternateIO resource or its servicegroup.Instead, use service groups configured in the <strong>Storage</strong>SG attribute.Freeze the service group for the AlternateIO resourceFreeze the AlternateIO service group before you bring online or take offlineservice groups configured in the <strong>Storage</strong>SG attribute of the AlternateIOresource. If you do not freeze the service group, the behavior of the LogicalDomain is unknown as it is dependent on the AlternateIO service group.Configuring preonline trigger for storage service groupsYou must configure preonline trigger in the following scenario:When the service groups configured in the <strong>Storage</strong>SG attribute of theAlternateIO resource are of fail over type, <strong>and</strong> if you accidentally bring storageservice groups online on another physical system in the cluster.
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