Veritas Storage Foundation™ and High Availability Solutions ...
Veritas Storage Foundation™ and High Availability Solutions ... Veritas Storage Foundation™ and High Availability Solutions ...
140Veritas Cluster Server: Configuring Oracle VM Server for SPARC for high availabilityConfiguring VCS to manage a Logical Domain using services from multiple I/O domainsI/O servicesStorageNetworkBack-end deviceLUN, shared diskFlat filezpoolVeritas CVM volumeNICVCS agents to be usedDiskMountZpoolCVMVolDGNICDetermine the number of nodes to form VCS clusterThe total number of nodes that form a VCS cluster depends on the number ofphysical systems times the the control domain and alternate I/O domain on eachphysical system.For example, if you have two physical systems, each having a control domain andan alternate I/O domain, you need to configure VCS as a four node cluster.Install and configure VCS inside the control domain and alternate I/OdomainConfiguring storage servicesInstall and configure VCS inside the control domain and alternate I/O domainFor more details, refer to the Veritas Cluster Server Installation Guide.Depending upon the storage service, the configuration procedure differs.■■■■LUN, Shared Disk, or CVM volumeSee “About virtual disk multipathing for storage services” on page 141.See “Configuring virtual disk multipathing for LUN, Shared Disk, or CVMVolume” on page 141.ZFS volumeSee “Configuring storage services when back-end device is a ZFS volume”on page 142.Flat fileFor more information, refer to the LDom Administrator’s guide.ZpoolFor more information, refer to the LDom Administrator’s guide.
Veritas Cluster Server: Configuring Oracle VM Server for SPARC for high availabilityConfiguring VCS to manage a Logical Domain using services from multiple I/O domains141About virtual disk multipathing for storage servicesYou must configure virtual disk multipathing only if the storage back-end deviceis a LUN, Shared Disk, or CVM volume.Virtual disk multipathing enables you to configure a virtual disk on a guest LogicalDomain to access its back-end storage by more than one path. This feature ensuresthat the virtual disk accessed by the guest logical domain remains accessible aslong as services from one of the I/O domain are available.For example, if you set up a virtual disk multipathing configuration to access aphysical disk from a shared storage that is connected to more than one servicedomain. So, when the guest domain accesses the virtual disk, the virtual diskdriver goes through one of the service domains to access the back-end storage. Ifthe virtual disk driver cannot connect to the service domain, the virtual diskattempts to reach the back-end storage through a different service domain.Configuring virtual disk multipathing for LUN, Shared Disk, orCVM VolumeTo enable virtual disk multipathing, you must export a virtual disk back-end pathfrom each service domain and add the virtual disks to the same multipathinggroup (mpgroup). The mpgroup is identified by a name and is configured whenyou export the virtual disk back-end.
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140<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 domainsI/O services<strong>Storage</strong>NetworkBack-end deviceLUN, shared diskFlat filezpool<strong>Veritas</strong> CVM volumeNICVCS agents to be usedDiskMountZpoolCVMVolDGNICDetermine the number of nodes to form VCS clusterThe total number of nodes that form a VCS cluster depends on the number ofphysical systems times the the control domain <strong>and</strong> alternate I/O domain on eachphysical system.For example, if you have two physical systems, each having a control domain <strong>and</strong>an alternate I/O domain, you need to configure VCS as a four node cluster.Install <strong>and</strong> configure VCS inside the control domain <strong>and</strong> alternate I/OdomainConfiguring storage servicesInstall <strong>and</strong> configure VCS inside the control domain <strong>and</strong> alternate I/O domainFor more details, refer to the <strong>Veritas</strong> Cluster Server Installation Guide.Depending upon the storage service, the configuration procedure differs.■■■■LUN, Shared Disk, or CVM volumeSee “About virtual disk multipathing for storage services” on page 141.See “Configuring virtual disk multipathing for LUN, Shared Disk, or CVMVolume” on page 141.ZFS volumeSee “Configuring storage services when back-end device is a ZFS volume”on page 142.Flat fileFor more information, refer to the LDom Administrator’s guide.ZpoolFor more information, refer to the LDom Administrator’s guide.
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