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62Storage Foundation and High Availability Solutions support for Oracle VM Server for SPARCTerminology for Oracle VM Server for SPARC■■■■Using Veritas Volume Manager snapshots for cloning logical domain bootdisksConfiguring Oracle VM Server for SPARC guest domains for disaster recoverySoftware limitationsKnown issuesTerminology for Oracle VM Server for SPARCThe following terminology is used in configuring the Veritas software in OracleVM Server for SPARC.Table 4-1TermLogical domainHypervisorLists the terminology for Oracle VM Server for SPARCDefinitionLogical domain or virtual machine with itsown operating system, resources, andidentity within the same physical host.A firmware layer that provides a set ofhardware-specific support functions to theoperating systems running inside logicaldomains through a stable interface, knownas the sun4v architecture. The hypervisor isinterposed between the operating systemand the hardware layer.Logical Domains ManagerSoftware that communicates with theHypervisor and logical domains to sequencechanges, such as the addition and removalof resources or creation of a logical domain.The Logical Domains Manager provides anadministrative interface and keeps track ofthe mapping between the physical andvirtual devices in a system.Control domainThe primary domain which provides aconfiguration platform to the system for thesetup and teardown of logical domains.Executes Logical Domains Manager softwareto govern logical domain creation andassignment of physical resources.
Storage Foundation and High Availability Solutions support for Oracle VM Server for SPARCOracle VM Server for SPARC deployment models63Table 4-1TermI/O domainGuest domainVirtual devicesLists the terminology for Oracle VM Server for SPARC (continued)DefinitionControls direct, physical access toinput/output devices, such as PCI Expresscards, storage units, and network devices.The default I/O domain is the controldomain.Utilizes virtual devices offered by controland I/O domains and operates under themanagement of the control domain.Physical system hardware, including CPU,memory, and I/O devices that are abstractedby the Hypervisor and presented to logicaldomains within the platform.Logical Domains Channel (LDC)Virtual Disk ClientVirtual Disk ServerA logical domain channel is a point-to-point,full-duplex link created by the Hypervisor.LDCs provide a data path between virtualdevices and guest domains and establishvirtual networks between logical domains.A Solaris kernel module in the guest domainwhich controls the virtual disks visible tothat guest, providing standard deviceinterfaces to applications.A Solaris kernel module in the controldomain which is responsible for exportingvarious backend devices as virtual disks toguest domains.Oracle VM Server for SPARC deployment modelsOracle VM Server for SPARC is a virtualization technology on the Solaris SPARCplatform that enables the creation of independent virtual machine environmentson the same physical system. This allows you to consolidate and centrally manageyour workloads on one system.Veritas Storage Foundation supports logical domains in the following twodeployments models:■■Split Storage Foundation stackGuest-based Storage Foundation stack
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Technical SupportContacting Technic
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