Cisco Cisco UCS C250 M2 Extended-Memory Rack Server 백서
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A VSA SAN behaves like a conventional iSCSI SAN, except that instead of running on an external physical storage system,
the iSCSI storage appliance runs in a virtual machine on a hypervisor in a host server. Storage devices assigned to the VSA
are treated as pool storage, from which iSCSI targets can be created. These iSCSI targets are usually assigned to hypervisor
hosts, where they are formatted with a file system, but they can be mounted on any iSCSI initiator. Each hypervisor server can
run a VSA, and iSCSI targets can be presented from the internal or direct-attached storage (DAS). These targets can also be
mirrored between VSAs to create highly available storage. If one hypervisor host and its VSA become inactive or fail, the other
hypervisor servers can continue to access the storage using the surviving VSA.
the iSCSI storage appliance runs in a virtual machine on a hypervisor in a host server. Storage devices assigned to the VSA
are treated as pool storage, from which iSCSI targets can be created. These iSCSI targets are usually assigned to hypervisor
hosts, where they are formatted with a file system, but they can be mounted on any iSCSI initiator. Each hypervisor server can
run a VSA, and iSCSI targets can be presented from the internal or direct-attached storage (DAS). These targets can also be
mirrored between VSAs to create highly available storage. If one hypervisor host and its VSA become inactive or fail, the other
hypervisor servers can continue to access the storage using the surviving VSA.
Figure 4. StorMagic SvSAN
SvSAN
Synchronous
Mirroring
WAN
NSH
VM
VM
VM
VM
vSphere
vSphere
SvSAN
SvSAN
SvSAN benefits include:
• Abstraction of storage services away from traditional storage arrays, making it an important component of a software-
• Abstraction of storage services away from traditional storage arrays, making it an important component of a software-
defined storage strategy
• Elimination of the need for a physical SAN
• Virtualization of internal disk drives and external, DAS arrays to enable storage sharing among multiple servers
• High availability in a simple two-server solution
• At least 33 percent lower capital acquisition costs for distributed environments
• Over 40 percent lower TCO through reduced power and cooling costs, decreased sparing and maintenance costs, and
reduced need for dedicated IT resources
• Greater application uptime
• Centralized storage management of entire multi-site infrastructure
• Rapid, scripted deployment and simultaneous updating of multiple sites through automated provisioning
• Optimal flexibility, because SvSAN is hardware and hypervisor independent and can scale as storage requirements grow
• Fast resynchronization through its restore capability, enabling users to replace a failed server with a new one and
automatically rebuild the environment