HP StorageWorks Enterprise Virtual Array Cluster FIO Starter Kit Guida Utente Pagina 202

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target port A Fibre Channel port capable of presenting one or more SCSI LUNs to servers.
A target is also known as the destination of a server's I/O request.
task In VSM, a process that carries out a data moving task on a group.
temporary virtual
disk
A virtual disk created when a PiT is created on another virtual disk. The temporary
virtual disk holds any modifications redirected from the original virtual disk after
the PiT is created.
thick provisioned A quality of virtual disks wherein the virtual disks allocated capacity is always
equal to its total capacity.
See also virtual disk.
thin provisioned A quality of virtual disks wherein the virtual disks allocated capacity is set to a
small initial value that can expand up to the virtual disks total capacity according
to actual usage.
transaction
consistent
The state of the media behind a logical unit, such that all pending writes have
been completed, and all caches are empty.
transceiver A device that provides an interface between the Data Path Module hardware
and the external network cable. The Data Path Module uses 4Gbps optical
small form-factor pluggable transceivers.
UDH User defined hosts are all servers other than the VSM servers that are attached
to the SVSP domain.
valid boot set A DPM boot set that contains a usable system image.
VDG Virtual Disk Group. A single entity that encapsulates multiple virtual disks or
snapshots to enable synchronized operations on the members.
virtual disk In VSM, a unit of storage allocated to one or more hosts from a storage pool. A
virtual disk can range in size from 1 GB to 2 TB. DPMs present allocated virtual
disks to hosts as logical drives.
VMA Virtualization Management Appliance.
Volume Shadow
Copy Service
A backup infrastructure for the Microsoft Windows Server 2003/2008 operating
systems, as well as a mechanism for creating consistent point-in-time copies of
data known as shadow copies.
VSM Virtualization Services Manager. Short for the HP StorageWorks SAN
Virtualization Services Platform Manager application.
VSM API virtual
disk
A virtual disk that enables a host to direct VSM CLI commands to a VSM server
through a DPM.
VSM client The management interface for VSM servers. The VSM client runs on any PC
connected to a VSM server workstation through an IP connection.
VSM server VSM software that runs on a dedicated appliance connected to a SAN fabric
and manages and controls all storage systems on the SAN. A VSM server
virtualizes the storage space on the storage systems, creates storage pools and
virtual disks, and provides agents with virtual disk information. The VSM server
also moves data in snapclone, migration, and asynchronous mirroring operations.
VSS See Volume Shadow Copy Service.
Glossary202
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