HP P6000 Cluster Extension Software Administrator Guide (5697-2274, November 2012)

Glossary
array A synonym of storage array, storage system, and virtual array. A group of disks in one or more
disk enclosures combined with controller software that presents disk storage capacity as one or
more virtual disks.
asynchronous A term used to describe computing models that eliminate timing dependencies between sequential
processes. In asynchronous replication, the array controller acknowledges that data has been
written at the source before the data is copied at the destination. Asynchronous write mode is an
optional DR group property.
See also synchronous..
bandwidth The transmission capacity of a link or system, usually measured in bits per second.
bidirectional An array that contains both source and destination virtual disks. A bidirectional configuration
allows multidirectional I/O flow among several arrays.
CA HP P6000 Continuous Access. A storage-based HP solution consisting of two or more arrays
performing disk-to-disk replication, along with management user interfaces that facilitate
configuring, monitoring, and maintaining the replicating capabilities of the arrays.
CIM Common Information Model.
CLI Command-line interface. An interface comprised of various commands which are used to control
operating system responses.
CLX Cluster Extension.
Continuous Access
user interface
A tool for managing the replication of storage objects in a SAN. It provides a graphical user
interface for the management of disk I/O, failover, and maintenance operations. The Continuous
Access user interface is installed on the management server and appears as a software service.
copy set A source-destination pair of virtual disks that are members of a DR group.
data distribution Pushing copies of data to geographic locations to make it more easily accessible to many
customers.
data migration Moving data to a new location or to one with a larger capacity.
data movement P6000 Continuous Access provides for data movement services, such as data backup, data
migration, data distribution, and data mining.
data replication
mode
The operational mode of a DR group that indicates the capability of I/O to be written to its source
and/or its destination.
See also DR mode.
default disk group The disk group that is created when an array is initialized. The minimum number of disks the
group can contain is eight. The maximum is the number of installed disks.
destination vdisk A vdisk that is the recipient of replicated data from a source vdisk.
destination vdisk
access
A storage system's ability to allow host access to a destination vdisk. There are two options:
Disabled•
• Read-only (write-protected)
Device Manager or
Element Manager
Web-based storage environment manager that enables users to configure and monitor storage
controllers. The device manager or element manager resides on the management server.
disaster tolerance The capability for rapid recovery of user data from a remote location when a significant event
or disaster occurs at the local computing site. It is a special combination of high-availability
technology and services that can continue the operation of critical applications in the event of a
site disaster. Disaster-tolerant systems are designed to allow applications to continue operating
during the disaster recovery period.
disk failure
protection
The three levels of disk failure protection are:
None: No protection is present.•
• Single: The capacity of one physical disk is reserved.
• Double: The capacity of two physical disks is reserved.
70 Glossary