Software User Manual

Business Benefits
XP Continuous Access Software provides the following business benefits:
• Supports your business continuity and disaster recovery efforts and plans.
• Provides distance replication while maintaining application and data integrity.
• Improves business resilience by enabling frequent, nondisruptive disaster recovery testing with
an online copy of current and accurate production data.
• Improves service levels by reducing planned and unplanned downtime of customer-facing
applications.
Applications of XP Continuous Access Synchronous and XP Continuous
Access Asynchronous
XP Continuous Access Software provides a storage-based hardware solution for disaster recovery
that enables fast and accurate system recovery. Once XP Continuous Access operations are
established, duplicate copies of data are automatically maintained for backup and disaster recovery
purposes. During normal XP Continuous Access operations, the primary volumes remain online to
all hosts and continue to process both read and write I/O operations. In the event of a disaster or
system failure, the secondary copy of data can be rapidly invoked to allow recovery with a very
high level of data integrity. XP Continuous Access can also be used for data duplication and
migration tasks.
XP Continuous Access Synchronous provides volume-based, real-time data backup and is ideal for
high-priority data backup, duplication, and migration tasks. In the event of a disaster or system
failure at the primary site, the secondary XP Continuous Access Synchronous data can be rapidly
invoked to allow recovery at the volume level with an extremely high level of data integrity.
XP Continuous Access Asynchronous represents a unique and outstanding disaster recovery solution
for large amounts of data that span multiple volumes. The XP Continuous Access Asynchronous
group-based-update sequence-consistency solution enables fast and accurate database recovery,
even after a rolling disaster, without the need for time-consuming data recovery procedures. The
XP Continuous Access Asynchronous volume groups at the remote site can be recovered with full
update sequence consistency, but the updates will be behind the primary site due to the
asynchronous remote-copy operations.
XP Continuous Access Asynchronous provides update sequence consistency for user-defined groups
of volumes (for example, large databases) as well as protection for write-dependent applications
in the event of a disaster.
Program Products that Require XP Continuous Access
HP XP External Storage Access Manager Software can continue business operations immediately
on the remote site when the primary site stops due to an external factor. This program product is
intended for open systems data. You must install both XP External Storage Access Manager and
XP Continuous Access (Synchronous) to use XP External Storage Access Manager. In this manual,
a pair made using XP External Storage Access Manager is called an XP External Storage Access
Manager pair.
The XP Continuous Access program product provides a continuous, uninterrupted, host-independent,
remote data replication solution for disaster recovery or data migration over any distance.
XP External Storage Access Manager is a program product used to copy between short distances
and to continue functions uninterrupted. XP External Storage Access Manager utilizes the remote
copy technology of XP Continuous Access Synchronous.
For more information about XP External Storage Access Manager, see the HP XP24000/XP20000
XP External Storage Access Manager Software User Guide.
8 Overview of XP Continuous Access Software