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Disaster Recovery
Replication technology has typically been used to address disaster recovery issues. Disaster recovery is still
the driving business case behind replication. Remote replication can be implemented from the production site
to one or more remote sites across a campus, across town, across a state or across the country. When a
disaster strikes the primary location, the applications can be brought up at the remote site and continue
processing against the replicated copies. When the primary site is back online, the replication can be reversed
and when the data is resynchronized, processing can be switched back to the primary site and business can
continue. In the past, if an e-mail system experienced a disaster it was an "oh well" moment. The loss of a day
or more of e-mail was not considered important. Today, e-mail is a critical component of many companies'
business plans and recovering e-mail after a disaster quickly and completely is required.
Maintenance
HP Remote Snap software can also be used to solve other business needs. For instance, E-mail servers may
need periodic maintenance that can take hours to complete. With remote replication in place, the downtime
can be minimal (as long as it takes to bring the remote peer of the primary e-mail server online). The primary
server can be worked on (patches, hardware upgrades, etc.) and then brought back online and into production.
A whole datacenter can be failed over to a remote site on purpose to perform maintenance on generators, air
conditioning, etc. Replication can also be used to perform a datacenter move with minimal downtime (fail
everything to the DR site, move the production datacenter to its new location then fail the DR site back to the
new datacenter).
Storage Based
Data replication is performed at the storage subsystem controller level and is totally transparent to the host,
alleviating unnecessary host cycles to perform the data mirroring functions. Unlike a fabric based or host
based solution, the storage based solution dedicates its resources to managing the replication process
between arrays, with minimal impact to applications, other data or devices on the SAN.
QuickSpecs
HP MSA P2000 G3 Modular Smart Array Systems
Hardware
DA - 13551 North America — Version 36 — December 9, 2013
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