Security Solutions

Glossary
A
application restart Starting an application, usually on another node, after a failure. Application can be restarted
manually, which might be necessary if data must be restarted before the application can run
(example: Business Recovery Services work like this.) Applications can by restarted by an operator
using a script, which can reduce human error. Or applications can be started on the local or
remote site automatically after detecting the failure of the primary site.
arbitrator Nodes in a disaster recovery architecture that act as tie-breakers in case all of the nodes in a
data center go down at the same time. These nodes are full members of the Serviceguard cluster
and must conform to the minimum requirements. The arbitrator must be located in a third data
center to ensure that the failure of an entire data center does not bring the entire cluster down.
See also quorum server.
B
BC (Business Copy) A PVOL or SVOL in an HP StorageWorks XP series disk array that can be split
from or merged into a normal PVOL or SVOL. It is often used to create a snapshot of the data
brought at a known point in time. Although this copy, when split, is often consistent, it is not
usually current.
BCV (Business Continuity Volume) An EMC Symmetrix term that refers to a logical device on the EMC
Symmetrix that might be merged into or split from a regular R1 or R2 logical device. It is often
used to create a snapshot of the data brought at a known point in time. Although this copy, when
split, is often consistent, it is not usually current.
Business Recovery
Service
Service provided by a vendor to host the backup systems required to run mission critical
applications following a disaster.
C
campus cluster A single cluster that is geographically dispersed within the confines of an area owned or leased
by the organization such that it has the right to run cables above or below ground between
buildings in the campus. Campus clusters are usually spread out in different rooms in a single
building, or in different adjacent or nearby buildings. See also extended distance cluster.
cluster A cluster in production that has packages protected by the HP Continentalclusters product.
cluster alarm Time at which a message is sent indicating that the cluster is probably in need of recovery. The
cmrecoverclcommand is enabled at this time.
cluster alert Time at which a message is sent indicating a problem with the cluster.
cluster event A cluster condition that occurs when the cluster goes down or enters an UNKNOWN state, or
when the monitor software returns an error. This event might cause an alert messages to be sent
out, or it might cause an alarm condition to be set, which allows the administrator on the Recovery
Cluster to issue the cmrecovercl command. The return of the cluster to the UP state results in
a cancellation of the event, which might be accompanied by a cancel event notice. In addition,
the cancellation disables the use of the cmrecovercl command.
cluster quorum A dynamically calculated majority used to determine whether any grouping of nodes is sufficient
to start or run the cluster. Cluster quorums prevent split-brain syndrome which can lead to data
corruption or inconsistency. Currently at least 50% of the nodes plus a tie-breaker are required
for a quorum. If no tie-breaker is configured, then greater than 50% of the nodes is required to
start and run a cluster.
complex workload Complex workloads are applications that are configured using multiple inter-related packages
that are managed collectively
Continentalclusters
A group of clusters that use routed networks and/or common carrier networks for data replication
and cluster communication to support package failover between separate clusters in different
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