Veritas Volume Manager 5.1 SP1 Administrator"s Guide (5900-1506, April 2011)

Association not resolved
Association count is incorrect
Duplicate record in configuration
Configuration records are inconsistent
These errors are typically reported in association with specific disk group
configuration copies, but usually apply to all copies. The following is usually
displayed along with the error:
Disk group has no valid configuration copies
See the Veritas Volume Manager Troubleshooting Guide.
About the cluster functionality of VxVM
A cluster consists of a number of hosts or nodes that share a set of disks. The
following are the main benefits of cluster configurations:
If one node fails, the other nodes can still access the shared disks.
When configured with suitable software, mission-critical applications
can continue running by transferring their execution to a standby
node in the cluster. This ability to provide continuous uninterrupted
service by switching to redundant hardware is commonly termed
failover.
Failover is transparent to users and high-level applications for
database and file-sharing. You must configure cluster management
software, such as Veritas Cluster Server (VCS), to monitor systems
and services, and to restart applications on another node in the event
of either hardware or software failure. VCS also allows you to perform
general administration tasks such as making nodes join or leave a
cluster.
Note that a standby node need not remain idle. It could be used to
serve other applications in parallel.
Availability
Clusters can reduce contention for system resources by performing
activities such as backup, decision support and report generation on
the more lightly loaded nodes of the cluster. This allows businesses
to derive enhanced value from their investment in cluster systems.
Off-host
processing
The Cluster Volume Manager (CVM) is capable of supporting clusters with up to
64 nodes. Symantec has tested and qualified product configurations of up to 32
nodes on IA-64 (Itanium) at the time of the release. For more updates on this
support, see the late breaking news tech note.
439Administering cluster functionality (CVM)
About the cluster functionality of VxVM