Backups And Clusters - Novell NETWARE 6-DOCUMENTATION Manual

Backups and Clusters

Novell Cluster Services
into high-availability cluster, where resources can be dynamically switched or
moved to any server in the cluster. Consolidation of applications and
operations on a cluster has benefits such as lower costs, scalability, and
increased availability. See the
www.novell.com/documentation)
For a cluster to work as a high-availability system, the file system, the
applications, and services that run on the cluster should be cluster-
enabled.SBCON supports backup and restore of cluster-enabled pools. In
addition, the backup session can be automatically recovered in case of a
failover or failback condition.
NOTE:
Backup and restore of cluster-enabled pools is not supported in NetWare
versions earlier than NetWare 6.
SBCON supports automatic recovery of backup sessions if failover or failback
occurs. The backup engine reconnects to the Target Service Agent and
resumes the backup from where it had terminated. Various cluster options like
Enable Auto-Recovery and Retry Interval are provided by SBCON. You can
use the default values or reset the values while submitting the backup job. The
engine begins the reconnection attempts after waiting for a configurable time,
and then retries at regular intervals until the connection is re-established or the
number of retries has expired.
After the connection is re-established, the internal structures of the TSA are
built and the recovered session is continued from where it had terminated.
User intervention is not required during the recovery period. You can view the
status in the Session Report screen.
Consider the following before preparing for backup and restore of cluster-
enabled pools:
Use TSA600.NLM to backup or restore cluster-enabled pools. (See
"Target Service Agents (TSAs)" on page 30
If SBCON is loaded on a cluster node and a backup session for a cluster-
enabled pool is submitted, the session cannot be recovered if a failover or
failback condition occurs on the host server.
SBCON can backup and restore only one cluster-enabled pool per
session. This is because the engine is connected to the cluster pool instead
of the server.
allows you to configure up to 32 NetWare servers
TM
Novell Cluster Services documentation (http://
for more information.
for details.)
Overview
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