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Novell Business Continuity Clustering 1.1 for NetWare Administration Guide
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SAN-based synchronous mirroring is preferred and is provided by SAN hardware manufacturers.
Host-based synchronous mirroring functionality is included with the NSS file system (NSS
mirroring) that is part of NetWare 6.5.
NOTE:
The Business Continuity Cluster 1.1 product does not perform data mirroring. You must
configure either SAN-based mirroring or host-based mirroring separately.
NSS mirroring is a checkpoint-based synchronous mirroring solution. Data blocks are written
synchronously to multiple storage devices. It is an alternative to SAN array-based synchronous
replication options.
IMPORTANT:
NSS Snapshot technology does not work in a business continuity cluster.
Figure 2-2
Synchronous Mirroring
2.4.1 Configuring NSS Mirroring
NSS partitions must be mirrored after they are created. If you have an existing partition that you
want to mirror, you can either create another partition of equal size on another device to mirror the
first partition to, or let the mirroring software automatically create another partition of equal size on
another device.
When you create a Novell Cluster Services system that utilizes shared storage space (a Storage Area
Network or SAN), it is important to remember that all servers attached to the shared device, whether
in the cluster or not, have access to all of the volumes on the shared storage space unless you
specifically prevent such access. Novell Cluster Services arbitrates access to shared volumes for all
cluster nodes, but cannot protect shared volumes from being corrupted by noncluster servers.
Server 6
Server 7
Server 5
Server 8
Fibre Channel
Switch
Building A
Building B
Server 2
Server 3
Server 1
Server 4
Fibre Channel
Switch
Fibre Channel
Disk Array
Synchronous
Mirroring
Mirror
Original
Ethernet Switch
Ethernet Switch
Fibre Channel
Disk Array
Changes
Completion
Содержание BUSINESS CONTINUITY CLUSTERING FOR NETWARE 1.1 - ADMINISTRATION
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