Veritas Storage Foundation 5.1 SP1 Cluster File System Installation Guide (5900-1510, April 2011)

Table 1-1
Contents of Veritas Storage Foundation Cluster File System products
(continued)
Products and featuresStorage Foundation Cluster File System
Veritas File System
Veritas Volume Manager
Veritas Quick I/O option
Global Cluster Option
Veritas Extension for Oracle Disk Manager
option
Veritas Storage Checkpoint option
Veritas Storage Mapping option
Optionally licensed features:
Veritas Volume Replicator
Storage Foundation Cluster File System HA
About I/O fencing
I/O fencing protects the data on shared disks when nodes in a cluster detect a
change in the cluster membership that indicates a split-brain condition.
The fencing operation determines the following:
■ The nodes that must retain access to the shared storage
■ The nodes that must be ejected from the cluster
This decision prevents possible data corruption. The installer installs the I/O
fencing driver, VRTSvxfen, when you install Storage Foundation Cluster File
System. To protect data on shared disks, you must configure I/O fencing after you
install and configure Storage Foundation Cluster File System.
I/O fencing technology uses coordination points for arbitration in the event of a
network partition.
You can configure I/O fencing to use one or both of the following components as
coordination points:
I/O fencing that uses coordinator disks is referred
to as disk-based I/O fencing.
Disk-based I/O fencing ensures data integrity in
a single cluster.
Coordinator disk
About Storage Foundation Cluster File System
About I/O fencing
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