Symantec 5 User Manual
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.
change in the cluster membership that indicates a split brain condition.
See the Veritas Cluster Server User's Guide.
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 installvcs program installs
the VCS I/O fencing driver, VRTSvxfen. To protect data on shared disks, you must
configure I/O fencing after you install and configure VCS.
the VCS I/O fencing driver, VRTSvxfen. To protect data on shared disks, you must
configure I/O fencing after you install and configure VCS.
I/O fencing technology uses coordination points for arbitration in the event of a
network partition.
network partition.
Note:
Symantec recommends that you use I/O fencing to protect your cluster
against split-brain situations.
About VCS optional components
You can add the following optional components to VCS:
See
on page 19.
Symantec Product
Authentication Service
Authentication Service
See
on page 20.
Veritas Cluster Server
Management Console
Management Console
See
on page 20.
Cluster Manager (Java console)
See
on page 20.
VCS Simulator
To configure the optional components, make sure to install all RPMs when the
installation program prompts you.
installation program prompts you.
illustrates a sample VCS deployment with the optional components
configured.
Introducing Veritas Cluster Server
About VCS optional components
About VCS optional components
18