An NFS server is a host that “exports” its local
directories (makes them available for client hosts to mount using
NFS). On the NFS client, these mounted directories look to users like
part of the client’s local file system.
Serviceguard allows you to create high availability clusters
of HP Linux computers (nodes). A high availability computer system
allows applications to continue in spite of a hardware or software
failure. Serviceguard systems protect users from software failures
as well as from failure of a system processing unit (SPU) or local
area network (LAN) component. In the event that one component fails,
the redundant component takes over, and Serviceguard coordinates the
transfer between components.
Serviceguard NFS is a separate set of shell scripts, and a binary
file. One shell script (NFS control script) is provided as a template
for an NFS server package. Customize this script to meet your specific
needs.
In the event of failure, the NFS server package containing the
exported file systems moves to a different node in the Serviceguard
cluster. After Serviceguard starts the NFS package on the adoptive
node, the NFS file systems are re-exported from the adoptive node
with minimum disruption of service to users. The client side “hangs”
until the NFS server package comes up on the adoptive node. When the
service returns, the user can continue access to the file. You do
not need to restart the client.
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