Serviceguard NFS Toolkit A.11.11.06, A.11.23.05 and A.11.31.03 Administrator's Guide

wait at least 60 seconds after an HA-NFS package has started before mounting file systems
exported from that package.
• The ServiceGuard supports Cross Subnet Failover. However, HA-NFS has a few limitations
with Cross Subnet configurations. For Cross Subnet support details, refer “Managing
Serviceguard” documentation available at: http://www.docs.hp.com/en/B3936-90122/
ch02s02.html#babgighg
• When clusters comprising of both HP Integrity servers and HP 9000 Series 800 computers
are configured with Veritas Cluster File System (CFS) in HP-UX11i v3, NFS clients fail to
access the mounted Cluster File Systems after failover. In such mixed architecture clusters
over CFS, the same file handles are not allowed to be used in both servers of the failover
pair.
NOTE: This issue can be resolved by installing ONCPlus B.11.31.03 or above. See “Editing
the NFS Control Script”.
NOTE: You cannot use Serviceguard NFS for an NFS diskless cluster server.
Overview of Serviceguard NFS Toolkit A.11.31.03 with Serviceguard
A.11.18 and Veritas Cluster File System Support
The Serviceguard NFS Toolkit A.11.31.03 now supports Serviceguard A.11.18, which is configured
with Veritas Cluster File System (CFS). The Serviceguard CFS feature enables you to create a file
system that can be mounted by all nodes in a cluster environment. By configuring Serviceguard
NFS Toolkit to utilize CFS, simultaneous access to files and file systems is expanded to multiple
NFS servers. It provides performance improvement and cache coherency.
For detailed information using the Serviceguard NFS Toolkit A.11.31.03 with Serviceguard
A.11.18 and CFS support, see Serviceguard NFS Toolkit Support for Cluster File System at:http://
docs.hp.com/en/ha.html#Highly%20Available%20NFSThe Serviceguard NFS Toolkit Support for
Cluster File System must be considered as an addendum to this guide.
HP recommends that you use the Serviceguard CFS feature instead of setting up the
server-to-server cross-mounting configuration as show in “Example Four - Two Servers with
NFS Cross-Mounts” (page 62).
The toolkit provides support for the variable HA_NFS_SCRIPT_EXTENSION in the nfs.cntl
control script. This new variable can be used to modify the name of the NFS specific control shell
script, hanfs.sh, which is associated with a package. For example, if you set the
HA_NFS_SCRIPT_EXTENSION variable to hapkg or hapkg.sh, then the NFS specific control
script executed by the package corresponding to the nfs.cntl file is hanfs.hapkg.sh. The
default name of the shell script for the HA_NFS_SCRIPT_EXTENSION variable is hanfs.sh.
Limitations
HA Serviceguard NFS Toolkit A.11.31.03 does not support the modular package feature introduced
with Serviceguard A.11.18. Support for modular packages is planned for a future Serviceguard
NFS Toolkit release.
Overview of the NFS File Lock Migration Feature
Serviceguard NFS introduced the “File Lock Migration” feature beginning with versions A.11.11.03
and A.11.23.02. The detailed information on this feature is as follows:
• Each HA/NFS package designates a unique holding directory located in one of the filesystems
associated with the package. In other words, an empty directory is created in one of the
8 Overview of Serviceguard NFS