Serviceguard NFS Toolkit A.11.11.04 and A.11.23.03 Administrator's Guide

Overview of Serviceguard NFS
Overview of the NFS File Lock Migration Feature
Chapter 1 11
• Any client that holds NFS file locks against files residing in the
HA/NFS package (transitioned between servers) sends reclaim
requests to the adoptive node (where the exported filesystems
currently reside) and reclaims its locks.
• After rpc.statd sends the crash recovery notification messages, the
SM entries in the package holding directory are removed, and the
nfs.flm script is started on the adoptive node. The script once again
copies each /var/statmon/sm file on the HA/NFS server into the
holding directory, every five seconds. Each file residing in the
/var/statmon/sm directory on the adoptive node following the
package migration represents a client that either reclaimed its locks
after failover or has established new locks after failover.
NOTE To enable the File Lock Migration feature, you need Serviceguard
version A.11.15 or above.
To ensure that the File Lock Migration feature functions properly, install
HP-UX 11i v1 NFS General Release and Performance Patch,
PHNE_26388 (or a superseding patch). For HP-UX 11i v2, the feature
functions properly without a patch.
B5140-90021.book Page 11 Wednesday, November 17, 2004 10:52 AM