Installing and Configuring MC/ServiceGuard NFS
Before Creating an MC/ServiceGuard NFS Package
between the primary and adoptive nodes, the client’s file handle would no longer point to the correct file location after movement of the package to a different node.
It is recommended that filesystems used for NFS be created as journalled file systems (FStype vxfs). This ensures the fastest recovery time in the event of a package switch to another node.
9.Make sure the user IDs and group IDs of those who access the MC/ServiceGuard NFS file system are the same on all nodes that can run the package. Make sure the /etc/passwd and /etc/group files are the same on the primary node and all adoptive nodes, or use NIS to manage the passwd and group databases. For information on configuring NIS, see the Installing and Administering NFS Services manual.
10.Create an entry for the name of the package in the DNS or NIS name resolution files, or in /etc/hosts, so that users will mount the exported file systems from the correct node. This entry maps the package name to the package’s relocatable IP address.
11.Decide whether to place executables locally on each client or on the NFS server. There are a number of
The advantages of keeping executables local to each client are as follows:
•No failover time. If the executables are local to the client, there is no delay if the NFS server fails.
•Faster access to the executables than accessing them through the network.
The advantage of putting the executables on the NFS server is as follows:
•Executable management. If the executables are located in one centralized location, the administrator must update only one copy when changes are made.
If executables are placed on the NFS server, you need to ensure that interrupts are handled correctly in a MC/ServiceGuard environment. The client must mount the filesystem using the nointr option. This mount option will ensure that the executable continues running correctly on the client after a failover of the server occurs. For example, enter the following command on the NFS client:
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