To prevent problems with NFS file systems in an HACMP cluster, make sure that each shared volume group has the same major number on all nodes. The lvlstmajor command lists the free major numbers on a node. Use this command on each node to find a major number that is free on all cluster nodes, then, record that number in the Major Number field on the Shared Volume Group/File System
Alternatively, if you use the Task Guide to create your shared volume groups, it will make sure that the major number is the same on all nodes that will share it.
5.4.2 Exporting NFS File Systems
The default scripts provided with HACMP do not use the /etc/exports file. Instead, the default scripts provided call a cl_export_fs utility that uses the exportfs command with the
Therefore export options specified in the /etc/exports file are ignored. However, export options may be specified by modifying the cl_export_fs utility. Alternately, the /etc/exports file can be used as is typical in an NFS environment by simply removing the
5.4.3 NFS Mounting
For HACMP and NFS to work together properly, you must be aware of the following mount issues:
5.4.3.1 Creating NFS Mount Points on Clients
A mount point is required in order to mount a file system with NFS. Mount points are required for NFS clients, not servers; however, you should be aware that a server can also be a client.
5.4.4 Cascading Takeover with Cross Mounted NFS File Systems
This section describes how to set up cascading resource groups with cross mounted NFS file systems.
5.4.4.1 Server-to-Server NFS Cross Mounting
HACMP allows you to configure a cluster so that servers can
