3.4. Applying the Configuration

After you install your PVFS2 I/O Nodes and optionally a PVFS2 Metadata Server and after you've reinstalled all your client nodes, you need to apply the new configuration to the cluster. To do this, execute:

# rocks sync pvfs

This responds with:

        When you run this program, it will REMOVE the
        previous PVFS2 installation. That is, all data
        stored in the previous PVFS2 installation will
        be LOST.

        Are you sure you want to run this program?
        Type YES to run this program:

If you answer YES and if you had a previous instance of PVFS2 running on your cluster, all data from the previous instance will be lost.

If you answer 'YES', then the following will occur:

• PVFS2 configuration files will be generated and sent to each PVFS2 I/O Node and the PVFS2 Metadata Server.

• The PVFS2 server process will be restarted on each PVFS2 I/O Node and the PVFS2 Metadata Server.

• The PVFS2 mount point name will be sent to all nodes in the cluster.

• All nodes in the cluster will mount the PVFS2 file system.

The default mountpoint is /mnt/pvfs2. So to test your installation, execute:

# ls /mnt/pvfs2

You can also run the above command on some client nodes to see if /mnt/pvfs2 mounted.