Data is large and cannot be copied to the local drives od the compute
nodes as the data is large.
I understand that.
I think that you have storage attached to your cluster head node - the
'SAN storage' you refer to.
Lets' call that volume /data
All you need to do is edit the /etc/exports file on the cluster head node,
and include the name of that storage area. Just cut and paste one of
the other lines inthe file, which will have a definition of the IP
Address range of
the cluster nodes and the mount parameters.
On all the cluster nodes, you will need to run a command 'mkdir /data/
The create a new /etc/fstab file with an additional line which
contains /data and the name of the cluster head node
You will then have to update the node image with this new /etc/fstab,
or push the /etc/fstab out to all compute nodes
finally run the command 'mount /data/ on all compute nodes.