Hey Sandra,
The mmdynamicmap is used when auto-mounting GPFS on a node the GPFS
software installed (see also /var/mmfs/gen/mmIndirectMap when gpfs -A is
set to 'automount'.)
For NFS clients, I like autofs a lot.
There are two types of map, hence an example for each:
Direct maps
/etc/auto.master, add the line:
/- /etc/auto.gpfsnfs
/etc/auto.gpfsnfs, add the line:
/path/to/mountpoint -fstype=nfs,nfsvers=3
ctdbclustername:/path/to/nfsexport
Indirect Maps
For home directories, you can mount them using an indirect map so as to
only mount the logged in user's home directory.
(or mount them all, using a direct map for their containing folder)
/etc/auto.master, add the line:
/path/to/homedirsmount /etc/auto.homedirs
/etc/auto.homedirs, add the line:
* homeserver:/path/to/homedirs/&
Test in a sandpit.
I would imagine you might need to make sure that your NFS mount point
reflects the same path as on a GPFS client/server.
Once you're happy this works, you can push out the maps from your
ldap/puppet/other service.
I'm sure other folks also have their methods, chime in.
Regards,
Jez
---
GPFS UG Chair
On 11/07/13 12:24, McLaughlin, Sandra M wrote:
Hi,
I would just like some opinions on the best way to serve a gpfs file
system to server/workstations which are not directly connected to the
storage.
Background: We are in the process of moving from old storage (approx
20TB); lots of filesystems -- JFS2 on AIX with HACMP. served out with
NFS to a linux cluster and about 150 linux workstations and random
other servers; to new storage (approx 250TB); 2 gpfs filesystems,
Linux NSDs, using ctdb for NFS and Samba. We have also installed a
server for TSM, which is SAN connected to the gpfs, and have some new
compute servers which are also on the SAN, and therefore have pretty
good performance.
Should I still use the automounter ? Different maps or symbolic links
to emulate the automounter names for the servers that are directly
SAN-connected gpfs clients ? /home//username/ or whatever has to work
on all systems.
I found a bit in the gpfs problem determination guide suggesting that there is
a way to use an automounter program map for gpfs
(/usr/lpp/mmfs/bin/mmdynamicmap)but I can't find any other documentation about
it.
I would really like to hear how other people with a similar setup are doing this.
Thanks, Sandra.
*Sandra McLaughlin*
Scientific Computing Specialist
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*AstraZeneca*
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