[gpfsug-discuss] gpfs/nfs/autofs

Pete Smith pete at realisestudio.com
Fri Jul 12 17:21:36 BST 2013


Push from ldap works great.

On 12 July 2013 14:59, Jez Tucker (GPFS UG Chair) <chair at gpfsug.org> wrote:
> 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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>
> R&D | R&D Information
>
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>
> sandra.mclaughlin at astrazeneca.com
>
>
>
>
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-- 
Pete Smith
DevOp/System Administrator
Realise Studio
12/13 Poland Street, London W1F 8QB
T. +44 (0)20 7165 9644

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