[Lustre-discuss] adding 2nd network to lustre

Andreas Dilger adilger at sun.com
Fri Jan 9 17:07:36 PST 2009

On Jan 09, 2009  18:31 -0500, Chris Hunter wrote:
> Andreas Dilger wrote:
>> On Jan 07, 2009  18:16 -0500, Chris Hunter wrote:
>>> We currently use lustre over an infiniband network. We would like to  
>>> allow ethernet clients (ie. no infiniband) to use the same lustre FS.
>>> The MDT and OSTs were all created using only the MGS infiniband   
>>> interface (ie. mkfs.lustre --mgsnode= at ib0).
>>> So I am missing some configuration for the tcp network. My best guess 
>>> we  need to use the "tunefs.lustre" command to add the mgs tcp NID to 
>>> the  MDT. However this command won't execute while lustre is mounted.
>>> Any suggestions how to add the tcp network to our existing lustre ib  
>>> network ?
>> I believe this is documented in the Lustre manual at http://manual.lustre.org/
> Section 7 of the operations manual does discuss multihomed lustre  
> servers. The example given is destructive -- lustre needs to be  
> reformatted (mkfs.lustre) for multihoming. Can we setup multihoming with  
> our re-formating our lustre FS ?

Yes, definitely.  It should only require a --write-conf...  I think this
has been answered previously on this list, but if not Isaac should get
it into the manual.

Cheers, Andreas
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.

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