[Lustre-discuss] [wc-discuss] joining two differents mgs in one

Tim Carlson tim.s.carlson at gmail.com
Fri Jun 29 12:13:29 PDT 2012

This isn't really what he wants to do is it? I think he wants to what
what is more or less impossible and that is take four distinct file
systems and magically merge the meta data into a cohesive single
MGS/MDS while retaining all the data.

Like I currently have /a and /b  that use  MGS1 and /c and /d that use
MGS2. How can I combine MGS1 and MGS2 into MGS3 and retain the data of
/a /b /c /d?


On Fri, Jun 29, 2012 at 10:28 AM, Nathan Rutman
<nathan_rutman at xyratex.com> wrote:
> Two ways I can think of:
> 1. mount the MGS disks as ldiskfs and copy the config files from the old MGS to the new, and point all the servers to use the new MGS ipaddr with tunefs
> 2. writeconf all the servers, setting mgsnode as the new one.  This will regenerate all the config files on the new MGS.
> On Jun 28, 2012, at 9:12 PM, Philippe Weill wrote:
>> Hello
>> for moment and for historic reason we have four lustre filesystem on two different mgs-mds
>> each mgs-mds having two filesystems ( 1.8.7wc1 )
>> we want to change our mgs-mds infrastructure ( new hardware )
>> and keeping only one mgs and mds server for all the filesystem
>> I know how to move mdt on new hardware and changing IP
>> but how can we join the two distinct mgs device in one
>> Thanks in advance
>> --
>> Weill Philippe -  Administrateur Systeme et Reseaux

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