[Lustre-discuss] MGS - one per site

[Carlos Santana]

On Fri, Jun 26, 2009 at 10:57 AM, Brian J. Murrell<Brian.Murrell at sun.com> wrote:
> On Fri, 2009-06-26 at 10:52 -0500, Carlos Santana wrote:
>> Can a lustre file system have more than one MGS?
>
> No.  It can have multiple failover paths to a single MGS, but max. 1 MGS
> per filesystem.
>
>> Isn't it only one per
>> site?
>
> It can be, and that's how it was designed.  IOW, a single MGS can serve
> multiple filesystems.
>
>> I saw some examples where target type mgs was mentioned during
>> mkfs.lustre for MDS and OSS nodes.
>
> Yes.  You have to tell the MDSes and OSSes (and clients, via their mount
> target) where the MGS(es, for failover) are.
I know we need to specify --mgsnode, however I saw target type '--mgs'
being specified on MGS and OSS. May be it was for failover.

>
> b.
>
>
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