[Lustre-discuss] Delete ost

[rishi pathak]

We at our site have 3 filesystems sharing one MGS and importantly have got
one node serving all the MDTs w/o any problems.

2010/11/23 Kevin Van Maren <kevin.van.maren at oracle.com>

> Wang Yibin wrote:
> > Hello,
> >
> > 在 2010-11-19，上午3:21， Thomas Johansson 写道：
> >
> >>> I am not sure I understand - Do you have multiple filesystems
> >>> sharing the
> >>> same MGS?
> >>
> >> Yes 5 filesystems on 4 OSS:s and 2 MDS in active/passive failover.
> >> Some 100 TB of space in total.
> >
> > Probably you misunderstood me. You seems to be using 1
> > filesystem(MDSx2/OSSx4) with 5 clients.
> > Making 5 lustre filesystems out of 4OSS/2MDS is a mission-impossible.
>
> No, while it is not often done, there is nothing to prevent 5 Lustre
> file systems from running on 4 OSS nodes and 2 MDS nodes.
> In addition to the MGS, each file system needs one MDT and 1 or more
> OSTs. An OSS can serve up OSTs for multiple file systems, and an MDS
> node can serve up MDTs for multiple file systems (and a node could even
> be both an MDS and OSS at the same time).
>
> Now, if there were a separate MGS for each file system, then it would be
> a different story... each node can really only serve up OSTs or MDTs for
> a single MGS.
>
> Kevin
>
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-- 
Regards--
Rishi Pathak
National PARAM Supercomputing Facility
Center for Development of Advanced Computing(C-DAC)
Pune University Campus,Ganesh Khind Road
Pune-Maharastra
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