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List: lustre-discuss
Subject: Re: [lustre-discuss] lustre-discuss Digest, Vol 154, Issue 3
From: Andreas Dilger <adilger () whamcloud ! com>
Date: 2019-01-04 19:08:50
Message-ID: 5AD39D86-72F7-4D1B-AC09-487625207B1D () whamcloud ! com
[Download RAW message or body]
You can't have multiple MGTs on a single node, but you can share a single MGT between \
multiple filesystems.
Having a separate MGT from the MDTs is best if there are multiple filesystems, since \
it allows you to start/stop the MGS independently of the MDTs.
It is possible to use a shared MGT/MDT with multiple filesystems, and use the "mount \
-t lustre -o nosvc" option to start/stop only the MGS service and not the MDS, but \
that is inconvenient and should be avoided if you are setting up a new filesystem.
Cheers, Andreas
> On Jan 3, 2019, at 22:45, ANS <ans3456@gmail.com> wrote:
>
> I think you can create multiple file systems with mgs on single block device with \
> multiple partitions but there may be performance degradation.
> Try creating and run ior on both file systems individually and at a time.
>
> Rgds,
> ANS
>
> On Fri, Jan 4, 2019 at 2:50 AM <lustre-discuss-request@lists.lustre.org> wrote:
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> Today's Topics:
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> 1. multiple filesystem creation problem (Jae-Hyuck Kwak)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 3 Jan 2019 11:57:02 +0900
> From: Jae-Hyuck Kwak <jhkwak@kisti.re.kr>
> To: lustre-discuss@lists.lustre.org
> Subject: [lustre-discuss] multiple filesystem creation problem
> Message-ID: <7b64f8a0-a5f5-faeb-671e-2c3c3f8b686e@kisti.re.kr>
> Content-Type: text/plain; charset=euc-kr; format=flowed
>
> Hi, all,
> I would like to create multiple lustre filesystem. in this case, should
> mgs be on its own dedicated block device?
> I used to create a combined mgs/mdt filesystem on the block device. is
> it possible to multiple combined mgs/mdt filesystem as following?
> # mkfs.lustre --fsname=test0 --mdt --mgs --index=0 --reformat /dev/sdc
> # mkfs.lustre --fsname=test1 --mdt --mgs --index=1 --reformat /dev/sdd
> # mkdir -p /mnt/test0/mdt0
> # mkdir -p /mnt/test1/mdt1
> # mount -t lustre /dev/sdc /mnt/test0/mdt0
> # mount -t lustre /dev/sdd /mnt/test1/mdt1
>
> BR,
> Jae-Hyuck
>
>
>
>
> ------------------------------
>
> Subject: Digest Footer
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> ------------------------------
>
> End of lustre-discuss Digest, Vol 154, Issue 3
> **********************************************
>
>
> --
> Thanks,
> ANS.
> _______________________________________________
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Cheers, Andreas
---
Andreas Dilger
CTO Whamcloud
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