[Lustre-discuss] drbd async mode

[Timh Bergström]

Id like a copy of that document. We're running a similar setup which
is not documented at all, more ad-hoc and in difference we're not
running stonith and we have a raid1+0 in each (mds)node, raid 1 over
drbd and sync-mode B.

Regards,
Timh

2008/9/22 Heiko Schroeter <schroete at iup.physik.uni-bremen.de>:
> Am Dienstag, 2. September 2008 22:24:58 schrieb Andreas Dilger:
>
> We are using a setup with the following spec:
>
> mds1 and mds2:
> 2 SATA Disks for MDS inside running raid0 with mdam tools.
> Above this drbd for network raid0 and
> Above that HA for failover.
>
> Besides that stonith is running inside HA for a real kill of the other node in
> case of trouble.
>
> Works good and reliable. We tested this real hard.
>
> If it is of general interest i could put down some notes how we did it but it
> will take some days.
> (I have do do it anyway for our docs ...)
> So please let me know if somebody is interested in this.
>
> Regards
> Heiko
>
>
>
>> On Aug 30, 2008  16:35 -0400, Mag Gam wrote:
>> > Sorry Andrea, I would like to know this too. Hopefully someone here
>> > has done this before. Its worth a wiki
>>
>> Common case is use of Linux-HA to manage primary/backup for each OST/MDT.
>> Since Lustre 1.6+ uses "mount" and "unmount" to start/stop Lustre services
>> this can be set up relatively easily with Linux-HA.  There is likely even
>> something in the Lustre manual.
>>
>> > On Thu, Aug 14, 2008 at 3:05 AM, Andrea Frittoli
>> >
>> > <andrea.frittoli at gmail.com> wrote:
>> > > I'm trying a Lustre + DRBD set-up, I would like to use DRBD with the
>> > > following setup:
>> > >
>> > > on MDS: DRBD emulates an MDT on shared storage. From Lustre
>> > > perspective one MDS is active, the other is passive
>> > > on OSS: BRBD emulates two OST on shared storage for each OSS couple.
>> > >
>> > > >From Lustre perspective each OSS is active for one OST and passive for
>> > >
>> > > the other.
>> > >
>> > > I'm planning to use DRBD in active/passive mode, so that the storage
>> > > is mounted only on the active server, and luster is mounted on top.
>> > > I'm not sure how to sync the mount/umount of the DRBD partition and
>> > > the mount of MDT/OST upon failover.
>> > >
>> > > The target setup shall have 2 MDS (1 couple) and 8 OST (4 couples),
>> > > dedicate LANs for heartbeat and drbd.
>> > >
>> > > Do you have any details of your setup you may share about this?
>> > >
>> > > TIA!
>> > >
>> > > On Aug 12, 4:50 am, "Mag Gam" <magaw... at gmail.com> wrote:
>> > >> Ha yes..I seen this before Sebastein. :-)
>> > >>
>> > >> I wanted to see if other people have tried it and their thoughts were.
>> > >>
>> > >> thats all
>> > >> TIA
>> > >>
>> > >> On Mon, Aug 11, 2008 at 2:33 AM, Sébastien Buisson
>> > >>
>> > >> <sebastien.buis... at bull.net> wrote:
>> > >> > Hello,
>> > >> >
>> > >> > I ran some tests with DRBD and Lustre a few months ago (including in
>> > >> > async mode). You can find my modest findings here on the Lustre wiki
>> > >> > : http://wiki.lustre.org/index.php?title=Drbd_And_Lustre
>> > >> >
>> > >> > Cheers,
>> > >> > Sebastien.
>> > >> >
>> > >> > Mag Gam a écrit :
>> > >> >> Has anyone been using DRBD and Lustre in async mode? I was curious
>> > >> >> what type of speeds you were getting and also what network are you
>> > >> >> using?
>> > >> >>
>> > >> >> TIA
>> > >> >> _______________________________________________
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>> > >>
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>>
>> Cheers, Andreas
>> --
>> Andreas Dilger
>> Sr. Staff Engineer, Lustre Group
>> Sun Microsystems of Canada, Inc.
>>
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>
>
>
> --
> -----------------------------------------------------------------------
> Dipl.-Ing. Heiko Schröter
> Institute of Environmental Physics (IUP)    phone: ++49-(0)421-218-4080
> Institute of Remote Sensing (IFE)           fax:   ++49-(0)421-218-4555
> University of Bremen (FB1)
> P.O. Box 330440               email:  schroete at iup.physik.uni-bremen.de
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-- 
Timh Bergström
System Administrator
Diino AB - www.diino.com
:wq