[Lustre-discuss] drbd async mode

[Mag Gam]

Heiko:

I am interested in the doc too.

Its worth while to update the Wiki


On Tue, Sep 23, 2008 at 4:57 AM, Andreas Dilger <adilger at sun.com> wrote:
> On Sep 22, 2008  11:19 +0200, Heiko Schroeter wrote:
>> 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.
>
> It would definitely be useful to update (at least) the Lustre DRBD wiki
> page to indicate you are using this successfully, and any configuration
> DRBD options you are using.  Similarly, if the Lustre manual is missing
> any information (or possibly a specific example) of how to use HA for
> Lustre that would also be useful.
>
>> > 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
>> > > >> >> _______________________________________________
>> > > >> >> Lustre-discuss mailing list
>> > > >> >> Lustre-disc... at lists.lustre.org
>> > > >> >>http://lists.lustre.org/mailman/listinfo/lustre-discuss
>> > > >>
>> > > >> _______________________________________________
>> > > >> Lustre-discuss mailing list
>> > > >> Lustre-disc... at lists.lustre.orghttp://lists.lustre.org/mailman/listinf
>> > > >>o/lustre-discuss
>> > > >
>> > > > _______________________________________________
>> > > > Lustre-discuss mailing list
>> > > > Lustre-discuss at lists.lustre.org
>> > > > http://lists.lustre.org/mailman/listinfo/lustre-discuss
>> > >
>> > > _______________________________________________
>> > > Lustre-discuss mailing list
>> > > Lustre-discuss at lists.lustre.org
>> > > http://lists.lustre.org/mailman/listinfo/lustre-discuss
>> >
>> > Cheers, Andreas
>> > --
>> > Andreas Dilger
>> > Sr. Staff Engineer, Lustre Group
>> > Sun Microsystems of Canada, Inc.
>> >
>> > _______________________________________________
>> > Lustre-discuss mailing list
>> > Lustre-discuss at lists.lustre.org
>> > http://lists.lustre.org/mailman/listinfo/lustre-discuss
>>
>>
>>
>> --
>> -----------------------------------------------------------------------
>> 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
>> Otto-Hahn-Allee 1
>> 28359 Bremen
>> Germany
>> -----------------------------------------------------------------------
>
> Cheers, Andreas
> --
> Andreas Dilger
> Sr. Staff Engineer, Lustre Group
> Sun Microsystems of Canada, Inc.
>
>