Mailing List Archive: Linux-HA: Dev

DRBD+ in pacemaker?

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misch at multinet

Nov 21, 2008, 1:50 AM

Post #1 of 7 (2118 views)
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DRBD+ in pacemaker?

Hi,

this week there was the announcement about a GPL version of DRBD+, which means
3 partitions in one DRBD. How is this integrated into pacemaker? Multistate
resource running 3 times in the cluster?

Any experiences?

Thanks.
--
Dr. Michael Schwartzkopff
MultiNET Services GmbH
Addresse: Bretonischer Ring 7; 85630 Grasbrunn; Germany
Tel: +49 - 89 - 45 69 11 0
Fax: +49 - 89 - 45 69 11 21
mob: +49 - 174 - 343 28 75

mail: misch [at] multinet
web: www.multinet.de

Sitz der Gesellschaft: 85630 Grasbrunn
Registergericht: Amtsgericht München HRB 114375
Geschäftsführer: Günter Jurgeneit, Hubert Martens

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mm at yuhu

Nov 21, 2008, 2:19 AM

Post #2 of 7 (2039 views)
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Re: DRBD+ in pacemaker? [In reply to]

On Friday 21 November 2008 11:50:50 Michael Schwartzkopff wrote:
> Hi,
>
> this week there was the announcement about a GPL version of DRBD+, which
> means 3 partitions in one DRBD. How is this integrated into pacemaker?
> Multistate resource running 3 times in the cluster?
>
> Any experiences?
>
> Thanks.

Maybe clones with constraints and rules?

Marian

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r.bhatia at ipax

Nov 21, 2008, 2:45 AM

Post #3 of 7 (2040 views)
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Re: DRBD+ in pacemaker? [In reply to]

Michael Schwartzkopff wrote:
> this week there was the announcement about a GPL version of DRBD+, which means
> 3 partitions in one DRBD. How is this integrated into pacemaker? Multistate
> resource running 3 times in the cluster?

as i have never tried the drbd+ version, i do not know. lets wait and
see how /proc/drbd etc. looks like ;)

cheers,
raoul
--
____________________________________________________________________
DI (FH) Raoul Bhatia M.Sc. email. r.bhatia [at] ipax
Technischer Leiter

IPAX - Aloy Bhatia Hava OEG web. http://www.ipax.at
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1190 Wien tel. +43 1 3670030
FN 277995t HG Wien fax. +43 1 3670030 15
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florian.haas at linbit

Nov 21, 2008, 5:46 AM

Post #4 of 7 (2032 views)
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Re: DRBD+ in pacemaker? [In reply to]

On 2008-11-21 10:50, Michael Schwartzkopff wrote:
> Hi,
>
> this week there was the announcement about a GPL version of DRBD+, which means
> 3 partitions in one DRBD. How is this integrated into pacemaker? Multistate
> resource running 3 times in the cluster?

You got that one wrong. Not "3 partitions in one DRBD". Instead, stacked
DRBD devices which may span 3 or 4 nodes. And yes, this would need to be
integrated into the DRBD RA in some shape or form.

And, just to clarify, there will not be any GPL version of DRBD+.
Instead, those features that are currently available only in DRBD+ are
to be merged into the main GPL DRBD code base and released as part of
DRBD 8.3.

Cheers,
Florian

--
: Florian G. Haas
: LINBIT Information Technologies GmbH
: Vivenotgasse 48, A-1120 Vienna, Austria

DRBD® and LINBIT® are registered trademarks of LINBIT.
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misch at multinet

Nov 21, 2008, 6:16 AM

Post #5 of 7 (2023 views)
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Re: DRBD+ in pacemaker? [In reply to]

Am Freitag, 21. November 2008 14:46 schrieb Florian Haas:
> On 2008-11-21 10:50, Michael Schwartzkopff wrote:
> > Hi,
> >
> > this week there was the announcement about a GPL version of DRBD+, which
> > means 3 partitions in one DRBD. How is this integrated into pacemaker?
> > Multistate resource running 3 times in the cluster?
>
> You got that one wrong. Not "3 partitions in one DRBD". Instead, stacked
> DRBD devices which may span 3 or 4 nodes. And yes, this would need to be
> integrated into the DRBD RA in some shape or form.
>
> And, just to clarify, there will not be any GPL version of DRBD+.
> Instead, those features that are currently available only in DRBD+ are
> to be merged into the main GPL DRBD code base and released as part of
> DRBD 8.3.
>
> Cheers,
> Florian

Thanks for the clarification. From the announcement I understood the
techniques, but perhaps my question was misleading. Anyway: Any activities to
integrate these features into the OCF DRBD resource agent?

Greetings,
--
Dr. Michael Schwartzkopff
MultiNET Services GmbH
Addresse: Bretonischer Ring 7; 85630 Grasbrunn; Germany
Tel: +49 - 89 - 45 69 11 0
Fax: +49 - 89 - 45 69 11 21
mob: +49 - 174 - 343 28 75

mail: misch [at] multinet
web: www.multinet.de

Sitz der Gesellschaft: 85630 Grasbrunn
Registergericht: Amtsgericht München HRB 114375
Geschäftsführer: Günter Jurgeneit, Hubert Martens

---

PGP Fingerprint: F919 3919 FF12 ED5A 2801 DEA6 AA77 57A4 EDD8 979B
Skype: misch42
_______________________________________________________
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lmb at suse

Nov 21, 2008, 9:30 AM

Post #6 of 7 (2015 views)
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Re: DRBD+ in pacemaker? [In reply to]

On 2008-11-21T15:16:32, Michael Schwartzkopff <misch [at] multinet> wrote:

> Thanks for the clarification. From the announcement I understood the
> techniques, but perhaps my question was misleading. Anyway: Any activities to
> integrate these features into the OCF DRBD resource agent?

Stacked devices don't really require a lot of integration: you collocate
the top-level one with the master role of the one below.

The RA doesn't even have to know, per se, at least not by what Florian
described.

Regards,
Lars

--
Teamlead Kernel, SuSE Labs, Research and Development
SUSE LINUX Products GmbH, GF: Markus Rex, HRB 16746 (AG Nürnberg)
"Experience is the name everyone gives to their mistakes." -- Oscar Wilde

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florian.haas at linbit

Nov 25, 2008, 2:14 PM

Post #7 of 7 (1969 views)
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Re: DRBD+ in pacemaker? [In reply to]

On 11/21/2008 06:30 PM, Lars Marowsky-Bree wrote:
> On 2008-11-21T15:16:32, Michael Schwartzkopff <misch [at] multinet> wrote:
>
>> Thanks for the clarification. From the announcement I understood the
>> techniques, but perhaps my question was misleading. Anyway: Any activities to
>> integrate these features into the OCF DRBD resource agent?
>
> Stacked devices don't really require a lot of integration: you collocate
> the top-level one with the master role of the one below.
>
> The RA doesn't even have to know, per se, at least not by what Florian
> described.

In fact it does, as we do need to add an additional flag when invoking
drbdadm for stacked resources. But that looks rather trivial. FLW... :-)

Cheers,
Florian

--
: Florian G. Haas
: LINBIT Information Technologies GmbH
: Vivenotgasse 48, A-1120 Vienna, Austria

LINBIT® and DRBD® are registered trademarks of LINBIT.
_______________________________________________________
Linux-HA-Dev: Linux-HA-Dev [at] lists
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Home Page: http://linux-ha.org/

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