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List:       ci-linux-devel
Subject:    [CI] Re: [Dlm-devel] Compaq Cluster Manager & DLM
From:       "David B. Zafman" <david.zafman () compaq ! com>
Date:       2001-06-13 22:17:07
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Sorry for the long delay.  We have our open source web page working.  You can find
the CLMS/ICS sourceforge style set-up at http://opensource.compaq.com under
"Cluster Infrastructure for Linux."  I've been trying to find good design specs,
but they all need editing first.

Just this week we moved the initialization of CLMS/ICS out of the early kernel
initialization, and into system calls.  Now we can initialize the cluster from
linuxrc of the ramdisk or much later for loosely coupled clusters.  I'm going to
try to combine our initialization with GFS mounting of a shared root with external
lock manager from the ramdisk.  I assume that mapping still doesn't work, so I'll
have to come up to single-user.

If you have any questions about what you find on our web site, be the first to
send to the mailing list.    We are officially announcing our web page(s) next
week.

Peter Badovinatz wrote:

> --- "David B. Zafman" <david.zafman@compaq.com> wrote:
> >
> > My group is about to open source our Cluster Manager code.  I would like to
> > discuss with you guys the prospects of utilizing it for your DLM project.  We
> > believe that is has the features which are relied upon from its HACMP roots.
> > I
> > haven't seen much mail this month, so I was worried that lots of development
> > was
> > occuring based on working around the lack of a real cluster manager.
>
> David,
>
> We're quite interested in working with you.  I have meant to contact you, but
> we've been in some amount of flux.  We have been violating the release early
> and often rule :(  In any case, we have not yet done lots of development
> directly related to lack of a cluster manager although we have done a fair
> amount of worrying and some head scratching.  More worringly, we've had some
> basic structural issues (internal state machine) that we needed to clean up.
> Actually, that Ian is cleaning up, as I've been yo-yoing among many different
> things.  Lab transitions, issues with our test rack (did you know the 2.4
> kernel will NOT load from CD onto a Netfinity 5500?  And that is our test
> cluster!)
>
> Ok, anyway, this sounds like great news. We've attempted to restructure the DLM
> code so that we can 'plug into' different cluster managers.  We've successfully
> done two so far, Heartbeat and IBM's (still proprietary) RSCT.  The latter
> isn't really a useful option for us in most situations because it's closed
> (although, like Compaq's code, it provides a "real" cluster manager.)
>
> We're hoping to get the wheels driving again, you should see some API spec
> updates from me being posted here soon (nothing really tied to cluster manager
> issues, but, necessary for users like GFS), and Ian should have his updates out
> ASAP if the lab machines are back in business.
>
> I am in Sydney, Australia until 25 June, but am otherwise attempting to work
> 'normally.'  Such as is normal for me anyway...  If you can point me docs (for
> now, code when it's available) that describe the APIs (or the semantics) the
> DLM would use to hook in, I can see how it fits into the framework we have so
> far.  I am not closely familiar with your code, but from what I do know, I
> think it will do us quite well!  Do you have a specific time frame for
> availability?
>
> Thanks for the great news!  We'll add it to the arsenal.
>
> >
> > --
> > David B. Zafman                             | Compaq Computer Corporation
> > mailto:david.zafman@compaq.com | http://www.compaq.com
> > "Thus spake the master programmer:  When you have learned to snatch
> > the error code from the trap frame, it will be time for you to leave."
> >
>
> Peter
>
> =====
> These have been the opinions of:
> Peter R. Badovinatz -- (503)578-5530 (TL 775)
> wombat@us.ibm.com/tabmowzo@yahoo.com
> and in no way should be construed as official opinion of
> IBM, Corp.
>
> __________________________________________________
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--
David B. Zafman                             | Compaq Computer Corporation
mailto:david.zafman@compaq.com | http://www.compaq.com
"Thus spake the master programmer:  When you have learned to snatch
the error code from the trap frame, it will be time for you to leave."

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