[Mpi3-ft] Quiescence Interface

[Vinod tipparaju]

Quiecence is certainly a interesting topic, I wasn't able to finish my comments towards the end of the discussion yesterday. One philosophy of a middleware quiecence is to act as a mechanism to tell the middleware to prepare for a recovery, fail if it cannot prepare, and wait until it is told to resume. In the context of a one-sided library by the name ARMCI, a long time ago, I implemented some of the semantics for such a quiecence.  
 
What we were trying to accomplish in general there required a un-coordinated global quiecence. What we were discussing yesterday is certainly more general.
 
Yet, a paper discussing the work is at http://domino.research.ibm.com/comm/research_people.nsf/pages/scarpazza.pubs.html/$FILE/2007-09-17-cluster.pdf 
 
Thanks,
Vinod Tipparaju.> From: jjhursey at open-mpi.org> Date: Wed, 28 Jan 2009 12:13:44 -0500> To: mpi3-ft at lists.mpi-forum.org> Subject: Re: [Mpi3-ft] Quiescence Interface> > Starting discussion on this proposal at the next forum meeting sounds > fine to me. I don't know if we need to devote the whole time to this > proposal, but I can prepare a few things for our discussion. I hope > to have a basic prototype ready by then too.> > I can contact Paul Hargrove (BLCR) to see if he would be interested > in attending this discussion. Since this proposal is a collective > operation, it might be useful to have someone from the collective > working group sit in to make sure the proposal is phrased appropriately.> > Cheers,> Josh> > On Jan 28, 2009, at 10:22 AM, Richard Graham wrote:> > > Josh,> > Thanks for sending this around.> > I would like to schedule a time to start discussion this > > proposal. To do> > so, I think we need to have the impacted parties at the table. > > Since the> > Evergrid (sp) folks and the BLCR folks are in the Bay area, would > > it make> > sense to devote our working group time at the Forum to this > > subject, and> > invite then to attend ? Who else would we want to have participate > > in this> > discussion ?> >> > Thanks,> > Rich> >> >> > On 1/22/09 10:21 AM, "Josh Hursey" <jjhursey at open-mpi.org> wrote:> >> >> I have updated the Quiescence Interface proposal on the wiki:> >> https://svn.mpi-forum.org/trac/mpi-forum-web/wiki/Quiescence> >>> >> I am interested in questions and comments from the group regarding > >> the> >> interface, and use-cases. The primary use-case is for application> >> initiated checkpoint/restart, but the semantics of the proposed API> >> likely also open doors to other use-cases.> >>> >> Let me know what you think.> >>> >> Cheers,> >> Josh> >>> >> _______________________________________________> >> mpi3-ft mailing list> >> mpi3-ft at lists.mpi-forum.org> >> http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi3-ft> >> > _______________________________________________> > mpi3-ft mailing list> > mpi3-ft at lists.mpi-forum.org> > http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi3-ft> > _______________________________________________> mpi3-ft mailing list> mpi3-ft at lists.mpi-forum.org> http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi3-ft
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