Re: OpenMPI and BLCR 0.8.0b2

From: Josh Hursey (
Date: Sun Dec 07 2008 - 07:02:25 PST

  • Next message: Paul H. Hargrove: "Re: OpenMPI and BLCR 0.8.0b2"
    This patch will definitely be included in the Open MPI v1.3 series.  
    Depending on when the group decides to release and when I get a  
    chance to create the patch it may not make it for v1.3.0. Open MPI  
    has a configure check for cr_request_file, and it 'should' default to  
    fork/exec cr_checkpoint if it does not find the interface ('should'  
    meaning that I haven't tested this in a long time, but the code is  
    still in place). So I believe that 0.8.0 should work fine with Open  
    MPI, if not slightly non-optimal.
    With that in mind I would continue with removing the cr_request_file  
    interface in 0.8.0 as you had planned and I'll try to get a patch  
    into the Open MPI v1.3 series as quickly as I can.
    Thanks for the offer.
    On Dec 4, 2008, at 3:13 PM, Paul H. Hargrove wrote:
    > Josh,
    >  I see the trac item lists 1.3 as the Milestone for this fix.  Is  
    > it realistic to think that this (hopefully small) change to OMPI  
    > will make it into 1.3?  If not, I can probably resurect the removed  
    > APIs and delay removal until 0.8.1, though I'd rather not if this  
    > can be avoided.
    > -Paul
    > Josh Hursey wrote:
    >> I responded on the Open MPI mailing list regarding this, but  
    >> wanted to repost here in case anyone is interested in tracking the  
    >> progress of this Open MPI C/R bug.
    >> Thanks for the bug report,
    >> Josh
    >> On Dec 4, 2008, at 4:39 AM, Matthias Hovestadt wrote:
    >>> Hi!
    >>> Just for your information: the checkpointing support of
    >>> OpenMPI makes use of the deprecated function cr_request_file.
    >>> Since you removed support for these deprecated functions in
    >>> 0.8.0, the usage of older versions like 0.7.3 is mandatory if
    >>> if checkpointing OpenMPI jobs.
    >>> Best,
    >>> Matthias
    > -- 
    > Paul H. Hargrove                          PHHargrove_at_lbl_dot_gov
    > Future Technologies Group
    > HPC Research Department                   Tel: +1-510-495-2352
    > Lawrence Berkeley National Laboratory     Fax: +1-510-486-6900

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