Here's my quick writeup of the major problems that we discussed with writing modular apps on top of our proposed MPI fault tolerance spec and an approach for making it relatively easy to write module-specific error recovery algorithms without worrying about other modules. I've attached a pdf version as well as a txt version that will be easier to edit. Greg Bronevetsky Post-Doctoral Researcher 1028 Building 451 Lawrence Livermore National Lab (925) 424-5756 [email protected] At 06:58 PM 1/13/2009, Richard Graham wrote:

OK, we will resume the calls next week, 1/21/2009.

Rich

On 1/13/09 11:42 AM, "Greg Bronevetsky" <[email protected]> wrote:

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Unfortunately, for reasons out of [my] control, I did not manage to get the time to update the wiki and I doubt I will find any time before the call tomorrow. I'll have time to get back to this starting from tomorrow morning.

I second your idea to cancel the call tomorrow.

I have a protocol worked out to do micro-rollbacks that will work well if we add to the API some kind of asynchronous event notification mechanism like active messages. It will work not as well without the extension. I'll update George's document once its posted so that we have a unified document that describes the problem and the proposed solutions.

Greg Bronevetsky Post-Doctoral Researcher 1028 Building 451 Lawrence Livermore National Lab (925) 424-5756 [email protected]

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