Mike, I was not on the last teleconf so this might have been covered there, but just to make sure I understand the later two proposals you sent. You are not proposing any MPI interfaces for checkpoint/restart, but just describing how you implemented a transparent solution inside or below an MPI implementation. Is that correct? -- Josh On Jun 5, 2008, at 5:44 PM, Mike Heffner wrote:

[3rd try around, mailing list bounce]

All,

Attached are the documents I promised during the previous conference call.

The IPDPS 2007 paper gives a technical description of the Availability Services product (known academically as "DejaVu") including the online logging algorithm used for BSD socket applications. It also includes some performance numbers from previous experiments with our RDMA MVAPICH implementation.

The avs_mpi_integration.pdf document provides a brief description of the interfaces that were required to integrate a userlevel CP/R framework with MVAPICH/RDMA. This provides an insight into what we required to integrate with a real-world RDMA MPI stack to provide CP/ R with very little overhead.

The third document is one I wrote this afternoon to propose an asynchronous, quiescence interface. It is similar to Joshua's proposal on the wiki, but provides an asynchronous, driver-level version that our solution requires for application transparency.

I will try to get some of these onto the wiki as well.

Cheers,

Mike

--

Mike Heffner <[email protected]> EverGrid Software Blacksburg, VA USA

Voice: (540) 443-3500 x603 < ipdps07 .pdf

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< avs_mpi_integration .pdf

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