[resend] Greg Bronevetsky wrote:

...

Application-directed C/R will still require some quiescence hooks from the MPI layer (ex: asyncronous progression by the MPI layer). There was some discussion on this.

What kind of quiscence are you thinking of? It seems to me that applications will simply need to ensure that either no messages are in-flight at the time of the checkpoint or that all such messages have been logged appropriately by the application.

In an application-directed C/R system that would be the ideal MPI quiescence. Mike -- Mike Heffner <[email protected]> Librato, Inc. Blacksburg, VA USA Voice: (540) 443-3500 #603