Add simple and distributed checkpointing and automatic recovery #144
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At each distributed checkpointing, all processes run MPI gather and MPI bcast to share common set of iteration numbers that has corresponding snapshot. Also at startup it runs syncing among procceses, if _DistCPRExtension.maybe_resume() is explicitly called. Limitations * Number of nodes must be the same among runs * In resuming all processes must reachable to its own snapshot files that has corresponding rank numbers * Needs manual operation when any latest set of files are broken; just remove them and use one more older set Signed-off-by: UENISHI Kota <[email protected]>
keisukefukuda
approved these changes
Dec 7, 2017
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At each distributed checkpointing, all processes run MPI gather and
MPI bcast to share common set of iteration numbers that has
corresponding snapshot. Also at startup it runs syncing among
procceses, if _DistCPRExtension.maybe_resume() is explicitly called.
Limitations
that has corresponding rank numbers
just remove them and use one more older set