Editing Application checkpointing (section)

=== Collaborative checkpointing ===
Some recent protocols perform collaborative checkpointing by storing fragments of the checkpoint in nearby nodes.<ref>{{Cite journal|last1=Walters|first1=J. P.|last2=Chaudhary|first2=V.|date=2009-07-01|title=Replication-Based Fault Tolerance for MPI Applications|journal=IEEE Transactions on Parallel and Distributed Systems|volume=20|issue=7|pages=997–1010|doi=10.1109/TPDS.2008.172|issn=1045-9219|citeseerx=10.1.1.921.6773|s2cid=2086958}}</ref> This is helpful because it avoids the cost of storing to a parallel file system (which often becomes a bottleneck for large-scale systems) and it uses storage that is closer.{{cn|date=January 2024}} This has found use particularly in large-scale supercomputing clusters. The challenge is to ensure that when the checkpoint is needed when recovering from a failure, the nearby nodes with fragments of the checkpoints are available.{{cn|date=January 2024}}