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Enhance gf checkpointing: faster MPIO writing, checkpoint file backup, and code refinement #82

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  • Move gf_checkpoint to a dedicated section in toml
  • Use MPIO for writing gf checkpoint file, make it much faster
  • Back-up gf checkpoint file to avoid data loss in case of job failure.
  • Reduce duplicated code in gf_checkpointing routines, and reintroduce time left information.

(moved out of #72 for readability)

@Thomas-Ulrich Thomas-Ulrich mentioned this pull request Oct 25, 2024
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