[Checkpoint] Fix symlink issue where symlink file uploaded before checkpoint files upload #3376
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… into checkpoint_saver
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b-chu
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eracah
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This PR introduces a lot of code debt by copying and pasting a lot of the logic from remote_uploader into checkpoint_saver with the only difference being that the files being uploaded are symlinks. Since remote symlinks are just text files we need to find a way to upload symlinks using the remote_uploader before we can merge this in.
eracah
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Co-authored-by: Evan Racah <[email protected]>
eracah
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…ckpoint files upload (mosaicml#3376) * a * a * a * a * a * a * a * a * fix test * a * a * a * a * fix unit test * a * a * a * a * a * fix 2gpu unit test * a * a * a * a * fix doctest * a * fix test and lint * up * a * a * a * a * a * a * a * a * address comments * a * a * a * a * rerun test * add logging * remove debug comments * comments * a * cleanup * a * linter * lint * Update composer/callbacks/checkpoint_saver.py Co-authored-by: Evan Racah <[email protected]> * commenst * a * fix test * fix test * comments * a --------- Co-authored-by: Evan Racah <[email protected]>
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…ckpoint files upload (#3376) * a * a * a * a * a * a * a * a * fix test * a * a * a * a * fix unit test * a * a * a * a * a * fix 2gpu unit test * a * a * a * a * fix doctest * a * fix test and lint * up * a * a * a * a * a * a * a * a * address comments * a * a * a * a * rerun test * add logging * remove debug comments * comments * a * cleanup * a * linter * lint * Update composer/callbacks/checkpoint_saver.py Co-authored-by: Evan Racah <[email protected]> * commenst * a * fix test * fix test * comments * a --------- Co-authored-by: Evan Racah <[email protected]>
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What does this PR do?
Fix the symlink issues.
How?
[updated]: in the checkpoint saver, on rank-0 which saves the symlink, it all_gather the remote checkpoint file names, and start a new process to check if those remote files finish uploading by calling
object_store.get_object_size. It only upload symlink file once all the remote file finish uploading. This way:Unit test
Integration test
2-nodes OCI:
save: test-uploader-0Tkv9O
autoresume: test-uploader-yac88U
2-nodes mflow:
save: l38bi-full-sweep-train-bb-1-0e-6-5-VMY2Xo
load: l38bi-full-sweep-train-bb-1-0e-6-5-TyRcPi
Daily test:
https://github.com/mosaicml/composer/actions/runs/9700144963
composer regression test:
https://github.com/databricks-mosaic/regression-testing/actions/runs/9700161085
Perf test (100 batches with 9 batch save interval. The training time varies because of unstable uploading speed, but just want to make sure test didn't regress training time)
64 gpu test: 77b-bs1024-g512-res2-f60-37gSXK time: 26 minutes
64 GPU baseline: 77b-bs1024-g512-res2-f60-2VZPxB time: more than 40 minutes because rank 29 uploading delay
In case 1 rank upload fails, it won't hang:
test-uploader-MXcoEp