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[GH-ISSUE #312] Does the concurrent writing of a single file support configuration #191

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opened 2026-10-26 09:46:51 +00:00 by bsakaguchi · 2 comments
bsakaguchi commented 2026-10-26 09:46:51 +00:00
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Originally created by @hhwode on GitHub (Jul 14, 2025).
Original GitHub issue: https://github.com/deepseek-ai/3FS/issues/312

When mounted inside the pod and executing torch.save to save checkpoints, the model size is divided into 5GB each. It appears to be a serial write with only 1 concurrency, which cannot improve speed. Does 3fs not support concurrent writing of individual files.
Testing the zero2 mode 7B model, a total of 120GB took nearly 10 minutes to write.

Originally created by @hhwode on GitHub (Jul 14, 2025). Original GitHub issue: https://github.com/deepseek-ai/3FS/issues/312 When mounted inside the pod and executing torch.save to save checkpoints, the model size is divided into 5GB each. It appears to be a serial write with only 1 concurrency, which cannot improve speed. Does 3fs not support concurrent writing of individual files. Testing the zero2 mode 7B model, a total of 120GB took nearly 10 minutes to write.
bsakaguchi commented 2026-10-26 09:46:53 +00:00
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@SF-Zhou commented on GitHub (Jul 14, 2025):

​​3FS inherently supports concurrent write operations on a single file, but FUSE locks single-file write operations, preventing concurrency. Using usrbio is a feasible solution.​​

<!-- gh-comment-id:3067509659 --> @SF-Zhou commented on GitHub (Jul 14, 2025): ​​3FS inherently supports concurrent write operations on a single file, but FUSE locks single-file write operations, preventing concurrency. Using usrbio is a feasible solution.​​
bsakaguchi commented 2026-10-26 09:46:53 +00:00
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@hhwode commented on GitHub (Jul 14, 2025):

​​3FS inherently supports concurrent write operations on a single file, but FUSE locks single-file write operations, preventing concurrency. Using usrbio is a feasible solution.​​

Thanks, i will try it.

<!-- gh-comment-id:3068365347 --> @hhwode commented on GitHub (Jul 14, 2025): > ​​3FS inherently supports concurrent write operations on a single file, but FUSE locks single-file write operations, preventing concurrency. Using usrbio is a feasible solution.​​ Thanks, i will try it.
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