littlexyw opened a new pull request, #2444:
URL: https://github.com/apache/celeborn/pull/2444
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### What changes were proposed in this pull request?
An option to disable fallback is provided.
### Why are the changes needed?
It's dangerous to fallback to external shuffle when applications run on both
online and offline nodes because online services could be impacted due to a
shortage of disk capacity.
### Does this PR introduce _any_ user-facing change?
### How was this patch tested?
manual test
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