riyaverm-db opened a new pull request, #47393:
URL: https://github.com/apache/spark/pull/47393
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### What changes were proposed in this pull request?
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Currently, during the state store maintenance process, we find which old
version files of the RocksDB state store to delete by listing all existing
snapshotted version files in the checkpoint directory every 1 minute by
default. The frequent list calls in the cloud can result in high costs. To
address this concern and reduce the cost associated with state store
maintenance, we should aim to minimize the frequency of listing object stores
inside the maintenance task. To minimize the frequency, we will try to
accumulate versions to delete and only call list when the number of versions to
delete reaches a configured threshold.
The changes include:
1. Adding new configuration variable `minVersionsToDelete`
2. Using estimated values of `minVersion` and `maxVersion` variables in
**RocksDBFileManager** to ensure number of files to be deleted in a call to
**deleteOldVersions** is at least the value of `minVersionsToDelete`
### Why are the changes needed?
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Currently, maintenance operations like snapshotting, purging, deletion, and
file management is done asynchronously for each data partition. We want to
shift away periodic deletion and instead rely on number of files in the
checkpoint directory to reduce list calls and introduce batch deletion.
### Does this PR introduce _any_ user-facing change?
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No.
### How was this patch tested?
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Added unit tests.
### Was this patch authored or co-authored using generative AI tooling?
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No.
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