storage: book keep dirty_ratio in disk_log_impl
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WillemKauf
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WillemKauf
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Dec 23, 2024
CI test resultstest results on build#60092
test results on build#60241
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Adds the book-keeping variables `_dirty/closed_segment_bytes` to `disk_log_impl`, as well as some getter/setter functions. These functions will be used throughout `disk_log_impl` where required (segment rolling, compaction, segment eviction) to track the bytes contained in dirty and closed segments.
Uses the added functions `update_dirty/closed_segment_bytes()` in the required locations within `disk_log_impl` in order to bookkeep the dirty ratio. Bytes can be either removed or added by rolling new segments, compaction, and retention enforcement.
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Retry command for Build#60241please wait until all jobs are finished before running the slash command |
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The dirty ratio of a log is defined as the ratio between the number of bytes in "dirty" segments and the total number of bytes in closed segments.
Dirty segments are closed segments which have not yet been cleanly compacted- i.e, duplicates for keys in this segment could be found in the prefix of the log up to this segment.
Add book-keeping to
disk_log_implin order to cache both_dirty_segment_bytesas well as_closed_segment_bytes, which allows us to calculate the dirty ratio, and add observability for it instorage::probe.In the future, this could be used in combination with a compaction configuration a la min.cleanable.dirty.ratio to schedule compaction.
Backports Required
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Improvements
dirty_segment_bytesandclosed_segment_bytesto the storage layer.