Compression stats and commitlog compression function#4708
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Compression stats and commitlog compression function#4708
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Namely, bytes in + bytes out. Apart from metrics, we want to use this for throttling I/O when necessary.
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Adds a way to pass a "closure" when compressing a commitlog segment, such that the source and destination are polymorphic. This allows to have them wrapped externally, which is used to apply bandwidth limiting where necessary.
Also return bytes in + bytes out stats from the compressor.
Expected complexity level and risk
1
Testing
Elsewhere.