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55bb70a878
" TWCS perform STCS on a window as long as it's the most recent one. From there on, TWCS will compact all files in the past window into a single file. With some moderate write load, it could happen that there's still some compaction activity in that past window, meaning that per-window major may miss some files being currently compacted. As a result, a past window may contain more than 1 file after all compaction activity is done on its behalf, which may increase read amplification. To avoid that, TWCS will now make sure that per-window major is serialized, to make sure no files are missed. Fixes #9553. tests: unit(dev). " * 'fix_twcs_per_window_major_v3' of https://github.com/raphaelsc/scylla: TWCS: Make sure major on past window is done on all its sstables TWCS: remove needless param for STCS options TWCS: kill unused param in newest_bucket() compaction: Implement strategy control and wire it compaction: Add interface to control strategy behavior.