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f4706c7050
"This patchset introduces leveled compaction to Scylla. We don't handle all corner cases yet, but we already have the strategy and compaction working as expected. Test cases were written and I also tested the stability with a load of cassandra-stress. Leveled compaction may output more than one sstable because there is a limit on the size of sstables. 160M by default. Related to handling of partial compaction, it's still something to be worked on. Anyway, it will not be a big problem. Why? Suppose that a leveled compaction will generate 2 sstables, and scylla is interrupted after the first sstable is completely written but before the second one is completely written. The next boot will delete the second sstable, because it was partially written, but will not do anything with the first one as it was completely written. As a result, we will have two sstables with redundant data."