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eb4b407085
Split compaction divides the partitions in an existing sstable into two groups and writes them into two new sstables, which replace the original one. The partition count from the original sstable is used as an estimate when writing the new ones, but this estimate is not accurate as the partitions are split between the two new sstables and each will contain only a portion of the original partition count. This also causes the bloom filters to be rebuilt at the end of compaction, as they were initially built with inaccurate estimates. Fix this by using a better estimate for the output sstables based on the token ranges written to them. Fixes scylladb#20253 Signed-off-by: Lakshmi Narayanan Sreethar <lakshmi.sreethar@scylladb.com>