Hi All, I changed STCS to TWCS months ago and left some old sstable files. Some are almost tombstones. To release disk space, I issued compaction command on one file by JMX. After the compaction is done, I got one new file with almost the same size of the old one. Seems no tombstones are cleaned during the compaction.
Before compaciton: Max: 01/12/2017 Min: 11/25/2016 Estimated droppable tombstones: 0.9115440366604225 53G Jan 16 00:36 lb-124337-big-Data.db After compaction: Max: 01/12/2017 Min: 11/25/2016 Estimated droppable tombstones: 0.9114708007586322 53G Mar 27 00:17 lb-143951-big-Data.db Questions: 1. Why the compaction didn't clean the tombstones? 2. If one file are all tombstones and I want to it manually(including data, index, filter, etc), do I need to shutdown the node? Cheers, -Simon
