I have 2.2.1 Cassandra node that does not appear to be compacting SSTables. The table is currently configured with STCS. I turned on some debug logging and when the compaction checks run, they log:
Compaction buckets are [] I have been going over SizeTieredCompactionStrategy.java and looking in particular at the getNextBackgroundTables method since that is where the above message is logged. Assuming I am reading the logs correctly, what if anything besides all SSTables being blacklisted would result in empty buckets? As I understand the code if an SSTable falls outside the threshold of all existing buckets, it will be added to a new bucket. - John
