Marcus Eriksson created CASSANDRA-11106: -------------------------------------------
Summary: Experiment with strategies for picking compaction candidates in LCS Key: CASSANDRA-11106 URL: https://issues.apache.org/jira/browse/CASSANDRA-11106 Project: Cassandra Issue Type: Improvement Reporter: Marcus Eriksson Ideas taken here: http://rocksdb.org/blog/2921/compaction_pri/ Current strategy in LCS is that we keep track of the token that was last compacted and then we start a compaction with the sstable containing the next token (kOldestSmallestSeqFirst in the blog post above) The rocksdb blog post above introduces a few ideas how this could be improved: * pick the 'coldest' sstable (sstable with the oldest max timestamp) - we want to keep the hot data (recently updated) in the lower levels to avoid write amplification * pick the sstable with the highest tombstone ratio, we want to get tombstones to the top level as quickly as possible. -- This message was sent by Atlassian JIRA (v6.3.4#6332)