Hi all, I have a question about ticket https://issues.apache.org/jira/browse/CASSANDRA-3442
Why does Cassandra single table compaction skips the keys that are in the other sstables? Please correct if I am wrong. I also dont understand why we have this line in worthDroppingTombstones method: double remainingColumnsRatio = ((double) columns) / (sstable. getEstimatedColumnCount<http://grepcode.com/file/repo1.maven.org/maven2/org.apache.cassandra/cassandra-all/1.2.2/org/apache/cassandra/io/sstable/SSTableReader.java#SSTableReader.getEstimatedColumnCount%28%29> ().count<http://grepcode.com/file/repo1.maven.org/maven2/org.apache.cassandra/cassandra-all/1.2.2/org/apache/cassandra/utils/EstimatedHistogram.java#EstimatedHistogram.count%28%29> () * sstable.getEstimatedColumnCount<http://grepcode.com/file/repo1.maven.org/maven2/org.apache.cassandra/cassandra-all/1.2.2/org/apache/cassandra/io/sstable/SSTableReader.java#SSTableReader.getEstimatedColumnCount%28%29> ().mean<http://grepcode.com/file/repo1.maven.org/maven2/org.apache.cassandra/cassandra-all/1.2.2/org/apache/cassandra/utils/EstimatedHistogram.java#EstimatedHistogram.mean%28%29> ()); remainingColumnsRatio is always *0 *in my case and the droppableRatio is *0.9. Cassandra skips all sstables which are already expired.* This line was introduced by https://issues.apache.org/jira/browse/CASSANDRA-4022. Best Regards, Cem
