Hi all since we upgraded half of our Cassandra cluster to 2.0.0 and we use LCS, we hit CASSANDRA-6284 bug. So basically all data in sstables created after the upgrade are wrongly (non-uniformly within compaction levels) distributed. This causes a huge overhead when compacting new sstables (see the bug for the details).
After applying the patch, the distribution of the data within a level is supposed to recover itself over time but we would like to not to wait a month or so until it gets better. So the question. What is the best way to recompact all the sstables so the data in one sstables within a level would contain more or less the right portion of the data, in other worlds, keys would be uniformly distributed across sstables within a level? (e.g.: assumming total token range for a node 1..10000, and given that L2 should contain 100 sstables, , all sstables within L2 should cover a range of ~100 tokens). Based on documentation, I can only think of switching to SizeTiered compaction, doing major compaction and then switching back to LCS. Thanks in advance Jiri Horky
