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From Janne Jalkanen <>
Subject Re: Assertions running Cleanup on a 3-node cluster with Cassandra 1.1.4 and LCS
Date Tue, 11 Sep 2012 18:33:42 GMT

> A bug in Cassandra 1.1.2 and earlier could cause out-of-order sstables
> and inter-level overlaps in CFs with Leveled Compaction. Your sstables
> generated with 1.1.3 and later should not have this issue [1] [2].

Does this mean that LCS on 1.0.x should be considered unsafe to use? I'm using them for semi-wide
frequently-updated CounterColumns and they're performing much better on LCS than on STCS.

> In case you have old Leveled-compacted sstables (generated with 1.1.2
> or earlier. including 1.0.x) you need to run offline scrub using
> Cassandra 1.1.4 or later via /bin/sstablescrub command so it'll fix
> out-of-order sstables and inter-level overlaps caused by previous
> versions of LCS. You need to take nodes down in order to run offline
> scrub.

The  1.1.5 README does not mention this. Should it?


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