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From Omid Aladini <>
Subject Re: Assertions running Cleanup on a 3-node cluster with Cassandra 1.1.4 and LCS
Date Tue, 11 Sep 2012 13:45:11 GMT
Could you, as Aaron suggested, open a ticket?

-- Omid

On Tue, Sep 11, 2012 at 2:35 PM, Rudolf van der Leeden
<> wrote:
>> Which version of Cassandra has your data been created initially with?
>> 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].
>> 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 data was orginally created on a 1.1.2 cluster with STCS (i.e. NOT
> leveled compaction).
> After the upgrade to 1.1.4 we changed from STCS to LCS w/o problems.
> Then we ran more tests and created more and very big keys with millions of
> columns.
> The assertion only shows up with one particular CF containing these big
> keys.
> So, from your explanation, I don't think an offline scrub will help.
> Thanks,
> -Rudolf.

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