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Subject: Re: Assertions running Cleanup on a 3-node cluster with Cassandra
 1.1.4 and LCS
From: Janne Jalkanen <janne.jalkanen@ecyrd.com>
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Date: Wed, 12 Sep 2012 10:38:16 +0300
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To: user@cassandra.apache.org


On 12 Sep 2012, at 00:50, Omid Aladini wrote:

> On Tue, Sep 11, 2012 at 8:33 PM, Janne Jalkanen
> <janne.jalkanen@ecyrd.com> wrote:
>> 
>> 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.
> 
> That's true. "Unsafe" in the sense that your data might not be in the
> right shape with respect to order of keys in sstables and LCS's
> properties and you might need to offline-scrub when you upgrade to the
> latest 1.1.x.

OK, so what's the worst case here? Data loss? Bad performance?

> The fix was released on 1.1.3 (LCS fix) and 1.1.4 (offline scrub) and
> I agree it would be helpful to have it on NEWS.txt.

I'll file a bug on this, unless someone can get to it first :)

/Janne