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From Ben Coverston <ben.covers...@datastax.com>
Subject Re: persistent compaction issue (1.1.4 and 1.1.5)
Date Tue, 18 Sep 2012 16:27:52 GMT
In your data directory there should be a .json file for each column family
that holds the manifest.

Do any of those indicate that you have a large number of SSTables in L0?

This number is also indicated in JMX by the UnLeveledSSTables count for
each column family.

If not it's possible that the number is coming from SSTable fragments that
are the result of a repair/decommission.



On Tue, Sep 18, 2012 at 8:57 AM, Michael Kjellman
<mkjellman@barracuda.com>wrote:

> Leveled. nothing in the logs. Normal compactions seem to be
> occurring...these ones just won't go away.
>
> I've tried a rolling restart and literally tries killing our entire
> cluster and bringing up one node at a time in case gossip was causing this.
> Same result.
>
> The compactions are there immediately after Thrift starts listening for
> clients.
>
> Thanks Aaron
>
> On Sep 18, 2012, at 3:54 AM, "aaron morton" <aaron@thelastpickle.com
> <mailto:aaron@thelastpickle.com>> wrote:
>
> What Compaction Strategy are you using ?
> Are there any errors in the logs ?
> If you restart a node how long does it take for the numbers to start to
> rise ?
>
> Cheers
>
>
> -----------------
> Aaron Morton
> Freelance Developer
> @aaronmorton
> http://www.thelastpickle.com
>
> On 18/09/2012, at 7:39 AM, Michael Kjellman <mkjellman@barracuda.com
> <mailto:mkjellman@barracuda.com>> wrote:
>
> Hi All,
>
> I have an issue where each one of my nodes (currently all running at
> 1.1.5) is reporting around 30,000 pending compactions. I understand that a
> pending compaction doesn't necessarily mean it is a scheduled task however
> I'm confused why this behavior is occurring. It is the same on all nodes,
> occasionally goes down 5k pending compaction tasks, and then returns to
> 25,000-35,000 compaction tasks pending.
>
> I have tried a repair operation/scrub operation on two of the nodes and
> while compactions initially happen the number of pending compactions does
> not decrease.
>
> Any ideas? Thanks for your time.
>
> Best,
> michael
>
>
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-- 
Ben Coverston
DataStax -- The Apache Cassandra Company

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