> What are the proper compaction settings for the hints CF? Mine are:
> compaction={'min_threshold': '0', 'class':
> 'SizeTieredCompactionStrategy', 'max_threshold': '0'}
Compaction is run manually by the code when it finishes delivering hints.
> Is hints compaction a common problem? What are steps to remedy?
Any errors in the logs ?
Are there many -tmp- files in the hint's dir ?
Is your cluster having problems with flapping nodes or dropped messages that
result in a lot of hint storage?
You could use nodetool to stop the compaction tasks then run a major compaction
on the Hints CF.
Cheers
-----------------
Aaron Morton
Freelance Cassandra Consultant
New Zealand
@aaronmorton
http://www.thelastpickle.com
On 2/04/2013, at 3:30 AM, Dane Miller <d...@optimalsocial.com> wrote:
> Hi,
>
> Several of my nodes have been compacting system.hints for over 24
> hours with no progress, causing high load on otherwise idle nodes.
> I'm seeing 30-50 Data.db files in system/hints/
>
> What are the proper compaction settings for the hints CF? Mine are:
> compaction={'min_threshold': '0', 'class':
> 'SizeTieredCompactionStrategy', 'max_threshold': '0'}
>
> Is hints compaction a common problem? What are steps to remedy?
>
> Thanks!
>
> Dane
