delete performance

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Any thoughts on how to improve the delete process performance?

thanks,

On Mon, Sep 8, 2014 at 9:17 AM, Luis Periquito <periquito at gmail.com> wrote:

> Hi,
>
> I've been trying to tweak and improve the performance of our ceph
> cluster.
>
> One of the operations that I can't seem to be able to improve much is the
> delete. From what I've gathered every time there is a delete it goes
> directly to the HDD, hitting its performance - the op may be recorded in
> the journal but I don't notice almost any impact.
>
> From my tests (1M files with 512k) writing the data will take 2x as much
> as the delete operation - should there be a bigger difference? And whilst
> the delete operation is running all the remaining operations will be slower
> - it does impact the whole cluster performance in a significant way.
>
> Is there any way to improve the delete performance on the cluster? I'm
> using S3 to do all the tests, and the .rgw.bucket.index is already running
> from SSDs as is the journal. I'm running firefly 0.80.5.
>
> thanks,
>
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