Re: How to reduce HDD OSD flapping due to rocksdb compacting event?

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Hello Charles,

On Wed, 10 Apr 2019 14:07:58 +0700 Charles Alva wrote:

> Hi Ceph Users,
> 
> Is there a way around to minimize rocksdb compacting event so that it won't
> use all the spinning disk IO utilization and avoid it being marked as down
> due to fail to send heartbeat to others?
> 
> Right now we have frequent high IO disk utilization for every 20-25 minutes
> where the rocksdb reaches level 4 with 67GB data to compact.
> 
> 
Could you please follow up on the questions Wido asked?

As in sizes of disk, DB, number and size of objects (I think you're using
object store), how busy those disks and CPUs are, etc.

That kind of information will be invaluable for others here and likely the
developers as well.

Regards,

Christian

> Kind regards,
> 
> Charles Alva
> Sent from Gmail Mobile


-- 
Christian Balzer        Network/Systems Engineer                
chibi@xxxxxxx   	Rakuten Communications
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