Re: Openstack VM IOPS drops dramatically during Ceph recovery

["huxiaoyu@xxxxxxxxxxxx" <huxiaoyu@xxxxxxxxxxxx>]

Hello， Robert，

I happened to find a note that you wrote in Nov 2015: http://lists.ceph.com/pipermail/ceph-users-ceph.com/2015-November/006173.html

and I believe this is what i just hit exactly the same behavior : a host down will badly take the client performance down 1/10 (with 200MB/s recovery workload) and then took ten minutes  to get good control of OSD recovery.

Could you please share how did you eventally solve that issue? by seting a fair large OSD recovery delay start or any other parameter?

best regards,

samuel

 

---

huxiaoyu@xxxxxxxxxxxx

 

From: Robert LeBlanc

Date: 2019-10-16 21:46

To: huxiaoyu@xxxxxxxxxxxx

CC: ceph-users

Subject: Re: Re: Openstack VM IOPS drops dramatically during Ceph recovery

On Wed, Oct 16, 2019 at 11:53 AM huxiaoyu@xxxxxxxxxxxx

<huxiaoyu@xxxxxxxxxxxx> wrote:

>

> My Ceph version is Luminuous 12.2.12. Do you think should i upgrade to Nautilus, or will Nautilus have a better control of recovery/backfilling?

 

We have a Jewel cluster and Luminuous cluster that we have changed

these settings on and it really helped both of them.

 

----------------

Robert LeBlanc

PGP Fingerprint 79A2 9CA4 6CC4 45DD A904  C70E E654 3BB2 FA62 B9F1

 

_______________________________________________
ceph-users mailing list
ceph-users@xxxxxxxxxxxxxx
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com