Re: [ceph-users] ceph cluster experiencing major performance issues

2017-08-08 Thread Nick Fisk
> -Original Message- > From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of > Mclean, Patrick > Sent: 08 August 2017 20:13 > To: David Turner ; ceph-us...@ceph.com > Cc: Colenbrander, Roelof ; Payno, > Victor ; Yip, Rae > Subject: Re: [

Re: [ceph-users] ceph cluster experiencing major performance issues

2017-08-08 Thread Mclean, Patrick
On 08/08/17 10:50 AM, David Turner wrote: > Are you also seeing osds marking themselves down for a little bit and > then coming back up? There are 2 very likely problems > causing/contributing to this. The first is if you are using a lot of > snapshots. Deleting snapshots is a very expensive ope

Re: [ceph-users] ceph cluster experiencing major performance issues

2017-08-08 Thread David Turner
Are you also seeing osds marking themselves down for a little bit and then coming back up? There are 2 very likely problems causing/contributing to this. The first is if you are using a lot of snapshots. Deleting snapshots is a very expensive operation for your cluster and can cause a lot of slo