It could also be the kernel client versions, what are you running? I remember older kernel clients didn't always deal with recovery scenarios very well.
On Mon, Jan 21, 2019 at 9:18 AM Marc Roos <M.Roos@xxxxxxxxxxxxxxxxx> wrote:
I think his downtime is coming from the mds failover, that takes a while
in my case to. But I am not using the cephfs that much yet.
-----Original Message-----
From: Robert Sander [mailto:r.sander@xxxxxxxxxxxxxxxxxxx]
Sent: 21 January 2019 10:05
To: ceph-users@xxxxxxxxxxxxxx
Subject: Re: How To Properly Failover a HA Setup
On 21.01.19 09:22, Charles Tassell wrote:
> Hello Everyone,
>
> I've got a 3 node Jewel cluster setup, and I think I'm missing
> something. When I want to take one of my nodes down for maintenance
> (kernel upgrades or the like) all of my clients (running the kernel
> module for the cephfs filesystem) hang for a couple of minutes before
> the redundant servers kick in.
Have you set the noout flag before doing cluster maintenance?
ceph osd set noout
and afterwards
ceph osd unset noout
Regards
--
Robert Sander
Heinlein Support GmbH
Schwedter Str. 8/9b, 10119 Berlin
https://www.heinlein-support.de
Tel: 030 / 405051-43
Fax: 030 / 405051-19
Amtsgericht Berlin-Charlottenburg - HRB 93818 B
Geschäftsführer: Peer Heinlein - Sitz: Berlin
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