Thanks! However, I still don't really understand why I am seeing this.
The first time I had this, one of the clients was a remote user
dialling in via VPN, which could indeed be laggy. But I am also
seeing it from neighbouring hosts that are on the same physical
network with reliable ping times way below 1ms. How is that
considered laggy?
On 18/09/2023 18:07, Laura Flores
wrote:
Hi Janek,
There was some documentation added about it here: https://docs.ceph.com/en/pacific/cephfs/health-messages/
There is a description of what it means, and it's tied to an mds configurable.
On Mon, Sep 18, 2023 at 10:51 AM Janek Bevendorff <janek.bevendorff@xxxxxxxxxxxxx> wrote:
Hey all,
Since the upgrade to Ceph 16.2.14, I keep seeing the following warning:
10 client(s) laggy due to laggy OSDs
ceph health detail shows it as:
[WRN] MDS_CLIENTS_LAGGY: 10 client(s) laggy due to laggy OSDs
mds.***(mds.3): Client *** is laggy; not evicted because some
OSD(s) is/are laggy
more of this...
When I restart the client(s) or the affected MDS daemons, the message
goes away and then comes back after a while. ceph osd perf does not list
any laggy OSDs (a few with 10-60ms ping, but overwhelmingly < 1ms), so
I'm on a total loss what this even means.
I have never seen this message before nor was I able to find anything
about it. Do you have any idea what this message actually means and how
I can get rid of it?
Thanks
Janek
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Laura Flores
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Software Engineer, Ceph Storage
Chicago, IL
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M: +17087388804
-- Bauhaus-Universität Weimar Bauhausstr. 9a, R308 99423 Weimar, Germany Phone: +49 3643 58 3577 www.webis.de
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