Hi Daniel,
On 4/1/25 2:05 PM, Daniel Kobras wrote:
Hi Rik!
Am 15.12.24 um 13:38 schrieb Rik Theys:
Suddenly, a number of clients start to send an abnormal amount of NFS
traffic to the server that saturates their link and never seems to
stop. Running iotop on the clients shows
kworker-{rpciod,nfsiod,xprtiod} processes generating the write
traffic. On the server side, the system seems to process the traffic
as the disks are processing the write requests.
This behavior continues even after stopping all user processes on the
clients and unmounting the NFS mount on the client. Is this normal? I
was under the impression that once the NFS mount is unmounted no
further traffic to the server should be visible?
I'm currently looking at an issue that resembles your description
above (excess traffic to the server for data that was already written
and committed), and part of the packet capture also looks roughly
similar to what you've sent in a followup. Before I dig any deeper:
Did you manage to pinpoint or resolve the problem in the meantime?
Our server is currently running the 6.12 LTS kernel and we haven't had
this specific issue any more. But we were never able to reproduce it, so
unfortunately I can't say for sure if it's fixed, or what fixed it :-/.
Which kernel version(s) are your server and clients running?
Regards,
Rik
--
Rik Theys
System Engineer
KU Leuven - Dept. Elektrotechniek (ESAT)
Kasteelpark Arenberg 10 bus 2440 - B-3001 Leuven-Heverlee
+32(0)16/32.11.07
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