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[WRN] MDS_CLIENT_RECALL: 1 clients failing to respond to cache pressure

f.cuseo
66 Posts

January 25, 2024, 9:54 am

Quote from f.cuseo on January 25, 2024, 9:54 am

Hello.

I have this warning; I have just set mds memory cache from 4 to 8Gbyte, but after some minutes I have again this warning.

My nfs (cephfs exported) storage is about 10/12Tbyte, but only 33.000 files.

I also have read:
https://cephdocs.s3-website.cern.ch/ops/cephfs_warnings.html#ceph-logging-wrn-clients-failing-to-respond-to-cache-pressure
that: "Note: Ceph-fuse v13.2.1 has a bug which triggers this issue -- users should update to a newer client release"

What can I test ?
Thanks, Fabrizio

(my df -i)
172.16.34.11,172.16.34.12,172.16.34.13:/ 22931007 - - - /mnt/cephfs
(my df -h)
172.16.34.11,172.16.34.12,172.16.34.13:/ 859T 56T 804T 7% /mnt/cephfs

root@petasan-10:/mnt/cephfs# du -h --max-depth=1
12T ./cephfsec
12T .

root@petasan-10:/mnt/cephfs# find . -type f -print | wc
33760 34829 4573426

Hello.

I have this warning; I have just set mds memory cache from 4 to 8Gbyte, but after some minutes I have again this warning.

My nfs (cephfs exported) storage is about 10/12Tbyte, but only 33.000 files.

I also have read:
https://cephdocs.s3-website.cern.ch/ops/cephfs_warnings.html#ceph-logging-wrn-clients-failing-to-respond-to-cache-pressure
that: "Note: Ceph-fuse v13.2.1 has a bug which triggers this issue -- users should update to a newer client release"

What can I test ?
Thanks, Fabrizio

(my df -i)
172.16.34.11,172.16.34.12,172.16.34.13:/ 22931007 - - - /mnt/cephfs
(my df -h)
172.16.34.11,172.16.34.12,172.16.34.13:/ 859T 56T 804T 7% /mnt/cephfs

root@petasan-10:/mnt/cephfs# du -h --max-depth=1
12T ./cephfsec
12T .

root@petasan-10:/mnt/cephfs# find . -type f -print | wc
33760 34829 4573426

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