Hello
We are experiencing an issue where, sometimes, when users
write to cephfs an empty file is created and then the
application hangs, seemingly indefinitely. I am sometimes
able to reproduce with dd.
Does anybody know what might be going on?
Some details:
- ceph health complains about 100+ slow metadata IOs
- CPU utilization of ceph-mds is low
- We have almost 200 kernel cephfs clients
- Cephfs metadata is stored on 3 OSDs that use NVMe flash AICs
Vlad
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