1, 2 times a year we are having similar problem in *not* ceph disk cluster,
where working -> but slow disk writes give us slow reads. We somehow
"understand it", since probably slow writes fill up queues and buffers.
On Thu, Mar 9, 2023 at 11:37 AM Andrej Filipcic
wrote:
>
> Thanks for the hint
Thanks for the hint, did run some short test, all fine. I am not sure
it's a drive issue.
Some more digging, the file with bad performance has this segments:
[root@afsvos01 vicepa]# hdparm --fibmap $PWD/0
/vicepa/0:
filesystem blocksize 4096, begins at LBA 2048; assuming 512 byte sectors.
by
When I have seen behavior like this it was a dying drive. It only became
obviously when I did a smart long test and I got failed reads. Still reported
smart OK though so that was a lie.
--
Paul Mezzanini
Platform Engineer III
Research Computing
Rochester Institute of Technology
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