Hi all,
osd_heartbeat_grace = 20 and osd_pool_default_read_lease_ratio = 0.8 by
default, so, pg will wait 16s when osd restart in the worst case. This wait
time is too long, client i/o can not be unacceptable. I think adjusting
the osd_pool_default_read_lease_ratio to lower is a good way. Have any
Hello,
When you say "osd restart", what sort of restart are you referring to
- planned (e.g. for upgrades or maintenance) or unplanned (OSD
hang/crash, host issue, etc.)? If it's the former, then these
parameters shouldn't matter provided that you're running a recent
enough Ceph with default setti
I cannnot find anything interesting in the cephadm.log
now the error is
HEALTH_ERR
Module 'cephadm' has failed: 'cephadm'
Idea how to fix it ?
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I find out with ceph orch ps
cephadm.8d0364fef6c92fc3580b0d022e32241348e6f11a7694d2b957cdafcb9d059ff2
srvcephprod04 stopped4m ago -
cephadm.8d0364fef6c92fc3580b0d022e32241348e6f11a7694d2b
looking at ceph orch upgrade check
I find out
},
"cephadm.8d0364fef6c92fc3580b0d022e32241348e6f11a7694d2b957cdafcb9d059ff2": {
"current_id": null,
"current_name": null,
"current_version": null
},
Could this lead to the issue?
Hi all,
osd_heartbeat_grace = 20 and osd_pool_default_read_lease_ratio = 0.8 by
default, so, pg will wait 16s when osd restart in the worst case. This wait
time is too long, client i/o can not be unacceptable. I think adjusting
the osd_pool_default_read_lease_ratio to lower is a good way. Have any
We have an internal use case where we back the storage of a proprietary
database by a shared file system. We noticed something very odd when
testing some workload with a local block device backed file system vs
cephfs. We noticed that the amount of network IO done by cephfs is almost
double compare
Also, I am able to reproduce the network read amplification when I try to
do very small reads from larger files. e.g.
for i in $(seq 1 1); do
dd if=test_${i} of=/dev/null bs=5k count=10
done
This piece of code generates a network traffic of 3.3 GB while it actually
reads approx 500 MB of d
The things in "ceph orch ps" output are gathered by checking the contents
of the /var/lib/ceph// directory on the host. Those
"cephadm." files get deployed normally though, and aren't usually
reported in "ceph orch ps" as it should only report things that are
directories rather than files. You coul
