Hi,
i'm trying to lower write latency on ceph ssd without success.
env: small prod site, v 7.1.10.3 pc, 1Gpbs. 13 ceph entry ssd with different sizes, from 200GB do 1TB, older ones. 10 vm linux, not IO demanding. I had similar problem with elastic and hdd, default options was to many threads. After lowering number of threads from 10 to 1 all fine. Atop shows 118 threads for 1 osd, to many ? how to lower that number ? I've tried with lowering threads on osd but nothing.
Through day work is...
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i'm trying to lower write latency on ceph ssd without success.
env: small prod site, v 7.1.10.3 pc, 1Gpbs. 13 ceph entry ssd with different sizes, from 200GB do 1TB, older ones. 10 vm linux, not IO demanding. I had similar problem with elastic and hdd, default options was to many threads. After lowering number of threads from 10 to 1 all fine. Atop shows 118 threads for 1 osd, to many ? how to lower that number ? I've tried with lowering threads on osd but nothing.
Through day work is...
Read more