[ceph-users] commit_latency equals apply_latency on bluestore

Gregory Farnum gfarnum at redhat.com
Tue Oct 2 21:39:45 PDT 2018


As I mentioned in that email, the apply and commit values in BlueStore are
equivalent. They're exported because it's part of the interface (thanks to
FileStore), but they won't differ. If you're doing monitoring or graphs,
just pick one.
-Greg

On Tue, Oct 2, 2018 at 3:43 PM Jakub Jaszewski <jaszewski.jakub at gmail.com>
wrote:

> Hi Cephers, Hi Gregory,
>
> I consider same case like here, commit_latency==apply_latency in ceph osd
> perf
>
>
> http://lists.ceph.com/pipermail/ceph-users-ceph.com/2018-January/024317.html
>
> What's the meaning of commit_latency and apply_latency in bluestore OSD
> setups[? How useful is it when troubleshooting? How does it correspond to
> separated block.db and block.wal ?
>
> Thanks
> Jakub
>
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