Very solid advice here - that’s the beauty of Ceph community.
Just adding to what Anthony mentioned: a reweight from 1 to 0.2 (and back) is
quite extreme and the cluster won’t like it.
We never go above increments/decrements of 0.02-0.04. If you have to go from 1
to 0.98 and then to 0.96 and so
> Very solid advice here - that’s the beauty of Ceph community.
>
> Just adding to what Anthony mentioned: a reweight from 1 to 0.2 (and back) is
> quite extreme and the cluster won’t like it.
And these days with the balancer, pg-upmap entries to the same effect are a
better idea.
> From the
Interesting. You're right:
# ceph config get osd osd_max_backfills
10
## ceph-conf --show-config | egrep osd_max_backfills
osd_max_backfills = 1
I don't know why that is happening.
On Sat, 4 Jan 2025 at 17:13, Laimis Juzeliūnas
wrote:
> One more question:
> What’s the output of 'ceph config get
>
> Are you using mclock?
I'm not sure. I'll read about it.
What happens if you set it through the Ceph UI?
There are *global*,* mon*,* mgr*,* osd*,* mds *and* client* values that I
changed to 10 (the default is 1):
[image: image.png]
...but the output is still:
# ceph-conf --show-config | egrep
>
> What reweighs have been set for the top OSDs (ceph osd df tree)?
>
Right now they are all at 1.0. I had to lower them to something close to
0.2 in order to free up space but I changed them back to 1.0. Should I
lower them while the backfill is happening?
On Sat, 4 Jan 2025 at 17:18, Laimis Juz
>
> Do you use the autoscalar or did you trigger a manual PG increment of the
> pool?
The pool had autoscale enabled until 2 days ago when I thought it was
better to change things manually in order to have a more deterministic
result. Yes, I wanted to increase from "1" to something like "1024" but
>> Do you use the autoscalar or did you trigger a manual PG increment of the
>> pool?
>
> The pool had autoscale enabled until 2 days ago when I thought it was
> better to change things manually in order to have a more deterministic
> result. Yes, I wanted to increase from "1" to something like "
>> What reweighs have been set for the top OSDs (ceph osd df tree)?
>>
> Right now they are all at 1.0. I had to lower them to something close to
> 0.2 in order to free up space but I changed them back to 1.0. Should I
> lower them while the backfill is happening?
Old-style legacy override rewei
