Does someone got any ideas on this?

The mgr nodes are separate, pg_autoscaler is also not active (I don‘t know how 
the impact will be on a 1pb storage), and it also happens when I turn of an osd 
service on any node. 

it’s the latest ceph nautilus. 

Cheers
 - Boris

> Am 28.05.2020 um 23:42 schrieb Boris Behrens <b...@kervyn.de>:
> 
> Dear people on this mailing list,
> 
> I've got the "problem" that our MAX AVAIL value  increases by about
> 5-10 TB when I reboot a whole OSD node. After the reboot the value
> goes back to normal.
> 
> I would love to know WHY.
> 
> Under normal circumstances I would ignore this behavior, but because I
> am very new to the whole ceph software I would like to know why stuff
> like this happens.
> What I read is, that this value will be calculated by the most filled OSD.
> 
> I've set noout and norebalance while the node is offline and I unset
> both values after the reboot.
> 
> We are currently on nautilus.
> 
> Cheers and thanks in advance
> Boris
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