Currently, this can only be done by hand. Maybe we need some scripts to handle 
this automatically.
I don't know if 
https://github.com/ceph/ceph/tree/master/src/pybind/mgr/balancer can handle 
this.

________________________________________
From: Konstantin Shalygin <k0...@k0ste.ru>
Sent: Thursday, April 12, 2018 12:00
To: ceph-users@lists.ceph.com
Cc: ?? ?
Subject: Re: [ceph-users] osds with different disk sizes may killing performance

On 04/12/2018 10:58 AM, ?? ? wrote:
> Yes, according to crush algorithms, large drives are given high weight, this 
> is expected. By default, crush gives no consideration of each drive's 
> performance, which may cause the performance distribution is not balanced. 
> And the highest io util osd may slow down the whole cluster.


You can control 'how much use' drive via adjusting crush weights.




k
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