Thanks a lot for your help.

Konstantin Shalygin writes:

> On 04/27/2018 05:05 PM, Igor Gajsin wrote:
>> I have a crush rule like
>
>
> You still can use device classes!
>
>
>> * host0 has a piece of data on osd.0
> Not peace, full object. If we talk about non-EC pools.
>> * host1 has pieces of data on osd.1 and osd.2
> host1 has copy on osd.1 *or* osd.2
>> * host2 has no data
> host2 also will be have one copy of object.
>
> Also do not forget - hosts with half of osds of host1 (i.e. host0 and
> host2) will be do "double work" in comparison.
> You can minimize this impact via decreasing osd crush weights for host1.
>
>
>
>
>
> k


--
With best regards,
Igor Gajsin
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