How many PGs ? How many pool (and how many data, please post rados df)

On 13/09/2017 22:30, Sinan Polat wrote:
> Hi,
> 
>  
> 
> I have 52 OSD's in my cluster, all with the same disk size and same weight.
> 
>  
> 
> When I perform a:
> 
> ceph osd df
> 
>  
> 
> The disk with the least available space: 863G
> 
> The disk with the most available space: 1055G
> 
>  
> 
> I expect the available space or the usage on the disks to be the same, since
> they have the same weight, but there is a difference of almost 200GB.
> 
>  
> 
> Due to this, the MAX AVAIL in ceph df is lower than expected (the MAX AVAIL
> is based on the disk with the least available space).
> 
>  
> 
> -          How can I balance the disk usage over the disks, so the usage /
> available space on each disk is more or less the same?
> 
> -          What will happen if I hit the MAX AVAIL, while most of the disks
> still have space?
> 
>  
> 
> Thanks!
> 
> Sinan
> 
> 
> 
> 
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> 

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