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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