Vdev balance

ver151set

Dabbler
Joined
Jan 28, 2015
Messages
37
From reading I was under the impression with different sized vdevs zfs would balance the pool based on free space so you would end up with roughly same used percentage on each vdev in the pool no matter the size. After a recent rebalance I find this isnt true and I have done this once the past and found the same

It seems to want to put the same amount of data on each drive with no regard to free space or drive size

Mirrored vdevs, 5 total in this pool
4 - 16tb mirrors
1 - 6tb mirror

Before rebalance
16 24%
16 24%
16 78%
16 70%
6 99%

After rebalance
16 47%
16 47%
16 52%
16 51%
6 98%

Has zfs balancing changed?

I will run the balance script one more time but I believe results will be the same as I did perform this a year or so ago after another previous drive size upgrade
 
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