> the ZFS_Best_Practises_Guide states this:
>
> "Keep vdevs belonging to one zpool of similar sizes; Otherwise, as the
> pool fills up, new allocations will be forced to favor larger vdevs
> over smaller ones and this will cause subsequent reads to come from a
> subset of underlying devices leadin
Basically I think yes you need to add all the vdevs you require in the
circumstances you describe.
You just have to consider what ZFS is able to do with the disks that
you give it. If you have 4x mirrors to start with then all writes will
be spread across all disks and you will get nice per
The way I understand it is that you should add new mirrors (vdevs) of the same
size as the other vdevs already attached to the said pool. That is, if your
vdevs are mirrors of 2TB drives, don't add a new mirror of, say, 1TB drives.
I might be wrong but this is my understanding.
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This message
Hi,
the ZFS_Best_Practises_Guide states this:
"Keep vdevs belonging to one zpool of similar sizes; Otherwise, as the
pool fills up, new allocations will be forced to favor larger vdevs over
smaller ones and this will cause subsequent reads to come from a subset
of underlying devices leading
