I have a 24 drive bay case currently with a separate NetApp disk shelf connected to it.
In the case, I currently have 14 x 10TB drives and 4 x 8TB drives - so 6 bays free. These are all put into a big zpool using mirrored vdevs.
Now, I've realised that most of my file access is read more than write and I'd like the capacity I could gain from say, RAID-Z2 or Z3 vs the mirrors I currently use.
I'm thinking of doing the following setup:
1. zpool with the 4 x 8TB drives in mirrored vdevs, giving 14TiB usable space
2. zpool with the 14 x 10TB drives - either 2 x RAID-Z2 or 2 x RAID-Z3.
According to this (https://wintelguy.com/zfs-calc.pl) calculator, I'd get:
1. 82TiB with 2 x 7 disk RAID-Z2 vdevs
2. 70TiB with 2 x 7 disk RAID-Z3 vdevs
3. 60TiB with 7 x 2 disk mirror vdevs
If I was crazy and did a 14 drive RAID-Z3, that'd be 89TiB but I imagine that's not very practical if it ever needs to be resilvered - would that be correct assumption? I can dedicate all of the system's resources (ie. put it into "no read/no write" mode) to resilvering when/if I need to resilver the zpool, so maybe that'd help in terms of reducing resilver time?
Anyway, if anyone has any info/input or experiences with figuring out such setups it'd be nice to hear those opinions :)
Thank you!
In the case, I currently have 14 x 10TB drives and 4 x 8TB drives - so 6 bays free. These are all put into a big zpool using mirrored vdevs.
Now, I've realised that most of my file access is read more than write and I'd like the capacity I could gain from say, RAID-Z2 or Z3 vs the mirrors I currently use.
I'm thinking of doing the following setup:
1. zpool with the 4 x 8TB drives in mirrored vdevs, giving 14TiB usable space
2. zpool with the 14 x 10TB drives - either 2 x RAID-Z2 or 2 x RAID-Z3.
According to this (https://wintelguy.com/zfs-calc.pl) calculator, I'd get:
1. 82TiB with 2 x 7 disk RAID-Z2 vdevs
2. 70TiB with 2 x 7 disk RAID-Z3 vdevs
3. 60TiB with 7 x 2 disk mirror vdevs
If I was crazy and did a 14 drive RAID-Z3, that'd be 89TiB but I imagine that's not very practical if it ever needs to be resilvered - would that be correct assumption? I can dedicate all of the system's resources (ie. put it into "no read/no write" mode) to resilvering when/if I need to resilver the zpool, so maybe that'd help in terms of reducing resilver time?
Anyway, if anyone has any info/input or experiences with figuring out such setups it'd be nice to hear those opinions :)
Thank you!
