Guidance on Fusion Pool sizing

revoman

Dabbler
Joined
Jan 11, 2012
Messages
13
I've been using FreeNAS/ZFS for a long time. For some reason I'm having difficulty understanding Fusion Pool's, specifically in my environment. I'd like to consolidate to one zpool, but need some guidance.

Right now I have to zpools.
1st - all nvme
- 4x1TB nvme
- 2 vdevs
- RAIDZ1
- used for high IOPS tasks such as iocage, VMWare iSCSI targets, etc
- might not actually be the right setup
2nd - all spinning rust
- 12x8TB HDD
- 1x600GB SSD (for log)
- 6 vdevs
- striped 2-way mirrors
- used for long term storage
- Moved to striped mirrors to improve IOPS (before nvme pool was added)


So, I'd like to do a few things.
1) Come up with a better design
2) gain more usable space
3) improve my resiliency
4) put metadata on nvme
5) put iocage and vmware(iscsi) volumes/data on nvme

If I were to design with the idea of using a Fusion Pool what option would be most beneficial?
* 1 pool
- 1 VDEV
- RAIDZ3
- 12 hdd's per vdev
- SSD for slog
- 8x1tb nvme for metadata/small block

* 1 pool
- 2 VDEV
- RAIDZ2
- 6x hdd's per vdev
- SSD for slog
- 8x1tb nvme for metadata/small block

or something else?

Hopefully I've asked the right questions.
Thanks in advance,
- Nate
 
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