Gluster on ZFS with Compression

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I'm revisiting Gluster for the purpose of hosting Virtual Machine images (KVM). I was considering the following configuration

2 Nodes
- 1 Brick per node (replication = 2)
- 2 * 1GB Eth, LACP Bonded
- Bricks hosted on ZFS
- VM Images accessed via Block driver (gfapi)

ZFS Config:
- Raid 10
- SSD SLOG and L2ARC
- 4 GB RAM
 - Compression (lz4)

Does that seem like an sane layout?

Question: With the gfapi driver, does the vm image appear as a file on the host (zfs) file system?


Background: I currently have our VM's hosted on Ceph using a similar config as above, minus zfs. I've found that the performance for such a small setup is terrible, the maintenance headache is high and when a drive drops out, the performance gets *really* bad. Last time I checked, gluster was much slower at healing large files than ceph, I'm hoping that has improved :)

--
Lindsay
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