We have two SuperStorage Server 6049PE1CR36L each with 24 - 4TB disks. At the moment we are running Ubuntu 18.04 but this is negotiable if it helps solve our problem. We are using Ext4 as the OS filesystem, and OpenZFS for the data. We have an HBA, not a hardware RAID controller.
ZFS currently dos not support mirroring across a network (ETH). We are considering cross-linking the the JBODs to each other, so each OS recognizes the other's hard drives (and ZFS filesystem.) We have tested this already, and this is possible via the hardware.
The ZFS mirror would use a stripe/raidz of drives on one JBOD, mirrored to a stripe/raidz of drives on the second JBOD.
The question is; is it possible to mount BOTH sides of the mirror (the server built into each JBOD is attached to it's side of the mirror) so that - in the event of a failover, the second mount could seamlessly begin being used?
As an aside, the reason we are considering this is because we were using Glusterfs as a distributed filesystem to handle the mirroring, but the performance is literally 1/10 what we should be getting.
We are not sure why, so if anyone has ideas about that issue - please feel free.
