Considering the feedback we got yesterday (and not previously knowing TrueNAS support ISCSI), we took a chance this morning and setup a ISCSI connection:
Created a "file" ISCSI connection on the same pool with the SLOG
Setup in XCP / XO
Migrated VM to the ISCSI SR
And wow, what a difference, jumping from approximately 44.6MB to 76MB/s and IOPS jumping from 10.9 to 17.8k
This leads me then to believe if we designate a sub section of the pool in TrueNAS for ISCSI, we will be able to reap the benefits of both by leaving "data" disks on the NFS (so that we can benefit from thin) and put disks within the ISCSI SR (understanding that it will be full VDI)
Questions:
With regards to backups / Delta replication, can I mix / match backups where some disks are VHD (thin) and some are full LVM? I assume that the first backup will always be the longest (as it will need to backup the full say 50GB of the disk isntead of the thin file) - Will this impact delta replication / backups?
Any risks with the intended setup? I can only assume that other people might be doing something similar?
I was really amazed with the simplicity of the ISCSI setup between TrueNAS and XCP - We have an equallogic and I attempted to setup ISCSI but it was extremely difficult if you dont understand the semantics involved