Upgrading QNAP NAS (2x) - tough choices

Started 3 months ago | Discussions thread
DerKeyser Contributing Member • Posts: 735
Re: Upgrading QNAP NAS (2x) - tough choices

Remember that for iSCSI you don’t need faster ethernet links. iSCSI can use several gigabit links in parallel if you set it up correctly. On ESXi you need to make more than one VMKernel adapter that you do iSCSI port binding on. On your QNAP you need to present the same LUN on several NIC targets. Then you should enable Round Robin I/O i ESXi, and you will have 2Gbit, 3Gbit or however many adapters you enable.
I would setup two adapters on easu ESXi server, and three or four on the QNAP. That way each server can do 2Gbit, and the QNAP can do 3 or 4Gbit combined across the ESXi hosts.

Obviously that also requires a SSD layer in the QNAP if there is anything remotely random in the IO pattern (And there is since you have 15 VMs)

The most “felt” gain will definitely come from adding a large SSD tier to your iSCSI LUNS. The boottime and “interactiveness” of your VM’s will become MUCH better.

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