TrueNAS Scale ZFS Bottleneck - The Quest For 1000 MB/sec Reads
I'm trying to figure out what could be causing the bottleneck on my NAS. By my calculations I should be able to easily hit over 1000 MB/sec sustained read but I don't know why I'm not. Any useful troubleshooting advice would be appreciated.
I ran an iperf3 test and noticed that my network connection seemed to be maxing out at 6 Gb/sec (750 MB/sec). So I changed NICs on the client machine to use the onboard 10 Gbit NIC (Marvell AQtion) instead of the Cisco/Intel X710-DA. It seems like it was a NIC issue with the X710-DA because now I’m getting way faster speeds. So at this point I’m wondering if it’s a driver issue with the X710-DA, the SFP+ module, or the NIC itself. But at least I know now what was causing the bottleneck.