ESXi with USB NIC for vSAN and Storage - A Good Idea?
About a month ago, the USB Native Driver Fling has added support for 2.5 Gbit Network adapters. Until then it was clear that the embedded network interface is faster and more stable, compared to a 1Gbit USB Network adapter. I've never used a USB NIC for storage or management traffic.
With the support of 2.5GBASE-T network adapters, I wondered if it is a good idea to use them for accessing shared storage or for vSAN traffic.
It is obvious that a 2.5 Gbit adapter has a higher bandwidth, but due to the USB overhead, there should be a penalty to latency. But how bad will it be? To figure out the impact, I did some testing.
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