What kind of physical adapter is better to use vSAN traffic (What feature better to support )

[baber]

I want buy physical adapter for vSAN traffic . Is that important buy a model that can support specific features ?

[depping]

Network adapter I assume? I would go for the fastest you can afford, of course depending on your switches, and if you can RDMA 

[baber]

Exactly, My means was Network adapter. I am using cisco nexus 5000 switch .

1- As I know RDMA is suitable for vms with Linux OS is that correct ?

2- Is that your means search in network adapter data sheet to support RDMA and choose it ?

[depping]

vSAN and vSphere also support RDMA, it provides a lower-latency connection between hosts for vSAN traffic, or vMotion etc.