Re: [lustre-devel] [PATCH] staging: lustre: delete the filesystem from the tree.

[Alexey Lyashkov]

> 4 ÐÑÐÑ 2018 Ð., Ð 7:15, Andreas Dilger <adilger@xxxxxxxxx> ÐÐÐÐÑÐÐ(Ð):
> 
> On Jun 3, 2018, at 9:59 PM, Alexey Lyashkov <alexey.lyashkov@xxxxxxxxx> wrote:
>> 
>>> On Sun, Jun 03 2018, Dilger, Andreas wrote:
>>> 
>>>> LNet is originally based on a high-performance networking stack called
>>>> Portals (v3, http://www.cs.sandia.gov/Portals/), with additions for LNet
>>>> routing to allow cross-network bridging.
>>>> 
>>>> A critical part of LNet is that it is for RDMA and not packet-based
>>>> messages.  Everything in Lustre is structured around RDMA.  Of course,
>>>> RDMA is not possible with TCP
>> 
>> To be clear. Soft IB (aka Soft RoCE) driver is part of OFED stack from 4.8
>> (or 4.9).  So RDMA API now is possible with TCP networks.
> 
> Well, strictly speaking RoCE still isn't possible with TCP networks.  RoCE v1
> is an Ethernet layer protocol (not IP based), while RoCE v2 is UDP/IP based.
> 
> 
Andreas,

I talk about RXE driver in OFED stack. It have works over TCP networks.
It likely to be RoCE v2 compatible as UDP tunnel use and exist for while.



Alex