> 4 июня 2018 г., в 7:15, Andreas Dilger <adilger@xxxxxxxxx> написал(а): > > 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
