OSA-Express6S is designed for high-speed communication or to consolidate file servers onto IBM Z with an External LAN. The workloads can be Internet Protocol-based (IP) or non-IP based. OSA-Express6S and RoCE are integrated hardware features optimized for your mainframe Ethernet local area network (LAN) connections.
The RoCE Express feature is designed to support high-performance system interconnections. It provides the RDMA capability exploited in the Shared Memory Communications-RDMA (SMC-R) protocol, and can also be utilized in Linux for both RDMA and standard TCP/IP workloads.