IBM z13s Technical Manual page 503

Shared Memory
Appendix D.
Communications
This appendix briefly describes the optional Shared Memory Communications (SMC)
functionality implemented on IBM z Systems servers as Shared Memory Communications -
Remote Direct Memory Access (SMC-R) and the new Shared Memory Communications -
Direct Memory Access (SMC-D) of the IBM z13 and z13s servers.
This appendix includes the following sections:
Shared Memory Communications overview
Shared Memory Communication over RDMA
Shared Memory Communications - Direct Memory Access
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