Shared Memory Communications

Shared Memory Communications (SMC) enables two SMC capable peers to communicate by using memory buffers that each peer allocates for the partner's use. There are two types of Shared Memory Communications:
  • Shared Memory Communications over Remote Direct Memory Access (SMC-R)
  • Shared Memory Communications - Direct Memory Access (SMC-D)
SMC improves throughput, lowers latency and cost, and maintains existing functions. You do not need to change resources, such as host names and IP addresses, because you can use existing IP topology and addressing to identify virtual servers. You do not need to modify applications to use SMC to gain the performance benefits of communication by using SMC. Existing functions are preserved when SMC is used, such as the following functions:
  • Load balancing, for example, sysplex distribution
  • IP security zones
  • Connection level security
Start of change
Reference:
  • The Network Express feature introduces a new generation of OSA along with simplifications and improvements in RoCE connectivity. This technology also introduces new terminology. For more information, refer to the Network Express and SMC-R topics in the Conventions and terminology section under Abstract for IP Configuration Guide.
  • See Shared Memory Communications reference information for a comprehensive list of materials for solutions that are related to Shared Memory Communications: SMC-R, SMC-D, and SMC Applicability Tool (SMC-AT).
End of change