Remote direct memory access: Difference between revisions

Revision as of 05:28, 14 March 2019

Revision as of 02:58, 17 March 2019

Line 2:

== Overview ==

RDMA supports [[zero-copy]] networking by enabling the [[network adapter]] to transfer data from the wire directly to application memory or from application memory directly to the wire, eliminating the need to copy data between application memory and the data buffers in the operating system. Such transfers require no work to be done by [[Central processing unit|CPUs]], [[CPU cache|caches]], or [[context switch]]es, and transfers continue in parallel with other system operations. WhenThis an application performs an RDMA Read or Write request, the application data is delivered directly to the network, reducingreduces latency and enabling fastin message transfer.

However, this strategy presents several problems related to the fact that the target node is not notified of the completion of the request (single-sided communications).