RDMA protocol: improving network performance
technology brief
Abstract.............................................................................................................................................. 2
Introduction......................................................................................................................................... 2
Limitations of TCP/IP ............................................................................................................................ 2
RDMA solution .................................................................................................................................... 3
RDMA over TCP .................................................................................................................................. 4
RDMA protocol overview .................................................................................................................. 5
Send operations ........................................................................................................................... 6
RDMA write ................................................................................................................................. 7
RDMA read ................................................................................................................................. 7
Terminate .................................................................................................................................... 7
Verbs.............................................................................................................................................. 7
RNIC interface ................................................................................................................................. 8
RDMA over InfiniBand.......................................................................................................................... 9
InfiniBand RDMA protocols ............................................................................................................. 10
Sockets Direct Protocol ................................................................................................................ 10
SCSI RDMA Protocol................................................................................................................... 11
InfiniBand link operation ................................................................................................................. 11
Conclusion........................................................................................................................................ 11
For more information.......................................................................................................................... 12
Call to action .................................................................................................................................... 12