ONTAP 9 Manuals ( CA08871-402 )

RDMA overview

ONTAP’s Remote Direct Memory Access (RDMA) offerings support latency-sensitive and high-bandwidth workloads. RDMA allows data to be copied directly between storage system memory and host system memory, circumventing CPU interruptions and overhead.

NFS over RDMA

You can configure NFS over RDMA to enable the use of NVIDIA GPUDirect Storage for GPU-accelerated workloads on hosts with supported NVIDIA GPUs.

RDMA is not supported with the SMB protocol.

Cluster interconnect RDMA

Cluster interconnect RDMA reduces latency, decreases failover times, and accelerates communication between nodes in a cluster.

Cluster interconnect RDMA is supported for certain hardware systems when used with X1151A cluster NICs. X91153A NICs also support cluster interconnect RDMA. Consult the table to learn what systems are supported in different ONTAP releases.

Systems Supported ONTAP versions
  • ETERNUS AX1300

  • ETERNUS AX2300

  • ETERNUS AX4200

  • ETERNUS AC2200

  • ETERNUS AX1300 ASA

  • ETERNUS AX2300 ASA

  • ETERNUS AX4200 ASA

  • ETERNUS AC2200 ASA

ONTAP 9.16.1 and later

  • ETERNUS AC2100

  • ETERNUS AC2100 ASA

ONTAP 9.14.1 and later

  • ETERNUS AX4100

  • ETERNUS AX4100 ASA

ONTAP 9.10.1 and later

Given the appropriate storage system set up, no additional configuration is needed to use cluster interconnect RDMA.

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