In an ABS cluster, the Chunk services between nodes use the ABS private protocol to transmit control commands and data. There are two ways to carry the ABS protocol on a network link:
RDMA (Remote Direct Memory Access)
RDMA enables high-speed data exchange by allowing direct reads and writes to the local memory of a remote computer over the network. ABS supports RoCEv2 (RDMA over Converged Ethernet v2) mode. If your physical network environment supports RDMA capabilities, it is recommended to enable this mode to achieve better network performance.
TCP
If RDMA is not enabled or the network environment does not support RDMA, the system automatically switches to TCP mode for communication between nodes.
