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I'm guessing that RDMA only applies for performance benchmarks of clustered / sharded Redis setups right? I would expect vertical scaling to have better perfor
by LunaSea 2y ago
I'm guessing that RDMA only applies for performance benchmarks of clustered / sharded Redis setups right?
I would expect vertical scaling to have better performance for most use cases as you can get cheap servers with very large amounts of RAM and high number of CPU cores.
- olavgg 2y agoNo, the thing about RDMA is that it significantly lowers latency and allows for copying of data without involving the cpu. If you use RoCE, you need advanced network switches that support PFC, ECN, DCBX that allows for lossless ethernet with the ability to pause frames to see any benefit. While lossy RoCE do work on newer generation of network interfaces, it comes with quirks and may not be any faster than TCP.