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Anands_m
Contributor
Contributor

UDP performance of a connection restricted to under 1Gbps between Esxi 6.0 Servers

Hi,

I have 2 Esxi 6.0 servers. There is on Debian Linux virtual machine in each of these servers. The Linux virtual machines are connected by a 10Giabit X540 AT2 network adapters (back to back) . A single connection UDP throughput does not go beyond 850Mbps. However with multiple UDP connections can go beyond 850Mbps (with 3 connection it is 3 * 8950 Mbps). The maximum throughput achieved is around 4Gbps (a single tcp or with mulitple UDP connections).  A standard switch is created in each Esxi Serverr for the network adapter.

Whey is single UDP connection throughput limited to 850Mbps where as single TCP connection can reach 4Gbps?

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mhampto
VMware Employee
VMware Employee

Please review Low throughput for UDP workloads on Windows virtual machines (2040065) that may shed more light on this issue.

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