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cooper101
Contributor
Contributor

HP SAN 10gb hba only 1gb to windows. Linux faster

Hello.

I have a single host running 6.7 13980272 build. connected to a HP MSA2050 via 10gb HBA to a HP DL 380 G10 connected to LAN at 10gb to Netgear 10gb switch. the SAN has 20

Using Hiperf3 to test copy speed on windows server. Getting around 4gb on the windows host. When running same test on linux I'm getting between 9gb. this is across the vswitch.

Any suggestions of what I can do to increase speed on windows because the performance is unacceptable. Or is this down to overhead of windows virtualisation.

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jburen
Expert
Expert

For best performance you can disable certain Windows features that are not supported by the VMXNET3 driver:

  • TCP Chimney
  • Auto Tuning
  • Congestion Provider
  • Task Offloading
  • ECN Capability

All these features can be disabled with the NETSH command.

Also enable the Receive Side scaling option (netsh int tcp set global RSS=Enable) and finally disable RSC (Receive Segment Coalescing)

You can check features with this command: netsh int tcp show global.

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cooper101
Contributor
Contributor

@ Jburen. Should have said that that's already been done.

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