Testing 10g, only get 500m.

[cbarbie]

I know I must have missed something.

I installed the version 7.0-2, no subscription.
Updated the libraries.
My switch sees a 10G connection.

I never get throughput above 500mb/s. Tried:

• loading a .ISO to the local store
• creating a VM and downloading a large file
• creating a RAM disk in the VM and download to it.

All test date sent from another test system that has 10G and routinely exceeds 3gb/s
Details of the test system attached.


What else should I check?
Thanks!

 

[cbarbie]

After another reboot of the host...

• iperf3 worked. A parallel of 4 got me to just over 9g/s.
• Copying to/from Ramdisk worked. Averaged 4g/s.
• Copying to the local ZFS mirror or RaidZ2 started off fast (4g/s), then slowed down (<1g/s), as expected.

 

[Dunuin]

If you want the full performance you should try a 9000 MTU. Here my CPUs just can't handle all the packets and only reach 3000-4000 Gbit/s using MTU 1500 but with jumboframes you get less packages and 9000-10000 Gbit/s are possible.