10gb ethernet MBP to Mac mini getting slow read speeds

[evbartl]

I've got an M1 2020 Mac mini connected to a Macbook pro 2021 M1 Pro via 10gb ethernet and two OWC 10gb ethernet adapters.

I'm getting 651MB/s write speeds, but 131MB/s read speeds, which is slower than i was expecting because I get close to those read speeds over gigabit ethernet.

Any ideas on what may be slowing down the read speeds?

 

[tvv]

Make sure you have jumbo frames enabled.

 

[evbartl]

Thanks! Ignorant question, but how do i do that?

 

[appltech]

In this article is tep-to-step with pictures information (older OS but clear what to open)

How do I set Jumbo Frames on OSX?

Note that if this setting is changes, all devices on that network connection will need to change as well such as switch, and server NIC ports. 1. Open System Preferences 2. Go to Network 3. The 10GbE

support.promax.com

And Check out this thread for MTU

https://forums.macrumors.com/threads/how-to-enable-jumbo-frames-on-mac-mini-m1.2370303/

 

[evbartl]

Thanks! Turned it on, but it didnt make a difference. Do I need it on both computers or just the one that I'm accessing?

 

[tvv]

Need it on both.

 

[Kgeee]

Do a network speed test between the two machines using iPerf.

Also do a disk speed test on both machines to see if the issue is the write and write speed of any of the machines.

This will probably give you a clue as you where the problem lies.

 

[evbartl]

Thanks everyone, the jumbo frames seemed to have worked. I'm now regularly accessing files super quickly off the OWC thunderbay 4 on my mac mini from my MBP 14 via two owc 10gb adapters and a QNAP switch with 10GB ports... really cool to finally get this working