(SOLVED) iperf speed at 2.5GbE but SMB is stuck at Gigabit

[Italiandevil0505]

When I run a speed test to the server I can't get the full 2.5GbE but when I run a file transfer it caps out at 129MB/sec even if I am copying from the cache drive. If I transfer to or from an NVME on the server to the cache drive on the server I get the full speed. My Desktop PC drive has two SSD drives and transfers between them exceed 500MB/sec. I attached some pictures. Any help would be appreciated. Thanks

 

 

Edited December 17, 2020 by Italiandevil0505
Solved

[Italiandevil0505]

Here is the diagnostics log. Any help would be much appreciated. The funny thing is, I remember when I first started testing this out I was getting the full 2.5gb transfer speed.

tower-diagnostics-20201215-1852.zip

[Italiandevil0505]

So I tried to see if it was maybe just a limit imposed by one file but transferring two at the same time cuts it in half instead of using the whole 2.5gb

[Italiandevil0505]

Oddly enough when two computers are accessing the network it saturates the full 2.5gb but either one of them alone does not. All of these have 2.5gb nics on a 2.5gb switch.

[JorgeB]

Run an iperf single stream test to check lan bandwidth.

[Italiandevil0505]

Hey thanks for the help. Here is the iperf test.

[JorgeB]

iperf looks OK, if you haven't yet try copying from a disk share instead of user share.

[Italiandevil0505]

27 minutes ago, JorgeB said:

iperf looks OK, if you haven't yet try copying from a disk share instead of user share.

I could be wrong but isn't that what I was doing in the first post?

[JorgeB]

By the screenshot I can't tell if that's a disk share or user share, you can name them whatever you want.

[saber1]

Do you know this Guide: SMB Performance Tuning

[JorgeB]

On second though pool names can't have spaces, so that must be a user share, try it on the disk share, you can enable disk shares on Settings -> Global Share Settings

[Italiandevil0505]

2 hours ago, JorgeB said:

On second though pool names can't have spaces, so that must be a user share, try it on the disk share, you can enable disk shares on Settings -> Global Share Settings

Tried copying from the disk share and got the same results. 129-130 MB/sec

 

3 hours ago, saber1 said:

Do you know this Guide: SMB Performance Tuning

I was checking out that guide and none of that seemed to work. The weird thing is, if I do a transfer from two separate computers I can saturate the full 2.5gb link on the server. However, if I do a transfer from just one desktop I am stuck at 129-130MB/sec.

 

[Italiandevil0505]

Well I think I figured it out. Must be a bug in the new 6.9 beta builds. I forgot I had updated to that. I was on Beta 30, updated all the way to RC1 and had the same issue. Reverted back to 6.8.3 and transfer speeds are flying now. How would I go about reporting this bug?

 

[digiblur]

On 12/17/2020 at 6:03 AM, Italiandevil0505 said:

Tried copying from the disk share and got the same results. 129-130 MB/sec

 

I was checking out that guide and none of that seemed to work. The weird thing is, if I do a transfer from two separate computers I can saturate the full 2.5gb link on the server. However, if I do a transfer from just one desktop I am stuck at 129-130MB/sec.

 

 

Were  you able to figure this out in the latest 6.9 stable releases?