Help with windows smb file speeds

qbhatti

qbhatti

qbhatti

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Joined
4 Oct 2021
Posts
160
Location
Uk
Hi

I have I think a fairly simple setup.

Router: opnsense on forcepoint 1100 with 16gb ram-->Sfp+ dac --> tp link 10g switch

from here I have another sfp+ to my connectx3 card in my main pc (5900x/32gb ram/b550 mobo/1080ti)
and the whole house is connected into this ( 2 more switches, poe, going into this )

I have 1 Netgear wax630 and one wax615(the outdoor one but using it inside as I got a good price)

I never get more then 100mbps on windows file transfers between my PCs and I don't understand why.


the main pc:
-happily downloads at full gigabit internet
-happily pushes Plex untouched streams around the house and remotely.

other pc: laptop
-in the attic, around 6m away from the wax630 which sits in an airing cupboard in the attic; windows says 1200mbps connection.
-can happily download from internet at 800mbps.


I have enabled jumbo frames on the main pc, I have used the mellanox optimiser and tried each of the settings.

I kinda had enough last night and managed to.stumble upon iperf on my router.
it gets max 4.3gbps from server to router.


What can be wrong.
 
Avalon said:
What you have said isn’t an SMB issue, it’s a network issue and slow SMB is merely a symptom of the actual issue.

My out of the box iperf3 numbers doing SFP+ to switch and then SFP+ router or another 10Gb SFP+ server are 7.1Gb/s, that’s 100% vanilla, no jumbo frames or tweaks applied, but non of them run windows. Obviously iperf isn’t using SMB in either case, so investigate PC to router, determine what’s going on between them first as either your tweaks are causing detrimental results or a driver/cable issue. Try a live version of Ubuntu to rule out win/driver issues? I don’t use CX3’s that often and never under Windows (Linux/BSD with x520 and Myricom are my weapons of choice), but those that do rate them and rarely seem to have issues.

Also if your other PC’s are connected via gigabit class connections to your 10Gb PC, then you’ll only ever get gigabit on them, also gigabit = 110MB/s ish on an efficient protocol/transfer (can’t comment on SMB, but they added multiple streams to try and improve it).
Click to expand...
Thanks for the response.
I have already ordered a mellanox compatible dac...let's see if it makes a difference.
I'm only really looking to get gigabit anyways but I'm struggling with that
 
stooeh said:
Are you saying you only get ~10MB/sec file transfers over SMB?
I have 2xPCs with 2.5Gbit ports and a large file will transfer at maybe 283MB/sec - if its a folder with many snall files speeds will fluctuate wildly but not 10MB/sec bed :p
Click to expand...
Yes
That's what I mean.
Both PCs will download from internet at full 1Gigabit so I know their connections are fine and for some reason it looks like smb is limited itself to 100megabit
 
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