Multichannel samba share?

[Ianm_ozzy]

Hi
I am looking to setup samba multichannel from the freeNAS machine to a linux machine.

Both have an intel quad nic installed.

I found this guide:

Setting up SMB 3 multichannel on FreeNAS

This guide has been written by someone who is NOT a certified expert. If any information is inaccurate or could be phrased better do share your thoughts in the discussion thread so I can update this document. A step by step guide to setting up...

www.ixsystems.com

So for context:
Whit the the health thing happening in the world it is impractica & prohibitably expensive to get 10 gigbit switches & nics.
Also obtaining getting a 16 port gigabit switch is very problematic.

My present switch has 8 port with 1 port free.


It seems the guide assumes all connections will go through a switch.

I want to have both the machines to connect to the switch as they are now.

The 3 spare on each machine i wish to connect directly to each other on the opposite machine.

Is this practical?

In the guide there is the standard network and another subnet so save addresses.

My guess is I will need 4 different subnets with static IPs setup on 3 nics on each adapter.

Is this practical?

Thanks.

 

[sretalla]

Most recent NICs will crossover automatically, so you can just connect them as you suggest and it should work the same as if the 2 machines were connected via a dedicated switch.

I haven't personally tried this, but from the guide, I would expect it to work.

 

[anodos]

Multichannel SMB is not currently a supported feature. There are edge cases that can result in data corruption. From the samba manpage:

Warning: Note that this feature is still considered experimental. Use it at your own risk: Even though it may seem to work well in testing, it may result in data corruption under some race conditions. Future releases may improve this situation.

 

[SweetAndLow]

I just set server multi channel support = yes in the conf file and call it good. Takes about 10sec to setup. I never bother with that subnets stuff.

 

[Ianm_ozzy]

So now I am even more confused before my post.
Does SMB multichannel work or not?

thanks

 

[SweetAndLow]

So now I am even more confused before my post.
Does SMB multichannel work or not?

thanks

Yes it does work, I use it every day. It's just an experimental feature like anodos mentioned.

 

[mstang1988]

I just set server multi channel support = yes in the conf file and call it good. Takes about 10sec to setup. I never bother with that subnets stuff.

I have tried to add it to my server but an error is always thrown. How are you adding it to your conf? I put in the Aux parameters:

server multi channel support = yes

 

[anodos]

I have tried to add it to my server but an error is always thrown. How are you adding it to your conf? I put in the Aux parameters:

The parameter is only valid if applied to the service (Services->SMB).

 

[anodos]

I have tried to add it to my server but an error is always thrown. How are you adding it to your conf? I put in the Aux parameters:

To re-iterate my previous comment on this thread:

Multichannel SMB is not currently a supported feature. There are edge cases that can result in data corruption. From the samba manpage:

Warning: Note that this feature is still considered experimental. Use it at your own risk: Even though it may seem to work well in testing, it may result in data corruption under some race conditions. Future releases may improve this situation.

 

[mstang1988]

To re-iterate my previous comment on this thread:

Multichannel SMB is not currently a supported feature. There are edge cases that can result in data corruption. From the samba manpage:

Yes, makes sense. I don't plan to use it in production but want some insight in the ROI I'll get once the corner cases are addressed.