Samba 4.12 Released With Performance Improvements, IO_uring Support

[phoronix]

Phoronix: Samba 4.12 Released With Performance Improvements, IO_uring Support

Samba 4.12 is out this week as a big update to this prominent SMB/CIFS implementation for file exchange and printer sharing predominantly with Microsoft Windows systems...

http://www.phoronix.com/scan.php?page=news_item&px=Samba-4.12-Released

[tildearrow]

In before somebody asks about software using IO_uring:
- Samba
- Possibly other 150 applications (liburing has 150 stars, assuming they all have used the library in some way or the other)

[jonesmz]

Can you add a link to the relevant mailing post to the article?

[Danny3]

I assume this would be too late for Ubuntu 20.04 too...
I wonder if this will help me achieve the maximum speed on transferring files between two computers similar to Windows 7 at around 110 MB/s on a direct gigabit connection.

[kcrudup]

In before somebody asks about software using IO_uring:

... good to know. I'm pretty sure nothing in my distro is using it yet, but I'd pulled it from my kernel as I thought it had only Enterprise use-cases.

[ermo]

I assume this would be too late for Ubuntu 20.04 too...
I wonder if this will help me achieve the maximum speed on transferring files between two computers similar to Windows 7 at around 110 MB/s on a direct gigabit connection.

In my experience, that's been easy achieve for a while as long as you mount shares via the kernel cifs module.

Last I checked, the kernel module wasn't fully SMB-3.1.1 capable (it was stuck at SMB-3.0 I believe; this may have changed in the meantime).

[coder]

There's a very nice writeup of io_uring, here: https://kernel.dk/io_uring.pdf

This is a good development. I once tried the posix aio interface and it indeed sucked. And Linus has long (always?) discouraged usage of & support for O_DIRECT, meaning the kernel's native aio interface isn't always available and comes with significant caveats.

I'm looking forward to giving io_uring a whirl, when I get a chance.

[Danny3]

In my experience, that's been easy achieve for a while as long as you mount shares via the kernel cifs module.

Last I checked, the kernel module wasn't fully SMB-3.1.1 capable (it was stuck at SMB-3.0 I believe; this may have changed in the meatime).

Well, I definitely don't know how to do that.
I'll probably stick to Windows 7 when I need to do that.

[ermo]

Well, I definitely don't know how to do that.
I'll probably stick to Windows 7 when I need to do that.

man 8 mount.cifs

According to https://wiki.samba.org/index.php/LinuxCIFSKernel , SMB-3.1.1 has been supported when using the linux kernel cifs module via mount.cifs since linux-5.0.