Re: Slow SMB performance over GVFS

[Ross Lagerwall <rosslagerwall gmail com>]

On Sun, Oct 06, 2013 at 05:39:45PM +1100, Will Rouesnel wrote:
> Copying with Windows 7 to my Ubuntu 13.04 file server running ZFS, I can
> achieve upwards of 80mb/s transfer speeds, with a minimum of maybe 60
> mb/s on a bad day (this is with a couple of large files).
>
> Doing the same operation with GVFS, I'm lucky to clear 20 mb/s (27-28 is
> the highest I've seen).
>
> Doing the same operation with rsync -W and the GVFS mounts, I get no
> more then 1mb/s (Same with dd).
>
> Doing the same operation with rsync over ssh, I get ~50 mb/s.
>
> If I run the same operation a few times (to account for a warmed cache),
> rsync -W (i.e. no deltas) leaps to 100 mb/s (line-speed essentially),
> while GVFS Samba will chug at about 50 mb/s.

So rsync over ssh goes from 50MB/s to 100MB/s and GVFS over Samba goes
from 20MB/s to 100MB/s?
What happens if you use smbclient or a CIFS mount?

> This to me seems like a ridiculous state of affairs on the desktop. I'd
> really love to know where to look to either tweak things for improved
> speed or to help debug this issue.
>
> While technically I can plan my file operations to work around GVFS, it
> really shouldn't be when in Windows I can point an application at a
> network share and expect things to work out fine (thus the point of me
> having a fileserver) whereas currently on my desktop I have to dance
> around mounting and unmounting things and hoping it'll work out.

This is a known issue (which doesn't make it any better). See:
https://bugzilla.gnome.org/show_bug.cgi?id=652540
https://bugzilla.gnome.org/show_bug.cgi?id=532951

-- 
Ross Lagerwall