Tim Daneliuk wrote:
> The other day I mentioned I had a problem with a Samba-shared drive that
> was just installed blowing up. When I rebuilt it, I forgot to enable
> softupdates but the drive seems to be working flawlessly. I understand
> it is possible to do this after-the-fact with tunefs. Some questions:
>
> Do I have to unmount the drive to do it?
> What benefit will I get if I turn on softupdates?
>
> This drive is being used as a backup drive for all the workstations on
> this particular network, and "reliable" is much more important than "
> slightly faster".
As per man tunefs:
"The tunefs utility cannot be run on an active file system. To change an
active file system, it must be downgraded to read-only or unmounted."
The benefit is not just speed, but better concurrent multi-user throughput.
Operations which would block other I/O "finish" sooner so the next task can
begin without waiting.
I actually run mine with aio_load="YES" in loader.conf in conjunction with
the following in smb.conf:
aio read size = 16384
aio write size = 16384
aio write behind = true
block size = 16384
use sendfile = Yes
Minor performance tweaks aside, should you continue to see the error(s)
described in the other mail I sincerely suspect softupdates is not the
culprit.
-Mike
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