samba - Jul 2006 - SOLVED - Oplocks not taking place at all unless fake oplocks = yes

The kernel on my server appears to be refusing oplocks altogether.  Setting
'kernel oplocks = no' resolved the issue.  Is there any caveats I should
be aware of?

- Chris Wagner

-----Original Message-----
From: samba-bounces+chriswagner=amyskitchen.net@lists.samba.org
[mailto:samba-bounces+chriswagner=amyskitchen.net@lists.samba.org]On
Behalf Of Chris Wagner
Sent: Wednesday, July 05, 2006 12:11 PM
To: samba@lists.samba.org
Subject: RE: [Samba] Oplocks not taking place at all unless fake oplocks
= yes- Update


I've modified the contention limit in attempt to troubleshoot this, thinking
that perhaps the client may be requesting multiple oplocks for whatever reason. 
The client is still not getting an oplock without specifying 'fake oplocks =
yes'.  I'm open to any ideas for troubleshooting.  I've also checked
to see if oplocks are explicitly disabled on the client, and they are not.  I do
experience this with more than one client as well, a Windows 2000 Professional
client, and a Windows XP Professional client (inside a VMWare session).

TIA
- Chris Wagner

-----Original Message-----
From: samba-bounces+chriswagner=amyskitchen.net@lists.samba.org
[mailto:samba-bounces+chriswagner=amyskitchen.net@lists.samba.org]On
Behalf Of Chris Wagner
Sent: Thursday, June 29, 2006 8:54 AM
To: samba@lists.samba.org
Subject: [Samba] Oplocks not taking place at all unless fake oplocks yes


Hi folks I'm running two Samba servers.  One is on Ubuntu 5.10
(samba-3.0.14a-6ubuntu1), the other is SuSE Linux Enterprise Server
(samba-3.0.20b-3.4).  The Ubuntu box is on my local network, and the
SLES box is across a WAN with an intervening WAFS appliance with TCP
acceleration.

Neither set-up seems to grant an oplock to the client unless I turn on
'fake oplocks'.  I've set 'oplocks = yes' and 'locking =
yes' explicitly
in my config file to no avail.

Obviously, 'fake oplocks' isn't something I want to turn on in a
production environment.  I'm looking for some help in narrowing down
where the problem lies.

Thanks in advance.

--
Christopher Wagner
Amy's Kitchen - http://www.amys.com/
chriswagner@amyskitchen.net
Sr. Systems Administrator

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On Wed, Jul 05, 2006 at 05:21:16PM -0700, Chris Wagner
wrote:
> The kernel on my server appears to be refusing oplocks altogether.  Setting
'kernel oplocks = no' resolved the issue.  Is there any caveats I should
be aware of?
If Linux processes (other than smbd) try and access
the files at the same time as Samba then without
kernel oplocks they may clash. If you don't have
simultaneous data access (ie. all client access is
via Samba) then there's nothing to worry about.

Jeremy.

The only thing that might clash is a backup agent running on the server, which
would be only reading the files.  That should be OK, right?

- Chris

-----Original Message-----
From: Jeremy Allison [mailto:jra@samba.org]
Sent: Wednesday, July 05, 2006 5:31 PM
To: Chris Wagner
Cc: samba@lists.samba.org
Subject: Re: [Samba] SOLVED - Oplocks not taking place at all unless
fake oplocks = yes


On Wed, Jul 05, 2006 at 05:21:16PM -0700, Chris Wagner
wrote:
> The kernel on my server appears to be refusing oplocks altogether.  Setting
'kernel oplocks = no' resolved the issue.  Is there any caveats I should
be aware of?
If Linux processes (other than smbd) try and access
the files at the same time as Samba then without
kernel oplocks they may clash. If you don't have
simultaneous data access (ie. all client access is
via Samba) then there's nothing to worry about.

Jeremy.