[Samba] IIS Change Notifications

Gareth Evans agrath at gmail.com
Thu Jan 13 14:11:55 MST 2011

sorry, accidentally hit reply instead of reply all

On Fri, Jan 14, 2011 at 10:05 AM, Gareth Evans <agrath at gmail.com> wrote:

> Okay I guess the recursive thing makes sense, I hope IIS establishes
> watches on the specific directories it's interested in.
> The tree could indeed be very deep.
> I guess the only way to know is to test with it once I can repeat the same
> operations as you and get the same output.
> I don't know what i'm doing differently, but it certainly didn't detect the
> move/copy/modify operations when I tested it.
> Would the local server filesystem make a difference? I doubt it, but worth
> asking
> There has to be something different between our two tests, there can't be
> anything I'm doing wrong specifically that causes it to not work, it's a
> pretty simple test.
> I was definitely making the changes in the directory that I had the
> notify/watch established for
> Do you see the 'client only requested 32 bytes marshalling 58 (?) bytes'
> message in your log output? I always saw that error when I was testing and
> it didn't work.
> From reading the source, that error is generated immediately before a
> return false from the notify response.
> How long is your UNC path? Mine was a reasonable length:
> That's 52 bytes by itself, plus a filename could be where that ~58 bytes
> number came from
> \\smbtest\mwh-webstore\clientname\site.co.nz\htdocs
> I think that if I triggered the changes from a samba share that it was
> handled correctly, but the changes on the shell didn't.
> I'd need to test this specific scenario to confirm if this was the case.
> In our scenario, our FTP servers are modifying files via a mounted NFS
> share, or things are changed directly on the console (e.g. unzipping an
> archive of site files)
> I'm at the office right now, and my test ubuntu server with 3.5.6 is on it
> is at home - I can go there if you need more testing info or want me to try
> specific scenarios.
> Gareth
> On Fri, Jan 14, 2011 at 9:55 AM, Volker Lendecke <
> Volker.Lendecke at sernet.de> wrote:
>> On Fri, Jan 14, 2011 at 09:39:13AM +1300, Gareth Evans wrote:
>> > Looks like you're using a mapped drive letter rather than a UNC path
>> -that
>> > could be contributing.
>> Yes. Just tried with a UNC path. Same result.
>> > It sounds like what you're doing to test is fairly equivilent to what I
>> was
>> > doing but in this case, i'm seeing what I would have expected to see in
>> my
>> > testing.
>> >
>> > What OS is your client machine? XP? Win7?
>> Win7 for this test.
>> > If a smb client requests a recursive watch, such as IIS would (because
>> it
>> > would register the notify on the root folder and expect to be told if
>> > something in bin subfolder changes) does samba register notifications in
>> a
>> > recursive way (i.e. subfolders)
>> It does internally. This means that we get recursive change
>> notifies that are triggered via other CIFS clients.
>> For example the
>> File: z:\mput\file00000168.exe Deleted
>> from my last message was triggered by smbclient connected to
>> the same share. Doing a "rm /data/tmp/mput/xxx" on the Linux
>> server shell would not have triggered it.
>> We do not get recursive changes triggered by local Unix
>> clients. Given the non-recursive nature of the inotify API,
>> his would be potentially prohibitively expensive. We might
>> have to walk a directory tree arbitrarily large.
>> With best regards,
>> Volker Lendecke
>> --
>> SerNet GmbH, Bahnhofsallee 1b, 37081 Göttingen
>> phone: +49-551-370000-0, fax: +49-551-370000-9
>> AG Göttingen, HRB 2816, GF: Dr. Johannes Loxen

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