Re: smb union mounts
Re: smb union mounts
- Subject: Re: smb union mounts
- From: Raleigh Rinehart <email@hidden>
- Date: Wed, 01 Dec 2010 15:32:12 +0000 (GMT)
On Nov 30, 2010, at 09:24 PM, Dan Shoop <email@hidden> wrote:
On Nov 29, 2010, at 6:20 AM, Quinn The Eskimo! wrote:
>
> On 27 Nov 2010, at 16:07, Raleigh Rinehart wrote:
>
>> I'm having a bit of a problem trying to union mount some smb shares.
>
> Mac OS X does not support union mounts well. The exact details are complex (too complex for me, apparently :-), but you can read all about it in this recent thread.
>
> <
http://lists.apple.com/archives/filesystem-dev/2010/Oct/msg00015.html>
FWIW, I've not had any real issues with union mounts in my usage, other than that it was listed they were no longer supported. (In the case of the man page it was implied it was a no-op and gone, yet clearly isn't.) That "support" seemed to center around that OX X Engineering doesn't seem to want to support it or suggest anyone use it. The details are apparently too complex to share or explain.
Quite frankly I find union mounts very useful and can't understand why it's being written off. It's a fundamental of many unices and other OSen. It's a shame.
-d
Hi All,
Thanks for all the input and pointers. I have finally sorted out the issues and got a working solution to my problem.
I did read the mentioned thread a couple of times, but it still wasn't clear to me what is or isn't supported. Of course now in hindsight it does make sense to me.
For the most part the union mounts do work well, just not quite as I expected. As was pointed out by Shantonu Sen they are not a recursive composition of two filesystem hierarchies, as a UnionFS is in other OSes.
Perhaps a little more documentation might be helpful for others who come across this with the same expectations as I had. All I found was the short paragraph in the mount man page and this list. There may already be more docs that my searching didn't turn up, in which case it'd be nice if those were made more visible.
I agree that a true union fs should be supported as a first class citizen in OS X. This is not the first time I've needed this functionality, and I'm sure it won't be the last time either. However, FWIW I have had some success with using MacFUSE and unionfs-fuse. There is one caveat, currently the "release" version of MacFUSE doesn't support 64bit Kernels; however there are some users who have gotten a working version ported. I wouldn't recommend this for anything that is perfomance or mission critical but for just serving up a few files through Apache or Tomcat for internal users it seems to work pretty well.
-raleigh
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Filesystem-dev mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden