Problem regarding hardlink when clone from linux and commit from windows

Thu Oct 21 15:47:23 UTC 2010

On Thu, Oct 21, 2010 at 10:41 AM, Jerome Allasia <jerome.allasia at amadeus.com
> wrote:

> Hi,
>
> Thank you for the fast response ;-)
> "mapping the linux drive on V:" => we are using a NAS system : mount with
> NFS on linux box, and using CIFS for windows => *
> http://en.wikipedia.org/wiki/Network-attached_storage*<http://en.wikipedia.org/wiki/Network-attached_storage>
>
> > As a workaround you can use "hg clone -U" or simply "cp -ar" instead.
> > hg clone --pull
>
> we are going to use this kind of solution. It's sad not to be able to use
> Hardlinks ... it would have been really nice for us ... anyway i will have a
> look also on my side "inside" to see if i can find a solution for that.
>
> > What does that comment mean? Are you or are you not using 1.6.4? Can you
> > post the output of "V:\HardlinkTEST\cloneRef>hg version"?
>
> V:\HardlinkTEST\cloneRef>hg version
> Mercurial Distributed SCM (version 1.6.1023)
>

See "Nightly build version numbers" in
http://bitbucket.org/tortoisehg/thg-winbuild/wiki/Home.  1.6.1023 is 23
stable branch changesets past 1.6.  You don't have 1.6.3.

> Copyright (C) 2005-2010 Matt Mackall <mpm at selenic.com> and others
> This is free software; see the source for copying conditions. There is NO
> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>
> > For issue761, there should be workaround released with 1.6.3. in effect.
> > But that applies to Windows shares only.
>
> Do you think that we can extends/activate that fix on demand (having an
> option to the commit to force it to consider all files as hardlinks) ?
>
>
>
>  *Adrian Buehlmann <adrian at cadifra.com>*
> To
> Jerome Allasia <jerome.allasia at amadeus.com>
> cc
> mercurial at selenic.com
> Subject
> Re: Problem regarding hardlink when clone from linux and commit from
> windows
>
>  *Adrian Buehlmann <adrian at cadifra.com>*
>
> 21/10/2010 17:18
>
>
>
> On 21.10.2010 15:54, Jerome Allasia wrote:
> >
> > Hi,
> >
> > The problem is the following (i have read
> >
> http://mercurial.selenic.com/wiki/HardlinkedClones#Hardlinked_clones_on_Windows_shares
> ,
> > but it seams that the problem still exist ...)
> >
> >     * I have a repository call "ref", first i clone it to cloneRef (cmd
> >       run on the linux machine, on a linux terminal)
>
> This will create a so called "hardlinked clone" as described on that
> wiki page.
>
> > jallasia at ncegcolnx123:~/HardlinkTEST) hg clone ref cloneRef
> >
> > /jallasia at ncegcolnx123:~/HardlinkTEST) ll
> >                                                    1:03PM/
> > /total 16/
> > /drwxr-xr-x 3 jallasia dev_air 1024 Oct 21 11:17 cloneRef/
> > /drwxr-xr-x 3 jallasia dev_air 1024 Oct 20 12:24 ref/
> >
> >     * I modify a file call "test.txt" inside cloneRef
> >     * On windows i perform a commit : (run on windows, mapping the linux
> >       drive on V: using mercurial v1.6.4)
>
> Re: "mapping the linux drive on V:"
>
> How is that done? Are you running a Samba server, and then sharing the
> files like a Windows share, accessing it from Windows as clients?
>
> Or?
>
> > V:\HardlinkTEST\cloneRef>hg commit
> >
> >     * the result it that both repository are modified !!!
>
> Which is wrong and a strong sign that hardlinks are not broken up by the
> commit. Which may be caused by mercurial getting told a wrong hardlink
> count when it asks for the number of hardlinks for a file.
>
> > jallasia at ncegcolnx123:~/HardlinkTEST) ll cloneRef/.hg/store/data
> > ref/.hg/store/data                                       1:09PM
> > cloneRef/.hg/store/data:
> > total 8
> > -rw-r--r-- 2 jallasia dev_air 223 Oct 21 11:17 test.txt.i
> >
> > ref/.hg/store/data:
> > total 8
> > -rw-r--r-- 2 jallasia dev_air 223 Oct 21 11:17 test.txt.i
> >
> > (I have install the version 1.6.4 on windows to perform that ...)
> >
> > Do you have a solution for me ????
>
> Not until we know more. See my question above. You might get faster,
> interactive response on IRC channel #mercurial (my nick is abuehl if I'm
> on the channel).
>
> BTW 'hg clone --pull' will create clones that have no hardlinks. But
> there is no reliable way to enforce that.
>
> > (THIS PROBLEM IS REALLY A SHOW STOPER ! AN WE HAVE POTENTIALLY HUNDREDS
> > OF DEVELOPPER IN OUR COMPANIE THAT ARE OR WILL USE IT OR MIGRATE TO
> > ANOTHER SOLUTION)
>
> No need to use BIG CAPS. There are quite a number of volunteer people on
> the mercurial project, helping out unpaid in their free time. Screaming
> at us isn't going to be helpful in any way.
>
> The problem reports we had so far regarding problems with hardlinks:
>
> * http://mercurial.selenic.com/bts/issue761
> * http://mercurial.selenic.com/bts/issue1866
>
> None of which were caused by bugs in mercurial itself (either windows
> failing to report the hardlink count or a Linux driver having similar
> problems).
>
> For issue761, there should be workaround released with 1.6.3. in effect.
> But that applies to Windows shares only.
>
>
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>
>

-- 
Steve Borho
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