On 2010-06-21 07:15, Linda W wrote:
Bartosz Stec wrote:
Hello list
On my server almost half of files are duplicated, and there are
almost 100GB of data which is growing fast. I'm using weekly script
to find duplicated files and replace them with hardlinks. Everything
is fine as long as users aren't trying to edit and save some
documents which have hardlinks. With samba 3.3 it seems that
hardlinks aren't unlinked before file is saved.
Is there any way to force samba to unlink file before write?
---
Wouldn't that be a function of the application program?
Some applications do similar to that -- like a rename & create (where
the old file will be around as a backup). But some applications may try
to modify the file in-place. It depends on the application.
You might be able to force the issue by changing the
permissions/ownership on the linux server to a '3rd party' login and
set other permissions to read-only. Then anyone who wants to write
would have to delete the copy that is there (or rename it).
I think you'r missing a point. Windows apps don't realise there is even
such thing like hard link. For instance someone simply open MS Excel
spreasheet, edit and save it on network share. This xls file could have
one or more hardlink, but it is now ignored at all. SAMBA is in fact a
layer between Unix filesystem and Windows clients and programs, so the
way which I/O operations and checks on filesystem is performed are
strictly samba related AFAIK. Older versions seems to behave like I want
it to according to:
http://lists-archives.org/samba/53311-smbd-not-breaking-hard-links-when-saving-files.html
http://groups.google.com/group/mailing.unix.samba/browse_thread/thread/8a593099a36f43eb
Unfortunately there was no straight answer, so I started another thread :)
--
Bartosz Stec
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