[OpenAFS] Crash testing OpenAFS
Jeffrey Altman
jaltman@secure-endpoints.com
Sun, 14 Aug 2005 08:27:46 -0400
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ted creedon wrote:
>>>This is possibly the case. A month or 2 ago I dragged the same directory
>
> from the 1.2.11 to a windows firewire drive using the Windows client and
> observed duplicate filename messages from the windows boxes.
Local Windows file systems are case-preserving but not case-sensitive.
If you copy a directory tree from AFS (which is case-sensitive) to a
local file system and the tree contains files that are different only
in the case of the characters:
1/31/2005 14:38 <DIR> foo
9/28/2004 8:22 <DIR> FOO
8/14/2005 8:21 0 FoO
8/14/2005 8:21 0 Foo
then you are going to run into collisions. The Windows OpenAFS client
will do its best to distinguish between these four entries by using a
case-sensitive first pattern matching followed by a case-insensitive
pattern matching if that fails. With the above four entries the client
will not allow any access to "fOO" or "foO" because the case-insensitive
match is ambiguous. This is usually not an issue when using Windows GUI
dialogs because the file name matchs are always case-sensitive.
> Jaltman mentioned that long filenames are not necessarily unique under
> AFS, however they are unique in my 1.2.11 AFS filesystem, I don't know about
> the 1.3.87 filesystem. I'll investigate.
That is not what I said. See above.
Jeffrey Altman
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