HFS+ support (read-only)

Timothy A. Seufert tas at mindspring.com
Sat Jun 8 05:16:31 EST 2002

At 11:25 PM -0800 6/6/02, Ethan Benson wrote:
>On Thu, Jun 06, 2002 at 03:50:31PM -0700, Timothy A. Seufert wrote:
>>  The OS needs
>>  a database of all files that are hardlinked, with full reverse
>>  mappings, so that whenever a file with hardlinks is unlinked it has
>>  enough information to replace one of the hardlinks with the real file.
>i don't know about that, maybe.  to be honest it would not surprise me
>if apple just let that break.

Oh, come on.  :)  I just tested it, they didn't let it break.

>>  (For efficiency I'd want a flag bit in the metadata of each file to
>>  indicate that it has been hardlinked, to avoid searching the table
>>  when deleting files that have no hardlinks.  For even more
>>  efficiency, a direct pointer to the table entry.)
>you cannot use the word efficient to describe this puke inducing
>kludge.  the efficient way is to design the filesystem properly to
>begin with, which apple did not do with HFS+.

The kludge part is trying to retrofit features like hardlinks into a
FS which wasn't designed to naturally support them (as classic UNIX
inode FS designs do).  Aside from that I see nothing wrong with the
basic design of HFS+.

Tim Seufert

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