Matthew Ahrens <[EMAIL PROTECTED]> wrote:
> Joerg Schilling wrote:
> > The best documented one is the inverted meta data tree that allows wofs to
> > write
> > only one new generation node for one modified file while ZFS needs to also
> > write new
> > nodes for all directories above the file including the root directory in
> > the fs.
>
> I believe you are thinking of indirect blocks, which are unrelated to the
> directory tree. In ZFS and most other filesystems, ancestor directories need
> not be modified when a file in a directory is modified.
Isn't this against what I've read?
If you write inode data to a different location than before, you need a way to
tell the ancestor directory where the new data is located.
>From what I've read so far and what I have in mind from a personal talk with
Jeff Bonwick in September 2004, this is done by rewriting at least parts of the
ancestor directory inode.
Jörg
--
EMail:[EMAIL PROTECTED] (home) Jörg Schilling D-13353 Berlin
[EMAIL PROTECTED] (uni)
[EMAIL PROTECTED] (work) Blog: http://schily.blogspot.com/
URL: http://cdrecord.berlios.de/old/private/ ftp://ftp.berlios.de/pub/schily
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