Re: reiser4 plugins

[Jonathan Briggs <jbriggs@esoft.com>]

On Wed, 2005-07-06 at 15:51 -0400, Hubert Chan wrote:
> On Wed, 06 Jul 2005 12:52:23 -0600, Jonathan Briggs <jbriggs@esoft.com> said:
[snip]
> > It still has the performance and locking problem of having to update
> > every child file when moving a directory tree to a new parent.  On the
> > other hand, maybe the benefit is worth the cost.
> 
> Every node should store the inode number(s) for its parent(s).  Not the
> path name.  So you don't need to do any updates, since when you move a
> tree, inode numbers don't change.

You do need the updates if you change what inode is the parent.

/a/b/c, /a/b/d, /a/b/e, /b
mv /a/b /b
Now you have to change the stored grand-parent inodes for /a/b/c, /a/b/d
and /a/b/e so that they reference /b/b instead of /a/b.
-- 
Jonathan Briggs <jbriggs@esoft.com>
eSoft, Inc.

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