On Tue, 5 May 2009 18:46:19 +0200, Jörn Engel wrote:
>
> And depending on the fs design, the read/write loop can be
> replaced with finer-grained reference counting.
And maybe finer-grained reference counting should be a requirement for
copyfile/cowlink/reflink or whatever we call it. With a large file on
slow media, open("foo", O_RDWR); should still return in a reasonable
amount of time. Not after ten minutes.
Jörn
--
Fancy algorithms are slow when n is small, and n is usually small.
Fancy algorithms have big constants. Until you know that n is
frequently going to be big, don't get fancy.
-- Rob Pike
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