Messages in this thread | | | Date | Thu, 1 Oct 1998 14:39:03 +0100 | From | "Stephen C. Tweedie" <> | Subject | Re: Building Big Ass Linux Machine, what are the limits? |
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Hi,
On Wed, 30 Sep 1998 07:42:43 -0400 (EDT), Alex Buell <alex.buell@tahallah.demon.co.uk> said:
> On Wed, 30 Sep 1998, Redvers Davies wrote: >> Another feature that we can perhaps learn from this excellent company >> is the "snapshot" function.
> This feature is actually quite cool - we at Raytheon use it during our > development to preserve tracking of changed files on our home directories.
> The downside is the increased amount of disk space. Why not use the > algorithm that cvs uses to keep the size of changed files down to the > minimum? I.e using deltas?
Because of the CPU cost. Such an expensive operation could only be justified for specific applications, but such applications can use one of the version-controlled NFS servers or CVS for that functionality. A general purpose filesystem has to be fast, fast, fast.
--Stephen
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