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From "Thomas Mueller" <thomas.tom.muel...@gmail.com>
Subject Re: Next Generation Persistence
Date Fri, 15 Jun 2007 09:13:45 GMT

> Making the repository more "Subversion-like" by implementing some form
> of cheap/fast workspace cloning, and cheap/fast tagging of versions,
> might help a lot for some types of applications.

Lets 90% of the storage space used in a repository are large objects
(binary data). With GlobalDataStore, cloning (and versioning) should
get 9 times faster (and use much less storage space).

On the other hand, it is better to copy short strings, instead of
saving them only once and keeping a reference, because of the
overhead, and because the potential saving is small. An exception is
cloning whole (node) subtrees. Here, copy-on-write would help.


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