This is really interesting in the context of partial replications,
which may occur either explicitly or implicitly as result of security
considerations: http://www.usenix.org/event/nsdi06/tech/full_papers/belaramani/belaramani_html
Antony Blakey
-------------
CTO, Linkuistics Pty Ltd
Ph: 0438 840 787
A reasonable man adapts himself to suit his environment. An
unreasonable man persists in attempting to adapt his environment to
suit himself. Therefore, all progress depends on the unreasonable man.
-- George Bernard Shaw