SQL backend: prototype

Hi all,

I have been worked on SQL backend prototype within my diploma's thesis
during last months. I've discussed the design here and finished the
implementation recently. Currently, the prototype is able to commit
files/dirs, but it crashes time to time without a known reason.

I have compared the MySQL backend with BDB and FSFS (according
performance). The results and the implementation are able here:
http://www.stud.fit.vutbr.cz/~xhorak50/diplomathesis/
(100516_svn_all.zip and 100516_svn_sql_backend.pdf). The backend is
prepared to be envolved and I think it could be ready-to-operate backend
after some optimization steps and some features development.

Unfortunately, I cannot continue in the work any more, because of my
workload, so I'm posting my results here. If any resource will not be
valid in the future, you can contact me on my e-mail.

-- 
With Best Regards
Jan Horák
E-mail: horak.honza_at_gmail.com