Svn FSFS

• Svn has two backends: a berkeley db and fsfs

• Fsfs is the scalable option which works over NFS

• In this case NFS doesn't have to be a dirty word :)

• 1 file per revision (not per file in the repository)

• Skip-deltas avoid rebuilding files back to rev 1

• New revision built in local transaction and renamed to last revision

• Lock time is very short, low contention (db/write-lock before updating db/current)