tree 5a2b90cad9fb5190ca158bb1e23783cb22067ff3
parent 5d0c16d93d700150d601f0ccd4ce660e3ea724d9
author buyingyi <buyingyi@gmail.com> 1374999076 -0700
committer buyingyi <buyingyi@gmail.com> 1374999076 -0700

let parititon constraint to be deterministic