sig
val main : Mapred_def.mapred_job -> unit
val exec_job : Mapred_def.mapred_env -> Mapred_def.mapred_job -> unit
type spec =
string * string * (Mapred_def.mapred_env -> Mapred_def.mapred_job) *
(Mapred_def.mapred_env -> Mapred_def.mapred_job -> unit)
val dispatch : Mapred_main.spec list -> unit
end
