The MapReduce ApplicationMaster supports only one job. You can say that (YARN ResourceManager + a bunch of MR ApplicationMasters (one per job) = JobTracker).
Tez does have a notion of multiple DAGs per YARN app. For your specific use-case, you can force that user to a queue and limit how much he/she can access. Thanks +Vinod On Apr 27, 2015, at 3:30 PM, Yang <teddyyyy...@gmail.com> wrote: > conceptually, the MR application master is similar to the old job tracker. > > if so, can I submit multiple jobs to the same MR application master? it > looks like an odd use case, the context is that we have users generating lots > of MR jobs, and he currently has a little crude scheduler that periodically > launches jobs to the RM by just "hadoop jar ..." > > instead I was thinking to "carve out" a MR2 allocation in RM first, then > periodically submit to the "job tracker"/application master, so that all the > jobs are localized to this allocation. > > > I was also thinking about using Tez instead of MR application master. Tez > replaces MR2 application master, not on top of it, right? > > Thanks > Yang
