Hi This looks like a 3-vertex DAG. It could be possibly be a linear DAG such as Map1 -> Map2 -> Reduce3 or a Join DAG where Map1 -> Reduce3 and Map2 -> Reduce3.
If you can get the application logs from YARN ( using bin/yarn logs -applicationId application_1404180111945_438880 ), you will be able to get a .dot file from the logs which will allow you to visualize the DAG using a tool like graphviz. As for the console output, 0/2 or 0/8 just implies the no. of completed vs total tasks for a given vertex. thanks — Hitesh On Jul 31, 2014, at 12:04 AM, igotux igotux <[email protected]> wrote: > Hello Everyone, > > Can someone help me explain what are the numbers next to Map 1 / Map 2 and > Reducer 3 . > > ~~~~~~~~~~~~~~~ > Status: Running (application id: application_1404180111945_438880) > > Map 1: -/- Map 2: -/- Reducer 3: 0/1 > Map 1: 0/2 Map 2: -/- Reducer 3: 0/1 > Map 1: 0/2 Map 2: 0/8 Reducer 3: 0/1 > Map 1: 0/2 Map 2: 0/8 Reducer 3: 0/1 > Map 1: 0/2 Map 2: 0/8 Reducer 3: 0/1 > Map 1: 1/2 Map 2: 0/8 Reducer 3: 0/1 > Map 1: 2/2 Map 2: 0/8 Reducer 3: 0/1 > Map 1: 2/2 Map 2: 2/8 Reducer 3: 0/1 > Map 1: 2/2 Map 2: 3/8 Reducer 3: 0/1 > Map 1: 2/2 Map 2: 4/8 Reducer 3: 0/1 > Map 1: 2/2 Map 2: 6/8 Reducer 3: 0/1 > Map 1: 2/2 Map 2: 8/8 Reducer 3: 0/1 > Map 1: 2/2 Map 2: 8/8 Reducer 3: 1/1 > Status: Finished successfully > OK > ~~~~~~~~~~~~~~~ > > The MR hive job runs with 16 mappers and one reducer.
