----- Regards, Thulasi Ram P
---------- Forwarded message ---------- From: Thulasi Ram Naidu Peddineni <[email protected]> Date: Tue, Sep 27, 2011 at 11:21 PM Subject: Reg: Map joins in hive To: [email protected], [email protected] Hi, I have a huge table x (~150M records and ~5GB) with one partition and another table (~200 records and <10KB). I want to join both these tables and thought MapJoin is perfect optimization for this. However, my job log says.. Total MapReduce jobs = 2 ... ... Mapred Local Task Succeeded . Convert the Join into MapJoin Launching Job 1 out of 2 Number of reduce tasks is set to 0 since there's no reduce operator and then it is stuck at this point of time for a long time. Can you some explain what could be happening here ? ----- Thanks, Thulasi Ram P
