Hi, That decision would be made by Hive, not Trafodion. For people who use install_local_hadoop, we recently changed that setup to use local MapReduce, not YARN, see https://issues.apache.org/jira/browse/TRAFODION-1781.
Hans On Tue, Feb 2, 2016 at 12:58 PM, Gunnar Tapper <[email protected]> wrote: > Hi Suresh: > > Thanks for the information. > > Given from what you write, it seems that YARN with MRv2 is required for > full functionality. > > MRv1 is a separate install in current distributions, which is why I am > asking about it. How does Trafodion decide to run the MapReduce job as MRv1 > vs. MRv2 if both are installed? > > Thanks, > > Gunnar > > > > On Tue, Feb 2, 2016 at 1:50 PM, Suresh Subbiah <[email protected] > > wrote: > >> Hi, >> >> I don't think Trafodion requires YARN for most activity. >> >> For Hive table access, Trafodion uses Hive metadata access Java API and >> libhdfs to actually scan the data file. Therefore YARN is not needed for >> Hive access. >> YARN is not needed for native Hbase or Trafodion table access too. >> YARN is needed for backup/restore, since the HBase exportSnapshot class >> Trafodion calls, used MapReduce to copy large snapshot files to/from the >> backup location. >> YARN is also needed for developer regressions as some vanilla Hive >> commands are executed during the regression run. >> For the last 2 lines I think both MRv1 and MRv2 is supported. >> >> Thanks >> Suresh >> >> >> On Tue, Feb 2, 2016 at 2:36 PM, Gunnar Tapper <[email protected]> >> wrote: >> >>> Hi, >>> >>> Does Trafodion require YARN with MRv2 or is MRv1 supported, too? >>> >>> -- >>> Thanks, >>> >>> Gunnar >>> *If you think you can you can, if you think you can't you're right.* >>> >> >> > > > -- > Thanks, > > Gunnar > *If you think you can you can, if you think you can't you're right.* >
