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Re: Multi-stage map/reduce jobs - MapReduce - [mail # user]
...Hadoop is not an API for orchestrating mapreduce jobs- fortunately, there is no need for such an API.  Each mapreduce job can simple be run like a normal java class.  So, to run mu...
   Author: Jay Vyas, 2012-11-23, 22:50
Re: Optimizing Disk I/O - does HDFS do anything ? - MapReduce - [mail # user]
...hmmm...  1) but I thought that this sort of thing (yes even on linux) becomes important when you have large amounts of data - because the way files are written can cause issues on highl...
   Author: Jay Vyas, 2012-11-13, 21:40
Re: mapred.tasktracker.map.tasks.maximum - MapReduce - [mail # user]
...Hmmm What do you mean wrong configuration file.?   How could that ever happen?  Jay Vyas   On Nov 13, 2012, at 10:25 AM, Mark Kerzner  wrote:  ...
   Author: Jay Vyas, 2012-11-13, 15:27
Re: Can dynamic Classes be accessible to Mappers/Reducers? - MapReduce - [mail # user]
...Wow that's an awesome trick.! Okay thanks.  Jay Vyas  MMSB UCHC  On Nov 13, 2012, at 3:56 AM, Bertrand Dechoux  wrote:  ...
   Author: Jay Vyas, 2012-11-13, 11:50
Re: mr unit pom file - MapReduce - [mail # user]
...Yup, your right the mrunit pom file is specified here:  https://cwiki.apache.org/confluence/display/MRUNIT/Index%3bjsessionid=C4B0ADDF6B88BBEFCF60136A62441A12  too bad that it need...
   Author: Jay Vyas, 2012-11-09, 20:42
Re: hadoop - running examples - MapReduce - [mail # user]
...What do you mean immutable? Do u mean non modifiable maybe .?  Immutable implies that they can't be deleted .  Jay Vyas  MMSB UCHC  On Nov 8, 2012, at 5:28 PM, Mohammad T...
   Author: Jay Vyas, 2012-11-08, 22:31
Re: Hadoop processing - MapReduce - [mail # user]
...Hmm this is interesting.  I think that:  1) For the map phases, hadoop is smart enough to try to run mappers locally, but i think you could force these DNs to actively participate ...
   Author: Jay Vyas, 2012-11-08, 14:49
Re: backup of hdfs data - MapReduce - [mail # user]
...Amazon has a really cheap, large scale backup solution called glacier which is good if your just backing up for the sake of archival in emergencies. If you need the archival to be performant...
   Author: Jay Vyas, 2012-11-06, 01:21
Re: Interview questions.. - MapReduce - [mail # user]
...Hive: Know SQL internals - how joins work, data structures and disk algorithms, etc.. And how those would be implemented in MapReduce.  Know what a projection, aggregation, etc.. is. Ha...
   Author: Jay Vyas, 2012-10-26, 09:16
Re: Subscription to the mailing list - MapReduce - [mail # user]
...I would simply use "Stackoverflow" for this sort of engagement.  A mailing list is designed larely to include the whole user community in the global conversation.  On Mon, Oct 22, ...
   Author: Jay Vyas, 2012-10-22, 18:15
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