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Re: CompositeInputFormat - MapReduce - [mail # user]
...Map Side joins will use the CompositeInputFormat.  They will only really be worth doing if one data set is small, and the other is large.  This is a good example : http://www.congi...
   Author: Jay Vyas, 2013-07-11, 21:10
Data node EPERM not permitted. - MapReduce - [mail # user]
...Hi :  I've mounted my own ext4 disk ont /mnt/sdb and chmodded it to 777.  However, when starting the data node:  /etc/init.d/hadoop-hdfs-datanode start  I get the followi...
   Author: Jay Vyas, 2013-07-06, 16:07
starting Hadoop, the "new" way - MapReduce - [mail # user]
...Hi :  Is there a "hadoop 2.0 tutorial for 1.0 people" ?  Im used to running start-all.sh , but it appears that the new MR2 version of hadoop is much more sophisticated.  In an...
   Author: Jay Vyas, 2013-07-05, 23:39
Re: copyToLocal Failed inside the cleanup(.........) of Map task - MapReduce - [mail # user]
...Just for context and so that we can understand the question --- why are you needing to copy intermediate mapper output?  On Jun 3, 2013, at 4:11 PM, samir das mohapatra  wrote: &nb...
   Author: Jay Vyas, 2013-06-03, 22:05
[expand - 1 more] - Re: Configuring SSH - is it required? for a psedo distriburted mode? - MapReduce - [mail # user]
...Actually, I should amend my statement -- SSH is required, but passwordless ssh (i guess) you can live without if you are willing to enter your password for each process that gets started. &n...
   Author: Jay Vyas, 2013-05-16, 15:34
[expand - 1 more] - Re: partition as block? - MapReduce - [mail # user]
...What do you mean "increasing the size"?  Im talking more about increasing the number of partitions... Which actually decreases individual file size.  On Apr 30, 2013, at 4:09 PM, M...
   Author: Jay Vyas, 2013-05-01, 00:00
Re: Maven dependency - MapReduce - [mail # user]
...this should be enough to get started (you can pick the 1.* version if you want the newer APIs and stuff, but for the elephant book, the older apis will work fine as well) .     &nb...
   Author: Jay Vyas, 2013-04-24, 19:25
ConfigKeys wrappers for MapReduce source code base - MapReduce - [mail # dev]
...Hi guys:  A breif check wiht "find ./ -name *ConfigKeys*" doesn't seem to indicate that there is a "MapRedConfigKeys" class... Should there be one to help get rid of magic numbers and u...
   Author: Jay Vyas, 2013-04-21, 19:29
[expand - 2 more] - Re: JobConf and MiniMapRedCluster - MapReduce - [mail # dev]
...Okay, thanks.... Ill look into this JIRA .  it is clear from some light googling that, at some point  ** some version of JobConf was deprecated, and that maybe again it was undepre...
   Author: Jay Vyas, 2013-04-18, 05:55
Fwd: JobConf and MiniMapRedCluster - MapReduce - [mail # user]
...Hi guys: Forwarded this here because it might be more relevant to a broad community of hadoop users interested in doing more than just MRUnit for tests.  From: Jay Vyas  Date: Wed,...
   Author: Jay Vyas, 2013-04-17, 19:44
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