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Re: Structuring MapReduce Jobs - Hadoop - [mail # user]
...Hi : Well phrased question .... I think you will need to read up on reducers, and then you will see the light.  1) in your mapper, emit (date,tradeValue) objects.  2) Then hadoop w...
   Author: Jay Vyas, 2012-04-09, 16:52
[expand - 1 more] - Re: map task execution time - Hadoop - [mail # user]
...(excuse the typo in the last email : I meant "I've been playing with Cinch" , not "I've been with Cinch")....  On Thu, Apr 5, 2012 at 7:54 AM, Jay Vyas  wrote:     Jay Vy...
   Author: Jay Vyas, 2012-04-05, 13:02
cloudera vs apache hadoop migration stories ? - Hadoop - [mail # user]
...Seems like cloudera and standard apache-hadoop are really not cross compatible.  Things like MultipleInputs and stuff that we are finding don't work the same.  Any good (recent) wa...
   Author: Jay Vyas, 2012-04-04, 17:15
[expand - 2 more] - Re: org.apache.hadoop.ipc.RemoteException: org.apache.hadoop.hdfs.protocol.AlreadyBeingCreatedException:' - Hadoop - [mail # user]
...Thanks J : just curious about how you came to hypothesize (1) (i.e. regarding the fact that threads and the API componentns arent thread safe in my hadoop version).  I think thats a rea...
   Author: Jay Vyas, 2012-04-02, 15:24
[expand - 1 more] - Re: namespace error after formatting namenode (psuedo distr mode). - Hadoop - [mail # user]
...Hi guys : I'm trying to reset my hadoop psuedo-distributed setup on my local machine. I have formatted the namenode.  There are two ways to do this  -  Option 1) synchronize t...
   Author: Jay Vyas, 2012-03-31, 12:30
activity on IRC . - Hadoop - [mail # user]
...Hi guys : I notice the IRC activity is a little low.  Just wondering if theres a better chat channel for hadoop other than the official one (#hadoop on freenode)? In any case... Im on t...
   Author: Jay Vyas, 2012-03-28, 15:05
Re: simple hadoop psuedo distr. mode instructions - Hadoop - [mail # user]
...great thanks Jagat !  On Fri, Mar 23, 2012 at 1:42 AM, Jagat  wrote:     Jay Vyas MMSB/UCHC...
   Author: Jay Vyas, 2012-03-23, 06:59
Re: Very strange Java Collection behavior in Hadoop - Hadoop - [mail # user]
...Hi guys : What the latest, simplest, best directions to get a tiny, psuedodistributed hadoop setup running on my ubuntu machine ?  On Wed, Mar 21, 2012 at 5:14 PM,  wrote:   &...
   Author: Jay Vyas, 2012-03-23, 06:38
Re: Tasktracker fails - Hadoop - [mail # user]
...Hi guys !  Im trying to understand the way globstatus / deflate files work in hdfs.  I cant read them using the globStatus API in the hadoop FileSystem , from java.  the speci...
   Author: Jay Vyas, 2012-02-22, 18:29
Re: Question about accessing another HDFS - Hadoop - [mail # user]
...Can you show your code here ?  What URL protocol are you using ?  On Thu, Dec 8, 2011 at 5:47 PM, Tom Melendez  wrote:     Jay Vyas MMSB/UCHC...
   Author: Jay Vyas, 2011-12-08, 22:51
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB