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Re: Help with adjusting Hadoop configuration files - Hadoop - [mail # user]
...Yeah it will increase performance by reducing number of mappers and making single mapper to use more memory . So the value depends upon the application and RAM available . For your use case ...
   Author: madhu phatak, 2011-06-21, 11:02
Re: Append to Existing File - Hadoop - [mail # user]
...Please refer to this discussion http://search-hadoop.com/m/rnG0h1zCZcL1/Re%253A+HDFS+File+Appending+URGENT&subj=Fw+HDFS+File+Appending+URGENT  On Tue, Jun 21, 2011 at 4:23 PM, Eric Char...
   Author: madhu phatak, 2011-06-21, 10:58
Re: Hadoop Runner - Hadoop - [mail # user]
...Define Ur own custom Record Reader and its efficient .  On Sun, Jun 12, 2011 at 10:12 AM, Harsh J  wrote:  ...
   Author: madhu phatak, 2011-06-21, 10:50
Re: nomenclature - Hadoop - [mail # user]
...Master and slaves comes from the old distributed system terminologies . Since Hadoop also is a distributed system it uses that type of terminology  On Mon, Jun 13, 2011 at 6:36 AM, Mark...
   Author: madhu phatak, 2011-06-21, 10:47
Re: Handling external jars in EMR - Hadoop - [mail # user]
...Its better to merge the library with ur code . Other wise u have to copy the library to every lib folder of HADOOP in every node cluster. libjars is not working for me also . I used maven sh...
   Author: madhu phatak, 2011-06-21, 10:30
Re: ClassNotFoundException while running quick start guide on Windows. - Hadoop - [mail # user]
...I think the jar have some issuses where its not able to read the Main class from manifest . try unjar the jar and see in Manifest.xml what is the main class and then run as follows   bi...
   Author: madhu phatak, 2011-06-21, 10:24
Re: automatic monitoring the utilization of slaves - Hadoop - [mail # user]
...Its not possible since the slave will don't have knowledge of other slaves , so though master started the job , it may be running in other slaves . So in program if your running jobs using J...
   Author: madhu phatak, 2011-06-21, 10:16
Re: Heap Size is 27.25 MB/888.94 MB - Hadoop - [mail # user]
...Its related with the amount of memory available to Java Virtual machine that is created for hadoop jobs.  On Fri, Jun 17, 2011 at 1:18 AM, Harsh J  wrote:  ...
   Author: madhu phatak, 2011-06-21, 10:12
Re: HDFS File Appending - Hadoop - [mail # user]
...HDFS doesnot support Appending i think . I m not sure about pig , if you are using Hadoop directly you can zip the files and use zip as the input the jobs.  On Fri, Jun 17, 2011 at 6:56...
   Author: madhu phatak, 2011-06-21, 10:11
Re: Starting an HDFS node (standalone) programmatically by API - Hadoop - [mail # user]
...HDFS should be available to DataNodes in order to run the jobs and bin/hdfs just uses the hadoop jobs to access hdfs in datanodes .So if u want read a file from hdfs inside a job you have to...
   Author: madhu phatak, 2011-06-21, 10:00
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