Re: how to make different mappers execute different processing on same data ?

Hi Jason, Mehmet said is exactly correct ,without reducers we cannot increase performance please you can add mappers and reducers in any processing data you can get output and performance is good. Thanks Regards, Ramesh.Narasingu On Tue, Sep 11, 2012 at 9:31 AM, Mehmet

Re: Can't run PI example on hadoop 0.23.1

Hi Vinod, Please check whether input file location and output file location doesnt match. please find your input file first put into HDFS and then run MR job it is working fine. Thanks Regards, Ramesh.Narasingu On Tue, Sep 11, 2012 at 4:23 AM, Vinod Kumar Vavilapalli

Re: hadoop trunk build failure - yarn, surefire related?

Hi, Please find i think one command is there then only build the all applications. Thanks Regards, Ramesh.Narasingu On Tue, Sep 11, 2012 at 2:28 PM, Tony Burton tbur...@sportingindex.comwrote: Hi, ** ** I’ve checked out the hadoop trunk, and I’m running “mvn test” on the

Re: Hadoop Streaming: Does not recognise PATH and CLASSPATH defined

Hi Andy, Please specify the environment varibles in gedit .bashrc. you can specify for the JAVA_HOME environment variables and configuration hadoop-site.xml,hadoop-core.xml,and hadoop-default.xml files you can specify which version hadoop you can use those things and then close .bashrc

Re: how to execute different tasks on data nodes(simultaneously in hadoop).

Hi Users, Hadoop can distribute all the data into HDFS inside MapReduce tasks can work together. which one is goes to which data node and how it works all those things it can maintain each task has own JVM in each data node. JVM can handle hell number of data to process to the all

Re: knowing the nodes on which reduce tasks will run

Hi Abhay, NameNode it has address of the all data nodes. MapReduce can do all the data is processing. First data set is putting into HDFS filesystem and then run hadoop jar file. Map task can handle input files for shufle, sorting and grouped together. Map task is completed and then

Re: Hadoop Streaming: Does not recognise PATH and CLASSPATH defined

Hi Rekha, What I said means first he has set install java and then pwd(present working directory) for JAVA_HOME directory and then set to classpath for the hadoop installation. Thanks Regards, Ramesh.Narasingu On Tue, Sep 4, 2012 at 1:36 PM, Joshi, Rekha rekha_jo...@intuit.com wrote:

Re: Error using hadoop in non-distributed mode

Hi Pat, Please specify correct input file location. Thanks Regards, Ramesh.Narasingu On Mon, Sep 3, 2012 at 9:28 PM, Pat Ferrel p...@occamsmachete.com wrote: Using hadoop with mahout in a local filesystem/non-hdfs config for debugging purposes inside Intellij IDEA. When I run one

Re: Hadoop Streaming: Does not recognise PATH and CLASSPATH defined

. Again, appreciate your help. Andy On 4 September 2012 18:13, Narasingu Ramesh ramesh.narasi...@gmail.comwrote: Hi Rekha, What I said means first he has set install java and then pwd(present working directory) for JAVA_HOME directory and then set to classpath for the hadoop