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Re: Ideal number of mappers and reducers to increase performance - Hadoop - [mail # user]
...You can perhaps start with a generic 4+4 configuration (which matchesyour cores), and tune your way upwards or downwards from there basedon your results.On Thu, Jul 31, 2014 at 8:35 PM, Sind...
   Author: Harsh J, 2014-07-31, 22:00
Re: Performance on singlenode and multinode hadoop - Hadoop - [mail # user]
...It isn't the DataNode that does the compute spawn/work, but the TaskTracker.If you wanted to increase MR parallelism on a single machine, you donot need two DNs, nor two TTs, just higher slo...
   Author: Harsh J, 2014-07-29, 16:57
[HADOOP-8027] Visiting /jmx on the daemon web interfaces may print unnecessary error in logs - Hadoop - [issue]
...Logs that follow a /jmx servlet visit:11/11/22 12:09:52 ERROR jmx.JMXJsonServlet: getting attribute UsageThreshold of java.lang:type=MemoryPool,name=Par Eden Space threw an exceptionjavax.ma...
http://issues.apache.org/jira/browse/HADOOP-8027    Author: Harsh J, 2014-07-29, 04:01
Re: Question about sqoop command error - Hadoop - [mail # user]
...This appears to be an JDBC end issue (not Sqoop's issue). You likelyhave a mix of different Oracle JDBC (non-DMS and DMS ones?) jars under$SQOOP_HOME/lib or other locations. This is causing ...
2 emails [+ more]    Author: Harsh J, 2014-07-28, 07:45
Re: Cannot compaile a basic PutMerge.java program - Hadoop - [mail # user]
...Please run it in the same style. The binary 'java' accepts a -cp param too:java -cp $($HADOOP_HOME/bin/hadoop classpath):. PutMergeOn Mon, Jul 28, 2014 at 11:21 AM, R J  wrote:Harsh J&n...
2 emails [+ more]    Author: Harsh J, 2014-07-28, 07:42
Re: Building custom block placement policy. What is srcPath? - Hadoop - [mail # user]
...Hi,Inline.On Fri, Jul 25, 2014 at 2:55 AM, Arjun Bakshi  wrote:You are assuming that all files are "loaded" into the cluster from anexisting file on another FS, such as a local FS and t...
2 emails [+ more]    Author: Harsh J, 2014-07-24, 22:21
Re: Re: HDFS input/output error - fuse mount - Hadoop - [mail # user]
...Apache Bigtop detects JVM based on the most recent version first, ifyou use packages based on their framework:https://github.com/apache/bigtop/blob/master/bigtop-packages/src/common/bigtop-u...
   Author: Harsh J, 2014-07-19, 10:47
Re: OIV Compatiblity - Hadoop - [mail # user]
...There shouldn't be any - it basically streams over the existing localfsimage file.On Tue, Jul 15, 2014 at 12:21 AM, Ashish Dobhal wrote:Harsh J ...
3 emails [+ more]    Author: Harsh J, 2014-07-14, 19:40
Re: Where is hdfs result ? - Hadoop - [mail # user]
...The pi job does not leave any HDFS data. You can see its result on theconsole: "Estimated value of Pi is 3.14127500000000000000".What are you trying to really test or do here? If you want da...
   Author: Harsh J, 2014-06-23, 11:30
Re: Edit permission to Hadoop Wiki page - Hadoop - [mail # dev]
...Hi,You should be able to edit pages on the wiki.apache.org/hadoop wiki asyour username's in there (thanks Steve!). Are you unable to? Let usknow.On Tue, Jun 17, 2014 at 1:55 AM, Asokan, M &n...
   Author: Harsh J, 2014-06-18, 04:58
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