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[expand - 1 more] - Re: Ideal number of mappers and reducers to increase performance - Hadoop - [mail # user]
...Felix has already explained most of the characteristics that definethe parallelism of MR jobs.How many mappers does your program run? Your parallel performancedepends on how much parallelism...
   Author: Harsh J, 2014-08-07, 10:37
[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, 2014-08-07, 05:12
Re: Hadoop 2.4.0 How to change "Configured Capacity" - Hadoop - [mail # user]
...You will need to set them up in the hdfs-site.xml.P.s. Their default is present in the hdfs-default.xml you linked to:http://hadoop.apache.org/docs/r2.4.1/hadoop-project-dist/hadoop-hdfs/hdf...
   Author: Harsh J, 2014-08-02, 11:53
Re: Master /slave file configuration for multiple datanodes on same machine - Hadoop - [mail # user]
...The SSH-helped slave file approach will not work for the goal ofrunning multiple slave daemons per host, where different configurationdirectories are instead expected to be used.You can inst...
   Author: Harsh J, 2014-07-31, 04:14
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
[expand - 1 more] - 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 ...
   Author: Harsh J, 2014-07-28, 07:45
[expand - 1 more] - 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...
   Author: Harsh J, 2014-07-28, 07:42
[expand - 1 more] - 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...
   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
[expand - 2 more] - 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 ...
   Author: Harsh J, 2014-07-14, 19:40
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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