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Re: listing a 530k files directory - Hadoop - [mail # user]
...Hi Guido,You can set client side heap in HADOOP_OPTS variable before running the lscommand.export HADOOP_OPTS="-Xmx3g"; hadoop fs -ls /- BharathOn Fri, May 30, 2014 at 5:22 PM, Guido Serra &...
   Author: bharath vissapragada, 2014-05-30, 12:44
[expand - 1 more] - Re: Reg job tracker page - Hadoop - [mail # user]
...Its just some unique identifier generated with date and timestamp for this session of jobtracker !  On Sat, Feb 23, 2013 at 5:25 PM, bharath vissapragada  wrote:...
   Author: bharath vissapragada, 2013-02-23, 11:56
Re: Understanding harpoon - help needed - Hadoop - [mail # user]
...Hi,  Link [1] partly answers your question. Namenode chooses the "nearest" data-node that can cater this request. So replication definitely helps, in the sense that a replica might be p...
   Author: bharath vissapragada, 2013-01-23, 09:44
Re: io.sort.factor - Hadoop - [mail # user]
...Hi,  flushes as more data is spilled at once and this boosts the performance. This obviously decreases the number of spills.  One possibility in this case is that, the number of sp...
   Author: bharath vissapragada, 2013-01-23, 06:44
Re: Best practice for storage of data that changes - Hadoop - [mail # user]
...Hi Jeff,  Please look at [1] . You can store your data in HBase tables and query them normally just by mapping them to Hive tables. Regarding Cassandra support, please follow JIRA [2], ...
   Author: bharath vissapragada, 2012-11-25, 04:10
Re: MapReduce logs - Hadoop - [mail # user]
...Hi,  I'm not sure if my answer can be applied in your case, but sharing because I found it interesting !  I saw a cluster where the path containing "Hadoop installation directory" ...
   Author: bharath vissapragada, 2012-11-21, 20:00
Re: reducer not starting - Hadoop - [mail # user]
...As harsh suggested, you might want to check the task logs on slaves (you can do it though web UI by clicking on map/reduce task links) and see if there are any exceptions .   On Wed, No...
   Author: bharath vissapragada, 2012-11-21, 14:42
Re: More cores Vs More Nodes ? - Hadoop - [mail # user]
...Hey there,  I agree with Tom's response. One can decide it based on the type of jobs you run. I have been working on Hive and I realized that increasing no. of cores would give very goo...
   Author: bharath vissapragada, 2011-12-13, 17:59
Re: Too many fetch failures. Help! - Hadoop - [mail # user]
...Hey,  Try configuring your cluster with hostnames instead of ips and add those entries to /etc/hosts and sync it across all the nodes in the cluster. You need to restart the cluster aft...
   Author: bharath vissapragada, 2011-09-26, 15:24
Re: Out of Memory Exception while building hadoop - Hadoop - [mail # user]
...Linking to sun's jdk 1.5 instead of java-gcj solves this problem. (Forrest works correctly with java 1.5). If you link the java5.home to java1.6 you might face compilation issues again. &nbs...
   Author: bharath vissapragada, 2011-09-04, 21:36
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