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Happy birthday Hadoop - HDFS - [mail # user]
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...On this great day, when Hadoop 0.1.0 was released 7 years ago, I convey my greetings to all you Hadoop enthusiasts. Thanks to the entire community and everybody else who has always helped us...
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Author: Mohammad Tariq,
2013-04-01, 20:46
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Re: Running test on hadoop cluster - HDFS - [mail # user]
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...Hello Rahul, You might find this links useful : http://www.michael-noll.com/blog/2011/04/09/benchmarking-and-stress-testing-an-hadoop-cluster-with-terasort-testdfsio-nnbench-mr...
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Author: Mohammad Tariq,
2013-03-29, 21:21
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Re: Need Help on Hadoop cluster Setup - HDFS - [mail # user]
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...Hello Munavvar, It depends on your configuration where your DNs and TTs will run. If you have configured all your slaves to run both the processes then they should...
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Author: Mohammad Tariq,
2013-03-22, 13:36
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Re: format NameNode after reboot - HDFS - [mail # user]
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...Have you added these properties in your hdfs-site.xml file : dfs.name.dir /hadoop/hdfs/name dfs.data.dir /hadoop/hdfs/data I...
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Author: Mohammad Tariq,
2013-03-20, 12:02
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Re: How to pull Delta data from one cluster to another cluster ? - HDFS - [mail # user]
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...I have never tried it personally, but it might work. Also have a look at Flume. You might find it helpful. Warm Regards, Tariq https://mtariq.jux.com/ cloudfront.blogspot.com On...
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Author: Mohammad Tariq,
2013-03-14, 11:50
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Re: Block vs FileSplit vs record vs line - HDFS - [mail # user]
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...Just to add to what Manish sir has said, HDFS blocks and MR filesplits are 2 different things. filesplits are just logical division of your data such that each split goes to a mapper for pro...
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Author: Mohammad Tariq,
2013-03-14, 11:42
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Re: Second node hdfs - HDFS - [mail # user]
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...No, you don't have to format the NN everytime you add a DN. Looking at your case, it seems the second DN was part of some other cluster and has the ID of that NN. Warm Regards, Tariq h...
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Author: Mohammad Tariq,
2013-03-13, 15:47
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Re: Second node hdfs - HDFS - [mail # user]
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...Hello Cyril, This is because your datanode has a different namespaceID from the one which master(namenode) actually has. Have you formatted the HDFS recently? Were...
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Author: Mohammad Tariq,
2013-03-13, 14:34
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Re: INCREASING NUMBER OF REDUCE TASKS - HDFS - [mail # user]
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...Hello Preethi, You can do it through the shell at the time of job submission. -D mapred.reduce.tasks=desired_no_reduce_tasks. Alternatively, you can do that through the map...
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Author: Mohammad Tariq,
2013-03-12, 11:27
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Re: Namenode failures - HDFS - [mail # user]
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...Hello Robert, It seems that your edit logs and fsimage have got corrupted somehow. It looks somewhat similar to this one https://issues.apache.org/jira/bro...
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Author: Mohammad Tariq,
2013-02-17, 22:41
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