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Re: Calling C inside MR - Hadoop - [mail # user]
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...Thank you so much Bertrand for the quick response. One quick question, would it affect the MR performance?? I mean, if I write a MR to do something and write another MR for the same ta...
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Author: Mohammad Tariq,
2012-12-03, 13:03
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Calling C inside MR - Hadoop - [mail # user]
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...Hello list, I have a tool (written in C) that performs some different types of operations and can be used as a command line utility. I had to write a...
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Author: Mohammad Tariq,
2012-12-03, 12:05
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Re: hadoop multinode with 2 nodes error starting datanode on slave - Hadoop - [mail # user]
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...Hello Kshitij, What exactly is the error. It's quite difficult to say anything without having any idea about the actual error. There could be n reasons for that. Regards, ...
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Author: Mohammad Tariq,
2012-11-26, 19:02
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Re: hbase hive integration - "FAILED: Error in metadata: javax.jdo.JDOFatalInternalException: Error creating transactional connection factory" - Hadoop - [mail # user]
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...Do you have the derby-*jar in your $HIVE_HOME/lib directory?If not, download it put it there. BTW, which version are you using? Regards, Mohammad Tariq On Mo...
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Author: Mohammad Tariq,
2012-11-26, 13:29
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Re: hbase hive integration - "FAILED: Error in metadata: javax.jdo.JDOFatalInternalException: Error creating transactional connection factory" - Hadoop - [mail # user]
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...Hello Barak, Are you using the default metadata store(derby) or tying to use something else like MySQL?If latter is the case, make sure you have the necessary connector ...
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Author: Mohammad Tariq,
2012-11-26, 12:53
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Re: Hadoop on Tomcat issue ?? - Hadoop - [mail # user]
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...Hello Praveenesh, Just make sure that everything is OK with your 'manifest' file?Does it have all the required bundles?I am not 100% sure about this, but it could be a r...
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Author: Mohammad Tariq,
2012-11-23, 11:08
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Re: fundamental doubt - Hadoop - [mail # user]
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...Hello Jamal, For efficient processing all the values associated with the same key get sorted and go to same reducer. As a result the reducer gets a key and a list of val...
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Author: Mohammad Tariq,
2012-11-21, 19:58
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Re: guessing number of reducers. - Hadoop - [mail # user]
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...Hello Jamal, I use a different approach based on the no of cores. If you have, say a 4 cores machine then you can have (0.75*no cores)no. of MR slots. For example, if you...
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Author: Mohammad Tariq,
2012-11-21, 18:04
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Re: Reading multiple lines from a microsoft doc in hadoop - Hadoop - [mail # user]
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...Sorry I forgot the link : http://hadoopchicago.com/tips-tricks/custom-xmlreader-boris-lublinsky-micha el-segel/ Regards, Mohammad Tariq On Fri, Aug 24, 2012 ...
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Author: Mohammad Tariq,
2012-08-24, 07:41
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Re: Reading multiple lines from a microsoft doc in hadoop - Hadoop - [mail # user]
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...Hello Siddharth, You can tweak the "NLineInputFormat" as per your requirement and use it. It allows us to read a specified no of lines unlike "TextInputFormat". H...
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Author: Mohammad Tariq,
2012-08-24, 07:40
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