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Re: Map-Reduce: How to make MR output one file an hour? - Hadoop - [mail # user]
...Don't you think using flume would be easier. Use hdfs sink and use aproperty to roll out the log file every hour.By doing this way you use a single flume agent to receive logs as and whenit ...
   Author: Shekhar Sharma, 2014-03-02, 07:36
Re: Mappers vs. Map tasks - Hadoop - [mail # user]
...Writing a custom input format would be much easier and you would havebetter controlYou might be tempted to use Jackson lib to do the process json  but thatrequires that you need to know...
   Author: Shekhar Sharma, 2014-02-27, 05:58
Re: Reg:Hive query with mapreduce - Hadoop - [mail # user]
...Assuming you are using TextInputFormat and your data set is comma separatedvalue , where secondColumn is empId third column is salary, then yourmapfunction would look like thispublic class F...
   Author: Shekhar Sharma, 2014-02-20, 17:27
Re: XML to TEXT - Hadoop - [mail # user]
...Which input format you are using . Use xml input format.On 3 Jan 2014 10:47, "Ranjini Rathinam"  wrote: ...
   Author: Shekhar Sharma, 2014-02-12, 15:14
Re: A hadoop command to determine the replication factor of a hdfs file ? - Hadoop - [mail # user]
...Run fsck commandOn 8 Feb 2014 23:03, "Raj Hadoop"  wrote: ...
   Author: Shekhar Sharma, 2014-02-08, 17:36
commissioning and decommissioning a task tracker - Hadoop - [mail # user]
...Hello ,I am not able to commission and decommission a tasktracker. I am usinghadoop version 1.0.3 and used the property "mapred.hosts" property forcommissioning a task tracker..When I see th...
   Author: Shekhar Sharma, 2014-02-03, 05:38
Re: Commissioning Task tracker - Hadoop - [mail # user]
...Thats fine..I have provided the file name as "include"I have tried this also..but i am getting the same errormy xml files are as follows:hdfs-site.xml      dfs.repli...
   Author: Shekhar Sharma, 2014-01-27, 16:10
Re: HDFS data transfer is faster than SCP based transfer? - Hadoop - [mail # user]
...We have the concept of short circuit reads which directly reads from datanode which improve read performance. Do we have similar concept like shortcircuit writesOn 25 Jan 2014 16:10, "Harsh ...
   Author: Shekhar Sharma, 2014-01-25, 10:44
Re: hadoop report has corrupt block but i can not find any in block metadata - Hadoop - [mail # user]
...Run fsck commandhadoop fsck 《path》-files  -blocks   -locationsOn 25 Jan 2014 08:04, "ch huang"  wrote: ...
   Author: Shekhar Sharma, 2014-01-25, 10:31
Re: Datanode Shutting down automatically - Hadoop - [mail # user]
...Incompatible name space Id error.its because dat u might have formatted thenamenode but data nodes folder is still have the same I'd.What is the value of the following propertydfs. Data.dird...
   Author: Shekhar Sharma, 2014-01-25, 07:10
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