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Re: Sorting text data - Hadoop - [mail # user]
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...Hi Sangrova Your map method is emitting key values pairs whose type is different than the expected types specified in your driver class. TextInputFormat has LongWritable...
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Author: bejoy.hadoop@...,
2012-02-08, 15:33
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Re: What's the best practice of loading logs into hdfs while using hive to do log analytic? - Hadoop - [mail # user]
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...Hi Assume your external table location points to an hdfs dir say /ext_tables/table1/ you can write your custom code in flume that would ingest data into sub dir within th...
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Author: bejoy.hadoop@...,
2012-02-07, 15:38
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Re: What's the best practice of loading logs into hdfs while using hive to do log analytic? - Hadoop - [mail # user]
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...Hi If you are looking at a solution to ingest data into hdfs in real time, ie as soon as it is generated, you need to look into Cloudera Flume. It makes realtime data in...
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Author: bejoy.hadoop@...,
2012-02-07, 10:29
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Re: Can I write to an compressed file which is located in hdfs? - Hadoop - [mail # user]
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...Hi AFAIK I don't think it is possible to append into a compressed file. If you have files in hdfs on a dir and you need to compress the same (like files for an hour) you ...
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Author: bejoy.hadoop@...,
2012-02-07, 07:53
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Re: How to Set the Value of hadoop.tmp.dir? - Hadoop - [mail # user]
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...Hi Bing What is yout value for dfs.name.dir and dfs.data.dir ? I believe that is still pointing to /tmp. Better to change it to another location as /tmp gets wiped on ev...
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Author: bejoy.hadoop@...,
2012-02-06, 20:47
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Re: Can I write to an compressed file which is located in hdfs? - Hadoop - [mail # user]
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...Hi I agree with David on the point, you can achieve step 1 of my previous response with flume. ie load real time inflow of data in compressed format into hdfs. You...
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Author: bejoy.hadoop@...,
2012-02-06, 14:23
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Re: Can I write to an compressed file which is located in hdfs? - Hadoop - [mail # user]
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...Hi If you have log files enough to become at least one block size in an hour. You can go ahead as - run a scheduled job every hour that compresses the log files for that ...
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Author: bejoy.hadoop@...,
2012-02-06, 11:53
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Re: has bzip2 compression been deprecated? - Hadoop - [mail # user]
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...Hi Tim When you say in hive a table data is compressed by using LZO or so. It means the file/blocks that contains the records/data are compressed using...
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Author: bejoy.hadoop@...,
2012-01-09, 21:22
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Re: Matrix multiplication in Hadoop - Hadoop - [mail # user]
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...Hey Mike In mahout one place where matrix multiplication is used is in Collaborative Filtering distributed implementation. The recommendations...
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Author: bejoy.hadoop@...,
2011-11-19, 22:17
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Re: Input split for a streaming job! - Hadoop - [mail # user]
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...Hi Raj AFAIK 0.21is an unstable release and I fear anyone would recommend that for production. You can play around with the same, a better approach would be patchi...
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Author: bejoy.hadoop@...,
2011-11-11, 18:44
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