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RE: Folder not created using Hadoop Mapreduce code - MapReduce - [mail # user]
...Maybe just a silly guess, did you close your Writer? Yong  Date: Thu, 14 Nov 2013 12:47:13 +0530 Subject: Re: Folder not created using Hadoop Mapreduce code From: [EMAIL PROTECTED] To: ...
   Author: java8964 java8964, 2013-11-14, 15:21
[expand - 2 more] - RE: Why the reducer's input group count is higher than my GroupComparator implementation - HDFS - [mail # user]
...OK.  Finally I found out the reason for this problem, after reading the Hadoop ReducerTask source code. Here is the mistake I made, and something new I learned about secondary sorting. ...
   Author: java8964 java8964, 2013-10-31, 01:30
How the custom Key class can be used in Avro - Avro - [mail # user]
...Hi, Currently I have a MR job needs to use my own Key class to support 2nd sort in the MR job. The originally job is using Avro String type as the mapper output like this format: public clas...
   Author: java8964 java8964, 2013-10-27, 14:59
[expand - 1 more] - RE: Mapreduce outputs to a different cluster? - MapReduce - [mail # user]
...Just use "hdfs://machine.domain:8080/tmp/myfolder" Yong  Date: Thu, 24 Oct 2013 20:25:35 -0700 From: [EMAIL PROTECTED] Subject: Re: Mapreduce outputs to a different cluster? To: [EMAIL ...
   Author: java8964 java8964, 2013-10-26, 23:10
hive partition pruning on joining on partition column - Hive - [mail # user]
...I have the requirement trying to support in hive, not sure if it is doable. I have the hadoop 1.1.1 with Hive 0.9.0 (Using deby as the meta store) If I partition my data by a dt column, so i...
   Author: java8964 java8964, 2013-10-11, 17:05
[expand - 1 more] - RE: Use NLineInputFormat in AvroMapper - Avro - [mail # user]
...I changed my Mapper based on the following example: org.apache.avro.mapred.TestGenericJob and change my mapper and driver to the following: public class Tracking3Mapper2 extends MapReduceBas...
   Author: java8964 java8964, 2013-10-09, 02:37
[expand - 2 more] - RE: enable snappy on hadoop 1.1.1 - MapReduce - [mail # user]
...Thanks for your guys' help. It looks like the libhadoop.so didn't link the snappy in it, even it claims to support it in 2.1. I already created a ticket for this. I manually compiled the had...
   Author: java8964 java8964, 2013-10-07, 13:07
benefits to store the data as key/value in avro - Avro - [mail # user]
...Hi,  I have a question related to how to store my data in AVRO. Right now, I have 2 options, first one is serialize the whole object as one Avro object, like following: foo {id1 long,id...
   Author: java8964 java8964, 2013-10-05, 15:41
Will different files in HDFS trigger different mapper - MapReduce - [mail # user]
...Hi, I have a question related to how the mapper generated for the input files from HDFS. I understand the split and blocks concept in the HDFS, but my originally understanding is that one ma...
   Author: java8964 java8964, 2013-10-02, 20:22
[expand - 1 more] - RE: Question related to AvroJob.setMapOutputSchema(org.apache.hadoop.mapred.JobConf job, Schema s) - Avro - [mail # user]
...Hi, Alan: Thanks for you suggestion. I will take a look about MultipleOutput. But in this case, I still need to specify the schema in  my driver, right? You mean I should use union sche...
   Author: java8964 java8964, 2013-10-01, 11:21
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