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Re: How can I add a new hard disk in an existing HDFS cluster? - MapReduce - [mail # user]
...I think the question here is as how to add new HDD volumn into an already existing formatted HDFS cluster. Not sure , by just adding the directory in data.dfs.dir would help.   On Fri, ...
   Author: Rahul Bhattacharjee, 2013-05-05, 16:30
Hadoop Avro Question - MapReduce - [mail # user]
...Hi,  When dealing with Avro data files in MR jobs ,we use AvroMapper , I noticed that the output of K and V of AvroMapper isnt writable and neither the key is comparable (these are Avro...
   Author: Rahul Bhattacharjee, 2013-04-30, 13:21
Re: Hadoop sampler related query! - MapReduce - [mail # user]
...+ mapred dev   On Tue, Apr 16, 2013 at 2:19 PM, Rahul Bhattacharjee  wrote:  ...
   Author: Rahul Bhattacharjee, 2013-04-23, 10:42
Umbilical interface - MapReduce - [mail # user]
...Hi,  Tasktracer runs each of the tasks (M or R) in a separate VM (considering VM reuse is disabled).So the actual task and task tracer daemon run in two different OS processes. Umbilica...
   Author: Rahul Bhattacharjee, 2013-04-22, 15:27
Re: SQL to pig latin - MapReduce - [mail # user]
...Share the schema of the dataset at least against which you want pig script to be written. (For people those who want to attempt) Thanks, Rahul   On Mon, Apr 22, 2013 at 2:49 PM, suneel ...
   Author: Rahul Bhattacharjee, 2013-04-22, 12:26
Re: Re: How to balance reduce job - MapReduce - [mail # user]
...You can use input sampler , and you have to plug a custom partitioner which would ensure that all reducers have near-equal pairs to process. The input sampler goes over the sampled data befo...
   Author: Rahul Bhattacharjee, 2013-04-21, 14:41
Re: VM reuse! - MapReduce - [mail # user]
...Ok, Thanks Bejoy.  Only in some typical scenarios it's possible , like the one that you have mentioned. Much more number of mappers and less number of mappers slots.  Regards, Rahu...
   Author: Rahul Bhattacharjee, 2013-04-16, 11:33
Re: <ask> How to Overwrite file on HDFS - MapReduce - [mail # user]
...https://issues.apache.org/jira/browse/HADOOP-7361  Thanks, Rahul   On Thu, Apr 4, 2013 at 2:30 PM, Iftakhul Anwar  wrote:  ...
   Author: Rahul Bhattacharjee, 2013-04-04, 09:03
Re: NameNode failure and recovery! - MapReduce - [mail # user]
...Thats also doable , reducing the checkpoint period would also have have some amount of edit log loss and how short should be the checkpoint interval has to be evaluated.I think the good way ...
3 emails [+ more]    Author: Rahul Bhattacharjee, 2013-04-04, 03:12
Re: Streaming value of (200MB) from a SequenceFile - MapReduce - [mail # user]
...Sorry for the multiple replies.  There is one more thing that can be done (I guess) for streaming the values rather then constructing the whole object itself.We can store the value in h...
2 emails [+ more]    Author: Rahul Bhattacharjee, 2013-04-01, 03:56
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