Hadoop Users Group (HUG) Chennai

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Welcome to Hadoop User Group Chennai.

Here we will be discussing about hadoop ecosystem usecases , learnings.

Apart from hadoop ecosystem, we will be discussing about other Big data technologies as well as their integration.

See you soon!!!

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Kalyana Sundaram Balasubramanian

11/8/14

HDFS shell command setrep runs for ever

Hello There, Just trying my hands on with HDFS shell commands. meanwhile the setrep command runs

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HDFS

HDFS shell command setrep runs for ever

Hello There, Just trying my hands on with HDFS shell commands. meanwhile the setrep command runs

11/8/14

Krishna, … Aravind3

10/12/14

Urgent How to Increase the REDUCERS performance in Pig

Adding few more to Senthil's comment, Also it depends on the cluster size ... What is the size of

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HDFS

MapReduce

Performance

Urgent How to Increase the REDUCERS performance in Pig

Adding few more to Senthil's comment, Also it depends on the cluster size ... What is the size of

10/12/14

Sivaji

10/6/14

How can i identified Best number of Mappers and Reducers in my cluster

Hi Every one, In my organisation we are using 6 node cluster, i am running some pig scripts on more

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HDFS

Hadoop

MapReduce

How can i identified Best number of Mappers and Reducers in my cluster

Hi Every one, In my organisation we are using 6 node cluster, i am running some pig scripts on more

10/6/14

Sivaji, … Subrata Biswas5

10/7/14

Want to increase no of Maps and Reducers in PIG

Hi Sivaji, You can not set Number of mappers, it depends on no# of input Split/Block size. if your

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HDFS

MapReduce

Performance

Want to increase no of Maps and Reducers in PIG

Hi Sivaji, You can not set Number of mappers, it depends on no# of input Split/Block size. if your

10/7/14

santhosh oruganti

7/5/14

Java.Net.connection Refused

When I am running sample program ie word count or pi program using hadoop version 2.2.0 through

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HDFS

Hadoop

MapReduce

Java.Net.connection Refused

When I am running sample program ie word count or pi program using hadoop version 2.2.0 through

7/5/14

Mahesh Nair, Subrata Biswas3

7/29/14

Accelerate MapReduce development using Jumbune, an all in one open source tool for hadoop

Hi Mahesh, Does it work for hadoop 2 also. Couple of questions- 1. Is it agent less? 2. how does it

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HDFS

Hadoop

MapReduce

Accelerate MapReduce development using Jumbune, an all in one open source tool for hadoop

Hi Mahesh, Does it work for hadoop 2 also. Couple of questions- 1. Is it agent less? 2. how does it

7/29/14

Piyush Pawar

5/27/14

jps gives main class information unavailable

Hello, I suffered from this problem thst when i hit jps command it gives I am using hadoop-1.2.1 on

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HDFS

Hadoop

MapReduce

jps gives main class information unavailable

Hello, I suffered from this problem thst when i hit jps command it gives I am using hadoop-1.2.1 on

5/27/14

lakshminarayan, Sb Gowtham2

4/7/14

Namenode and JobTracker

Hi lakshminarayan If your cluster is not big enough (thousands of nodes) then there should be no

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HDFS

Hadoop

MapReduce

Namenode and JobTracker

Hi lakshminarayan If your cluster is not big enough (thousands of nodes) then there should be no

4/7/14

Prabhu R, … Sb Gowtham3

3/27/14

Big Data without Hadoop

Hi Prabhu Big data is a problem and it just a theory .Hadoop is where we solve the Big Data problem ,

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BigData

HDFS

Hadoop

Big Data without Hadoop

Hi Prabhu Big data is a problem and it just a theory .Hadoop is where we solve the Big Data problem ,

3/27/14

jaikumar

12/3/13

Nodemanager not started

Hi , I am configuring hadoop 2 -YARN with 3 node cluster . by following steps of this site http://

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BigData

HDFS

Hadoop

Nodemanager not started

Hi , I am configuring hadoop 2 -YARN with 3 node cluster . by following steps of this site http://

12/3/13

Sanjay Bhosale, Subu2

11/10/13

Where files should be stored from inside of Java UDF in pig?

I am not clear with your question. Could you please elaborate more, what exactly you are trying to do

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HDFS

Hadoop

Where files should be stored from inside of Java UDF in pig?

I am not clear with your question. Could you please elaborate more, what exactly you are trying to do

11/10/13

jaikumar, Vallinayagam2

10/22/13

HDFS Snapshots

Hello, A snapshot is a point-in-time image of part of the filesystem or the entire filesystem. HDFS

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Hello, A snapshot is a point-in-time image of part of the filesystem or the entire filesystem. HDFS

10/22/13

Senthil Kumar, … Anooj Prabaharan16

1/29/14

Hadoop 2 is Now GA !!!!!

Hi can you please send the steps for hadoop 2 cluster... i get error like dut7: # A fatal error has

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HDFS

Hadoop

MapReduce

Hadoop 2 is Now GA !!!!!

Hi can you please send the steps for hadoop 2 cluster... i get error like dut7: # A fatal error has

1/29/14

Sanjay Bhosale

10/11/13

Error while running customized java class

Can anybody please solve my this problem mentioned in link: http://stackoverflow.com/questions/

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HDFS

Hadoop

Error while running customized java class

Can anybody please solve my this problem mentioned in link: http://stackoverflow.com/questions/

10/11/13

anant...@gmail.com, Ashwanth Kumar3

10/9/13

What if Hadoop data is too big to move?

Disclaimer : This has been taken from another resource - http://gcn.com/Articles/2013/06/28/Hunk-

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BigData

HDFS

Hadoop

What if Hadoop data is too big to move?

Disclaimer : This has been taken from another resource - http://gcn.com/Articles/2013/06/28/Hunk-

10/9/13

Giri M

10/3/13

Hadoop 2.1.0 gap in log error

I am testing Hadoop 2.1.0 and planning to migrate my existing Hadoop 1 to Hadoop 2.1.0. But during

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HDFS

Hadoop

Hadoop 2.1.0 gap in log error

I am testing Hadoop 2.1.0 and planning to migrate my existing Hadoop 1 to Hadoop 2.1.0. But during

10/3/13

Hao Huang, Ashwanth Kumar4

7/18/13

Input csv data file to remote R-Hadoop cluster

Its been quite some time since I last used R with Hadoop. My only suggestion will be to check - https

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HDFS

Input csv data file to remote R-Hadoop cluster

Its been quite some time since I last used R with Hadoop. My only suggestion will be to check - https

7/18/13

Hao Huang, Ashwanth Kumar5

7/18/13

A question about hadoop.tmp.dir

Thank you, Kumar, thank you! You helped me alot!! 2013/7/17 Ashwanth Kumar <ashwanthkumar@

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HDFS

Hadoop

A question about hadoop.tmp.dir

Thank you, Kumar, thank you! You helped me alot!! 2013/7/17 Ashwanth Kumar <ashwanthkumar@

7/18/13

ksr, Senthil Kumar2

4/1/13

Migration from Mainframe to HDFS

Very Simple . Just Use either CLI or Java client to move the data. On Mon, Apr 1, 2013 at 4:05 PM,

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HDFS

Migration from Mainframe to HDFS

Very Simple . Just Use either CLI or Java client to move the data. On Mon, Apr 1, 2013 at 4:05 PM,

4/1/13

Srinivasan Ramalingam, … Bini5

3/25/13

How to Increase the performance in Flume

Ok Thanks binish , i will do that. On Sun, Mar 24, 2013 at 11:32 PM, Bini <talk...@gmail.com>

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Flume

HDFS

How to Increase the performance in Flume

Ok Thanks binish , i will do that. On Sun, Mar 24, 2013 at 11:32 PM, Bini <talk...@gmail.com>

3/25/13

Rajasri, Ashwanth Kumar5

1/29/13

copying a text file with integers to all the data nodes in the cluster

Thank u :) Will try it out! Regards, Rajasri.J On Tue, Jan 29, 2013 at 9:26 PM, Ashwanth Kumar <

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HDFS

Hadoop

MapReduce

copying a text file with integers to all the data nodes in the cluster

Thank u :) Will try it out! Regards, Rajasri.J On Tue, Jan 29, 2013 at 9:26 PM, Ashwanth Kumar <

1/29/13

Rajasri, … Arun Kumar Dharuman4

1/20/13

Accessing content in hdfs in other data node from master node

If a replica of the file (which was stored from master) is in another datanode, then we can access it

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HDFS

Hadoop

Accessing content in hdfs in other data node from master node

If a replica of the file (which was stored from master) is in another datanode, then we can access it

1/20/13

kumar vaibhav, Senthil Kumar4

1/3/13

Huge Datasets and some POC ideas to look at

@Senthil - Still trying to figure out what to do. Hope to finalize something before the meet.

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HDFS

Hadoop

MapReduce

Huge Datasets and some POC ideas to look at

@Senthil - Still trying to figure out what to do. Hope to finalize something before the meet.

1/3/13