• Setup data mart for big data

    What is the approach to be followed to set up data mart for the big data? With the Existing model data marts are carved out of warehouses for each of the business areas, which includes cleansing, packaging and structured delivery of data for relevant business consumption.

    BalajiRamarajan10 pointsBadges:
  • How to start a big data project

    I want to do a project on Big data, but I don't know how to start? Is anyone can guide me?

    Jamvant5 pointsBadges:
  • What are the steps for data archiving from SAP BW/4 HANA to Hadoop using NLS?

    Hi, I want to do data archiving in SAP BW/4 HANA into Hadoop. I am not able to set NLS connection for Hadoop. Please let me know how to do it. Thanks, Jyothsna

    JyothsnaRongali10 pointsBadges:
  • How to create NLS connection for Hadoop

    How can I create a NLS connection with Hadoop.

    JyothsnaRongali10 pointsBadges:
  • Big data & Hadoop

    What operating system do I need to install to work with Hadoop & Big Data. I want to run Hadoop system for experimental purpose, for my academic research. Basically I need to work on hives, pig. So Please suggest me on this. I have purchased a new laptop for this purpose.

    mnkumar19765 pointsBadges:
  • Shift technology from AS/400 to big data

    Hi Group, I have been working on AS/400 platform for the past 9 years. As the jobs on AS/400 are getting obsolete, I want to learn Bigdata. I am also interested in this new technology, but am not sure whether to go for it. Could anyone tell this how this course would help me? Regards, M

    mvrkrishna560 pointsBadges:
  • Switch from Mainframes to big data

    Hello, I've been in mainframe development for almost 7 years. Now, I am getting attracted by Hadoop/Big data as its becoming the most emerging technology nowadays.  It seems that I have few options: Stick with my current technology (mainframes) and drop the idea of moving to Hadoop. Learn Hadoop...

    vishalverma5 pointsBadges:
  • Error when configuring Hadoop on CentOS

    I've been configuring Hadoop on one of our servers that's running CentOS. When I run start-dfs.sh, I keep getting this error: WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable So I'm not sure what to do here. Has anyone...

    ITKE828,985 pointsBadges:
  • ElasticSearch for real-time statistics

    We have to log millions and millions of small log documents on a weekly basis. This includes: Ad hoc queries for data mining Joining and filtering values Full-text search with Python We thought about using HBase and running Hadoop jobs to generate stat results. But the problem is that the results...

    ITKE828,985 pointsBadges:
  • Hadoop error when accessing application through HTML

    We have installed Hadoop on our cluster and now we're installing HTTPFS to access the HDFS content using HTTP protocol. We're able to access the normal page but when we tried to access HDFS, we're getting an error: {"RemoteException":{"message":"User: ubantu is not allowed to impersonate ubantu",...

    ITKE828,985 pointsBadges:
  • Out of memory error when installing Hadoop

    I recently tried to install Hadoop following a document my friend gave me. When I tried to execute this: bin/hadoop jar hadoop-examples-*.jar grep input output 'dfs[a-z.]+' I got this exception: java.lang.OutOfMemoryError: Java heap space Has anyone seen this before? Like I said, I'm pretty new to...

    ITKE828,985 pointsBadges:
  • JAVA_HOME is not set correctly when installing Hadoop on Ubuntu

    I've been trying to install Hadoop on Ubuntu 11.10. I just set the JAVA_HOME variable in the file conf/hadoop-env.sh to: # export JAVA_HOME=/usr/lib/jvm/java-1.6.0-openjdk Then I tried to execute these commands: $ mkdir input $ cp conf/*.xml input $ bin/hadoop jar hadoop-examples-*.jar grep input...

    ITKE828,985 pointsBadges:
  • Hadoop: What’s the difference between Pig and Hive?

    I'm pretty new to the Hadoop world (been using it for about a month) and I've started to get into Hive, Pig and Hadoop using Cloudera's Hadoop VM. Is there a difference between Pig and Hive? I understand they have similar commands so I'm trying to figure out the big differences.

    ITKE828,985 pointsBadges:
  • What’s the difference between S3 and S3N in Hadoop?

    When we recently connected our Hadoop cluster to our Amazon storage and downloaded a file to HDFS, we noticed that s3:// didn't work but when we tried out S3N, it worked. Why didn't it work with S3? Is there a difference between the two?

    ITKE828,985 pointsBadges:
  • Hadoop: Safemode recovery is taking too long

    We have a Hadoop cluster with 18 data nodes. We recently restarted the name node about three hours ago and it's still in safe mode! We're not sure if we should try to restart it. We looked online and found this to try: dfs.namenode.handler.count 3 true Should we try this? If not, has anyone seen...

    ITKE828,985 pointsBadges:
  • Hadoop: How to handle data streams in real-time

    I've recently been working with Hadoop and now I'm using it to handle data streams in real-time. For this, I would like to build a meaningful POC around it so I could showcase it. I'm pretty limited in resources so any help would be appreciated.

    ITKE828,985 pointsBadges:
  • How to run Hadoop job without JobConf

    I'm trying to submit a Hadoop job that doesn't use the deprecated JobConf class. But my friend told me that JobClient only supports methods that take a JobConf parameter. Does anyone know how I can submit a Hadoop job using only the configuration class? Is there a Java code for it?

    ITKE828,985 pointsBadges:
  • Big data: How to get started

    We've been using R for several years and now we're starting to get into Python. We've been using RDBMS systems for data warehousing and R for number-crunching. Now, we think it's time to get more involved with big data analysis. Does anyone know how we should get started (basically how to use...

    ITKE828,985 pointsBadges:
  • How to compress large files in Hadoop

    I need to process a huge file and I'm looking to use Hadoop for it. From what my friend has told me, the file would get split into several different nodes. But if the file is compressed, then the file won't be split and would need to be processed a single node (and I wouldn't be able to use...

    ITKE828,985 pointsBadges:
  • Free space in HDFS

    Would there be a HDFS command to see if there's available free space in HDFS. I'm able to see it through the the browser using master:hdfsport. But unfortunately, I can't access it and I need a command. I can see disk usage but not free space. Appreciate the help.

    ITKE828,985 pointsBadges:

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