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Latest Questions for Big Data Tutorial and Training
Who invented Blockchain technology
Hi, I am wondering to find more about the Blockchain technology and the person put their mind in inventing Blockchain. Who invented blockchain technology? In want to know when it was invented and why? Thank
July 8, 2018 at 8:10 AM

What is blockchain technology
Hi, People are taking about Blockchain these days and there is many jobs in the IT field. So, I am wondering what is this? What is blockchain technology? Thanks
July 8, 2018 at 7:52 AM

How specify the version of python that spark-submit uses
Hi, I have installed python 3.7 and want to use with spark. How specify the version of python that spark-submit uses? Thanks
June 25, 2018 at 7:30 AM

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restart elasticsearch service centos
Hi I have elasticsearch server on Centos. How to restart elasticsearch service centos? Thanks
June 25, 2018 at 3:47 AM

mapr db truncate table
Hi, I want to truncate mapr db table. I have a JSON table with many records and application is in testing stage. How to truncate mapr JSON table? Thanks
June 12, 2018 at 4:58 AM

change kerberos principal password
How to change the password of a pricipal? My principal is abcd/mydomain.com What is the command of it? Thanks
June 11, 2018 at 4:08 AM

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How is Python and machine learning related to the IoT
Hi, I just wanted to know the connection between Python, machine learning and IoT. How is Python and machine learning related to the IoT? Thanks
June 3, 2018 at 6:32 PM

How to check if ZooKeeper is running or up from command prompt
Hi, I want to see if the ZooKeeper is running or not on my Hadoop cluster. How to check if ZooKeeper is running or up from command prompt? Thanks
May 23, 2018 at 12:28 AM

rename index in elasticsearch
How to rename index in elasticsearch? I have an index with millions of records in it. I want to rename this index to another name. There is some business requirement to rename it. What is the command to rename index in elasticsearch?
May 18, 2018 at 1:17 AM

how to get number of shards in elasticsearch
Hi, I have elastic search server and I want to get the details of shards for each index. how to get number of shards in elasticsearch? Thanks
May 17, 2018 at 1:36 AM

hadoop_home or hadoop.home.dir are not set eclipse
Hi, I am running an application in Eclipse. I have set HADOOP_HOME correctly in Ubuntu and can see the values with the command: echo $HADOOP_HOME But eclipse is not detection it and
May 16, 2018 at 12:50 AM

Add jars to a Spark Job spark-submit
Add jars to a Spark Job spark-submit I want to submit some dependency jars along with the code jar file with spark-submit. How to add jar to the Spark Job Submit process? Thanks
May 1, 2018 at 4:34 AM

What is a Big Data Hadoop consultant
Hi, What is a Big Data Hadoop consultant? What are there role? Thanks
April 30, 2018 at 10:28 AM

Will Spark overtake Hadoop
Hi, Will Spark overtake Hadoop? Spark is very popular and much faster then MapReduce. So, can it replace Hadoop? Thanks
April 30, 2018 at 10:06 AM

What is the equivalent of MapReduce reducer in spark
Hi, What to use for MapReduce in Spark? What is the equivalent of MapReduce reducer in spark? Thanks
April 30, 2018 at 9:58 AM

What makes Spark faster than MapReduce?
Hi, What makes Spark faster than MapReduce? Thanks
April 30, 2018 at 9:49 AM

What is RDD in spark
Hi, I am new to Spark programming and when I started learning i encountered RDD first. What is RDD in spark? Thanks
April 30, 2018 at 9:13 AM

is rdd mutable
Hi, I am new to Spark programming and I am not able to see any way to modify the data of RDD. is rdd mutable? Thanks
April 30, 2018 at 9:09 AM

how to create rdd in pyspark
Hi, I am have to create an RDD from a String in PySpark. How to do this? How to create rdd in pyspark?
April 30, 2018 at 9:03 AM

spark-core_2.11 maven dependency
Hi, I want to create Spark Application and need maven dependency to add into pom.xml file of the project. Where can I find spark-core_2.11 maven dependency jar files? What is the way to add spark-core_2.11 maven dependency
April 27, 2018 at 10:26 AM

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