Recent questions tagged developer

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What metadata is stored on a DataNode when a block is written to it?

Jul 23, 2018 in Big Data Hadoop by Meci Matt
 • 9,460 points • 3,161 views
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Importing a portion of Relational Database to HDFS

Jul 20, 2018 in Big Data Hadoop by Meci Matt
 • 9,460 points • 1,918 views
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How can Hadoop discover missing or corrupt HDFS data?

Jul 19, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 1,464 views
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How the FIFO Scheduler arbitrates the cluster resources for a job and its tasks?

Jul 19, 2018 in Big Data Hadoop by Meci Matt
 • 9,460 points • 1,032 views
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Sqoop Metastore ?

Jul 19, 2018 in Big Data Hadoop by shams
 • 3,670 points • 1,329 views
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How does HDFS Federation help HDFS Scale horizontally?

Jul 12, 2018 in Big Data Hadoop by Meci Matt
 • 9,460 points • 1,409 views
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How to avoid a “split-brain” scenario with NameNodes?

Jul 11, 2018 in Big Data Hadoop by Meci Matt
 • 9,460 points • 4,550 views
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How Namenode handles data node failures?

Jul 11, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 6,326 views
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1 answer

Kafka topic not being deleted

Jul 9, 2018 in Apache Kafka by Shubham
 • 13,490 points • 3,089 views
+1 vote
8 answers

How to print the contents of RDD in Apache Spark?

Jul 6, 2018 in Apache Spark by Shubham
 • 13,490 points • 61,886 views
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2 answers

How to use RDD filter with other function?

Jul 5, 2018 in Apache Spark by Shubham
 • 13,490 points • 9,769 views
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1 answer

How to add third party java jars for use in PySpark?

Jul 4, 2018 in Apache Spark by Shubham
 • 13,490 points • 8,724 views
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Difference between sparkContext, JavaSparkContext, SQLContext, & SparkSession?

Jul 4, 2018 in Apache Spark by Shubham
 • 13,490 points • 5,375 views
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1 answer

Hadoop Nodes for Multiple Disks

Jul 3, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 1,982 views
+1 vote
1 answer

map vs mapValues in Spark

Jun 29, 2018 in Apache Spark by Shubham
 • 13,490 points • 16,105 views
+1 vote
3 answers

Which cluster type should I choose for Spark?

Jun 27, 2018 in Apache Spark by Shubham
 • 13,490 points • 1,627 views
+2 votes
14 answers

How to create new column with function in Spark Dataframe?

Jun 26, 2018 in Apache Spark by coldcode
 • 2,090 points • 88,951 views
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Which is better in term of speed, Shark or Spark?

Jun 26, 2018 in Apache Spark by Shubham
 • 13,490 points • 946 views
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How to analyze block placement on datanodes and rebalancing data across Hadoop nodes?

Jun 21, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 1,002 views
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1 answer

Spark Driver roles

Jun 21, 2018 in Apache Spark by shams
 • 3,670 points • 1,084 views
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1 answer

Is there any way to setup Hadoop nodes (data nodes/namenodes) to use multiple volumes/disks?

Jun 20, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 978 views
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1 answer

Spark standalone client mode

Jun 20, 2018 in Apache Spark by shams
 • 3,670 points • 1,067 views
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1 answer

Ways to create RDD in Apache Spark

Jun 19, 2018 in Apache Spark by Shubham
 • 13,490 points • 4,084 views
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3 answers

Lineage Graph in Spark

Jun 19, 2018 in Apache Spark by Data_Nerd
 • 2,390 points • 11,876 views
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1 answer

Minimizing Data Transfers in Spark

Jun 19, 2018 in Apache Spark by shams
 • 3,670 points • 1,408 views
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1 answer

How RDD persist the data in Spark?

Jun 18, 2018 in Apache Spark by kurt_cobain
 • 9,350 points • 1,413 views
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1 answer

What do we mean by an RDD in Spark?

Jun 18, 2018 in Apache Spark by kurt_cobain
 • 9,350 points • 4,066 views
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1 answer

When running Spark on Yarn, do I need to install Spark on all nodes of Yarn Cluster?

Jun 14, 2018 in Apache Spark by Shubham
 • 13,490 points • 6,306 views
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1 answer

Different Hadoop Modes

Jun 13, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 13,108 views
0 votes
1 answer

SQLInterpreter in Spark

Jun 7, 2018 in Apache Spark by shams
 • 3,670 points • 762 views
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1 answer

Different Spark Ecosystem

Jun 4, 2018 in Apache Spark by shams
 • 3,670 points • 900 views
0 votes
1 answer

InputSplit vs HDFS Block

Jun 1, 2018 in Big Data Hadoop by shams
 • 3,670 points • 4,459 views
0 votes
1 answer

How does partitioning work in Spark?

May 31, 2018 in Apache Spark by coldcode
 • 2,090 points • 1,236 views
+1 vote
8 answers

How to replace null values in Spark DataFrame?

May 31, 2018 in Apache Spark by kurt_cobain
 • 9,350 points • 75,464 views
0 votes
1 answer

How to convert rdd object to dataframe in spark

May 30, 2018 in Apache Spark by Shubham
 • 13,490 points • 3,978 views
0 votes
1 answer

Is there any way to uncache RDD?

May 30, 2018 in Apache Spark by kurt_cobain
 • 9,350 points • 1,731 views
0 votes
1 answer

Sqoop vs distCP

May 30, 2018 in Big Data Hadoop by shams
 • 3,670 points • 1,346 views
0 votes
1 answer

NameNode without any data

May 29, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 1,311 views
0 votes
1 answer

What is the difference between Apache Spark SQLContext vs HiveContext?

May 26, 2018 in Apache Spark by Shubham
 • 13,490 points • 4,629 views
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1 answer

How to find max value in pair RDD?

May 26, 2018 in Apache Spark by kurt_cobain
 • 9,350 points • 8,013 views
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1 answer

Is it better to have one large parquet file or lots of smaller parquet files?

May 23, 2018 in Apache Spark by Shubham
 • 13,490 points • 13,783 views
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What's the difference between 'filter' and 'where' in Spark SQL?

May 23, 2018 in Apache Spark by kurt_cobain
 • 9,350 points • 34,474 views
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1 answer

out of Memory Error in Hadoop

May 22, 2018 in Big Data Hadoop by coldcode
 • 2,090 points • 1,839 views
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1 answer

When is the reduce tasks start in Hadoop?

May 22, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 3,757 views
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1 answer

Is a HDFS block sequential ?

May 21, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 1,631 views
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1 answer

Is there any way to pull data from Mainframe to Hadoop?

May 21, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 2,563 views
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1 answer

Sqoop vs Oracle Hadoop Connectors

May 18, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 960 views
0 votes
1 answer

Can we use Apache Mahout without Hadoop dependency?

May 17, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 1,105 views
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1 answer

How to install Hadoop in Ubuntu?

May 17, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 673 views
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1 answer

Hadoop combiners with aggregator functions

May 16, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 636 views
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