Trending questions in Apache Spark

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Which is better in term of speed, Shark or Spark?

Spark is a framework for distributed data ...READ MORE

Jun 25, 2018 in Apache Spark by nitinrawat895
• 10,670 points
36 views
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1 answer

When not to use foreachPartition and mapPartition?

With mapPartion() or foreachPartition(), you can only ...READ MORE

Apr 30, 2018 in Apache Spark by Data_Nerd
• 2,360 points
2,323 views
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How RDD persist the data in Spark?

There are two methods to persist the ...READ MORE

Jun 18, 2018 in Apache Spark by nitinrawat895
• 10,670 points
178 views
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What do we mean by an RDD in Spark?

The full form of RDD is a ...READ MORE

Jun 18, 2018 in Apache Spark by nitinrawat895
• 10,670 points
175 views
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1 answer

Minimizing Data Transfers in Spark

Minimizing data transfers and avoiding shuffling helps ...READ MORE

Jun 19, 2018 in Apache Spark by Data_Nerd
• 2,360 points
142 views
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Spark Driver roles

A Spark driver (aka an application’s driver ...READ MORE

Jun 21, 2018 in Apache Spark by Ashish
• 2,630 points
42 views
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Spark standalone client mode

spark-submit \ class org.apache.spark.examples.SparkPi \ deploy-mode client \ master spark//$SPARK_MASTER_IP:$SPARK_MASTER_PORT ...READ MORE

Jun 20, 2018 in Apache Spark by Ashish
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83 views
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Is it mandatory to start Hadoop to run spark application?

No, it is not mandatory, but there ...READ MORE

Jun 14, 2018 in Apache Spark by nitinrawat895
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56 views
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What is Spark Piping?

Spark provides a pipe() method on RDDs. ...READ MORE

May 31, 2018 in Apache Spark by kurt_cobain
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533 views
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Persistence Levels in Spark

Spark has various persistence levels to store ...READ MORE

Jun 8, 2018 in Apache Spark by kurt_cobain
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87 views
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What is Shark?

Shark is a tool, developed for people ...READ MORE

Jun 8, 2018 in Apache Spark by kurt_cobain
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39 views
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Kafka Feature

Here are some of the important features of ...READ MORE

Jun 7, 2018 in Apache Spark by Data_Nerd
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79 views
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Difference between createOrReplaceTempView and registerTempTable

createOrReplaceTempView() creates/replaces a local temp view with the dataframe provided. Lifetime of this ...READ MORE

Apr 25, 2018 in Apache Spark by kurt_cobain
• 9,240 points
1,921 views
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Convert the given Spar rdd object to Spark DataFrame.

You can create a DataFrame from the ...READ MORE

Jun 5, 2018 in Apache Spark by Shubham
• 13,300 points
144 views
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SQLInterpreter in Spark

SQL Interpreter & Optimizer handles the functional ...READ MORE

Jun 7, 2018 in Apache Spark by kurt_cobain
• 9,240 points
62 views
0 votes
1 answer

Getting error while connecting zookeeper in Kafka - Spark Streaming integration

I guess you need provide this kafka.bootstrap.servers ...READ MORE

May 24, 2018 in Apache Spark by Shubham
• 13,300 points
620 views
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1 answer

Can anyone explain what is RDD in Spark?

RDD is a fundamental data structure of ...READ MORE

May 24, 2018 in Apache Spark by Shubham
• 13,300 points
602 views
0 votes
1 answer

Akka in Spark

Spark uses Akka basically for scheduling. All ...READ MORE

May 31, 2018 in Apache Spark by Data_Nerd
• 2,360 points
293 views
0 votes
1 answer

How to import the dependencies of Spark MLlib into eclipse project?

I would recommend you create & build ...READ MORE

May 31, 2018 in Apache Spark by Shubham
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284 views
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Parquet File

Parquet is a columnar format file supported ...READ MORE

Jun 4, 2018 in Apache Spark by Data_Nerd
• 2,360 points
102 views
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1 answer

Different Spark Ecosystem

Spark has various components: Spark SQL (Shark)- for ...READ MORE

Jun 4, 2018 in Apache Spark by kurt_cobain
• 9,240 points
76 views
0 votes
1 answer

Spark Machine Learning pipeline works fine in Spark 1.6, but it gives error when executed on Spark 2.x?

You need to change the following: val pipeline ...READ MORE

May 31, 2018 in Apache Spark by Shubham
• 13,300 points
95 views
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Hadoop mandatory for Spark?

No not mandatory, but there is no ...READ MORE

Jun 1, 2018 in Apache Spark by kurt_cobain
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40 views
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1 answer

Is there any way to uncache RDD?

RDD can be uncached using unpersist() So. use ...READ MORE

May 30, 2018 in Apache Spark by nitinrawat895
• 10,670 points
116 views
0 votes
1 answer

How does partitioning work in Spark?

By default a partition is created for ...READ MORE

May 31, 2018 in Apache Spark by nitinrawat895
• 10,670 points
65 views
0 votes
1 answer

How can I compare the elements of the RDD using MapReduce?

You have to use the comparison operator ...READ MORE

May 24, 2018 in Apache Spark by Shubham
• 13,300 points
369 views
0 votes
1 answer

What are the parameters in local[a,b,c] explains?

SparkContext.createTaskScheduler property parses the master parameter Local: 1 ...READ MORE

May 29, 2018 in Apache Spark by Shubham
• 13,300 points
87 views
0 votes
1 answer

Is it possible to run Spark and Mesos along with Hadoop?

Yes, it is possible to run Spark ...READ MORE

May 29, 2018 in Apache Spark by Data_Nerd
• 2,360 points
54 views
0 votes
1 answer

Spark 2.3? What is new in it?

Here are the changes in new version ...READ MORE

May 28, 2018 in Apache Spark by kurt_cobain
• 9,240 points
61 views
0 votes
1 answer

What is Sliding Window?

Sliding Window controls transmission of data packets ...READ MORE

May 28, 2018 in Apache Spark by nitinrawat895
• 10,670 points
29 views
0 votes
1 answer

How to set keys & access tokens for Twitter Spark streaming?

Either you have to create a Twitter4j.properties ...READ MORE

May 24, 2018 in Apache Spark by Shubham
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154 views
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cache tables in apache spark sql

Caching the tables puts the whole table ...READ MORE

May 4, 2018 in Apache Spark by Data_Nerd
• 2,360 points
771 views
0 votes
1 answer

How to stop messages from being displayed on spark console?

In your log4j.properties file you need to ...READ MORE

Apr 24, 2018 in Apache Spark by kurt_cobain
• 9,240 points
1,170 views
0 votes
1 answer

Efficient way to read specific columns from parquet file in spark

As parquet is a column based storage ...READ MORE

Apr 20, 2018 in Apache Spark by kurt_cobain
• 9,240 points
1,305 views
0 votes
1 answer

Is there any way to check the Spark version?

There are 2 ways to check the ...READ MORE

Apr 19, 2018 in Apache Spark by nitinrawat895
• 10,670 points
1,289 views
0 votes
1 answer

How to get the number of elements in partition?

rdd.mapPartitions(iter => Array(iter.size).iterator, true) This command will ...READ MORE

May 8, 2018 in Apache Spark by kurt_cobain
• 9,240 points
208 views
0 votes
1 answer

Why does sortBy transformation trigger a Spark job?

Actually, sortBy/sortByKey depends on RangePartitioner (JVM). So ...READ MORE

May 8, 2018 in Apache Spark by kurt_cobain
• 9,240 points
135 views
0 votes
1 answer

start-master and start-all?

sbin/start-master.sh : Starts a master instance on ...READ MORE

May 7, 2018 in Apache Spark by kurt_cobain
• 9,240 points
112 views
0 votes
1 answer

Spark Monitoring with Ganglia

Ganglia looks like a good option for ...READ MORE

May 4, 2018 in Apache Spark by kurt_cobain
• 9,240 points
245 views
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How is Apache Spark different from the Hadoop approach?

In Hadoop MapReduce the input data is ...READ MORE

May 7, 2018 in Apache Spark by BD Master
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How to get Spark dataset metadata?

There are a bunch of functions that ...READ MORE

Apr 26, 2018 in Apache Spark by kurt_cobain
• 9,240 points
400 views
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1 answer

Why is collect in SparkR slow?

It's not the collect() that is slow. ...READ MORE

May 3, 2018 in Apache Spark by Data_Nerd
• 2,360 points
95 views
0 votes
1 answer

Can I read a CSV represented as a string into Apache Spark?

You can use the following command. This ...READ MORE

May 3, 2018 in Apache Spark by kurt_cobain
• 9,240 points
59 views
0 votes
1 answer

Spark cannot access local file anymore?

By default it will access the HDFS. ...READ MORE

May 3, 2018 in Apache Spark by kurt_cobain
• 9,240 points
39 views
0 votes
1 answer

Why is Spark faster than Hadoop Map Reduce

Firstly, it's the In-memory computation, if the file ...READ MORE

Apr 30, 2018 in Apache Spark by shams
• 3,580 points
133 views
0 votes
1 answer

reduceByKey or reduceByKeyLocally , which should be preferred ?

Yes, they both merge the values using ...READ MORE

Apr 20, 2018 in Apache Spark by kurt_cobain
• 9,240 points
553 views
0 votes
1 answer

Spark Kill Running Application

you can copy the application id from ...READ MORE

Apr 25, 2018 in Apache Spark by kurt_cobain
• 9,240 points
151 views
0 votes
1 answer

Which query to use for better performance, join in SQL or using Dataset API?

DataFrames and SparkSQL performed almost about the ...READ MORE

Apr 19, 2018 in Apache Spark by kurt_cobain
• 9,240 points
119 views