I am trying to use Kafka's RoundRobinPartitioner class for distributing messages evenly across all the partitions. My Kafka topic configuration is as ...
I am trying to use Kafka's RoundRobinPartitioner class for distributing messages evenly across all the partitions. My Kafka topic configuration is as ...
I recently read an article that described how to custom partition a dataframe [ https://dataninjago.com/2019/06/01/create-custom-partitioner-for-spark ...
I have a topic with 10 partitions, and I have generate events with A,B,C,D,E,F,G,H,I 9 different keys. I've observed messages doing this: There a ...
To reduce shuffling during the joining of two RDDs, I decided to partition them using HashPartitioner first. Here is how I do it. Am I doing it correc ...
I have a dataset which I want to write sorted into parquet files for getting benefit of requesting these files afterwards over Spark including Predica ...
Suppose my mappers output N keys (these keys are different), and I have K reducers. How to write custom Paritioner so that each reducer receive approx ...
I am trying to process numbers as fast as possible with C# app. I use a Thread.Sleep() to simulate a processing and random numbers. I use 3 different ...
How to configure a custom partitioner on oozie workflow XML for a MapReduce Action? I tried using: ...
I was using spark-shell to experiment with Spark's HashPartitioner. The error is shown as follows: The second operation failed while the third oper ...
I was looking for java client (Kafka Consumer) to consume the messages from multiple brokers. please advice Below is the code written to publish the ...
As per Spark documentation only RDD actions can trigger a Spark job and the transformations are lazily evaluated when an action is called on it. I s ...
i'm pretty confused about the MapReduce Framework. I'm getting confused reading from different sources about that. By the way, this is my idea of a Ma ...
I am new in hadoop and mapreduce partitioner.I want to write my own partitioner and i need to read a file in partitioner. i have searched many times a ...
I am a newbie to MapReduce and I just can't figure out the difference in the partitioner and combiner. I know both run in the intermediate step betwee ...
I have use case that has data of employee of a company of different age group. I need to find highest salary of male and female employee of three age ...
I am trying to code one MapReduce scenario in which i have created some User ClickStream data in the form of JSON. After that i have written Mapper cl ...
As I am new to hadoop,I tried out the sample code from http://www.tutorialspoint.com/map_reduce/map_reduce_partitioner.htm I found that the program us ...
While learning Hadoop MapReduce, I came across how to create a custom Partitioner class. I understand that we need to define the abstract getPartition ...
Based on this example here, this works. Have tried the same on my dataset. Sample Dataset: Consider each line as string, my Mapper output is: ...
I use Hadoop total order partitioner and random sampler as input sampler. But when I increase my slave nodes and reduce tasks to 8, I get following ...