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You're reading from  Mastering Apache Storm

Product typeBook
Published inAug 2017
Reading LevelExpert
Publisher
ISBN-139781787125636
Edition1st Edition
Languages
Java
Tools
StormHadoop
Concepts
Data Processing
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Author (1)
Ankit Jain
Ankit Jain
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Ankit Jain

Ankit Jain holds a bachelor's degree in computer science and engineering. He has 6 years, experience in designing and architecting solutions for the big data domain and has been involved with several complex engagements. His technical strengths include Hadoop, Storm, S4, HBase, Hive, Sqoop, Flume, Elasticsearch, machine learning, Kafka, Spring, Java, and J2EE. He also shares his thoughts on his personal blog. You can follow him on Twitter at @mynameisanky. He spends most of his time reading books and playing with different technologies. When not at work, he spends time with his family and friends watching movies and playing games.
Read more about Ankit Jain

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Distributed RPC

Distributed RPC is used to query on and retrieve results from Trident topology on the fly. Storm has an in-built distributed RPC server. The distributed RPC server receives the RPC request from the client and passes it to the Storm topology. The topology processes the request and sends the result to the distributed RPC server, which is redirected by the distributed RPC server to the client.

We can configure the distributed RPC server by using the following properties in the storm.yaml file:

drpc.servers: 
     - "nimbus-node"

Here, nimbus-node is the IP of the distributed RPC server.

Now, run this command on the nimbus-node machine to start the distributed RPC server:

> bin/storm drpc

Let's assume we are storing the count aggregation of hello world Trident topology in a database and want to retrieve the count for a given country on the fly. We would need to use the distributed RPC feature to achieve this. This example shows how we can incorporate the distributed RPC in the...

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Mastering Apache Storm
Published in: Aug 2017Publisher: ISBN-13: 9781787125636
© 2017 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Ankit Jain

Ankit Jain holds a bachelor's degree in computer science and engineering. He has 6 years, experience in designing and architecting solutions for the big data domain and has been involved with several complex engagements. His technical strengths include Hadoop, Storm, S4, HBase, Hive, Sqoop, Flume, Elasticsearch, machine learning, Kafka, Spring, Java, and J2EE. He also shares his thoughts on his personal blog. You can follow him on Twitter at @mynameisanky. He spends most of his time reading books and playing with different technologies. When not at work, he spends time with his family and friends watching movies and playing games.
Read more about Ankit Jain

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