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Real time big data with Apache Kafka, Spark Streaming, Scala, Elastic search.

By

S Annu Ahmed(122N1A0573)

V Indu Priyanka(122N1A0532)

S Ravindra(122N1A0572)

M Imran Basha(122N1A0556)

P B Sravanthi(122N1A0558)

B Baby Likhitha(122N1A0514)

Contents:• Overview of project • What is Big Data ?• Hadoop• Apache Kafka• Scala• Spark Streaming• Elastic Search

What is Data ? “A set of values that may be Qualitative or Quantitate in nature”What is Big Data ? “Data so large and voluminous that it overwhelms the existing data storage and processing infrastructure, is said to be big enough to be called as-Big data” What is Real time Big Data ? “ Hadoop is engineered for big data analytics, but it's not real time. NoSQL is engineered for real-time big data, but it's operational rather than analytical. NoSQL together with Hadoop is the key to real time big data”

Parameters to use big data: Huge amount of data Complex data which consists of lots of unstructured data Speed of generating data

What We Need ?Fault TolerantFailure DetectionFast - low latency, distributed, data localityMasterless, Decentralized Cluster MembershipDataCentersPartition-AwareElasticity•Parallelism

Apache Hadoop is an open source framework for distributed storage and processing of large sets of data on commodity hardware.

ECO SYSTEM:

Hadoop

Let’s recall basic concepts ofMessaging System

Point to Point Messaging (Queue)

Publish-Subscribe Messaging (Topic)

Apache Kafka

Overview An apache project initially developed at LinkedIn Distributed publish-subscribe messaging system• Designed for processing of real time activity stream data e.g. logs,

metrics collections• Written in Scala Features

Persistent messaging High-throughput Supports both queue and topic semantics Uses Zookeeper for forming a cluster of nodes

(producer/consumer/broker)and many more…

Real time transfer

Consumer3

(Group2)Kafka Broker

Consumer4

(Group2)

Producer

Zookeeper

Consumer2

(Group1)

Consumer1

(Group1)

get K

afka

brok

er

addr

ess

Streaming

Fetch messages

Update ConsumedMessage offset

QueueTopolog

y

Topic Topolog

y

Kafka Broker

Broker does not Push messages to Consumer, Consumer Polls messages from Broker.

About Apache Spark

Initially started at UC Berkeley in 2009

Fast and general purpose cluster computing system

10x (on disk) - 100x (In-Memory) faster

Most popular for running Iterative Machine Learning Algorithms.

Provides high level APIs in

Java

Scala

Python

Integration with Hadoop and its eco-system and can read existing data.

So Why Spark ?

Hadoop execution flow

Spark execution flow

• Most of Machine Learning Algorithms are iterative because each iteration can improve the results

• With Disk based approach each iteration’s output is written to disk making it slow

Resilient Distributed Dataset (RDD)

•Fault Tolerant: can recalculate from any point of failure

•Created through transformations on data (map,filter..) or other RDDs

•Immutable

•Partitioned

•Indicate which RDD elements to partition across machines

based on a key in each record

•Can be reused

Spark Streaming

Makes it easy to build scalable fault-tolerant streaming applications.

Ease of UseFault ToleranceCombine streaming with batch and interactive

queries.

zillions of bytes gigabytes per second

Spark Streaming

Input & Output Sources

Spark Streaming

Kinesis, S3

• Functional• Object oriented programming

• On the JVM

• Static typing - easier to control performance

Why Scala?

Scala Scala has been created by Martin Odersky and he

released the first version in 2001 Scala is the language that addresses the major needs of

the modern developer. It is a statically typed, mixed-paradigm, JVM language

with a succinct, elegant, and flexible syntax, a sophisticated type system, and idioms that promote scalability from small , interpreted scripts to large, sophisticated applications.

Continued…. Scala is compelling because it feels like a dynamically

typed scripting language, due to its succinct syntax and type inference.

Yet Scala gives you all the benefits of static typing, a modern object model, functional programming, and an advanced type system.

Scala's aim to provide advanced constructs for the abstraction and composition of components is shared by several recent research efforts.

What is elasticsearch? In short, it can be thought of as “search engine software” It provides the realistic potential for you to run your own search engine

service (like a Bing or a Google) but with say, private, sensitive, or confidential data/documents that you don’t want on the public web

great extra capability for your company, enterprise, app, startup, client elasticsearch is an open-source, distributed web application that runs on

top of Lucene, and it is written in Java, and it sports a REST API Apache Lucene is the best open-source search engine, and probably one

of the best search engines available, and holds its own even when compared against the most expensive commercial alternatives

very fast search

Where did elasticsearch come from?

Originally there was a search application project called Apache Compass, which was primarily worked on by @kimchy

Compass also relied on Lucene, but was not distributed kimchy decided to write elasticsearch to be distributed from the

get go, and so you could say it was built with the cloud in mind Add more servers and they play together nicely, and they know

how to work together to split up the work load (and search queries can be resource intensive and expensive in terms of memory/disk requirements)

Elastic search is an advanced distributed app

It has some very cool properties and abilities when it comes to operations that involve lots of nodes

It scales extremely gracefully It has its own optimized binary protocol and makes its

own “internal network” …as long as you know what you are doing when it

comes to configuration It is open source