Thomas Weise <thomas@datatorrent.com>Dec 2nd, 2015

Introduction to Open Source Unified Streaming and Fast Batch PlatformApache Apex (incubating)

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Apex Platform Overview

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Apache Malhar Library

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Native Hadoop Integration

• YARN is the resource manager

• HDFS used for storing any persistent state

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Application Programming Model

A Stream is a sequence of data tuplesAn Operator takes one or more input streams, performs computations & emits one or more output streams

• Each Operator is YOUR custom business logic in java, or built-in operator from our open source library• Operator has many instances that run in parallel and each instance in single-threaded

Directed Acyclic Graph (DAG) is made up of operations and streams

Directed Acyclic Graph (DAG)

Filtered Stream

Output StreamTuple Tuple

Filtered Stream

Enriched Stream

Enriched

Stream

er

Operator

er

Operator

er

Operator

er

Operator

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Application Specification

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Partitioning and Scaling Out

• Operators can be dynamically scaled• Flexible Streams split• Parallel partitioning

• MxN partitioning • Unifiers

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Advanced Windowing Support

Application window Sliding window and tumbling window

Checkpoint window No artificial latency

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Guarantees and PerformanceStateful Fault Tolerance Processing Semantics Data Locality

Supported out of the box– Application state– Application master state– No data loss

Automatic recovery Lunch test Buffer server

At least once At most once Exactly once

Stream locality for placement of operators

Rack local – Distributed deployment

Node local – Data does not traverse NIC

Container local – Data doesn’t need to be serialized

Thread local – Operators run in same thread

Data locality

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Dynamic Updates Dynamic topology updates

– Properties of operators can be changed– New operators can be added

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Data Processing Pipeline ExampleApp Builder

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Data Processing Pipeline ExampleLogical Plan

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Data Processing Pipeline ExamplePhysical Plan

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Data Processing Pipeline ExampleReal Time Visualization

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ResourcesApache Apex Community Page - http://apex.incubator.apache.org/

Apache Apex LinkedIn Group

EndThank You!

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