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Presented by NIKHIL P L

Apache Hadoop

• Developer(s) : Apache Software Foundation

• Type : Distributed File System• License : Apache License 2.0• Written in : Java• O S : Cross platform• Created by : Doug Cutting (2005)• Inspired by: Google’s MapReduce, GFS

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Sub projects

• HDFS– distributed, scalable, and portable file system– Store large data sets– Cope with hardware failure– Runs on top of the existing system

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HDFS - Replication

• Blocks with data are replicated to multiple nodes

• Allow for node failure without data loss

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Sub projects .

• MapReduce– Technology from Google– Hadoop's fundamental data filtering algorithm– Map and Reduce functions– Useful in a wide range of application• distributed pattern-based searching, distributed

sorting, web link-graph reversal, machine learning, statistical machine translation.

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MapReduce - Workflow

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Hadoop cluster (Terminology)

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Types of Nodes

• HDFS nodes– NameNode (Master)– DataNode (Slaves)

• MapReduce nodes– Job Tracker (Master)– Task Tracker (Slaves)

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Types of Nodes .

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Sub projects ..

• Hive– providing data summarization, query, and analysis– initially developed by Facebook

• Hbase– open source, non-relational, distributed database– Providing Google BigTable-model database -like

capabilities

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Sub projects …

• Zookeeper– distributed configuration service, synchronization

services, notification systems and naming registry for large distributed systems.

• Pig– A language and compiler to generate Hadoop

programs– Originally developed at Yahoo!

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How does Hadoop works? .

• HDFS Works

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How does Hadoop works? ..

• MapReduce Works

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How does Hadoop works? …

• MapReduce Works

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How does Hadoop works? ….

• Managing Hadoop Jobs

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Applications

• Marketing analytics• Machin learning (eg: spam filters)• Image processing• Processing of XML messages

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• world's largest Hadoop production application• ~20,000 machines running Hadoop

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• the largest Hadoop cluster in the world with 100 PB of storage

• 1200 machines with 8 cores each + 800 machines with 16 cores each

• 32 GB of RAM per machine• 65 millions files in HDFS• 12 TB of compressed data added per day

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Other Users

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Thanks