Hadoop is an open-source framework for distributed processing and storage of large datasets across clusters of commodity hardware. It allows for the parallel processing of large datasets across multiple nodes. Hadoop can store and process huge amounts of structured, semi-structured, and unstructured data from various sources quickly using distributed computing. It provides capabilities for fault tolerance, flexibility, and scalability.

1. HADOOP

2.  Large amount of Data .
 Big data is difficult to store , collect , maintain ,
Analyze and Visualize .
 Thus Big Data includes huge volume, high
velocity, and extensible variety of data. The data
in it will be of three types.
 Structured data: Relational data.
 Semi Structured data: XML data.
 Unstructured data: Word, PDF, Text, Media
Logs.
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3.  Black Box Data
 Social Media Data
 Stock Exchange Data
 Power Grid Data
 Transport Data
 Search engine Data
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5.  Open source framework that allows distributed
processing of large datasets on the cluster of
commodity hardware.
 Hadoop is a data management tool and uses scale
out storage .
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6.  Hadoop is sub-project of Lucene (a collection of
industrial-strength search tools), under the
umbrella of the Apache Software Foundation.
 Hadoop parallelizes data processing across many
nodes (computers) in a compute cluster, speeding
up large computations.
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8.  Ability to store and process huge amounts of any
kind of data, quickly
 Computing power
 Fault tolerance
 Flexibility
 Scalability
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9.  Namenode
 Datanode
 Secondary Namenode
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11.  Aggregation across large data sets: use the power
of Reducers!
 Large-scale ETL operations (extract, transform,
load)
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12.  Stand Alone
 Pseudo Distributed
 Fully Distributed
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13.  Scalable
 Cost effective
 Flexible
 Fast
 Resilient to failure
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14.  Ambari, Zookeeper (managing & monitoring)
 HBase, Cassandra (database)
 Hive, Pig (data warehouse and query language)
 Mahout (machine learning)
 Chukwa, Avro, Oozie, Giraph, and many more
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15.  www.google.com
 www.wikipedia.com
 www.studymafia.org
 www.projectsreports.org
 www.tutorialspoint.com