This document discusses big data and Hadoop. It defines big data as very large and complex datasets that are difficult to process using traditional methods. It then lists some of the challenges of big data like storage, processing speed, and cost. The document introduces Hadoop as an open-source framework that can address these challenges by allowing distributed storage and processing of large datasets across commodity hardware. It provides a high-level overview of how Hadoop works, including its core components HDFS for storage and MapReduce for distributed processing.

1. Yalla Ramisetty (Day-1)
yalla4u@gmail.com

2.  What is BigData ?
 What is Hadoop ?
 How Hadoop helps to achieve Bigdata
problem ?

3.  Big data is a broad term for data sets so large
or complex that traditional data
processing applications are inadequate.
 Challenges include analysis,
capture, curation, search, sharing, storage,
transfer, visualization, and information
privacy.
** credits : www.wikipedia.com**

8.  How to store huge data sets ?
 Processing Speed ?
 Cost of processing frame work ?
 Cost of Infrastructure ?
 Need of Simple Abstract modules ?
 Ease of development.
Need of an unified Framework  Hadoop

10. • Hadoop:
• An open-source software framework that supports data-
intensive distributed applications, licensed under the Apache
v2 license.
• Goals / Requirements:
• Abstract and facilitate the storage and processing of large
and/or rapidly growing data sets
• Structured and non-structured data
• Simple programming models
• High scalability and availability
• Use commodity (cheap!) hardware with little redundancy
• Fault-tolerance
• Move computation rather than data

13. OS
Processing
layer
Data
layer
Normal-PC
Disk
HDFS
Disk Disk Disk
Node Node Node
Shared File System
OS
MR
OS
MR
OS
MR

14. HDFS
Processing
layer
Data
layer
Disk
HDFS
Disk
Disk Disk
DataNode DataNode DataNode
Shared FileSystem
NameNode
DataNode
daemon
DataNode
daemon
DataNode
daemon
NameNode
daemon
Client

15. HDFS
Processing
layer
Data
layer
Disk
HDFS
Disk
Disk Disk
TaskTrackerNode
TTNode
Shared File System
JobTrackerNode
DataNode
daemon
DataNode
daemon
DataNode
daemon
NameNode
daemon
Client
TTNode
JobTracker
daemon
TaskTracker
daemon
TaskTracker
daemon
TaskTracker
daemon
TaskTracker
daemon
DataNode
daemon

17. bench
S S S S S S
bench
S S S S S S
bench
S S S S S S
bench
S S S S S S
bench
S S S S S S
Class Room Cluster
Rack
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Rack
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Rack
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Rack
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Rack
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Switch
Student
Leader/Master

18. BigFile