Redis is an open source, advanced key-value data store,Often referred to as a data structure server since keys can contain strings, hashes, lists, sets and sorted sets

1. REDIS: NOSQL DATA STORAGE
By
Abhijeet Shekhar
Everything and Anything I.T

2. Redis
 Redis is an open source, advanced
key-value data store
 Often referred to as a data structure server
since keys can contain strings, hashes, lists, sets
and sorted sets
 Redis works with an in-memory dataset
 Every second Redis can handle more than
100,000 Read/Write operations.
 It is possible to persist dataset either by
 dumping the dataset to disk every once in a while
 or by appending each command to a log

3. List of Databases
 Classical variant - store data in a relational
database
 MySQL
 PostgreSQL
 SQLite
 HSQLDB
 and many more...
 Modern trend in a Web programming:
store data in NoSQL databases

4. NoSQL(Not Only SQL)
"Any form of distributed system with state, of which
a distributed database is the canonical example,
can exhibit almost two of the properties desirable
Consistency, Availability and Persistence“
--By CAP theorem
NoSQL provides
 Storage
 Retrieval of data with less constrained,
 Simplicity of design,
 Horizontal scaling,
 Availability,
 Highly optimized ,
 Performance benefits in terms of latency and throughput.

5. Why NoSQL?
 Two trends:
 The exponential growth of the volume of data
generated by users and systems
 The increasing interdependency and complexity of
data, accelerated by the Internet, Web 2.0, social
networks, mobile, etc
 NoSQL databases are useful when working with a
huge quantity of data and the data's nature does
not require a relational model for the data
structure

6. Basic Concepts and Techniques
 CAP theorem (Consistency, Availability, Partition
tolerance)
 ACID (Atomicity, Consistency, Isolation and Durability)
 BASE (Basically Available, Soft State, Eventual
consistency)

7. Categories of NoSQL storages
 Key-Value
 memcached
 Redis
 Column Family
 Cassandra
 Document
 MongoDB
 Tabular
 BigTable, HBase
 Graph, XML, Object, Multivalued,…

8. NoSQL Classification by feature
Data Model Performance Scalability Flexibility Complexity Functionality
Relational
Database
variable variable low moderate
relational
algebra.
Key–value
Stores
high high high none
variable
(none)
Graph
Database
variable variable high high graph theory
Document
Store
high
variable
(high)
high low
variable
(low)
Column Store high high moderate low minimal

9. Redis Architecture

10. Some Redis commands
$ redis-cli set mykey "my binary safe value"
$ ok
$ redis-cli get mykey
my binary safe value

11. List of Redis Clients
 PHP,
 Java,
 Python,
 Ruby,
 Perl,
 Scala,
 TCL,
 C, C++,Objective C, Node.js,
 Many more…

12. Redis Use Case
 Show latest items listings in your home page.
 Deletion and filtering.
 Leaderboards and related problems
 Queues
 Real time analysis of what is happening, for
stats, anti spam, or whatever.
 Caching
 Many more…

13. Who is using Redis?

14. Thanks 