introduction to nosql with couchbasefiles.meetup.com/18258964/introduction to nosql...

Introduction to NoSQL with Couchbase Couchbase Meetup – Bangalore

#cbmeetupblr

About the Speaker

•  Clarence J M Tauro – [email protected] –  @javapsyche on Twitter –  Senior Instructor, Couchbase –  ~11 Years Professional Teaching and Consulting Experience –  PhD in Computer Science from Christ University [thesis

accepted] –  Hard-core Dog lover

Disclaimer

•  Disclaimer: The views expressed in this presentation are our own and do not necessarily reflect the views of Couchbase

Objectives

•  Introduction to NoSQL •  Are ACID Properties always desirable? •  Basically available, Soft state, Eventually consistent

(BASE) •  The CAP Theorem •  Introducing Couchbase •  Couchbase Operations

Introduction

RDBMS - predominant technology for storing structured data in web and business applications

“one size fits all” - thinking concerning data-stores has been questioned Apply NoSQL databases for the persistence layer/Polyglot Programming

ACID Properties

• ATOMICITY

• CONSISTENCY

•  ISOLATION

• DURABILITY

Are ACID Properties always desirable?

•  ... But what about: –  Latency –  Partition Tolerance –  High Availability –  Scalability

the system is available, but not

necessarily all items in it at any given

point in time

after a certain time all nodes are consistent, but

at any given time this might not be the case

information (state) the user put into the system that will go

away if the user doesn't maintain it

BASE

NoSQL Common Traits

•  Non-relational •  Schema-free/Schema-on-read •  Eventual consistency •  Open source •  Distributed •  “web-scale”

The CAP Theorem

•  Consistency – can all nodes see identical data, at all times?

•  Availability – can all nodes be read from and written to, at all times?

•  Partition Tolerance – will nodes function normally, even when the cluster breaks?

Consistency

Partition Tolerance

Availability

CHOOSE ANY TWO

The CAP Theorem

•  CP: Consistency and Partition Tolerance -  Immediately consistent data across a horizontally scaled

cluster, even with network problems -  Couchbase

•  AP: Availability and Partition Tolerance -  Always services requests, across multiple data centers,

even with network problems, data eventually consistent -  Apache HBase or Cassandra, Couchbase (XDCR)

•  CA: Consistency and Availability -  Always services requests with immediately consistent

data, in a vertically scaled system -  MySQL, Oracle, Microsoft SQL Server

What do you do with the Data?

Operational Use •  Real time intelligence •  Focus on data flows and

processes •  Extremely fast (in-

memory) reads •  Extremely fast (log

append) writes •  Improve the current

outcome

Analytical Use •  Batched workloads •  Vast data aggregations •  Retrospective analyses •  Focus on data pools •  Improve future outcomes

Hadoop and NoSQL

Operational Velocity Analytical Volume

Real-time operational database systems

improve current outcomes

Batch-oriented analytical database systems improve future outcomes

Hadoop NoSQL

Types of NoSQL

•  Key-value stores •  Wide Column stores •  Document stores •  Graph databases

Key-Value Stores

•  The most common; not-necessarily the most popular •  Key and a simple value -  Speed -  Scale -  Simplicity •  Find simple values by key extremely fast

Clarence user::1234

Melisa user::1235

Michael user::1236

Document Stores

•  Key and a structured value (document) -  Speed -  Scale -  Flexibility •  Read/write ever-changing data about people, places,

and things, at cloud-scale

user::1234 { name: 'Frank', age: 37, kids: ['Sue', 'Ann', 'Bob'] }

user::1235 { name: 'Carolyn', age: 56, kids: ['Tina'] }

user::1236 { name: 'Tessa', age: 24}

Wide Column Stores

•  Key and nested set of tuples -  Write vast volumes of data, with eventually consistent

read access

user::1234

name: text Frank

age: number 37

kid: text

Sue

Ann

Bob

user::1235

name: text Carolyn

age: number 56

kid: text Tina

Graph Databases

•  Linked list of keyed objects -  Relationships •  Monitor complex, dynamically networked connections

user::1234 Frank

37

Sue

Ann

Bob

user::1235

Carolyn 56

Tina

user::1236 Tessa

24

Polyglot Programming

•  Enterprise will have a variety of different data storage technologies for different kinds of data

•  We need to ask how we want to manipulate the data. This will help us figure out which persistence technologies are appropriate -  User Sessions: Couchbase (Memcached)/Redis -  Financial Data: RDBMS -  Shopping Cart: Riak/Couchbase (Memcached) -  Recommendation Systems: Neo4J -  Product Catalog: Couchbase/MongoDB -  Reporting: RDBMS/Couchbase Views -  Analytics: Couchbase/Cassandra

History of Couchbase

NorthScale developed a key-value storage engine

Apache CouchDB database project

Membase and CouchOne joined forces in February 2011 to create Couchbase, the first and only provider

of a comprehensive, end-to-end family of NoSQL database products

What is Couchbase Server?

•  Couchbase Server •  Is a “document” database solution •  Has key/value based orientation •  Is geared for JSON •  Has no tables and no fixed schema •  Runs on a networked cluster of nodes •  Is highly scalable •  Is lightning fast read/write •  Has caching and persistence layers •  Automatically fails-over

•  Couchbase Server is best suited for fast-changing data items of relatively small size

JavaScript Object Notation

{ "firstName": "Clarence", "lastName": "Tauro", "age": 25, "address": { "streetAddress": "21 2nd Street", "city": "Bangalore", "state": "KA", "postalCode": "560059" }, "phoneNumber": [ { "type": "home", "number": "988 621-‐7674" } ] }

JSON is a lightweight data-interchange format easy for humans to read and

write

What is a Couchbase Document?

{ "visibility": "PRIVATE", "name": "Eclectic Summer Mix", "userName": "suzyqrocks", "type": "org.couchmusic.domain.Playlist", "created": 1422138028037, "updated": 1422138028072, "tracks": [] }

{ "id": "playlist:12345", "rev": "1-‐0004ebc0000000000", "flags": 0, "expiration": 0, "type": "json" }

Document Content

(Most recent in RAM and persisted to disk)

Document Metadata

(All keys unique and kept in RAM)

Couchbase Server Architecture

•  Technology Stack for Data Manager:   Couchbase Client SDK (“Smart Client”)   Client Query API1 and Query Engine (Views)   Cache Layer: RAM Cache   Persistence Layer: Couchbase


•  Technology Stack for Cluster Manager:   Node Level – multiple vBuckets

•  Default 1024 vBuckets/number of nodes   Cluster Level – multiple nodes (with 1 .. * buckets)1

  Datacenter Level – multiple clusters (optional XDCR)2

  Erlang (cluster management and process supervision)3


Anatomy of a Couchbase Application

Couchbase Client Software

Cluster Map

NS Server EP Engine

NS Server EP Engine

NS Server EP Engine

{Server List} 1. REST request 8091

5. Create, Read, Update and Delete Documents

Becomes a Smart Client

3 3 2 Managed Cache

Dis

k Q

ueue

Disk

Replication Queue

App Server

Doc 1 Doc 1

Doc 1

To other node

Single Node – Couchbase Write Operation

Couchbase Server Node

3 3 2 Managed Cache

Dis

k Q

ueue

Replication Queue

App Server

Doc 1’

Doc 1

Doc 1’ Doc 1

Doc 1’

Disk

To other node

Single Node – Couchbase Update Operation


GET

D

oc 1

3 3 2

Dis

k Q

ueue

Replication Queue

App Server

Doc 1

Doc 1 Doc 1

Managed Cache

Disk

To other node

Single Node – Couchbase Read Operation


3 3 2

2

Dis

k Q

ueue

Replication Queue

App Server


Doc 1

Doc 6 Doc 5 Doc 4 Doc 3 Doc 2

Doc 1


Managed Cache

Disk

To other node

Single Node – Couchbase Cache Eviction

3 3 2

2

Dis

k Q

ueue

Replication Queue

App Server


Doc 1

Doc 3 Doc 5 Doc 2 Doc 4


Doc 4

GET

D

oc 1

Doc 1

Doc 1

Managed Cache

Disk

To other node

Single Node – Couchbase Cache Miss

Other – New Features of Couchbase 4.0

•  Multi-dimensional Scaling •  N1QL •  GSI •  XDCR

Goodies!

•  Tweet about this event with -  #cbmeetupblr -  @couchbase or #couchbase -  @javapsyche

•  The person with the maximum retweets receives a special goodie in the next meetup

Training

Get Started with Couchbase Server 4.0: www.couchbase.com/beta

Get Trained on Couchbase: http://training.couchbase.com

CD220: Developing Couchbase NoSQL Applications Oct 13 – Oct 15 2015

CS300: Couchbase NoSQL Server Administration

Sep 28 – Oct 1

Enroll Today!

Questions?