Couch base

Syllabus 

What is CouchBase

What is CouchBase

COUCHBASE is a Document Oriented "NOSQL" Database having below features.

• Open Source
• Distributed
• Fault Tolerant
• Persistent  -  Storing data in memory and disc.
• Replicated

• Schema Free & Flexible(Document Size)
• High Performance
• Easy to scale.

Components :    4 nodes running Couch Base services

VBuckets are  nothing but  "PARTITIONS "

Example  VBucket

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FLOW  ->

JSON  Document  ->

                                  UNIQUE  KEY --->

                                                                    VBucket  ---------->

                                                                                                   Bucket --->  Node  ----> CLUSTER.

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Editions  Availability

->  Community (Free) and Enterprise Editions are available.

-->  Enterprise edition free for 2 nodes, support license required for large cluster.

-->  Administred via WEB UI, CLI or REST Ful API.

-->  Available for Windows, Linux and Mac.

• Document oriented "NOSQL" Database having features
• Pre-requisites

• System Requirement
• Download

• 
  
• User Requirement

• $hostname
• $userdel -r couchbase
• $userdel -r couchbase
• $useradd couchbase
• passwd couchbase
• $id couchbase
• vi /etc/sudoers

cp .bashrc /home/couchbase

sudo su - couchbase

• Got to  http://www.couchbase.com/nosql-databases/downloads
• Select the Package version and your platform (Linux, Windows, Mac).
• It will download an 80 MB rpm package file - 'couchbase-server-enterprise-4.0.0-centos6.x86_64.rpm'
• Copy the rpm file to your Linux machine.
• You can directly download the package using wget -
•  wget  http://packages.couchbase.com/releases/4.0.0/couchbase-server-enterprise-4.0.0-centos6.x86_64.rpm

Documentation for reference :

• Administrators  - https://docs.couchbase.com/server/5.5/install/get-started.html
• Sample code or projects - https://github.com/couchbaselabs/mobile-training-todo/tree/feature/2.0

• 
  
• 
  
• Download
• Single Node Implementation

• Multi Node Implementation

• Using WEB UI
• Using Couchbase-CLI

• Walkthrough of the COUCHBASE WEB UI.
• Important Administration Commands.

VBucket

The overall key space is partitioned into 1024 logical storage unit called "Virtual buckets" ( or vBucket).
vBucket are distributed across machines within the cluster via a map that is shared among servers in the cluster as well as  the client library.
The basic unit of dat storage in Couchbase is

JSON Document   ->  Unique Key  --->Vbucket  ->Bucket  -->  Node --->Cluster