Difference between Pouchdb and CouchDB
1. PouchDB :
It is an open source database, it is an in-browser database API which is written in Javascript. It allows applications to store the data locally, which lets users enjoy all the features of the application though they are not online. Additionally there is synchronization of data between clients which keeps users up to date wherever they go.It is a Javascript implementation of CouchDB. It can be used locally in Node, also in browsers and remotrly through HTTP protocol. It is styled off on CouchDB and it is a NoSQL database.
To store the data it innately uses WebSQL and IndexedDB.
By default this database uses IndexedDB adapter for the browser, LevelDB adapter in the Node.js and CouchDB adapter for the remote databases.
We can run it in Node.js and also use it as a direct interface for the CouchDB compatible server. This API is consistent with its working in all environments so we can spend tme in writing clean code and not thinking about browser varieties.
How does PouchDB work?
When we are using an application offline then the data is saved locally by the ise of WebSQL and IndexedDB in the browser and wehen the application is online , pouchdb synchnizes it with CouchDb and the compatible servers. By using PouchDB we can connect with remote as well as local databases easily without perceiving the variations.
2. CouchDB :
This database is an open source NoSQL database. Its focus is on how seamlessly we can use it. It is developed by Apache software. It is the modern type of database.it is a multi-master application which was released in 2005 and became Apache project in the year 2008. This database uses HTTP protocol for the API. It converts documents and JSON to store the data, query language used is javascript.
| Sr. no | PouchDB | CouchDB |
| 1. | Apache Software Foundation has developed PouchDB | Apache Software Foundation has developed CouchDB |
| 2 | It was initialy released in 2012 | It was initialy released in 2005 |
| 3 | The operating systems for pouchDB servers are serverless, and it requires a Javascript environment. | The operating systems for CouchDB are Android, OS X, windows, BSD and Solaris |
| 4 | It is implemented in Javascript language | It is implemented in Erlang language |
| 5 | This database uses HTTP REST Javascript API | This database uses RESTful HTTP or JSON API |
| 6 | It supports programming language - JavaScript | It supports programming languages like C, Erlang, Java, C#, PHP, PL/SQL, Ruby, Python, Haskell, Lisp, Lua, Objective-C, OCaml, Perl, Smalltalk. |
| 7 | The data scheme is Schema Free | The data scheme is Schema Free |
| 8 | It does not allow access rights to users they can be defined as per database | It allows access right to the users and they are defined as per database |
| 9 | There is no XML support | There is no XML support |
| 10 | It supports Secondary Indexes | It supports Secondary Indexes |
| 11 | It does not support SQL | It does not support SQL |
| 12 | It supports triggers | It supports triggers |
| 13 | Partition method is Sharding | Partition method is Sharding |
| 14 | Replication methods include multiple source replication and source replica replication | Replication methods include multiple source replication and source replica replication |
| 15 | It supports MapReduce | It supports MapReduce |
| 16 | The consistency concept is Eventual Consistency | The consistency concept is Eventual Consistency |
| 17 | For Server side scripts view funxtion in Javascript are used | For Server side scripts view funxtion in Javascript are used |
| 18 | It does not support foreign keys | It does not support foreign keys |
| 19 | It does not support transaction concepts | It does not support transaction concepts |
| 20 | There is no support for in memory capabilities | It supports in memory capabilities |
| 21 | It provides Durability | It provides Durability |
| 22 | Primary database model is Document Store | Primary database model is Document Store |