Version Control System

By Anil Gupta

(www.guptaanil.com)‏

Objective

Understand the current development strategy.

Why version control system is needed?

What is version control system?

Types of version control system.

Current development strategies...

Single User development

Multi User development

Development in individual copy

Development in common copy

Single User development #include<stdio.h> Int main()‏ { int a; int b; } File.c #include<stdio.h> Int main()‏ { int a; } File.c Yesterday Today

Single User development (Problems)‏

No easy way to get the previous version of the current file by date-time.

No easy way to view the difference between old versions of a file and current file.

Multi User development (Development in individual copy) User-1 User-2 User-3 Comp-1 Comp-2 Comp-3 server

Multi User development (Development in individual copy) Problems

No easy way to merge the modified files of different user’s in project.

No easy way to retrieve previous versions of the files by date or by user.

Multi User development (Development in common copy) User-1 User-2 User-3 server

Multi User development (Development in common copy) Problems

Server load and network traffic.

Weak performance.

No easy way to retrieve previous versions of the files by date or by user.

Can’t view the difference between previous file and current file.

Problem Summery

No space to retrieve previous version of files by date or by user.

No space to view the difference between previous file and current file.

Doubtful, manual and time consuming file merging process.

Slow development performance.

May I help you? (Dr. Version Control System )‏

Single User development #include<stdio.h> Int main()‏ { int a; int b; } File.c #include<stdio.h> Int main()‏ { int a; } File.c Yesterday Today - Morning Version-1 Version-2 Version-3 #include<stdio.h> Int main()‏ { int a; int b; } File.c Today - Evening

Multi User development (Development in individual copy) User-1 User-2 User-3 W orking copy - 1 of Repository Server (Main Repository)‏ W orking copy - 2 of Repository W orking copy - 3 of Repository Commit to repository First Time checkout from server repository Update from repository

File management in Repository Version-1 Version-2 Version-3 Version-4 User : user-1 Date : 24-10- 2007 Time :11:00:12 User : user-2 Date : 24-10- 2007 Time :11:00:12 User : user-1 Date : 24-10- 2007 Time :11:00:12 User : user-3 Date : 24-10- 2007 Time :1200:12 User : user-2 Date : 24-10- 2007 Time :12:00:12 User : user-1 Date : 24-10- 2007 Time :11:00:12 User : user-2 Date : 24-10- 2007 Time :11:00:12 User : user-3 Date : 24-10- 2007 Time :11:00:12 User : user-1 Date : 24-10- 2007 Time :11:00:12 User : user-1 Date : 24-10- 2007 Time :11:00:12 User : user-2 Date : 24-10- 2007 Time :11:00:12 User : user-3 Date : 24-10- 2007 Time :11:00:12

Thank You..!!!