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Version Control System
GIT
Environments for App
Dev QA IAT PROD
Code Deployment….
Dev QA IAT PROD
V1 V1 V1 V1
V2 V2 V2 V2
Issues…..with V2
Rollback ????
Without VCS
 Once Saved, All the changes are permanent and can’t revert.
 No Info on who updated what
 Release Failure
 Downtime of Application
With VCS
What is VCS…. ?
Version control systems are a category of software tools
that help a software team manage changes to source
code over time.
Version control software keeps track of every
modification to the code in a special kind of database. If
a mistake is made, developers can turn back the clock
and compare earlier versions of the code to help fix the
mistake while minimizing disruption to all team
members.
Local….
 The practice of having the CODE saved
in the local PC
 Local DB keeps a record of the changes.
 SCCS & RCS
Problem ??
Centralized VCS
 In CVC, A Central Repo is maintained where all the versioned files are kept.
 Developers can checkout and check-in changes from their own computers.
Problem ??
Distributed VCS
 Version database (CODE) is stored on every Developer’s
local system and remote server
 Changes are made is Local and then PUSH to server
 Highly Available
History
First Generation
 Single-file
 No networking
 e.g. SCCS, RCS
Second Generation
 Multi-file
 Centralized
 e.g. CVS, VSS, SVN, TFS, Perforce
Third Generation
 Changesets
 Distributed
 e.g. Git, Hg, Bazaar, BitKeeper
GIT
Let us Install !!
git –-version  See if it is already Installed
apt-get update (ubuntu) or yum update (rhel , centos)
apt-get install git or yum install git

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Version-Control-System.pptx

  • 3. Code Deployment…. Dev QA IAT PROD V1 V1 V1 V1 V2 V2 V2 V2
  • 6. Without VCS  Once Saved, All the changes are permanent and can’t revert.  No Info on who updated what  Release Failure  Downtime of Application
  • 8. What is VCS…. ? Version control systems are a category of software tools that help a software team manage changes to source code over time. Version control software keeps track of every modification to the code in a special kind of database. If a mistake is made, developers can turn back the clock and compare earlier versions of the code to help fix the mistake while minimizing disruption to all team members.
  • 9. Local….  The practice of having the CODE saved in the local PC  Local DB keeps a record of the changes.  SCCS & RCS
  • 11. Centralized VCS  In CVC, A Central Repo is maintained where all the versioned files are kept.  Developers can checkout and check-in changes from their own computers.
  • 13. Distributed VCS  Version database (CODE) is stored on every Developer’s local system and remote server  Changes are made is Local and then PUSH to server  Highly Available
  • 14. History First Generation  Single-file  No networking  e.g. SCCS, RCS Second Generation  Multi-file  Centralized  e.g. CVS, VSS, SVN, TFS, Perforce Third Generation  Changesets  Distributed  e.g. Git, Hg, Bazaar, BitKeeper
  • 15. GIT
  • 16. Let us Install !! git –-version  See if it is already Installed apt-get update (ubuntu) or yum update (rhel , centos) apt-get install git or yum install git