Intro to Open source. Amit Bhayani

Name of Presentation
TECHKRITI,
Red Hat
IIT, K
Presenter
Feb 2009

Amit Bhayani <amit.bhayani@gmail.com>

O P E N S O U R C E == F R E E D O M!!!

TRUTH HAPPENS!

http://www.redhat.com/magazine/008jun05/features/trut
h_happens/

What the heck is software?
Source

Binary

Closed Source – Am I behind the bars?
 You can't
● See the Source
● Can't fix bug
 Can I pass the software to my
girlfriend?
● What?? NO!
 Well I have found the bug in this
(Licensed) Software, what next?
● Well done my friend. Call Customer
Care, tell them. Wait for new version
Zzzzzzzzz

But we spoke about
F R E E D O M!!!

OPEN SOURCE SOFTWARE
is the solution.

Open Source – Advantages
 You can
● See the Source
● Can fix bug
● Add features
 Can I pass the software to my girlfriend?
● Yes! Pass it to all you love.
 Well I have found the bug in this (Open Source) Software, what
next?
● Well done my friend. Fix it your self taking help from community and be proud!
● Raise it in bug list and let some one fix it
● The commercial model - Support

Open Source – Advantages
 There is big community around it. You are part of
it.
● Very likely that feature you want is already present in OSS
● If not very likely there is other company/organization seeking
same feature, distribute the task and keep cost low.
 Millions downloading the OSS.
● Very difficult to miss any bugs by 2 * millions eye (Assuming
all who downloads have a pair of eye )
● JBoss Application Server downloads have crossed 1 million
mark few months ago
 Most of the OSS have Roadmap for next
foreseeable future made public
● Community drives the RoadMap. YOU DRIVE IT!
 Docs also nicely covered.

But I ain't developer ...
My aspiration is to go for MBA
 OSS greatly reduces the cost while maintaining the quality.
● You would be responsible to keep the cost low.
 Cutting Edge Technology
● Wouldn't you want to have latest?

I have brilliant Idea ... should I make it
OSS
 Just check if it already exist?
● There are OSS Hosting Sites like
● SourceForge http://sourceforge.net/
− This alone has 100K + projects hosted
● Google Code http://code.google.com/
● java.net http://java.net/
● They provide
● SVN / CVS Server's
● Forums / Public Groups
● Wiki Page
 If its really new – GO AHEAD!

I have no ideas
 Am I useless?
● Be the part of existing OSS
● No one starts OSS without ever
using/contributing to other OSS

 What is your interest?
● Statistics shows OSS has wide acceptability by following ranking

I. Operating System – Linux is De Facto
II.Data Base – MySQL, Postgress
III.Middle-ware – JBoss
IV.Telco Middle-ware – Mobicents
V.Others

The License Model
 Developer owns the code unless he/she grants you a license.
 Copyright!
 Over 50 approved Licenses http://www.opensource.org/licenses
 Why So many Licenses?
 Basically divided it two BSD and GPL

The License Model - BSD
 Berkeley Software Distribution license
 Use it the way you want, but we are not responsible if it blows
up your “Space Rocket” or Your “Hello World Program”
● Use in your product which is non-open source
● Make changes to existing code, add new features and never ever talk to anyon
about this. Shhhhh
 Very flexible

The License Model - GPL
 License Rights Granted under the GPL
● Licensee may run the Program
● Licensee may copy and distribute verbatim copies of the Program’s source code
● Licensee may create “derivative works” of the Program
● Licensee may distribute such derivative works
 If a licensee of a Program distributes that Program, or any “work
based on the Program,” such licensee must:
● also distribute the source code for the Program and for the work based on the
Program, and
● cause such works to be licensed at no charge under the terms of the GPL

Permutations and Combinations
 Your piece of code will depend on many libraries
● BSD can't have GPL Code
● GPL can have BSD

 Scared about all these License Jargons?
● Don't be! This is till simpler than Licensed Software
● Frankly how many of you ever read the complete
license before clicking that “I Accept” button while
installing License Based Software?

But all these License's have common
points
 Source Code available
 Distribute the code
 Making changes allowed
 Use without royalty

The OSS Business Model
 Companies back OSS by providing indemnity
 Provide
● Support
● Consulting
● Training
 They fuel OSS and also have in-house core developers
 See RedHat
 See JBoss

C
F
Q
o
r Why Companies use OSS
u
s
e
a
t
e  Depends on individual
l
(
d
i
M
o
t
o
m
y
n
(
e
t Cost
Freedom
y
h
,
e

p
r
i
n
c Quality
i
p
l
e

Mobicents -
 Telco middle-ware platform
● JAIN SLEE Server
● Sip Servlets Server
● Media Server
● Presence Server
● Diameter

 http://www.mobicents.org/

2

Mobicents Media Server
SIP

RTP
IVR Conference
SIP Application Application

SIPhone SIP Mobicents
JAIN SLEE Server

MGCP
IP
IP

Mobicents Media
RTP
Server
Mobile / Land
Phone SS7
Legacy
Protocols

MSC

3

Google Summer of Code - 2010

• What is GsoC
– Starts from March 2010
• http://groups.google.com/group/google-summer-of-code-discuss/
–
• Mobicents also proposing
– Automated Speech Recognition (ASR) Project
– Text-to-speec (TTS) Project
– Media Server Markup Language – MSML
–
• Send your queries to mobicents-public@googlegroups.com

Confidential

Questions?

http://amitbhayani.blogspot.com

24

Intro to Open source. Amit Bhayani

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