Intro to Open source. Amit Bhayani
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Amit's talk at FOSSkriti 2010
Transcript of Intro to Open source. Amit Bhayani
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/truth_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 aboutF R E E D O M!!!
O P E N S O U R C E S O F T W A R Eis 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
Why Companies use OSS
Depends on individual
Freedom(the principle, freedom to modify)
Cost(Money, time to acquire)
Quality
FreedomCost
Quality
Mobicents -
Telco middle-ware platform
● JAIN SLEE Server
● Sip Servlets Server
● Media Server
● Presence Server
● Diameter
http://www.mobicents.org/
Mobicents JAIN SLEE Server
Mobicents Sip Sevlets Server
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Mobicents Media Server
Mobicents
JAIN SLEE Server
Mobicents Media Server
IP
SIP
RTP
SIP
IVR
Application
Mobile / Land
Phone
Legacy
Protocols
SIP
RTP
MGCP
Conference
Application
MSC
SS7
IP
SIPhone
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Google Summer of Code - 2010
• What is GsoC– Starts from March 2010
• http://groups.google.com/group/google-summer-of-code-discuss/browse_thread/thread/d839c0b02ac15b3f?pli=1
–
• Mobicents also proposing – Automated Speech Recognition (ASR) Project– Text-to-speec (TTS) Project– Media Server Markup Language – MSML–
• Send your queries to [email protected]
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Confidential
Questions?
http://amitbhayani.blogspot.com
