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Presentation held in Tampere on April 22th 2016 by Otto Kekäläinen
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Collaboration in open source - examples from MariaDB
1.
© 2015 MariaDB
Foundation1 * * Collaboration in open source Examples from MariaDB Otto Kekäläinen 22.4.2016 Tampere, Finland
2.
© 2015 MariaDB
Foundation2 * * What competitive advantage do the human species possess that made us able to conqueror the planet?
3.
© 2015 MariaDB
Foundation3 * * Symbols that can transfer complex information across any distance or time with great accuracy
4.
© 2015 MariaDB
Foundation4 * * Symbols extend our memory beyond our brain. Code extends our thinking process beyond our brain.
5.
© 2015 MariaDB
Foundation5 * * Towards the best solution in the world Open source software development is exciting
6.
© 2015 MariaDB
Foundation6 * * Funded by MariaDB.com, Booking.com, Visma, Automattic (WordPress.com), Odin/Parallels, Verkkokauppa.com...
7.
© 2015 MariaDB
Foundation7 * * Ensuring continuity and open collaboration
8.
© 2015 MariaDB
Foundation8 * * Continuity ● The Foundation has the relevant technical assets and tools (website mariadb.org, version control repository, build and release systems). ● The Foundation has copyright via staff work and contributor work (CLA). For the rest (some copyrights, trademark etc) the Foundation has irrevocable licenses to use (e.g. GPL, BSD).
9.
© 2015 MariaDB
Foundation9 * * Foundation staff ● 6 persons, including ”Monty” Widenius ● Makes MariaDB available to as many users as possible (porting, packaging) ● Single contact point for collaboration and contributions – The Foundation makes sure all pull requests and patches are reviewed
10.
© 2015 MariaDB
Foundation10 Open collaboration The Foundation is open, inclusive and enables everybody to contribute and collaborate on equal basis.
11.
© 2015 MariaDB
Foundation11 * * Open source is an opportunity ● Freedom to use ● Freedom to study ● Freedom to improve ● Freedom to redistribute Freedoms, not obligations
12.
© 2015 MariaDB
Foundation12 Open source vs. closed source is like democracy vs. totalitarism Even the best strategy does not guarantee successful execution
13.
© 2015 MariaDB
Foundation13 Collaboration Give and get
14.
© 2015 MariaDB
Foundation14 * * All contributions are valuable ● code ● testing ● translations ● documentation ● graphics, design ● packaging and distribution ● marketing, advocacy ● good bug report, feedback, ideas
15.
© 2015 MariaDB
Foundation15 * * Who are the contributors? ● codership.com ● freesa.org ● galeracluster.com ● gmail.com ● google.com ● hotmail.com ● iki.fi ● mariadb.com ● mariadb.org git log | grep Author See https://mariadb.com/kb/en/mariadb/log-of-mariadb-contributions/ for details ● mongosearch.org ● openquery.com ● oracle.com ● primebase.org ● skysql.com ● suse.com ● tokutek.com ● twitter.com ● xiphis.org ● yahoo.com
16.
© 2015 MariaDB
Foundation16 Reasons to contribute Scratch your own itch!
17.
© 2015 MariaDB
Foundation17 Reasons to contribute
18.
© 2015 MariaDB
Foundation18 Reasons to contribute
19.
© 2015 MariaDB
Foundation19 Reasons to contribute
20.
© 2015 MariaDB
Foundation20 Also for the fun of it!
21.
© 2015 MariaDB
Foundation21 Cost vs benefit in contributions Keep it simple (but not too simple)
22.
© 2015 MariaDB
Foundation22
23.
© 2015 MariaDB
Foundation23 * * Facilitate collaboration, be inclusive ● Publish code in real time, not just at release time ● Discuss and plan on public mailing list ● Chat in the public (e.g. IRC online, meetings offline) ● Public bug tracker, transparent progress and priorities ● Respond quickly to pull requests on Github and to bug reports that have patches attached ● Keep documentation up-to-date, develop documentation alongside code and allow also contributions in documentation
24.
© 2015 MariaDB
Foundation24 How does one manage a big project with millions of lines of code? You don't.
25.
© 2015 MariaDB
Foundation25 Interfaces and APIs ● Divide and conqueror: modularize everything ● Split long files into separate files. – Easier to read and grasp, easier to merge in git. ● Define clear interfaces between components so that anybody using the interface does not have to care what happens “behind the wall”. ● Use semantic version numbers (1.0, 1.0.1, 1.1, 2.0., 2.2...) and other common conventions. ● Contracts and promises that the interfaces will continue to work in the future too.
26.
© 2015 MariaDB
Foundation26 * * Be inclusive
27.
© 2015 MariaDB
Foundation27 * * Be inclusive
28.
© 2015 MariaDB
Foundation28 * * Be inclusive
29.
© 2015 MariaDB
Foundation29 Collaboration problems? Support requests and random ideas vs Real contributions and talent
30.
© 2015 MariaDB
Foundation30 Collaboration problems? Automatic testing to help review contributions and focus human time on best contributions
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© 2015 MariaDB
Foundation31 Collaboration opportunities? ”Given enough eyeballs all bugs are shallow” – Linus law
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Foundation32 * * How to contribute to the MariaDB project?
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© 2015 MariaDB
Foundation33 Read the docs!
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Foundation34 Read the source!
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© 2015 MariaDB
Foundation35 Technical requirements ● Clearly defined problem with an unarguable solution ● No regressions or draw-backs ● The code might have been difficult to write, but it should not be difficult to read ● Running code and test cases makes the best evidence (example mysql-test/suite/encryption/t/create_or_replace.test) ● File issue at jira.mariadb.org – attach patch or – link to git branch
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© 2015 MariaDB
Foundation36 Legal requirements ● Signed MariaDB Contributor Agreement (MCA) sent to foundation@mariadb.org
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© 2015 MariaDB
Foundation37 Quality ● Quality of submission – the benefit must be big enough to spark interest ● Quality of submitter – clear and active communication – resilience – reputation from previous submissions
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Foundation38 Big or small – everything counts
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© 2015 MariaDB
Foundation39 Big or small – everything counts
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© 2015 MariaDB
Foundation40 * * Your contributions are welcome!
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© 2015 MariaDB
Foundation41 Thanks! mariadb.org @ottokekalainen otto@mariadb.org
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