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Name: When Everything Falls Apart: Stories of Version Control System Scaling
--client lca --show lca_2015 --room OGGB_260098 9453 --force
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Author(s):	Ben Kero
Location	OGGB 260-098
Date	jan Fri 16	Days Raw Files
Start	13:20	First Raw Start	12:24
Duration	0:45:00	Offset	0:55:33
End	14:05	Last Raw End	14:23
Chapters	00:00
Total cuts_time	33 min.

http://lca2015.linux.org.au/schedule/30262/view_talk
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Description:	At Mozilla we have a great dependency on version control systems and software. All contributors format patches against it, all of our build automation infrastructure pulls from it, all online collaboration links against it. Over the life of various Mozilla projects, we've shifted version control systems many times, which led us to being large users of a multitude of systems: Git, Mercurial, CVS, SVN, BZR, and even RCS. Over the years we've also developed bizarre sets of hooks and various externally-hosted barnacles that promise to add greater insight into incoming code, along with notifications and beautiful graphs to keep all the developers up-to-date with the status of the project and to keep the PHBs (pointy-haired bosses) happy with the progress of overall development. In keeping up with this massive demand of hundreds of thousands of checkouts/clones per day, we've had to do heavy capacity planning in terms of hardware (the easy part). The hard part has been trying to scale the backend version control server software, which has led us into some interesting problems that haven't been discussed or shared at length of in detail in a public setting. In particular this talk will be about about experiences and trials that we've faced keeping reliabile, quick response times, and general uptime of the Git and Mercurial version control systems. Join me as we explore when, how, and how often these systems break, how to properly monitor and diagnose them, critical caching failures, backend-switching shenanigans, grumpy upstream correspondence, NFS atomicity being sketchy, and lots of throwing hands into the air and ragequitting. markdown
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2015-01-16/13_20_52.dv Apply: 13:20:52 - 13:54:33 ( 00:33:41 ) S: 13:20:52 - E: 13:54:33 D: 00:33:41 show more...

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