Just Die Already

I'm not religious, but I'm definitely spiritual. Programs, like living creatures, need to die.

Program that run forever are zombies. They're cancers. They're unnatural.

Programs that are born and die are living. They're healthy. They're natural.

Let's look at some common cancers and some healthy software.

Transcript

1. Just Die Already
2. State
3. App Servers
4. • Runtime • Application • Socket • Database • Cache • Worker threads “Stateless”
5. Software Ageing gradual degradation of application performance, over time, that may lead to premature program termination
6. What sucks?
7. Rails.
9. Old news?
10. “400  restarts  a   mother  fucking   day”
11. Leeks
12. •Memory •Locks •File descriptors •Sockets •Threads
13. Recovery
15. @hourly  pgrep  Rails  |  head  -­‐1  |  xargs  kill
16. Passenger
17. That. Is Crazy.
18. Databases
19. The Ultimate Single Point of Failure
20. What sucks?
21. SQL.
23. Recovery
26. Event Sourcing Martin Fowler’s
28. Soft Deletes
29. acts_as_audited
31. Tests
32. Software Testing Doesn’t Scale
33. The Argument • Feature testing is effective. • Fast changing systems are unstable. • Complexity is inevitable. • Inter-feature testing is ineffective.
34. What sucks?
35. “Identical to production”
36. #OccupyProduction
37. Recovery
39. Acceptance Integration Unit Run in Production Run in Production Yeah, nah.
40. Multi-Version Concurrency
41. “But what if I break production?”
42. “But when I break production?”
44. •Crash •Undo •Instrument
45. Recovery-Oriented Computing http://roc.cs.berkeley.edu/
46. fin