What's inside ResearchGate

Transcript

1. What's behind it? @BastianHofmann
3. ResearchGate gives science back to the people who make it happen. We help researchers build reputation and accelerate scientific progress. On their terms. ‟
7. So let's talk about architecture
9. Normally these talks are about...
10. webserver loadbalancer pgsql memcached mongodb services Active MQ
11. Big Data
12. Terrabytes of data
13. Thousands of events per second
14. Not this one
15. Instead...
16. Logging
17. Measuring
18. Testing
19. Logging
20. Exceptions & Errors
21. Access Logs
22. Debug logs
23. Logging from cronjobs and event workers
24. $ tail -f error.log $ grep
26. Aggregate the logs in a central place
27. Make them easily full- text searchable
28. Correlate them
29. Structured Messages
30. { "version": "1.0", "host": "www1", "short_message": "Short message", "full_message": "Backtrace here\n \nmore stuff", "timestamp": 1291899928.412, "level": 1, "facility": "payment-backend", "file": "/var/www/somefile.rb", "line": 356, "_user_id": 42, "_something_else": "foo" }
31. Find out if something goes wrong and why it went wrong quickly!
32. graylog2 http://graylog2.org/
34. 18,000 messages/min
35. Measuring
36. Technical metrics
37. Business metrics
38. KPI
39. How do your users interact with the site?
41. https://metrics.librato.com/
42. Metric driven development
43. Continuous integration
44. Fast deployment
45. Continuous deployment
46. Metrics as a way of testing
47. Of course testing your code is still necessary
48. Testing
49. e.g. A/B Testing
50. Disadvantages
51. Bad conversion during test
52. Only works for temporary tests
53. Inflexible: changing of tests not supported
54. There are better methods with better results
55. Bandit Algorithm http://monospaced.posterous.com/stop-ab-testing-and- make-out-like-a-bandit
56. BUY IT BUY IT random decision $userId = 24 save that option A was clicked save that option A is shown conversion = option A clicked / option A shown 1
57. BUY IT BUY IT 2 90% users best option rest other options
58. Carefully define your goals!
60. Integrate it into your architecture
62. Self contained
63. Can be addressed and rendered separately
64. JS is part of the component
65. PHP Controller Mustache Template JavaScript view class Widget Providing data Handling browser events Displaying data
67. Last but not least
70. h"p://twi"er.com/Bas2anHofmann h"p://profiles.google.com/bashofmann h"p://lanyrd.com/people/Bas2anHofmann h"p://speakerdeck.com/u/bas2anhofmann h"ps://github.com/bashofmann mail@bas2anhofmann.de