A Gentle Overview To Maglev

Transcript

1. A Gentle Overview To Maglev 1 Thursday, August 9, 12
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4. Get to know me! - software developer (Ruby, Rails, C, etc) - http://highgroove.com - jonathan.wallace@gmail.com - @jonathanwallace - WE’RE HIRING!! 4 Thursday, August 9, 12 background, schooling, etc
5. Way back in 2008... http://canrailsscale.com/ 5 Thursday, August 9, 12
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9. What is Maglev? maglev is a ruby implementation running on a smalltalk VM 9 Thursday, August 9, 12
10. What is a Smalltalk VM? “smalltalk” and “VM” 10 Thursday, August 9, 12 let’s unpack that question. two terms. “smalltalk” and “VM”
11. What is Smalltalk? an object oriented programming language that inspired RUBY! 11 Thursday, August 9, 12
12. What is a VM? “Virtual Machine” 12 Thursday, August 9, 12
13. Are these VMs? 13 Thursday, August 9, 12
14. Are these VMs? 14 Thursday, August 9, 12
15. Wait, I didn’t see Maglev there! 15 Thursday, August 9, 12
16. “You are correct, sir!” 16 Thursday, August 9, 12 Correct, there are two types of VMs these days “VM” term has been overloaded System Virtual machines
17. What we’re talking about is Process Virtual Machines. 17 Thursday, August 9, 12 “write once, run anywhere”
18. 18 Thursday, August 9, 12
19. 19 Thursday, August 9, 12 uses Common Language Runtime
20. What is a Ruby implementation? let’s talk through it 20 Thursday, August 9, 12
21. You may have heard of.. MRI (1.8), YARV (1.9), JRuby, Maglev, Rubinius 21 Thursday, August 9, 12
22. What’s so cool about each of them? 22 Thursday, August 9, 12
23. JRUBY - use of the java ecosystem, native threading model 23 Thursday, August 9, 12
24. MRI, YARV - most common, C-based implementation 24 Thursday, August 9, 12
25. Rubinius - ruby in ruby, meta-cool 25 Thursday, August 9, 12 with some C++ in there
26. What is Maglev? maglev is a ruby implementation running on a smalltalk VM 26 Thursday, August 9, 12 everybody got it? good!
27. But wait! There’s more.. 27 Thursday, August 9, 12 what is the VM? can we get some details? the VM is called Gemstone
28. What is GemStone? 28 Thursday, August 9, 12
29. 29 Thursday, August 9, 12 distributed shared cache, fully ACID transactions, enterprise NoSQL data management capabilities, multiuser, multimachine, garbage collection
30. How does GemStone work? there are a few pieces to the puzzle 30 Thursday, August 9, 12
31. 31 Thursday, August 9, 12 here we have the running ruby process. this would be your irb session what’s up with that arrow? what fills up the object space?
32. 32 Thursday, August 9, 12 on the right, that’s the repository. the default ruby repository is just a large file on disk. it contains all of the (persistent) objects, classes and methods know to the system at VM startup
33. 33 Thursday, August 9, 12 but something lives in the middle. This is the called the Stone process
34. 34 Thursday, August 9, 12 what are those called?
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36. “Is That All There Is?” 36 Thursday, August 9, 12
37. Is that all there is? PJ harvey photo? 37 Thursday, August 9, 12 no, of course not. there’s tons of hidden knobs to twiddle, transaction log files, shared page cache, garbage collection, gem notification and communication
38. EXAMPLES 38 Thursday, August 9, 12
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48. When would I use Maglev? 48 Thursday, August 9, 12 the question you’ve all been asking yourself
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50. - SSL partially implemented - simple rails apps “run” - nokogiri supported? 50 Thursday, August 9, 12
51. QUESTIONS? 51 Thursday, August 9, 12
52. References - http://maglev.github.com/ - http://maglevity.wordpress.com/2009/12/03/vms- repository-maglev/ - http://community.gemstone.com/download/ attachments/6816350/GS64-ProgGuide-3.0.pdf? version=1 52 Thursday, August 9, 12