node.jsとは

1. node.js
node.js

2. •
•
• Ruby on Rails node.js
•nko2
•
•github ogom
•Twitter @ogom_

3. • node.js
•node.js
• JavaScript
• node.js
hello node world!

4. Agenda
•node.js
•node.js
•

5. node.js

6. node.js
•Eventide I/O for V8 JavaScript.
•node.js
Evented I/O V8 JavaScript
•Evented I/O
• (I/O)
•V8 JavaScript
•V8 Google Chrome JavaScript
Engine JavaScript

7. node.js
•
• I/O
(node.js )
•
•1
• I/O JavaScript
• JavaScript
• JavaScript

8. •
•
•
•
•
•
•
•
•

9. I/O
•
•
• A
• A
A
• B A
• B B
B
•
•
• I/O
• (I/O)

10. node.js

11. • C10K
•C client 10K 10000
•
•
• Apache nginx
• Apache
• 1
•
• nginx
• 1
• (CPU )
• (I/O )

12. •
1. → network read
2. → disk read
3. → network write
• read/write
• read/write
•node.js read/write
•

14. JavaScript
•JavaScript
• JSON
• Web XML JSON
• HTML5
• (Web Socket) (Web Workers)
• HTML5 JavaScript
•
• CouchDB, MongoDB
• JavaScript
• JavaScript
•
• JavaScript

15. node.js
•node.js
•JavaScript
•socket.io
•npm registry
•node.js PaaS SaaS
✤node.js
enjoy node!