My presentation from the Ruby Hoedown on cloud computing and how Ruby developers can take advantage of cloud services to build scalable web applications.

2. The Future is Now Leveraging the Cloud with Ruby Robert Dempsey Atlantic Dominion Solutions

4. I’m angry

5. Like mad cow angry

6. If I hear this one more time… Rails can’t scale

7. There will be trouble!

8. Ruby on Rails can scale… … if you understand how to scale it.

9. Rails MVC Architecture http://wiki.rubyonrails.org/rails/pages/UnderstandingRailsMVC

10. Rails MVC Overview http://betterexplained.com/articles/intermediate-rails-understanding-models-views-and-controllers/

12. Where the cloud comes in http://betterexplained.com/articles/intermediate-rails-understanding-models-views-and-controllers/

15. Let’s add to that An application and the resources it uses grow as demand increases.

18. High-availability cluster

19. Load balancing cluster

20. Grid

23. Cloud computing, defined http://www.infoworld.com/article/08/04/07/15FE-cloud-computing-reality_1.html “ A way to increase capacity or add capabilities on the fly without investing in new infrastructure, training new personnel, or licensing new software.” - InfoWorld, April 2008

25. Why is this important? "By 2011, early technology adopters will forgo capital expenditures and instead purchase 40 percent of their IT infrastructure as a service. Increased high-speed bandwidth makes it practical to locate infrastructure at other sites and still receive the same response times. Enterprises believe that as service-oriented architecture (SOA) becomes common, 'cloud computing' will take off, thus untying applications from specific infrastructure.” - Gartner Group

32. Morph

49. Standard EC2 Deploy

54. Books

58. S3: Using Paperclip right_aws right_http_connection Gems to use

59. S3: Using Paperclip class Product < ActiveRecord::Base has_attached_file :photo, :styles => { :medium => “300x300”, :thumb => “100x100” }, :storage => :s3, :s3_credentials => “#{RAILS_ROOT}/config/s3.yml”, :path => “:attachment/:id/:style.:extension”, :bucket => ‘introtoruby_development’ end app/models/product.rb

60. SQS sqs Gems to use

61. SQS Require ‘rubygems’ Require ‘sqs’ SQS.access_key_id = ‘YOUR_ACCESS_KEY_ID’ SQS.secret_access_key = ‘YOUR_SECRET_ACCESS_KEY’ config/environment.rb

62. SQS # Get an SQS queue q = SQS.get_queue ”my_sqs_queue_name” # Send a message made up of the job id q.send_message “#{self.id}” # Grab a job from the queue message = queue.receive_message # Delete the job from the queue message.delete app/models/job.rb

63. SQS: right_aws gem # Create a queue sqs = RightAws::SqsGen2.new(aws_access_key_id, aws_secret_access_key) queue1 = sqs.queue('my_awesome_queue') # Create a second queue queue2 = RightAws::SqsGen2::Queue.create(sqs, ‘ my_cool_queue’, true) puts queue2.size Gems used: right_aws, right_http_connection

64. SQS: right_aws gem # Pull a message from the queue and make it invisible message1 = queue2.receive message1.visibility = 0 puts message1 # Clear the queue, add a message, delete first accessible msg queue2.clear(true) queue2.send_message(‘Ola-la!’) message2 = queue2.pop

65. SimpleDB: right_aws gem # Create an instance of the SDB interface sdb = RightAws::SdbInterface.new( :server => ‘sdb.amazonaws.com’ :port => 443 :protocol => ‘https’ :signature_version => '0’ :multi_thread => true|false :logger => Logger Object) Gems used: right_aws, right_http_connection

66. SimpleDB: right_aws gem # Create a new domain sdb.create_domain(‘toys’) # Delete a domain Sdb.delete_domain(‘toys’) # Create and save attributes for Jon and Silvia attributes = {} attributes['Jon'] = %w{ car beer } attributes['Silvia'] = %w{ beetle rolling_pin kids } sdb.put_attributes ‘family’, ‘toys’

67. SimpleDB: right_aws gem # Get attributes sdb.get_attributes(‘family’, ‘toys’) # Get attributes only for cat sdb.get_attributes(‘family’, ‘toys’, ‘cat’) # Query query = ”[‘cat’ = ‘claw’]” sdb.query(‘family’, query) # Query returning 10 items sdb.query(‘family’, query, 10)

70. THANK YOU

71. Questions? ADS http ://www.techcfl.com Blog http://rorblog.techcfl.com Twitter http://www.twitter.com/rdempsey LinkedIn http://www.linkedin.com/in/techcfl