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design for cloud mathias meyer, jax 2012
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Me — infrastructure — code — databases @roidrage www.paperplanes.de
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the cloud
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10,000 feet
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amazon web services
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ec2
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on-demand computing
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api
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pay as you go
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multiple regions
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multiple datacenters
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high cpu vs. high memory
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elastic block store
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more aws products s3 cloudfront cloudformation cloudwatch rds auto scaling simpledb route 53 load balancing queue service notification service elastic mapreduce
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what’s scalarium?
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automates: setup configuration one-click deploy
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...for ec2 ...on ec2
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the dream: configure a cluster push a button boom!
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configuration + cookbooks/manifests + chef/puppet = configured cluster
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configuration: chef server rightscale json scalarium
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in the beginning...
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Scalarium
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ec2 is not a traditional datacenter
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multi-tenant
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high chance of failure
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faulty instances
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datacenter outage
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network partition
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more instances = higher chance of failure
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mtbf
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21/04/2011
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7/8/2011
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don’t fear failure
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plan for failure
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test failure
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plan for recovery
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mttr
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disaster recovery plan
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multi-datacenter deployments
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replication
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multi-region deployments
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$$$
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relax consistency requirements
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latency
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keep data local
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keep data in memory
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cache is king
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use raids for ebs
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use local storage
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use bigger instances
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scalarium is ~monolithic
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cloud ≠ monolithic
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cloud ☠ centralized
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small, independent services
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self-contained
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independently deployable
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well defined apis
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http/json thrift protocol buffers
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sinatra dropwizard spark scalatra
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fail fast
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retry
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internal queues
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design for resilience
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“think about your software running.” theo schlossnagle, omniti
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understand your code’s breaking points
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isn’t all that what you do at large scale?
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cloud == large scale
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scalarium today
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scalarium runs on scalarium
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lack of visibility
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don’t fall for service level agreements
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amazon only handles infrastructure
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how you build on it is up to you
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fun fact
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amazon.com is served off ec2
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thank you!