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Arrogant Bastards Guide to Cloud Architecture
- 2. Primary
- 4. Raffle at 4:15 Your raffle ticket is on your badge. The raffle will be held in theaters #5 and #8
- 7. THANK YOU! RANDALL [AT] ENGINEYARD.COM @DAKSIS HTTP://EVILMARTINI.TUMBLR.COM/
- 8. THE ARROGANT BASTARD’S GUIDE TO CLOUDS
- 12. APPLICATION DESIGN PERSISTENCE
- 13. APPLICATION DESIGN PERSISTENCE ECONOMICS
- 14. APPLICATION DESIGN PERSISTENCE ECONOMICS SECURITY
- 15. AND THAT’S JUST THE BEGINNING...
- 20. PERSISTENCE & MEMORY http://upload.wikimedia.org/wikipedia/commons/d/dc/Salvador_Dali_-_Persistence_Of_Memory_-_Surrealism.jpg/
- 21. RECOVERY ORIENTED COMPUTING HTTP://ROC.CS.BERKELEY.EDU/
- 23. TIME IS _______
- 24. TIME VALUE OF ____
- 27. IN THE CLOUD AUTOMATION IS EVERYTHING
- 28. AND NOW FOR SOMETHING COMPLETELY DIFFERENT...
- 29. A FARMER IN THE DELL http://www.dell.com/us/en/business/virtualization_servers/fs.aspx? refid=virtualization_servers&s=bsd&cs=04
- 30. A FARMER IN THE DELL http://www.dell.com/us/en/business/virtualization_servers/fs.aspx? refid=virtualization_servers&s=bsd&cs=04
- 31. * (*Shameless promotion for Engine Yard in on the next slide) (**More shameless than this slide even)
- 32. A SILVER LINING IN THE CLOUDS http://www.engineyard.com/products/cloud/pricing/full-pricing
- 33. 30 DAYS X 24 HOURS @ $2.55 PER HOUR $1836 PER MONTH
- 34. BY THE WAY THAT'S 26ECUS, 1.6TB STORAGE, 70GB OF RAM
- 36. @DAKSIS FIRST AXIOM OF SCALE: IF YOU CAN’T MEASURE IT YOU CAN’T SCALE IT
- 38. WHAT TO SCALE?
- 39. WHAT NOT TO SCALE?
- 40. PREMATURE SCALING IS THE ROOT OF A LOT OF EVIL...
- 42. IN THE CLOUD AUTOMATION IS EVERYTHING (THIS INCLUDES SECURITY)
- 43. IN THE CLOUD ENCRYPT EVERYTHING
- 44. THE OLD GNU THING http://upload.wikimedia.org/wikipedia/en/4/4e/Paintedpuffy1000X907px.png
- 45. RABID OPINIONS (YOUR MILAGE MAY VARY)
- 46. DEPLOY EARLY DEPLOY OFTEN (UNDEPLOYED CODE DOESN’T EXIST)
- 47. AUTOMATE & ISOLATE: REDUCE THE COST OF CHANGE (AUTOMATION SUPPORTS ISOLATION)
- 48. HELP ME OPEN-WAN YOU’RE MY ONLY HOPE (YOU WON’T RUN OUT OF SERVERS)
- 49. RESIST THE URGE http://commons.wikimedia.org/wiki/File:Joint.jpg
- 50. NO SQL IS NOT A SUBSITITUTE FOR NO KNOWLEDGE (THIS INCLUDES YOU)
- 51. Thank You! randall [at] engineyard.com @daksis http://evilmartini.tumblr.com/
Hinweis der Redaktion
- Radically Simple Rails Support
- Otherwise known as what I wish I had known when I started this whole “cloud” thing...
- - This is everyone who’s currently building cloud infrastructure
- * Clouds are different - We all know this, but we continually build applications like it's not the case? We should be smarter than this, but we're not.
- ** How are they different? *** Application design changes - lateral scalability is a key point
- *** Persistence - Persistence doesn't mean the same thing that you think it does. This is a *big* deal for developers. Think about how much time you spend on persistence? ActiveRecord, Mongo, MySQL, File Systems, even abstractions like Mongo - Resources are constrained differently. Usually memory and CPU are broadly available, but constrained. Disk IO can become an issues.
- *** Economics - Cheap means something completely different when you can get a server at $0.11 an hour (we have a whole section on this)
- *** Security - Often over looked, but consider what your attack surface looks like on 10 servers... how about 100 - 1000? - Are you *sure* that virtual disk volume disappeared? Where does the bit bucket on a cloud go?
- This list could go on and on. - Ask the audience, solicit feedback
- Architecture gets a bum rap for two reasons 1) it’s associated with art not science, compare it to a civil engineer 2) Everyone has met an “enterprise architect” Image: http://commons.wikimedia.org/wiki/File:Arc.boutant.cathedrale.Chartres.png
- ** Cloud's are inherently parallel - Most programmers are familiar with iterative/sequential style development - This means that many of the ways that you’re used to doing things either don’t work in a cloud, or they work poorly. - Map Reduce as a common example A small detour into algorithmic complexity
- ** Cloud's _should_ be asynchronous where possible - People overlook this all the time. They assume that a - Latency can be an actual issue in a cloud Message Queues, AMQP, Erlang, Actor Models, Pub/Sub
- ** Cloud's _should_ be asynchronous where possible - People overlook this all the time. They assume that resources in the cloud are always there. - Clouds are powered by fail in a way that normal programmers can’t dream of - Recovery oriented Computing Project at Berkeley
- ** Persistence in the Cloud is Hard... - Forget the old way of doing storage. Fire and forget doesn't work at cloud scale - IO and latency are real issues - Data positioning, where does this data live? Is now a bigger question
- * Economics on clouds are different
- *** Economics - Cheap means something completely different when you can get a server at $0.11 an hour (we have a whole section on this)
- *** Economics - Cheap means something completely different when you can get a server at $0.11 an hour (we have a whole section on this)
- *** Economics - Cheap means something completely different when you can get a server at $0.11 an hour (we have a whole section on this)
- - Effort is the most limited technical resource. I can’t raise effort. VC’s can’t (and won’t) raise you a round of effort *** Economics - Cheap means something completely different when you can get a server at $0.11 an hour (we have a whole section on this) ** You scale the wrong things - Most teams spend time scaling the wrong things *** Time Is ____ / Time Value of _____ / Mo ____ mo' Problems - First and foremost: save you developers *effort*. Consider that a lot of what we do, is about saving developers *effort* *** Developers are LAZY - - Show me a sysadmin who likes doing things manually, and I'll show you an exchange server within arms reach
- ** Automation is Everything - Script it the first time, not the second. If it's not worth scripting, it's not really worth doing - There are no cloud economies of scale without automation! - You are not going to manually configure 20 machines one at a time *** Don't overlook the tools that help - Chef, Puppet, ZSH, bash, EC2 AMI repository, Git
- ** Quick look at the hard Dollar costs of on demand hardware... - Economics for non Geeks - This is how you justify on demand infrastructure to people with MBAs and those who have never undergone the agony of LILO, GRUB, or NTFS vs. FAT32
- * Economics on clouds are different Link: http://www.dell.com/us/en/business/virtualization_servers/fs.aspx?refid=virtualization_servers&s=bsd&cs=04
- * Economics on clouds are different ** Dell Example - Home Page for Dell vitalization applications list prices between $7k and $13k; 12GB of RAM - - Reference: http://www.dell.com/us/en/business/virtualization_servers/fs.aspx?refid=virtualization_servers&s=bsd&cs=04
- * Economics on clouds are different ** Dell Example - Home Page for Dell vitalization applications list prices between $7k and $13k; 12GB of RAM - - Reference: http://www.dell.com/us/en/business/virtualization_servers/fs.aspx?refid=virtualization_servers&s=bsd&cs=04
- ** Automation is Everything - Script it the first time, not the second. If it's not worth scripting, it's not really worth doing - There are no cloud economies of scale without automation! *** Don't overlook the tools that help - Chef, Puppet, ZSH, bash, EC2 AMI repository, Git
- * Cloud's require changing how you think of scale - Scaling is inherently about trading one type of problem for another. - E.g.: Shard the DB or not, use a KV store or not
- * If you can't measure it, you can't scale it - Emacs, Vi(m), TextMate - the age old debates continue - Mongo is faster than, Redis; MySQL ** First Measure factors _outside_ your codebase - People forget that there are costs and scaling issues that start outside the application? How many developers do you have? What's your feature backlog. ** Next: Measure what's in your app - New Relic, Nagios, Splunk, Log Files, CollectD ** Get Help - There are tools to help you measure: New Relic being one of the
- ** Without Metrics You scale the wrong things *** What should you scale? - Good question - Scale available time - Scale developer happiness - Scale client agility - Flexibility *** Scaling is bi-directional - Scaling means going UP AND DOWN! Not just up. - Consider seasonal traffic patterns. - Scaling
- *** What should you scale? - Good question - Scale available time - Scale developer happiness - Scale client agility - Flexibility
- *** Don’t scale the following - Computing time is cheap, don’t save it - Performance tweaks that don’t scale across the network - Infrastructure is cheap, don’t save it
- ** Corollary: Premature scaling is the root of a lot of evil - Not just talking infrastructure, consider adding too many people to a team before the team is ready - Adding too many features before the software is tested - Forrest for the trees
- *** Security - Often over looked, but consider what your attack surface looks like on 10 servers... how about 100 - 1000? - Are you *sure* that virtual disk volume disappeared? Where does the bit bucket on a cloud go? - Security *MUST* be automated and Automatic - Assume that everyone can see everything and everything will be fine...
- - Security *MUST* be automated and Automatic - You are not going to check the logs from 3 servers let alone 300 Tools like - Splunk and Nagios are invaluable. Snort (http://www.snort.org/) - How do you find out what happened on one server out of 30 when that server might go away at any time and destroy the forensics for you?
- - Sometime, somewhere, someone will do something “data stupid” - This includes “forgetting” to sanitize the test data, or posting something they shouldn’t
- *** Security - Encrypt your data at rest
- * Your opinions are nice, but.... here are my ** Rails is opinionated, but infrastructure is unforgiving
- - Stage one mistake: You don’t treat deployment as an extension of your development environment - Second Axiom of Clouds: Undeployed Code is not Code
- - Stage one mistake: You don’t treat deployment as an extension of your development environment - Second Axiom of Clouds: Undeployed Code is not Code
- - Open Technologies help you avoid lock-in
- ** Don't Roll your own - Honestly, just because you can, doesn't mean you should
- - A Broad based rant about not know WTF you’re doing...