acolyer

Internet Scale Services Checklist

A checklist for designing and developing internet scale services, inspired by James Hamilton's 2007 paper "On Desgining and Deploying Internet-Scale Services."

• http://mvdirona.com/jrh/talksandpapers/jamesrh_lisa.pdf

Basic tenets

• Does the design expect failures to happen regularly and handle them gracefully?
• Have we kept things as simple as possible?

ideal-knee

(defmacro better-if-let                                         
  ([bindings then]                                              
     `(better-if-let ~bindings ~then nil))                      
  ([[form tst & rest-bindings] then else]                       
     `(let [temp# ~tst]                                         
        (if temp#                                               
          (let [~form temp#]                                    
            ~(if (seq rest-bindings)                            
               `(better-if-let ~(vec rest-bindings) ~then ~else)
               then))