big data in healthcare Vedang Manerikar - Dead Simple Scalability Patterns

This talk will highlight development patterns that are easy to catch in code review and go a long way in improving the life of your system. For example,

Do not make an unbounded number of DB calls in any request
Bad Idea: For each person who retweeted “Ellen’s Oscar Selfie”, fetch their avatar from the DB
Do not fetch an unbounded amount of data from the DB
Bad Idea: Fetch all users who retweeted “Ellen’s Oscar Selfie”.
Build timeouts into every network call made by the system
Bad Idea: Wait forever for this list of RT users to load, don’t render the page until this happens
Slides will list out a large number of “obvious” (and some not-so-obvious) strategies that all distributed systems engineers should follow. For example,

Data Projections - Fetch the absolute minimum amount of data required to satisfy a request from the DB
Simple Profiling - Count the number of DB calls you make to serve a request end-to-end
Essential Monitoring - Measure statistics to determine usefulness. Do you know your cache hit vs cache miss ratio?
Awareness of Limits - What is the volume throughput limit on Amazon EBS volume?
I will also talk about architectural patterns that should be baked in from Day 1. For example,

Separation of concerns using Message Queues
LRU caching for permanent, unchanging data
Version numbers in the schema for feature roll outs

big data in healthcare Vedang Manerikar - Dead Simple Scalability Patterns
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