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DIGITAL COMBAT SIMULATOR
FAR CRY 5
FOOD & DRINK
FORTNITE BATTLE ROYALE
FREEDOM OF SPEECH
GOD OF WAR
HEALTH & WELLNESS
RED DEAD REDEMPTION
WORLD WAR 2
'Erlang Factory SF 2016 - Jamshid Mahdavi - An Erlang based Philosophy for Service Reliability 1 '
#bare metal servers
What's app uses
bare metal servers
#six nines service
Aiming to deliver a
six nines service
- fail less than 1 time in a million.
#minimalist pstree of what is running on the server
Minimalist server deploy - the complete
minimalist pstree of what is running on the server
#no code review
#no test automation
#no build servers
WhatsApp doesn't do a bunch of things -
no code review
no test automation
no build servers
#Care instead of safety net
In place of all the things they don't do, they "be careful"
Care instead of safety net
#Deployment practices at WhatsApp
Deployment practices at WhatsApp
#Friction by design
Friction by design
- deployments happen when everyone is in the office.
#WhatsApp does a lot of small deploys
#Erlang permits hot code load
WhatsApp does a lot of small deploys
- usually 3 times a day.
Erlang permits hot code load
#WhatsApp is over 1000 servers
Failure modes -
WhatsApp is over 1000 servers
#Health check monitoring
Health check monitoring
is largely done by a shell script called mon.sh running via cron every minute.
#How alerts are handled
How alerts are handled
#let it crash
let it crash
forces you to fix the error and you don't have to spend a bunch of time writing the code for the error paths, and finding creating ways to test them.
Erlang Factory SF 2016 - Jamshid Mahdavi - An Erlang based Philosophy for Service Reliability 1
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