57. YOU CAN’T SCALE
TO REAL TIME
and don’t trust code that doesn’t run continuously
×
58. DO YOU REALLY
NEED A BACKUP?
if you got 3x replication over multiple
availability zones, is that backup really worth it?
59. PRODUCTION IS THE
ONLY REAL TEST
ENVIRONMENT
when thousands of things happen every second,
new, weird and unforeseen things happen all the time,
your tests can only cover the foreseeable
=