Archive
php
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One EC2 box to a load balancer, RDS and S3
A hand-built single server became two instances behind an Application Load Balancer, with RDS, Redis sessions and S3 uploads. The health check, the cron table and the invoice are the parts nobody warns you about.
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Push notifications in a back office, with service workers
Six weeks of putting browser push into an internal admin: registration and permissions, why Chrome still needs a GCM sender id, sending from PHP, and the two failures that only production found.