Adding Read Replicas in a Production Ruby on Rails System with Zero Downtime Using Makara
Adding Read Replicas in a Production Ruby on Rails App with Zero Downtime Thaddaeus LimWhen query, schema and index optimizations aren’t enough to support the load of a high throughput database system, fundamental changes in how data flows through that system are often necessary. Over the past few years, our team at Compass has been fortunate enough to tackle numerous database performance issues,
Replication
Similar to most web applications that don't have millions of users, our simple server architecture sufficed for the first couple years of our company. Two front-end servers (EC2 instances), one load balancer, and one database server (RDS instance). Apart from the occasional press hit where we had to fire up five or six additional front-end servers, this setup served us well. Up until recently. Hav
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