Invoca Engineering Blog

The 6 W’s of Running a Disaster Simulation

(What, Why, When, Where, Who, and most importantly… hoW)

Bringing back Rails IdentityMap caching

Once upon a time, Rails had a feature under ActiveRecord called: IdentityMap.

S3 Region Failover and Alerting

Once upon a time, there was an AWS S3 outage for the US-EAST-1 region which lasted ~5 hours. This led to…

Santa Barbara Capture the Flag Version 4

We just finished up our fourth capture the flag event in…

Logging metrics for Rails web requests using Active Support Instrumentation

Ruby Constants with Rails (and How to Avoid the “already initialized constant X” Warning)