Egress and movement.
WHAT EGRESS IS
Data leaving the provider.
Frequently charged, sometimes substantially.
WHY IT SURPRISES PEOPLE
Storing is cheap. Moving out is not.
WHAT GENERATES IT
Serving files to visitors Downloading backups Moving data between providers Restoring from cloud storage
WHAT TO CHECK
The rate, and what is included
WHAT TO DO ABOUT IT
Serve static content through a delivery network, where cheaper Keep processing close to the data Avoid unnecessary movement between regions or providers
THE REGION POINT
Moving data between regions usually costs.
Keep related resources together.
WHAT TO CONSIDER BEFORE STORING LARGE VOLUMES
What it would cost to retrieve it all.
That figure is your exit cost.
WHAT TO MONITOR
Transfer charges on your bill, separately from storage.
WHAT TO AVOID
Architectures that move large volumes repeatedly.
WHAT TO PLAN
Retrieval, before you need it urgently.
