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Check: storage

Knowledge check · 5 min · Module 3, lesson 3 of 35 min left in this module

Module 3 · StorageLesson 3 of 3

Goal: Confirm you can predict what survives a replaced server and pick block, file or object storage for a piece of data.

Four questions: three on this module, one on Module 1. Every answer explains itself, right or wrong.

Your app keeps logged-in sessions in a variable in memory. It restarts on the same server. What happens to the sessions?
Which data can safely live on a server's local disk?
You need to keep a year of nightly backup files, cheaply. Which kind of storage?
From Module 1: your app runs on a PaaS and keeps user files in a bucket you set up. Who decides where those files live and whether they're backed up?

Retry as often as you like.

Before you go, name each part.

Storage at a glance: from memory

Name each part before you reveal it.

Gone when its server is replaced.
A raw disk for one server.
A folder many servers share.
Whole files by key, over HTTP.
The four ideas in this module.