Caching strategies in Supabase - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is caching in cloud infrastructure?

Caching is a way to store copies of data temporarily so that future requests for that data can be served faster without fetching from the original source every time.

beginner

Name a common caching strategy used to keep data fresh.

Time-to-Live (TTL) is a common caching strategy where cached data expires after a set time, forcing a refresh from the original source.

intermediate

What does 'cache invalidation' mean?

Cache invalidation means removing or updating cached data when it becomes outdated or incorrect, so users get the latest information.

advanced

Explain the difference between 'write-through' and 'write-back' caching.

Write-through caching updates the cache and the main storage at the same time, ensuring consistency. Write-back caching updates the cache first and writes to main storage later, improving speed but risking data loss if not handled carefully.

beginner

How can caching improve performance in Supabase applications?

Caching reduces the number of database calls by storing frequent query results temporarily, which speeds up response times and lowers server load.

What is the main purpose of caching in cloud apps?

A To permanently store all data

B To encrypt data for security

C To delete old data automatically

D To speed up data access by storing copies temporarily

Caching stores data copies temporarily to serve future requests faster.

Which caching strategy removes data after a set time?

A Time-to-Live (TTL)

B Write-through

C Write-back

D Cache warming

TTL sets an expiration time for cached data to keep it fresh.

What does cache invalidation do?

A Adds new data to cache

B Removes or updates outdated cached data

C Encrypts cached data

D Duplicates cached data

Cache invalidation ensures cached data stays accurate by removing or updating old data.

In write-through caching, when is data written to main storage?

A At the same time as cache update

B Only on cache miss

C Never

D Only after cache is full

Write-through updates both cache and main storage simultaneously.

How does caching help Supabase apps?

A By increasing database calls

B By slowing down response times

C By reducing database calls and speeding responses

D By deleting user data

Caching reduces database calls and speeds up app responses.

Describe three common caching strategies and how they help keep data fresh.

Think about how cached data stays accurate and when it gets updated or removed.

Explain why caching is important in cloud applications like Supabase and how it improves user experience.

Imagine waiting for a webpage to load with and without caching.