Database services

Question 1

What are some examples of relational data base services in AWS?

Answer 1

Aurora and RDS

Question 2

What service uses key-value databases and what is the advantage of such a database?

Answer 2

DynamoDB, key-value databases are optimised for common access patterns so they store and rapidly retrieve large volumes of data

Question 3

What in-memory databases can be found in AWS and what is this type of database useful for?

Answer 3

ElastiCache, in-memory is useful for real time data it is compatible with Redis and Memcached data structures

Question 4

What graph database service is available on AWS?

Answer 4

Neptune

Question 5

What is QLDB

Answer 5

Quantum Ledger DataBase - a blockchain ledger database - uses a centralised authority

Question 6

What is an example of a service used in AWS that is compatible with MongoDB and what form of data does MongoDB use?

Answer 6

DocumentDB, json - document data

Question 7

How might someone migrate a database in AWS?

Answer 7

DMS

Question 8

When should what are the use cases for Aurora and RDS?

Answer 8

Aurora for Prostgre SQL and MySQL and RDS for all other relational DBs