Db and storage Flashcards
What is the difference between instance stores and Amazon elastic block stores (EBS)?
Instance stores are temporary block level storage on an EC2 instance
Amazon EBS permanent block-level storage that remains after instance stops
What is an Amazon EBS snapshot?
all data backed up and any changes after that are backed up
What is Amazon Simple Storage Service (Amazon S3)?
provides object level storage
What are the 3 parts of an s3 object in object storage?
data
meta
key
What 2 factors should you consider when deciding which Amazon S3 service to use?
Frequency (how often will u retrieve data)
Availability
What is the difference between Elastic Block Store and Elastic File System?
Elastic Block Store is single availability zone
Elastic File System is multiple availability zone
Name 8 types of s3 storage?
Standard
Standard Infrequent Access
One-zone Infrequent access
Intelligent tiering
Glacier instant retrieval
Glacier flexible retrieval
Outposts
Suitable storage for infrequent access from 1 location
One-zone infrequent access
Suitable storage for archived data you need to retrieve instantly?
Glacier Instant Retrieval because you can retrieve it in a few milliseconds
You need to store objects close to on premises apps. Which type of S3 storage should you use?
S3 Outposts
Suitable storage for unknown patterns?
S3 Intelligent tiering
Suitable for archived data that needs to be retrieved in a few mins to an hour?
S3 Glacier flexible retrieval
Suitable for archived data you need to retrieve in 12 hours?
S3 Glacier deep archive
You need to access data frequently from a minimum of 3 availability zones. Which type of S3 block storage should you use?
S3 Standard
You only access data occasionally, but need to be able to retrieve it instantly and would not be able to reproduce it in the event of a failure. Which type of S3 block storage should you use?
S3 Standard IA
You only need to access data ocassionally and would be able to easily reproduce the data in the event of a failure. Which type of S3 block storage should you use?
S3 One Zone-IA
You aren’t sure which s3 storage to use because of unknown changing patterns. Which type of S3 block storage should you use?
S3 Intelligent-Tiering
If you don’t access an object for 30 days in a row, it will move you to S3 Standard-IA
If you access an object, it automatically moves it to the frequently accessed tier S3 standard
What service do you use from relational dbs?
RDS (relational database service)?
Name the relational db?
Aurora
Name the key-value pair, nosql db?
Dynamodb
What data warehousing service can you use for big analytics?
Redshift
Name 3 areas database migration service helps with when migrating a db store?
- Developing and testing migration
- Consolidation
- Continuous replication
