Simple Storage Service (S3) Flashcards
What geographical context are S3 buckets contained?
Regional
How is an object replicated in S3?
Multiple copies of an object in multiple availability zones
What is the durability of an object stored in S3 standard?
99.999999999%
Eleven 9s
What is the availability of an object stored in S3 standard?
99.99%
Four 9s
Difference between durability and availability?
Durability is the probability of data not suffering loss.
Availability is the uptime percentage of an object.
True or false: S3 buckets names must be unique in its given region?
False: Bucket names must be unique globally, meaning no other bucket may be named the same as another across all of AWS.
Define S3
Full managed, highly available, highly durable, cost-effective and widely accessible object-based storage service.
What is the maximum storage s3 offers?
Unlimited
What are the minimum and maximum storage sizes per object in S3?
Minimum = 0 bytes Maximum = 5 terabytes
What are the three storage classes in S3?
Standard
Standard - Infrequent Access
Reduced Redundancy
What security control access controls are present in S3?
Bucket policies, Access Control Lists, Data Encryption, SSL Support
What data management features are in available in S3?
Versioning
Lifecycle rules
True or False: S3 does not integrate with other AWS services?
False: S3 integrates with many AWS service
What are S3 charges primarily based upon?
Amount of storage used
requests
data transfer
Define Amazon Glacier
An extremely low cost, long term storage solution ideally suited for long term backup and archival requirements.
What is the durability rating of Glacier?
Eleven 9s.
While Glacier is much cheaper than S3, what are some of the key differences between S3 and Glacier?
There is no instant access to data
Data is stored in vaults and archives
How many archives are you allowed to make in Glacier?
Unlimited
What can you do in the Glacier console?
You are limited to creating vaults
To move data into and out of Glacier, what are your options?
Glacier service API
AWS SDK
Lifecycle policies
What are the three storage retrieval options?
Expedited
Standard
Bulk
True or False: Encryption is enabled by default in Glacier?
True
What encryption algorithm is used in Glacier?
AES-256
What access control options are available in Glacier?
IAM
Vault access policies
Vault lock policies
True or false: The more storage you use in Glacier, the lower the price per GB?
False: In Glacier, the price is always the same regardless of the amount used.
What is the primary function of Glacier?
Archival of data for extended periods of time for a very small cost.
What is the terminology used to describe the archival of data for extended periods of time?
Cold storage
How is an EC2 instance store volume attached to an EC2 instance?
Directly and physically on the same host as the EC2 instance.
What is the primary function of EC2 instance store?
To provide ephemeral storage for EC2 instances
Why should you not use EC2 storage for critical, valuable data or data with a long term availability need?
If the instance is stopped or terminated, the data on the instance store is lost.
True or false: data stored on EC2 instance store will be lost upon reboot?
False: Data will persist across an instance reboot. Only stopping or terminating an instance will result in data loss.
True or false: EC2 instance store is a separate charge from EC2 compute and memory charges?
False: Instance store is included in EC2 charges.
What advantage does EC2 instance store have?
Very high I/O speeds
Due to I/O speeds of an EC2 instance store, what use cases make sense for instance store?
As a cache or buffer.
