Domain 3: Technology - Storage Flashcards
How large can individual S3 files be?
5 TB
What is the S3 maximum storage allowed?
No limit
What are the types of URL formats for S3 bucket access?
Virtual hosted style
Path style
When you upload a file to S3, success is indicated by …..
An HTTP 200 code
What is the data consistency model for S3?
Why does it work that way?
Read after Write - New object PUTS
Eventual Consistency - Overwrite PUTS and DELETES
Propagation across AZs can take time for updates and deletes
What are the characteristics of an S3 object?
Key - Name of the object
Value - Binary data
Version ID
Metadata
ACL - individual permissions
What are the S3 SLA guarantees for availability and durability?
99.9% Available
11 x 9 Durability
What are the features that S3 buckets support?
Lifecycle Management
Versioning
Encryption
ACL Security (individual files)
Bucket Level Security
What are the available S3 storage classes?
S3 Standard
S3 - IA
S3 One Zone - IA
Glacier
What are the features of the S3 Standard storage class?
99.99% Availability
11 x 9 Durability
- 9% Availability Design
- 9% Availability SLA
No data retrieval fee
Stored across multiple disks and AZs
Designed to sustain loss of 2 facilities
What are the features of the S3 - IA storage class?
Used for data accessed less frequently but requires rapid retrieval when needed
11 x 9 durability
99.9% Availability Design
99% Availability SLA
Per GB retrieval fee
Multiple AZ storage
Lower cost the standard but charges for retrieval
What are the features of the S3 One Zone IA storage class?
Lower cost than S3 - IA
Only stored in 1 AZ
11 x 9 durability
99.5% Availability Design
Per GB retrieval fee
99% Availability SLA
No multiple AZ storage
What are the features of the Glacier storage class?
Very inexpensive
Used for archival purposes only
3 retrieval levels:
Expedited (minutes),
Standard(3-5 hours)
Bulk (5-12 hours)
Per GB retrieval fee
What are the potential sources of charges for S3 buckets?
Storage
Requests
Tags
Data Transfer (replication)
Transfer Acceleration
What are the parts of a virtual hosted S3 bucket URL?
The bucket name is part of the domain name
http://bucket_name.s3.amazonaws.com
or
http://bucket_name.s3-aws-region.amazonaws.com
What are the parts of a path style S3 bucket URL?
The endpoint must match the region
http://s3-aws-region.amazonaws.com/bucket_name
Where are EBS volumes stored?
Virtually and Replicated across an AZ
What are the available EBS Volume Types?
GP2 - General Purpose 2
IO1 - Provisioned IOPS
ST1 - Throughput Optimized
SC1 - Cold HDD
Standard - Magnetic
What are GP2 volumes and when are they used?
General Purpose SSD
< 10,000 IOPS
What are IO1 volumes and when are they used?
Provisioned IOPS SSD
I/O intensive apps
large RDS or NoSQL DBs
> 10,000 IOPS
What are ST1 volumes and when are they used?
Throughput Optimized HDD
Big Data
Data Warehouses
Log Processing
Cannot be a boot volume
What are Cold HDD volumes and when are they used?
Lowest Cost per GB of all EBS bootables
Infrequently accessed workloads
lowest storage cost important
What are Magnetic Standard EBS volumes?
Previous generation magnetic
Can be boot volume
How does S3 Transfer Acceleration Work?
Users worldwide upload to Edge Locations
Edge Locations replicate to your S3 bucket
How can objects in transit to S3 be encrypted?
Using SSL
Websites can be hosted on S3 but what are the limitations?
Static files only (html, javascript)
Cannot use database connections
