AWS Storage
Amazon
Simple Storage Service (S3)
Definition
S3 is an Object Store
Secure, durable, and highly-scalable cloud storage
Optimized for
reads
and intentionally light weight
Accessible from anywhere on the web
One of the AWS Foundational Services
Features
Storage Classes
Lifecycle Policies
Rich set of Access Controls
Replication is Automatic:
Scalability - Automatically partitions buckets
Amazon
Glacier
Definition
S3 optimized for long-term backup and archival.
3-5 hour retrieval time
Dual Product Offering
An S3 Storage Class
Archival Storage Service
Amazon S3
Background
Types of Storage
Block - Storage Device Level
Organizes data into numbered, fixed size blocks
File - Server and Operating System Level
Organizes data into named hierarchy of folders and files
Object
Independent of Servers, Operating Systems
Accessed over a network
The native interface for S3 is a ReST API.
S3 Basics
S3 Object Characteristics
Each S3 object contains BOTH data and metadata
Each S3 object is uniquely identifed by:
<bucket><key>[<versionId>]
Max Size = 5 terabytes
Operations (GET, PUT) are on
whole
objects
Data
S3 treats all objects as a stream of bytes.
S3 is completely format agnostic
Metadata
A set of name/value pairs
System metadata with object characteristics.
Optional User metadata
Bucket Characteristics
A bucket is a container (web folder) for objects (files) stored in S3.
Each account may define 100 buckets
Buckets are created and stored within specific AWS regions
Buckets are the
top-level, global namespace
in S3
Must be globally unique across all AWS
Naming Conventions
Can hold an unlimited number of objects
A simple
flat folder
with no hierarchy
Note: Console Folder Hierarchy
Accessing S3 Objects
Operations
Intentionally simple
Based on a ReST implementation of CRUD operations
Bucket Operations
Create, Delete, List
Object Operations
Write, Read, Delete,
Note: the absence of an Update. Why?
Accessing S3 Objects
Direct Interface
Representationale State Transfer (ReST)
Create, Read, Update, Delete (CRUD) operations mapped to HTTP methods
Ref:
POST Object
Create -> HTTP PUT (or POST to accomadate use of HTML forms)
Read -> HTTP GET
Update -> HTTP POST ( or PUT)
Delete -> HTTP DELETE
Accessing S3 Objects
High Level Interface
AWS Software Developement Kit (SDK)
Wrapper Libraries
AWS Command Line Interface (CLI)
AWS Management Console
Accessing S3 Objects
Durability
Will my data still be there ?
S3 is 99.999999999% durable
Availability
Can I access my data ?
S3 is 99.99% available
Reduced Redundancy Storage (RRS)
Reduced Cost Alternative
RRS is 99.99% durable
Best Practice
Protect against user mistakes
Versioning
Cross-Region Replication
MFA Delete
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