What is S3?
Amazon S3 is storage for the Internet. S3 means simple storage service. S3 is highly-scalable, reliable (99.999999999% durable), low-latency data storage infrastructure and is offered at very low costs. S3 is object based storage and it can contain any kind of files ranging from 0KB to 5TB in size. S3 offers unlimited amount of data storage.
Objects in S3 can be directly accessed from the internet via URL if configured to do so. S3 can take care of any spikes in load and developers do not need to worry about the spikes in load.
AWS S3 Online Course
Check out the AWS S3 online course. The course covers beginners and advanced level topics on S3 including lifecycle policy, event notifications, replication, security, logging and monitoring. It also covers topics around accessing data in S3 and performance optimisation and website hosting.
Recent Updates
- S3 has introduced a new command - S3 Select Command - that allows querying the data in a S3 object.
- Nov 2017: the S3 console has a new filter "Access" that classifies the buckets as "public" or "not public". (Note that the objects within the bucket might still be publicly available via object ACL).
S3 supports many of the features like encryption, versioning, hosting websites, data replication across regions which makes it a very good choice for storing data.
Where is the data stored?
When logged into AWS console, user creates buckets in a region and the data in S3 is stored in this buckets for the user. The data in the buckets are redundantly stored on multiple devices across multiple facilities.
Which region is the data stored?
Data is stored in a region which is chosen by the user. The user should choose a region depending on the proximity of the application using the data. AWS has data centers around the world and have regions in almost all continents including, Asia, America, Europe and Australia.