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Storage

Demystifying Python, Boto3, and AWS S3 Joe Tatusko 03:50

Every object that you add to your S3 bucket is associated with a storage class. All the available storage classes offer high durability. You choose how you want to store your objects based on your application’s performance access requirements.

At present, you can use the following storage classes with S3:

STANDARD: default for frequently accessed data
STANDARD_IA: for infrequently used data that needs to be retrieved rapidly when requested
ONEZONE_IA: for the same use case as STANDARD_IA, but stores the data in one Availability Zone instead of three
REDUCED_REDUNDANCY: for frequently used noncritical data that is easily reproducible

If you want to change the storage class of an existing object, you need to recreate the object.

00:00 At its heart, S3 is a storage service. To meet the needs of each project, it offers a number of storage classes to provide the performance required for each use case. Unlike changing the ACL for an object, if you want to change the storage class, you’ll need to recreate the object.

00:18 Let’s test this out on the third file that you used for encryption. Go ahead and grab that third_object,

00:27 and we’re going to re-upload the file.

00:33 Pass in the third_file_name and then also some ExtraArgs.

00:45 Like before, add that 'ServerSideEncryption',

00:51 which was 'AES256',

00:59 and then add another argument, which is going to be 'StorageClass'.

01:07 So here, the storage class determines what type of storage your object will be stored in. You have a couple options. You can do something like 'STANDARD', and this is kind of your default for frequently accessed data.

01:22 If you have something that will be accessed infrequently, you can add an '_IA' to that for infrequent access. This class is designed for things that would be used infrequently, but when they are used, they need to be retrieved rapidly.

01:38 The default for STANDARD_IA is three availability zones at least, but if you only need one zone, you can change that to 'ONEZONE_IA'.

01:50 And then finally, for something that’s frequently used but is non-critical and can be recreated easily, you can do a storage class that’s 'REDUCED_REDUNDANCY'.