AWS S3

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Charges

Amazon S3 offers a flexible pricing model with charges based on storage, data transfer, and requests.
No charge for data transferred between EC2 and S3 in the same region.
Data transfer into S3 is free of charge.
Data transferred to other regions is charged.
Data Retrieval (applies to S3 Standard-IA and S3 One Zone-IA, S3 Glacier and S3 Glacier Deep Archive).
Charges are:
Per GB/month storage fee.
Data transfer out of S3.
Upload requests (PUT and GET).
Retrieval requests (S3-IA or Glacier).
Requester pays:
The bucket owner will only pay for object storage fees.
The requester will pay for requests (uploads/downloads) and data transfers.
Can only be enabled at the bucket level.

Best Practices to Manage Costs

Optimize Storage Class: Use appropriate storage classes based on access frequency (Standard, IA, One Zone-IA, Glacier, Deep Archive).
Lifecycle Policies: Automate data transfer between storage classes to optimize costs.
Data Transfer Management: Minimize inter-region data transfers and use CloudFront for frequently accessed data.
Requester Pays: Enable the requester pays option for buckets accessed by external users to offload request and data transfer costs.
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