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CloudFront Lowers Minimum Content Expiration Period
Amazon CloudFront Lowers Minimum Content Expiration Period We're excited to announce that you can now use Amazon CloudFront for frequently changing content. Before today, Amazon CloudFront’s edge locations cached objects for a minimum of 60 minutes. Effective today, we’ve removed the sixty minute minimum expiration period (also known as “time-to-live” or TTL) from Amazon CloudFront. With this change, you have the ability to configure a minimum TTL for all objects in your distribution using the Amazon CloudFront API.
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The Photos application is one of Facebook’s most popular features. Up to date, users have uploaded over 15 billion photos which makes Facebook the biggest photo sharing website. For each uploaded photo, Facebook generates and stores four images of different sizes, which translates to a total of 60 billion images and 1.5PB of storage. The current growth rate is 220 million new photos per week, which translates to 25TB of additional storage consumed weekly. At the peak there are 550,000 images served per second. These numbers pose a significant challenge for the Facebook photo storage infrastructure.
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The ADAPT project (An Approach to Digital Archiving and Preservation Technology) is developing technologies for building a scalable and reliable infrastructure for the long-term access and preservation of digital assets. Our approach uses a distributed object architecture that operates on different levels of abstractions built around cloud technologies and web services. Long term preservation of digital objects requires systematic methodologies to address the following requirements.