MatrixStore Cloud integrates with public cloud through move2S3 and their S3 interfaces/gateways.
move2S3 is aware of AWS Storage Tiering in the archiving and the restoring process.
Archiving
move2S3 sends objects to S3 buckets. Once in S3, those object can transition to Glacier tiers either by used-defined policies in move2S3 configuration or by lifecycle policies defined directly in the buckets.
If objects are moved to other tiers, move2S3 will be aware of that at the moment of restoring them or if the user demands for the latest status through move2S3 interfaces.
Restoring
move2S3 is capable of recognising when an object has been moved to lower tiers from S3 so when move2S3 tries to restore the object, it will ask AWS to transition the object back to S3 first and then move2S3 will restore it back to MatrixStore, both operations in a transparent way to the user.