Glacier
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Glacier is a low cost Cold-Data-Storage service used for data archival. It exposes a REST interface. “Archive” and “Vault” are the two main components in Glacier service.
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The Simple Storage Service is a secure, durable, highly scalable and highly available Object Storage by AWS. Object Store means we can store Files but cannot install software. S3 provides easy to use, web service interface to store/retrieve any amount of data from anywhere.
Vipul Pathak 