XRootD S3 Gateway for WLCG Storage

Abstract

The S3 Gateway is a server based application that provides a bridge between protocols and security used in the HEP community to S3 protocols and its associated security model. This allows the use of common copy tools based on the HEP security models to store or download data from S3 based storage. This storage can reside in a public or private cloud. This paper details the motivation for implementing such a service and how it can address certain problem when dealing with storage only accessible via S3 protocol.