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Big data - Concept and application for telecommunications                       5


            I.2     Data sharing between customers

                   Title                              Data sharing between customers

             Description       In this scenario, the DSF service customer #1 stored file A~D with data sharing mode policy
                               setting. The file A is non-sharing mode, the file B is read-only data sharing mode, the file C is
                               over-writable data sharing mode and the file D is replicable data sharing mode. The other DSF
                               service customer #2 uses file A~D with data sharing policy set by DSF service customer #1.
                               DSF service customer #2 cannot access file A because of non-sharing mode policy setting and
                               DSF service customer #2 can read file B but it is not writable. In file C case, DSF service
                               customer #2 can overwrite it and store it with changes. In file D case, by a replication request
                               by DSF service customer #2, the original file D is preserved and a new file E is generated and
                               stored to DSF service customer #2's single virtual volume.
             Role/sub-role     DSF service provider (CSP:DMP)
                               DSF service customer (CSC:CSU)
             Figure (optional)























             Pre-conditions
             (optional)
             Post-conditions
             (optional)

             Derived           –  Clause 8.1 requirement (2)
             requirements





























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