Page 274 - Big data - Concept and application for telecommunications

5 Big data - Concept and application for telecommunications

Appendix I

Use case of data storage federation
(This appendix does not form an integral part of this Recommendation.)

I.1 Storing a user file dispersedly

Title Storing a user file dispersedly
Description In this scenario, a data storage customer having two data storages on DSF local storage
requests a large file storing from a DSF service provider. The DSF service provider splits the
file into several parts in case that DSF local storage have not enough space (Case 1) or needs
to access it in parallel for better performance (Case 2) and stores the parts into different
distributed DSF local storages.
Role/Sub-role DSF service provider (CSP:SFP)
DSF service customer (CSC:CSU)
Figure (optional) Case 1: limited capacity of data storage in DSF local storage

Case 2: CSC:CSU's parallel access requirement

Pre-conditions – CSP:SFP is available to access DSF local storage.
(optional) – CSC:CSU requests a single virtual volume to CSP:SFP.
Post-conditions
(optional)
Derived – Clause 8.1 requirement (2)
requirements – Clause 8.4 requirement (2)
– Clause 8.1 requirement (4)

266 Network and infrastructure