Page 130 - Cloud computing: From paradigm to operation

1 Framework and requirements for cloud computing

8 Functional requirements for data storage federation

This clause describes the requirements for data storage federation.

8.1 Storage connection requirements
(1) It is required that CSP:SFP provide an interface to connect DSF local storage.
NOTE 1 – The interface to DSF local storage refers to the direct interfaces (i.e., object or block storage
interface), or a proxy interface to configure several types of storages interface with a software program.
NOTE 2 – The software program includes software agent, daemon, web worker and RESTful API for an
interface to DSF local storage.
NOTE 3 – The proxy interface connects DSF local storage by automatically detecting the interface with a
software program.
(2) It is required that CSP:SFP provide a user interface for CSC:CSU to use a single virtual volume.
NOTE 4 – User interface includes graphical user interface, web application, or specific client for CSC:CSU to
access a single virtual volume.
(3) It is recommended that CSP:SFP support the change of CSC:CSU's access mechanism according to
the storage type of single virtual volume.

(4) It is required that CSP:DMP provide translation between data operation and a corresponding
interface of DSF local storage.
NOTE 5 – Corresponding interface include API, I/O interface, etc.

(5) It is recommended that CSP:SFP provide a secure access mechanism to use a single virtual volume
for CSC:CSU.
(6) It is required that CSP:DMP provide the registration of the CSC:CSU's requirements.

NOTE 6 – The requirements of CSC:CSU include data storage capacity, access mechanism, storage types of
single virtual volume, policy, etc.
(7) It is required that CSP:SFP provide the seamless connection of DSF local storage interface to
communicate with DSF local storage.

8.2 Data manipulation requirements
(1) It is required that CSP:DMP provide the execution of CSC:CSU's create, read, update, delete (CRUD)
data operation.
NOTE 1 – CRUD data operation includes create, read, update and delete data.
(2) It is required that CSP:DMP provide a search data operation from CSC:CSU's data using query to a
global registry.
(3) It is recommended that CSP:DMP provide a sharing data operation by updating of sharing status of
DSF data in a global registry after checking sharing status of DSF data.
NOTE 2 – Data sharing means that the same DSF data is shared during data operation.
NOTE 3 – Sharing status of DSF data is information about whether DSF data is shared or not.
(4) It is recommended that CSP:DMP provide the capacity saving of data storage using de-duplication
of DSF data.

(5) It is recommended CSP:DMP provide DSF data encryption/decryption for data transfer to DSF local
storage.
(6) It is required that CSP:DMP provide data recovery of CSC:CSU from system failure.

NOTE 4 – Data recovery refers to restoring the most recently used CSC:CSU's data preventing data loss due to
errors from the storage and network connection failure.
(7) It is recommended that CSP:DMP provide DSF data migration to available DSF local storage for
resilience and cost efficiency of the storage space.
NOTE 5 – The data migration for the resilience and cost efficiency of the data storage space is automatically
performed without user intervention or recognition.

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