2.7 Observations from GMPCS Model
Based on the above model, several observations can be made as follows.
Observation_1:
According to an interoperability feature between CSPs, a storage service will be hosted over a pool of resources that are in different geographical locations. Furthermore, different technologies, protocols, and security strategies are applied by each CSP within its datacentres to facilitate managing an environment to protect both resources and data. The technologies and strategies, therefore, might be disparate in terms of efficiency, and the type of storage network or storage system might be varied as well. Additionally, risks associated with outage or lock-in of a single CSP are reduced. This provides a high level of availability and reliability for the service.
Observation_2:
CSUs can use different types of devices, for example, a laptop or a mobile device to access the storage service. A CSP uses notification servers to synchronise the CSUs’ files between the devices.
Observation_3:
As seen in the model, each CSP uses a database server to store and manage metadata. Therefore, the database can be any type such as SQL, Not Only SQL (NOSQL), or other.
Observation_4:
The CSP needs to apply a virtualization technology on storage resources to serve CSUs’ demands efficiently. Therefore, a
…show more content…
The first one involves a full copy of the data being sent to each CSP. Another is to divide the data into several blocks; sub-blocks are then sent to each CSP, and to retrieve all the data it is necessary to obtain all the blocks from all the CSPs. Both of these strategies can be efficient for lock-in or downtime problems in a single CSP. On the other hand, the second strategy can be more secure against a dishonest CSP. The CSP cannot retrieve the full original data and breach its privacy and confidentiality. Furthermore, communication and storage overhead on each CSP are