Page 126 - Cloud computing: From paradigm to operation

1 Framework and requirements for cloud computing

Two kinds of metadata are shown in Figure 6-3 as follows:

– Data operation metadata is a description required to perform data operations. It includes the
attributes of virtual storage pool and single virtual volume. It includes a transaction log and DSF data
attributes of read/write caching, snapshot, replication, fragmentation, etc.
– Storage operation metadata is a description required to perform storage operations. It includes the
location of DSF local storage, interface, API for customer data operation, read/write speed, storage
capacity, etc.

6.4 Ecosystem of data storage federation
This clause identifies roles and sub-roles of the DSF ecosystem. In addition, relationships among roles and
sub-roles are specified.

Figure 6-4 – Data storage federation ecosystem

DSF service is a service to provide single virtual volumes and policies and it is offered by a DSF service
provider.
The DSF ecosystem includes the following roles as shown in Figure 6-4:
– DSF service customer;
– DSF service provider;
– DSF local storage provider.

6.4.1 DSF service customer
The DSF service customer uses a DSF service including a single virtual volume and policies from a DSF service
provider. A DSF service customer's activity includes:
– Use of DSF service.

6.4.2 DSF service provider
The DSF service provider federates DSF local storages and provides a DSF service with an access mechanism.

The DSF service provider role consists of two sub-roles:
– Storage federation provider;
– Data manipulation provider.
6.4.2.1 Storage federation provider

The storage federation provider (SFP) provides a single virtual volume by federation of DSF local storages. A
storage federation provider's activities include:
– provide virtual storage pool;

– provide single virtual volume;
– manage storage management metadata;
– manage data storage policy.

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