There are the following types of clients components in a Bit Repository system:
Pillars are responsable for maintaining copies of the store material and providing bit preservation related operations on these
There are the following types of pillars seen from the data perspective:
- A full copy pillar, which contains full copies of delivered files identified uniquely with a service level agreement
- A checksum pillar (with specific checksum type), which contains derived copies of delivered files, in form of a checksum. The checksums are identified uniquely with a service level agreement in the same way as for full copies pillars.
Clients which can be used to perform operations on the bit repository, e.g. PutFile, GetFile. See Operations for a full listing.
Services actively perform tasks without user triggering, see Reference services for examples of services.
Provides the communication infrastructure for integrating the components. This consists of:
- Components have no direct knowledge of each others location. Communication is rather performed indirectly by using the specified Queues and topics.
- All communication is asynchronous.