Abstract: Linked databases including a core database and a distribution database support provisioning for computers in pay-per-use and subscription business models. The core database is well removed from front-end processing and includes job, device and bootstrap tables. The distribution database includes tables for packet distribution and logging and is near the front-end processing blocks. The core database is well protected from attack, while the more volatile data in the distribution database is available with low latency. Performance is maintained while reducing the surface area exposed to external attack.

Abstract: An application program interface (API) for sending and receiving batches of requests and responses has a batch request call for exchanging one or more request items between a provider system and a subscription system and a batch response call for exchanging corresponding responses between the provider system and the subscription system. Requests are grouped according to an extensible markup language schema and responses are grouped according to another extensible markup language schema.