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Section: Software
QU4DS
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The QU4DS framework provides PaaS (Platform-as-a-Service) support that fills the gap between the higher-level SaaS (Software-as-a-Service) and the underlying IaaS (Infrastructure-as-a-Service). Qu4DS aids service administrators to define high-level objectives that guide execution management in an automatic and transparent fashion. Moreover, Qu4DS supports the full SLA life-cycle while increasing the service provider profit. SLA support includes service negotiation, instantiation and management on the infrastructure. Orthogonally to these features, complementary actions are in charge of increasing the provider profit guided by SLA constraints.
Currently, Qu4DS targets the development of service providers that use the Master/Worker pattern. Qu4DS assists the development of such services by freeing developers from managing workers and by ensuring their proper execution in accordance with time constraints and by reacting to job failures and delays at runtime. At development time, service developers use the Qu4DS library to develop applications and create a Java jar file. The Qu4DS framework uses this jar file to deploy and manage the service instance on the infrastructure according to SLA constraints.
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