Dynamic resource of multi attibute resource allocation in selef organization in cloud
Abstract— Dynamic resource of multi attibute resource allocation in selef organization in cloud. Multi-tenant Software as a Service (SaaS) is the cloud computing delivery model that maximizes resource sharing up to the level of a single application instance servicing many customer organizations (tenants) at once. Due to this scale of delivery, a SaaS offering, once successful, becomes difficult to upgrade and evolve without affecting service continuity and tenant businesses profoundly. However, not all tenants are equal, < Final Year Projects > and to some organizations such disruptions are more costly than to others. To account for such tenant-specific requirements, middleware for upgrading SaaS applications should support tenant-specific enactment of upgrades that allow for a customizable schedule and type of enactment in accordance to the tenant SLA. In this paper, we present our design and implementation of a SaaS middleware that enables run-time adaptation by means of a gradual tenant-by-tenant activation of upgrades. The adaptation mechanism is multi-staged, i.e. supports configuration based on the inputs of the tenant administrator and other stakeholders, and is maximally automated. We have validated the middleware in an OSGi-based prototype implementation and evaluated this prototype, showing negligible performance overhead of the middleware and yet clearly showcasing service continuity improvements in realistic upgrade scenarios.
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