Softwareasa Service(SaaS) is used to offer different kinds ofsoftwareapplications in a Cloud environment. Generally theseare offered on
subscription basis. Differentmodes ofSaaS are:
I. Simple multi-tenancy :In this setup,each client gets its own resources. Theseresourcesare notshared with otherclients. It is
moresecure option, sincethereis no sharing ofresources. But itan inefficient option, sinceforeach clientmore money is needed to
scaleit with therising demands. Also it takes timeto scale up theapplication in this mode.
II. Fine grainmulti-tenancy :In this mode, thefeature provided to each client is same. Theresourcesareshared amongmultiple
clients. It isan efficientmode ofcloud service, inwhich datais kept privateamong differentclients butcomputing resourcesare
shared. Also it iseasierand quicker to scale up the SaaS implementation for differentclients.
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