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Abstract: This is a position paper on multi-tenant databases. As motivation, it first
describes the emerging marketplace of hosted enterprise services and the
importance of using multi-tenancy to handle high traffic volumes at low cost. It
then outlines the main requirements on multi-tenant databases: scale up by
consolidating multiple tenants onto the same server and scale out by providing an
administrative framework that manages a farm of such servers. Finally it describes
three approaches to implementing multi-tenant databases and compares them based
on some simple experiments. The main conclusion is that existing database
vendors need to enhance their products to better support multi-tenancy.