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The Content Migration (CoMig) paradigm for internet content dissemination


Employing network storage to replicate valuable content in close proximity to the end-users has been a successful alternative to keep on adding more network bandwidth or enforcing complex quality of service mechanisms. As a result, the Internet has been seeded by large amounts of storage capacity that now serve as a common substrate for the operation of a diverse set of content delivery methods.

The uncoordinated allocation of storage by multiple authorities, combined with the latest user trend to exchange voluminous information documents (e.g. music and video files, which by latest reports amount to well above of 75% of all Internet traffic), have resulted in a rather limited emphasis on exploiting the new resource up to its full potential, and have set the stage for what appears to be a new contention - this time for storage capacity rather than bandwidth. To this end, the goal of the proposed research is to develop and investigate efficient new ways to best use the deployed storage resource.

The proposed course for achieving that, is by first studying the fundamental aspects of storage-enabled content dissemination in a unified manner - as these issues are common to all content dissemination applications - and then return to mapping the derived results back to the specific applications, in a per-application manner. A new paradigm will be developed for this purpose - called the content migration paradigm - under which, content is not tied to its original emergence point (origin server) and possibly other fixed replication points (mirrors, CDN servers), but is allowed to migrate adaptively to any potential distributor laying on the path towards the demand points (clients), making efficient use of the storage resource that lies on its way.

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