Download Data Management for Mobile Computing by Evaggelia Pitoura PDF

By Evaggelia Pitoura

Earth date, August eleven, 1997 "Beam me up Scottie!" "We can't do it! this isn't famous person Trek's firm. this is often early years Earth." actual, this isn't but the period of famous person Trek, we can't beam captain James T. Kirk or captain Jean Luc Pickard or an apple or the rest anyplace. What we will do even though is beam information regarding Kirk or Pickard or an apple or an assurance agent. we will be able to beam a list of a sufferer, the prestige of an engine, a climate document. we will be able to beam this data at any place, to cellular employees, to box engineers, to a tune loading apples, to ships crossing the Oceans, to internet surfers. we have now reached some extent the place the promise of knowledge entry at any place and every time is just about awareness. The permitting know-how, instant networks, exists; what is still completed is delivering the infrastructure and the software program to aid the promise. common entry and administration of data has been one of many riding forces within the evolution of laptop know-how. significant computing gave the power to accomplish huge and intricate computations and complicated details manipulation. Advances in networking hooked up desktops jointly and ended in allotted computing. internet expertise and the net went even extra to supply hyper-linked details entry and worldwide computing. in spite of the fact that, limiting entry stations to actual place limits the boundary of the vision.

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For instance, a server at the mobile host cannot be continuously active because, to conserve power, the mobile host may be switched-off or operating in the doze mode. A mechanism to automatically start applications on demand [20J is useful in such cases. There are certain applications for which the peer-to-peer model is adequate [144J. Consider the case of two partners performing cooperative work on some data using their portable computers. In a client/server model, they cannot trade their updates directly.

The intercept model is transparent to both the client and the server. Therefore, the agent pair can be employed with any client application. The communication protocol between the two agents can facilitate highly effective data reduction and protocol optimization without limiting the functionality or interoperability of the client. The cooperation of the two agents allows for more efficient optimizations of the wireless link for the benefit of different applications. In addition, application specific optimizations can be more effectively realized by the agent pair.

An alternative way to validate the cache is by initiating coherency checks only on object references.

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