منابع مشابه
MapReduce with Deltas
The MapReduce programming model is extended conservatively to deal with deltas for input data such that recurrent MapReduce computations can be more efficient for the case of input data that changes only slightly over time. That is, the extended model enables more frequent re-execution of MapReduce computations and thereby more up-to-date results in practical applications. Deltas can also be pu...
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Deltas are discrete shoreline protuberances formed where rivers enter oceans, semi-enclosed seas, lakes or lagoons and supply sediment more rapidly than it can be redistributed by basinal processes. Generally, deltas are served by well-defined drainage systems which culminate in a trunk stream and supply sediment to a restricted area of the shoreline, thus resulting in the formation of a depoce...
متن کاملSoftware Evolution: Prototypical Deltas
We present a model of the software evolution process. We introduce the notion of a delta, which represents a change in the software’s environment, as a key concept for characterizing the software evolution process. A number of prototypical deltas are presented and characterized in terms of the domains, models, and actors involved.
متن کاملMan made deltas
The review of geochronological and historical data documents that the largest southern European deltas formed almost synchronously during two short intervals of enhanced anthropic pressure on landscapes, respectively during the Roman Empire and the Little Ice Age. These growth phases, that occurred under contrasting climatic regimes, were both followed by generalized delta retreat, driven by tw...
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The dynamic nature of the data on the Web gives rise to a multitude of problems related to the description and analysis of the evolution of such data. Traditional approaches for identifying and analyzing changes are descriptive, focusing on the provision of a “delta” that describes the changes and often overwhelming the user with loads of information. Here, we take an alternative approach which...
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ژورنال
عنوان ژورنال: Journal of Algebra
سال: 1994
ISSN: 0021-8693
DOI: 10.1006/jabr.1994.1172