Read e-book online Advanced Topics In Database Research PDF

By Siau K.

ISBN-10: 1591404711

ISBN-13: 9781591404712

ISBN-10: 1591404738

ISBN-13: 9781591404736

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TEAM LinG Dynamic Workflow Restructuring Framework for Long-Running Processes 25 by executing the corresponding compensations in an order that is the reverse of the original order. Definition 8 (TAM activity) Let α denote an activity pattern and Σ denote a set of activity patterns. Let AD( α) denote a set of activity dependencies specified in α, children(α) denote the set of child activity patterns of α and Pattern(A) denote the activity pattern of activity A. An activity A is said to be a TAM activity if and only if it satisfies the following conditions: • • • ∃α ∈ Σ, Pattern(A) = α.

The only dependency established between them is the compatibility among all split activities and can be represented by compatible construct. The u-Split splits C activity by unnesting the activity hierarchy anchored at C. U-Split operators are effective only on composite activity patterns. A series of specializations are introduced for activity split, including s-Split - serial activity-split, (sa-Split - serial-alternative activity-split), and p-Split Copyright © 2005, Idea Group Inc. Copying or distributing in print or electronic forms without written permission of Idea Group Inc.

Different elapsed time increases could be assumed to perform the simulation experiments. Such assumptions are reasonable because the typical elapsed time of an activity execution is the sum of its CPU-time, I/O-time, and network-transfer-time. Hence, a loss in performance is expected when replacing a computer system by one of lower power. However, such loss hardly matches the same reducing degree of computational power. At least, the network connection remains with the same transfer speed. The second type corresponds to disturbances caused by network delays.

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Advanced Topics In Database Research by Siau K.

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