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Messaging Framework - Microsoft Center
Messaging Framework - Microsoft Center

... We don’t know much about using the cloud, it’s probably complicated and what we are doing now works. ...
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... data models A collection of concepts describing how structured data is represented and accessed Within a data model, the schema is a set of descriptions of a particular collection of data The schema is stored in a data dictionary and can be represented in SQL, XML, RDF, etc. In semantics a data mod ...
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... 2. Validation phase: Transaction Ti performs a ``validation test'' to determine if local variables can be written without violating serializability. 3. Write phase: If Ti is validated, the updates are applied to the database; otherwise, Ti is rolled back.  The three phases of concurrently executing ...
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... dictionary as they exist on a storage device • DBMS engine separates the logical from the physical ...
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... Of particular importance are four online data integrity requirements known collectively as the ACID principle: • Atomicity - from a user perspective, a transaction is either completed in its entirety (i.e., all relevant database tables are updated) or not at all • Consistency - all integrity conditi ...
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Cloning - PeopleSoft Technology SIG
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... statement. Having a SQL statement is having a fully functional report. Then query formatting parameters can be defined to get a graph, sub-totals, cube etc. • Very easy to change or add a new report. ...
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Concurrency control

In information technology and computer science, especially in the fields of computer programming, operating systems, multiprocessors, and databases, concurrency control ensures that correct results for concurrent operations are generated, while getting those results as quickly as possible.Computer systems, both software and hardware, consist of modules, or components. Each component is designed to operate correctly, i.e., to obey or to meet certain consistency rules. When components that operate concurrently interact by messaging or by sharing accessed data (in memory or storage), a certain component's consistency may be violated by another component. The general area of concurrency control provides rules, methods, design methodologies, and theories to maintain the consistency of components operating concurrently while interacting, and thus the consistency and correctness of the whole system. Introducing concurrency control into a system means applying operation constraints which typically result in some performance reduction. Operation consistency and correctness should be achieved with as good as possible efficiency, without reducing performance below reasonable levels. Concurrency control can require significant additional complexity and overhead in a concurrent algorithm compared to the simpler sequential algorithm.For example, a failure in concurrency control can result in data corruption from torn read or write operations.
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