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THE DATABLITZ™ MAIN-MEMORY STORAGE MANAGER
THE DATABLITZ™ MAIN-MEMORY STORAGE MANAGER

what is the Database abstraction level?
what is the Database abstraction level?

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...  CHECKPOINT FACILITY: By this the DBMS periodically suspends all processing and synchronize its files and journals  RECOVERY MANAGER: Which allows the DBMS to restore the database to a correct condition and restart processing transactions ...
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presentation - University of Reading

... Produce sensible and informative error messages, free of value judgements. Provide help information for each field. Let the user know when the input is complete, and give an opportunity for review. April 2002 ...
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Database Administrator - Santa Barbara City College
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... (reads and writes) within the transactions are sequenced in a way that the result is equivalent to some serial execution (i.e., is as if it was done by a serial execution of transaction operations). Serializability facilitates ATOMICITY, CONSISTENCY and ISOLATION of concurrent, correct transactions, ...
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Miami University
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... Design Tasks. (Conceptual design, DBMS software selection (if required), Logical design, Physical design) Translating Conceptual Model to Relational Schema. ...
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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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