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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 3. Отображено 3.
17-06-2015 дата публикации

Incremental and collocated redistribution for expansion of an online shared nothing database

Номер: GB0002521197A
Автор: CLIFFORD AUSTIN [GB], FITZSIMONS GARRETT [GB], CIALINI ENZO [GB], CLIFFORD AUSTIN, FITZSIMONS GARRETT, CIALINI ENZO, AUSTIN CLIFFORD, GARRETT FITZSIMONS, ENZO CIALINI
Принадлежит:

This invention relates to a system, method and computer program product for redistribution of data in an online shared nothing database, said shared nothing database comprising a plurality of original partitions and at least one new partition. The method comprises identifying two or more collocated tables in the original partitions to be redistributed over the original partitions and at least one new partition, said tables having data rows, each data row residing on a partition governed by a distribution key. New tables are created in the new partition and a UNION ALL view of all the data from both the original and new tables using the check constraints is created, said check constraints based on the distribution keys. A loop of intervals is defined over the distribution key range, and a data mover performs data movement of each data row over the current distribution key interval from the original tables to the new tables. The check constraints are altered for each distribution key interval ...

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Номер записи: 1
20-11-2013 дата публикации

Performance analysis of a hypothetical database

Номер: GB0002502098A
Автор: CLIFFORD AUSTIN [GB], MCCALLIG ENDA [GB], EMANOWICZ KONRAD [GB], CLIFFORD AUSTIN, MCCALLIG ENDA, EMANOWICZ KONRAD, AUSTIN CLIFFORD, ENDA MCCALLIG, KONRAD EMANOWICZ
Принадлежит:

Method for performance analysis of a database includes: providing a proposed data model as supplied by a designer; generating a hypothetical query workload; generating hypothetical optimizer statistics; creating an empty database and a database schema using the proposed data model; applying the hypothetical optimizer statistics to the sample empty database; once hypothetical optimizer statistics are set, applying each query of the hypothetical query workload to the database; and estimating the cost of the hypothetical query workload for the proposed data model. The method preferably includes refining the proposed data model and iterating the estimate of the cost of the hypothetical query workload.

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Номер записи: 2
23-10-2013 дата публикации

Masking data in the results of a database query

Номер: GB0002501281A
Автор: CLIFFORD AUSTIN [GB], MCKEOWN BRIAN [GB], JENKINS GARETH [GB], BARBAS PEDRO [GB], CLIFFORD AUSTIN, MCKEOWN BRIAN, JENKINS GARETH, BARBAS PEDRO, AUSTIN CLIFFORD, BRIAN MCKEOWN, GARETH JENKINS, PEDRO BARBAS
Принадлежит:

A database query is intercepted and masked data in the query is identified; the masked data in the query is unmasked 332 by substituting the masked data with equivalent real values; the unmasked query is sent to the database engine; a result 330 provided by the database in response to the unmasked query is intercepted; values in the result corresponding to sensitive information are identified; the sensitive values are substituted with a masked equivalent; and the masked result set is returned to the user. Each masked equivalent preferably uses a unique mask chosen from a non-repeating sequence.

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Номер записи: 3