Selective data mirroring for in-memory databases

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United States of America Patent

PATENT NO 10331572
APP PUB NO 20180260338A1
SERIAL NO

15979130

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Abstract

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Techniques are provided for maintaining data persistently in one format, but making that data available to a database server in more than one format. For example, one of the formats in which the data is made available for query processing is based on the on-disk format, while another of the formats in which the data is made available for query processing is independent of the on-disk format. Data that is in the format that is independent of the disk format may be maintained exclusively in volatile memory to reduce the overhead associated with keeping the data in sync with the on-disk format copies of the data. Selection of data to be maintained in the volatile memory may be based on various factors. Once selected the data may also be compressed to save space in the volatile memory. The compression level may depend on one or more factors that are evaluated for the selected data. The factors for the selection and compression level of data may be periodically evaluated, and based on the evaluation, the selected data may be removed from the volatile memory or its compression level changed accordingly.

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Patent Owner(s)

  • ORACLE INTERNATIONAL CORPORATION

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ganesh, Amit San Jose, US 159 5621
Krishnappa, Chinmayi San Mateo, US 7 73
Marwah, Vineet San Ramon, US 74 2366

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