Database conversion from single monolithic file mode to one table per file and one file per table mode
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United States of America Patent
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Jun 25, 2019
Grant Date -
Jul 28, 2016
app pub date -
Jul 13, 2015
filing date -
Jan 28, 2015
priority date (Note) -
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Abstract
Methods, apparatus, and other embodiments facilitate transitioning a database between two modes. The two modes include a mode where table information for separate tables in the database is stored in a single monolithic file and a mode where the table information for separate tables is stored in separate files. Conventional attempts to make this type of transition lock the database for an unacceptable amount of time. Example methods and apparatus make a copy of a database that is to be transitioned, lock the copy, make a second instance of the copy, and then perform the work necessary for the transition in the second instance. This allows the original database to remain running. When the second instance is complete, the second instance is synchronized to the original database and then the transition is completed by copying the second instance to the original or failing the original over to the second instance.
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