A real-time database online expansion method, system, equipment and storage medium
A database and data table technology, applied in the direction of database design/maintenance, database update, database index, etc., can solve the problem of inability to dynamically expand the real-time database, and achieve the effect of dynamic expansion requirements.
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[0085] The following takes the expansion process of the alarm database in the distributed control system of a certain power plant as an example; wherein, before the expansion, the alarm database contains three data tables, and the IDs of the three data tables are respectively No. 1 data table and No. 2 data table. Data table No. 3 and data table No. 3; first expand the capacity of data table No. 2. The maximum number of tuples of No. 2 data before expansion is 1000, and the maximum number of tuples after expansion is 1500.
[0086] This embodiment provides a real-time database online expansion method, including the following steps:
[0087] Step 1, according to the format of original real-time database, set up blank data file; Among the present invention, blank data file comprises header, index area and data area; The preservation path of blank data file is identical with original real-time database, and the title of blank data file is "alarm database+exp.dat"; the format of t...
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