Method and device for restoring data in embedded database

Abstract

The invention discloses a method and device for restoring data in an embedded database. The method comprises the following steps: judging whether the data files and the data file structures in a master database and a backup database are wrong; updating the data files in the master database into the data files in the backup database when the data files and / or the data file structures in the master database are wrong while the data files and the data file structures in the backup database are correct; and updating the data files in the backup database into the data files in the master database when the data files and the data file structures in the master database are correct while the data files and / or the data file structures in the backup database are wrong. The method and device provided by the invention restore the data in the embedded database with wrong data files and / or data file structures, thus saving the storage resources in the embedded system and improving the fault tolerance of the databases in the embedded system.

Description

technical field [0001] The invention relates to the technical field of embedded systems, in particular to a method and device for restoring data in an embedded database. Background technique [0002] In embedded systems, such as in large-capacity communication transmission equipment, the single-board software often needs to manage the data in the embedded system through the data management module during the operation process. The data management module generally uses Embedded databases, or file table structures similar to databases are managed. In order to ensure that the embedded system data is stable and persistent, these data tables need to be stored on physical storage media. With the rapid development of embedded technology, users have higher and higher requirements for data stability. However, when the single-board software encounters power failure or program abnormal reset during operation, data may be abnormal or lost. , so it is necessary to back up the data so tha...

AI Technical Summary

Problems solved by technology

With the rapid development of embedded technology, users have higher and higher requirements for data stability. However, when the single board software encounters power failure or program abnormal reset during operation, data may be abnormal or lost. , so the data needs to be backed up for data recovery when the data is abnormal or lost

[0003] In the prior art, for data recovery in embedded systems, some of them distinguish whether the data content is consistent by comparing the check code generated by the current database with the check code of the storage area. If they are not consistent, data recovery is performed. The method can only prevent data loss, but the corresponding data cannot be recovered due to damage to the data file and the data file structure itself.

At the same time, two check code storage spaces are also set in the existing data recovery device, which increases the physical storage resource burden of the embedded system.

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