Method and device for restoring memory database

Abstract

The embodiment of the invention discloses a memory database recovery method, which comprises the following steps that a memory database recovery instruction is received; whether a memory database real-time mirror image exists or not is judged; if the judging result shows that the memory database real-time mirror image exists, whether data which is not included in the memory database real-time mirror image is included in a database operation log or not is judged; if the data is included, the data which is not included in the memory database real-time mirror image but is included in the database operation log is loaded into the memory database real-time mirror image, in addition, the memory database real-time mirror image is loaded into a memory for recovering a memory database; if the data is not included, the memory database real-time mirror image is loaded into the memory for recovering the memory database. The embodiment of the invention also discloses memory database recovery equipment and a terminal. When the method, the equipment and the terminal provided by the embodiment of the invention are adopted, the memory database recovery efficiency can be improved, and the influence of the memory database recovery on the system performance is reduced.

Description

technical field [0001] The invention relates to the technical field of the Internet, in particular to a method and device for restoring a memory database. Background technique [0002] With the continuous development of the Internet, the requirements for data access speed are getting higher and higher, and memory databases are used more and more frequently because of their fast data access capabilities. [0003] An in-memory database refers to a database that stores data directly in memory. Compared with the disk, the data read and write speed of the memory is several orders of magnitude higher. Saving data in the memory can greatly improve the performance of the application than accessing it from the disk. However, since all operations are based on memory, in-memory databases are extremely prone to data damage or loss due to system problems, especially data loss due to downtime. [0004] In the prior art, the in-memory database is usually recovered according to the databa...

AI Technical Summary

Problems solved by technology

However, since all operations are based on memory, in-memory databases are extremely prone to data corruption or loss due to system problems, especially data loss due to downtime

[0004] In the prior art, the in-memory database is usually recovered according to the database operation log, that is, the operation (such as adding, deleting, modifying, etc.) that causes the data in the memory database to change and the log records of the result, that is, the recovery is completely based on the records in the database operation log In-memory database, but in this in-memory database recovery scheme, the in-memory database recovery efficiency is low, and when the amount of log data is relatively large, it will cause a large system load and affect system performance

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