2results about How to "Reduce creation time" patented technology

Embodiments of the present specification provide a database branch processing method and device, wherein the database branch processing method comprises: in response to a branch creation request for a target database, writing a first memory data page in a shared buffer pool to a disk, setting an inventory data page in the disk to a read-only state, and obtaining a baseline data source for representing a database state before branch creation; determining a first branch identifier of a first database branch to be created, establishing an association relationship between the first branch identifier and the baseline data source, and creating the first database branch; creating a first incremental file corresponding to the first branch identifier, the first incremental file being used to store a first incremental data page, the first incremental data page being a data page that has changed under the first database branch; and processing a database task under the first database branch based on the baseline data source and the first incremental file. In this way, the creation overhead of the database branch is reduced, and the branch processing efficiency is improved.

The application provides a smart card file storage structure, which can improve the writing efficiency of large-size files on the basis of realizing the power-off protection function of smart card file data, thereby improving the production efficiency of smart cards, and can also realize wear leveling in the overall storage area range. The file data is updated by alternately updating the directory information block; the file is created and updated by randomly selecting available sectors to write the file and then registering the sector number of the written file in the directory information block, and only one or two writing operations are required to realize the creation and update of the file; when a long file is created, only the file item FILE_ITM of the long file needs to be constructed in the directory information block, and the actual storage space of the long file does not need to be allocated in the file data area, and the available sectors are applied for the long file in the subsequent update operation. Meanwhile, the application also discloses a smart card file management method.