4 results about "Multiple copy" patented technology

Embodiments of the present application provide a kind of storage, reading and archiving method, equipment, storage medium and program product of multiple copy data.In the embodiments of the present application, more than the number of storage nodes of copy is provided by fast fault-tolerant mechanism to store fault-tolerant, first write data in copy node, when the node of failure and within the fault-tolerant range, data is written to candidate node, it is beneficial to improve the success probability of multiple copy storage, without triggering the slow fault-tolerant mechanism of the above-mentioned trigger archiving data unit within the fault-tolerant range, reduce the probability of triggering the fault-tolerant mechanism, reduce the access impact to management node (such as MS), to improve the efficiency of data writing, reduce write delay.

The application discloses a data synchronization method and device. The method comprises the following steps: receiving a data object update request, wherein the data object update request carries a target data object identifier and update information; determining a target data object in a database according to the target data object identifier, and updating content information and version information of the target data object based on the update information; generating a change operation message for indicating the target data object based on the update information and the updated version information; sending the change operation message to a corresponding service instance, so that the corresponding service instance stores the change operation message in a change operation queue, and synchronizes a local copy based on the change operation queue. Thus, more real-time and effective synchronization of multiple copies can be realized, and consistency between the local copy and data objects in the database can be better ensured.

The application provides a file management method based on a soft core on-board high-speed solid storage, which comprises the following steps: dividing a solid storage logical space into a metadata fixed block area and a data block area, dividing the data block area according to a fixed block size and managing the data block area according to a block number; establishing a super block, a directory table, a file table, a free block linked list and a file block number sequence of each file in a memory; serializing the above structure to generate a metadata mirror, writing the metadata mirror into the metadata fixed block area and saving multiple redundant copies; when power is restored, reading the multiple copies to make a consistency judgment, selecting an effective mirror to analyze and rebuilding a memory index structure. Through integrated storage of metadata and data, the application avoids the life and reliability risks caused by storing metadata in an independent and vulnerable medium in a traditional scheme; a multiple-copy redundancy and consistency judgment mechanism is adopted to realize quick recovery after power failure; through a rebuilding mechanism of the memory index, the consistency of a file system state and physical data is ensured, and the reliability of an on-board storage system is improved.

One or more embodiments of the specification provide a multi-copy data storage method, device, equipment and medium. The method comprises: obtaining a pre-set copy deployment mode in a target data table in a database; in the case where the copy deployment mode is not set, obtaining a copy deployment mode indicated by a configuration file of the database; setting storage formats of multiple nodes according to the copy deployment mode; and storing data in the target data table in the nodes according to the storage formats of the nodes. By setting the row storage and column storage nodes in the same set of database architectures, different requirements for the storage formats under different query load scenarios can be met, and compared with setting the row storage and column storage in different databases, the maintenance of the database can be realized by using a set of software systems, and the nodes with different storage formats do not need to rely on data synchronization tools outside the database, which is easy to monitor and maintain.