Huawei Technologies Co., Limited

Tencent Technology (Shenzhen) Company Limited

Zhongqing Xu

Yuhong Liu

Hongbo Jin

Huijun Liu

Bingfu Wang

Jijun Wen

Changcheng Wen

Yuesen Li

Junnan Gao

Sen Hu

The present disclosure is related to a method and an apparatus for data migration in a database cluster. The method includes obtaining a snapshot of a source data node and recording incremental data in a to-be-migrated data shard in the source data node according to inventory data. The method includes migrating the inventory data to a target data node. The method also includes migrating the incremental data, and during the migration when the unmigrated incremental data satisfies a preset write-lock condition, instructing the source data node to perform a write-lock operation on the to-be-migrated data shard and migrate unmigrated incremental data to the target data node. The method further includes, after the migration of the incremental data is completed, instructing a coordinator node to switch a route corresponding to the to-be-migrated data shard from the source data node to the target data node.

Method, apparatus, and storage medium for migrating data node in database cluster

A data scanning method and apparatus are provided. The method includes analyzing a data scanning condition carried in a received data scanning request and determining at least one target data partition used to store data, acquiring a scanning cost of the target data partition, where the scanning cost includes waiting time of data scanning, allocating the target data partition to a processing resource according to the scanning cost so as to execute parallel data scanning, and acquiring a scanning result returned by the processing resource. In the present invention, statistics information of a data partition is collected, a scanning cost is acquired, and a target-data-partition operation group is appropriately allocated to a processing resource, thereby shortening waiting time of the whole data scanning.

Data scanning method and apparatus

A database management method and system. The method includes dividing, by a database system, a data partition into a physical partition layer and a logical partition layer, wherein the logical partition segment and the physical partition segment are mapped to each other using a mapping relationship; receiving, by the database system, a data operation instruction of a user, and determining a logical partition segment to which a data record that is requested for operation by the data operation instruction belongs; determining, according to the data operation instruction and the mapping relationship, a physical partition segment that is corresponding to the determined logical partition segment and at the physical partition layer to perform an operation on the data record that is requested for operation by the data operation instruction.

Database management method and system

A method, a device, and a system for remotely acquiring user physiological detection data are provided according to embodiments of the present invention. The method includes: receiving detection related information sent by handheld equipment, in which the detection related information includes user identity (ID) information and equipment positioning information; sending a detection start instruction to corresponding medical detection equipment according to the equipment positioning information; receiving user physiological detection data sent by the medical detection equipment, in which the user physiological detection data is associated with an equipment ID of the medical detection equipment; and binding and sending the user physiological detection data and the associated user ID information according to associative information of the user ID information and the equipment ID of the medical detection equipment.

Method, device, and system for remotely acquiring user physiological detection data

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Shenzhen, China

Zhongqing Xu