Huawei Technologies Co., Limited

Dongwang Sun

Lin Huang

Guoqiang Zhang

Jijun Wen

Chuanting Wang

Yunpeng Chai

The present disclosure relates to example table connection methods, devices, and systems. In one example method, data that is sent by a coordinator node and that is in a first target column in a first data table is stored by a data node in a local memory. The data node receives a table connection request. When first data in the first target column is the same as second data in a second target column, the data node connects data in a row in which the first data is located to data in a row in which the second data is located. The data node sends a connection result to the coordinator node.

Table connection method in distributed database system and distributed database system

A read cache management method and apparatus based on a solid state drive, and the method includes: determining whether a read request hits a first queue and a second queue (S); if both the first queue and the second queue are missed, selecting and deleting an eliminated data block from the first queue (S); if the eliminated data block is in a stored state, inserting the eliminated data block into the second queue (S); and determining a target data block in a lower-level storage medium, and inserting the target data block into the first queue, (S). According to the foregoing read cache management method and apparatus based on the solid state drive, a hit ratio of the solid state drive can be increased, a data write count of the solid state drive can be reduced, and service life of the solid state drive can be extended.

Read cache management method and apparatus based on solid state drive

A data processing method and apparatus, which relate to the computer field and are capable of effectively improving scalability of a database system. The data processing method includes: receiving source code of an external routine, where the source code of the external routine is compiled by using an advanced programming language; compiling the source code to obtain intermediate code, where the intermediate code is a byte stream identifiable to a virtual machine on any operating platform; converting, according to an instruction set on the operating platform, the intermediate code into machine code capable of running on the operating platform; and storing the machine code to a database. The data processing method and apparatus provided by the embodiments of the present invention are used to process data.

Growing community of inventors

Beijing, China

Dongwang Sun