公开(公告)号：US20170300426A1

公开(公告)日：2017-10-19

申请号：US15637241

申请日：2017-06-29

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yunpeng CHAI ,  Dongwang SUN

IPC: G06F12/12 ,  G06F12/06 ,  G06F12/08

CPC classification number: G06F12/126 ,  G06F12/0246 ,  G06F12/06 ,  G06F12/0684 ,  G06F12/0804 ,  G06F12/0871

Abstract: 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 (S101); if both the first queue and the second queue are missed, selecting and deleting an eliminated data block from the first queue (S102); if the eliminated data block is in a stored state, inserting the eliminated data block into the second queue (S103); and determining a target data block in a lower-level storage medium, and inserting the target data block into the first queue, (S104). 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.

公开(公告)号：US20170371807A1

公开(公告)日：2017-12-28

申请号：US15699406

申请日：2017-09-08

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yunpeng CHAI ,  Dongwang SUN

IPC: G06F12/121 ,  G06F12/0891

CPC classification number: G06F12/121 ,  G06F12/0804 ,  G06F12/0866 ,  G06F12/0891 ,  G06F2212/1021 ,  G06F2212/60

Abstract: The present embodiments provide a cache data determining method and apparatus, and pertain to the field of computer technologies. The method includes: acquiring a data identifier of read cache miss data; selecting, based on the acquired data identifier, a data identifier of to-be-determined data; recording data identifiers by groups; collecting statistics on quantities of occurrence times, in each group, of the data identifiers; and selecting target to-be-determined data according to the quantities of occurrence times, and determining the target to-be-determined data as cache miss data to be written into a cache memory. Data identifiers are recorded by groups, and after statistics on quantities of occurrence times, in each group, of the data identifiers is collected, target to-be-determined data is selected according to the quantities of occurrence times, and the target to-be-determined data is determined as cache miss data to be written into a cache memory.

公开(公告)号：US20190324961A1

公开(公告)日：2019-10-24

申请号：US16455744

申请日：2019-06-28

Applicant: Huawei Technologies Co., Ltd.

Inventor： Dongwang SUN

IPC: G06F16/2453 ,  G06F16/22

Abstract: Embodiments of the present invention disclose a storage method and a query method for a database, and an apparatus, and relate to the field of computer technologies. A specific solution is: receiving a query request, where the query request is used to query data that is in a database and that meets a query condition; determining a data query range corresponding to the query condition, and determining a matched index item from multiple index items, where a value range indicated by an index key in the matched index item includes the data query range; and reading the data from a storage unit to which an index value in the matched index item points.

公开(公告)号：US20190057123A1

公开(公告)日：2019-02-21

申请号：US16169585

申请日：2018-10-24

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Guoqiang ZHANG ,  Lin HUANG ,  Dongwang SUN

IPC: G06F17/30

Abstract: 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.