公开(公告)号：US20190384775A1

公开(公告)日：2019-12-19

申请号：US16552833

申请日：2019-08-27

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jijun Wen ,  Bo Shang ,  Wei Wang

IPC: G06F16/27 ,  G06F16/23

Abstract: An active transaction list synchronization method and apparatus comprising a first node that records, in a transaction list incremental log buffer, a transaction list incremental log that is obtained after last active transaction list synchronization, where the transaction list incremental log indicates a change of a transaction recorded in an active transaction list of the first node and includes an added-transaction log and a committed-transaction log, wherein the added-transaction log indicates a transaction is added to the active transaction list, wherein the committed-transaction log indicates a transaction is deleted from the active transaction list. When performing group commit on transactions recorded in the committed-transaction log, the first node sends the transaction list incremental log to at least one second node.

公开(公告)号：US20180196703A1

公开(公告)日：2018-07-12

申请号：US15917166

申请日：2018-03-09

Applicant: Huawei Technologies Co., Ltd.

Inventor： Qiang Tong ,  Zongchao Liu ,  Bo Shang

IPC: G06F9/50 ,  G06F9/38 ,  G06F9/30 ,  G06F17/30

CPC classification number: G06F9/5077 ,  G06F9/3009 ,  G06F9/3851 ,  G06F9/4843 ,  G06F16/278 ,  G06F16/90335

Abstract: A parallel execution method and apparatus in a terminal database, where the method includes determining, by a terminal, each thread central processing unit (CPU) based on a preset degree of parallelism, where the degree of parallelism is a quantity of threads executed in parallel, obtaining, by the terminal, a frequency of each thread CPU, calculating a frequency proportion of the thread CPUs, dividing, by the terminal, a to-be-queried data table in the terminal database into data partitions based on the frequency proportion of the thread CPUs, determining a data partition corresponding to each thread CPU, and querying in parallel, by the terminal, data in the corresponding data partition using each thread CPU.

公开(公告)号：US11442961B2

公开(公告)日：2022-09-13

申请号：US16552833

申请日：2019-08-27

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jijun Wen ,  Bo Shang ,  Wei Wang

IPC: G06F16/27 ,  G06F16/23 ,  G06F11/14

Abstract: An active transaction list synchronization method and apparatus comprising a first node that records, in a transaction list incremental log buffer, a transaction list incremental log that is obtained after last active transaction list synchronization, where the transaction list incremental log indicates a change of a transaction recorded in an active transaction list of the first node and includes an added-transaction log and a committed-transaction log, wherein the added-transaction log indicates a transaction is added to the active transaction list, wherein the committed-transaction log indicates a transaction is deleted from the active transaction list. When performing group commit on transactions recorded in the committed-transaction log, the first node sends the transaction list incremental log to at least one second node.

公开(公告)号：US11132265B2

公开(公告)日：2021-09-28

申请号：US16448581

申请日：2019-06-21

Applicant: Huawei Technologies Co., Ltd.

Inventor： Guangwei Cheng ,  Bo Shang ,  Tian Qi

IPC: G06F11/14 ,  G06F16/27 ,  G06F16/00

Abstract: Embodiments of this application provide a method and an apparatus for multi-replica data restoration. The method is applied to a distributed database and includes: when a first page in replica data of a first node has a fault, obtain N latest LSNs in data log information of a second node that corresponds to a first page identifier. The first page is any page that is in the replica data of the first node and that has a fault. The first node further determines a node corresponding to a largest LSN in the N latest LSNs in the data log information of the second node that corresponds to the first page identifier is a third node. Then the first node performs data restoration on the first page in the replica data of the first node according to replica data of the third node.

公开(公告)号：US10884817B2

公开(公告)日：2021-01-05

申请号：US15917166

申请日：2018-03-09

Applicant: Huawei Technologies Co., Ltd.

Inventor： Qiang Tong ,  Zongchao Liu ,  Bo Shang

IPC: G06F9/46 ,  G06F9/50 ,  G06F16/27 ,  G06F16/903 ,  G06F9/30 ,  G06F9/38 ,  G06F9/48

Abstract: A parallel execution method and apparatus in a terminal database, where the method includes determining, by a terminal, each thread central processing unit (CPU) based on a preset degree of parallelism, where the degree of parallelism is a quantity of threads executed in parallel, obtaining, by the terminal, a frequency of each thread CPU, calculating a frequency proportion of the thread CPUs, dividing, by the terminal, a to-be-queried data table in the terminal database into data partitions based on the frequency proportion of the thread CPUs, determining a data partition corresponding to each thread CPU, and querying in parallel, by the terminal, data in the corresponding data partition using each thread CPU.