公开(公告)号：US20220066886A1

公开(公告)日：2022-03-03

申请号：US17525415

申请日：2021-11-12

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Chuanting WANG ,  Zhongchu ZHU ,  Yuhui XING

IPC: G06F11/14 ,  G06F16/21

Abstract: The present disclosure relates to fault repair methods for a database system. In one example method, when working normally, a master node backs up, to a global buffer pool (GBP) node by using a data transmission protocol with a low latency and a high throughput (for example, a remote direct memory access (RDMA) protocol), a modified page generated because of transaction modification. When the master node is faulty, a standby node does not need to replay all remaining replay logs that are not replayed, but only needs to replay redo logs corresponding to a page that does not exist on the GBP node and pages that are not sequentially arranged and obtain the pages.

公开(公告)号：US20180262590A1

公开(公告)日：2018-09-13

申请号：US15979951

申请日：2018-05-15

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Lin HUANG ,  Chuanting WANG

IPC: H04L29/08 ,  G06F17/30 ,  H03M7/30

CPC classification number: H04L67/2828 ,  G06F16/00 ,  G06F16/245 ,  G06F16/27 ,  H03M7/30 ,  H03M7/46 ,  H03M7/607 ,  H03M7/6088

Abstract: Embodiments of the present invention relate to the database field, and in particular, to a data transmission method and apparatus, so as to reduce overheads for data transmission between nodes in a distributed database and lighten network load. In the embodiments of the present invention, a DN determines a column that has a distribution rule of parameters in the column; the DN determines, according to a data type of the parameters of the column and the distribution rule of the parameters in the column, a compression algorithm corresponding to the column; the DN compresses the column using the compression algorithm; and the DN sends a compressed column to a target node. In this way, the overheads for the data transmission between the nodes are reduced, and the network load is lightened.