公开(公告)号：WO2023033719A2

公开(公告)日：2023-03-09

申请号：PCT/SG2022/050540

申请日：2022-07-29

Applicant: LEMON INC.

Inventor： CHEN, Jianjun ,  DING, Yonghua ,  LIU, Ye ,  LI, Fangshi ,  CAO, Lixun ,  LIU, Yang ,  ZHANG, Li ,  ZHANG, Mingyi ,  ZHANG, Lei ,  SHI, Rui

IPC: G06F16/27 ,  G06F16/28 ,  G06F16/22 ,  G06F16/901 ,  G06F16/23 ,  G06F16/2433 ,  G06F16/24575 ,  G06F16/258 ,  G06F16/278 ,  G06F16/283

Abstract: The present disclosure describes hybrid transactional and analytical processing (HTAP) techniques. A HTAP system comprises a first processing engine configured to perform online transactional processing, a second processing engine configured to perform online analytical processing, and a storage in communication with the first processing engine and the second processing engine. The first processing engine, the second processing engine, and the storage may be modularized and configured to be decoupled from each other. The system may be configured to capture data by the first processing engine in real time, organize the data in a first format in a first part of the storage for use by the first processing engine, propagate the data to a second part of the storage subsystem, and organize the data in a second format in the second part of the storage for use by the second processing engine.

公开(公告)号：WO2023033721A2

公开(公告)日：2023-03-09

申请号：PCT/SG2022/050550

申请日：2022-08-02

Applicant: LEMON INC.

Inventor： CHEN, Jianjun ,  DING, Yonghua ,  LIU, Ye ,  LI, Fangshi ,  ZHANG, Li ,  ZHANG, Mingyi ,  WEI, Kui ,  DING, Wei ,  WU, Kai ,  SUN, Jason Yang

IPC: G06F16/27 ,  G06F16/21

Abstract: The present disclosure describes storage techniques for hybrid transactional and analytical processing. Data captured by a first processing engine may be received. The first processing engine may be configured to perform online transactional processing). Multiple replicas of logical logs generated based on the data may be distributed to a Delta Store by applying a quorum protocol on the multiple replicas. Data in the Delta Store are stored in a row format and are visible to a query for online analytical processing performed by a second processing engine. Data may be flushed from the Delta Store to a Base Store based on one or more predetermined rules. Data in the Base Store are stored in a columnar format and may be accessible by the second processing engine.

公开(公告)号：WO2023033720A2

公开(公告)日：2023-03-09

申请号：PCT/SG2022/050549

申请日：2022-08-02

Applicant: LEMON INC.

Inventor： CHEN, Jianjun ,  DING, Yonghua ,  LIU, Ye ,  LI, Fangshi ,  CAO, Lixun ,  LIU, Yang ,  ZHANG, Li ,  ZHANG, Mingyi ,  MENG, Xiangrui ,  ZHAO, Junda ,  ZHANG, Lei ,  SHI, Rui

IPC: G06F16/23 ,  G06F16/27 ,  G06F16/28 ,  G06F16/22 ,  G06F16/901 ,  G06F16/2358 ,  G06F16/2365 ,  G06F16/278 ,  G06F16/283

Abstract: The present disclosure describes techniques of providing data consistency for hybrid transactional and analytical processing. Logical logs and log serial numbers (LSNs) associated with the logical logs may be generated based on data captured by a first processing engine. The logical logs and the LSNs may be propagated to a storage subsystem configured to be in communication with the first processing engine and a second processing engine. The LSNs and information indicative of LSN schema versions may be stored and distributed by a metadata service. The first processing engine, the second processing engine, the storage subsystem and the metadata service are modularized, and support a LSN mechanism for maintaining data consistency.