公开(公告)号：US20240169072A1

公开(公告)日：2024-05-23

申请号：US17988975

申请日：2022-11-17

Applicant: SAP SE

Inventor： Beomsoo KIM ,  Yong Sik KWON ,  Ji Hoon JANG ,  Hyeong Seog KIM

IPC: G06F21/60 ,  G06F21/62

CPC classification number: G06F21/602 ,  G06F21/6218

Abstract: Systems and methods include determination of a first encryption key associated with a data page of a row store database table stored in a volatile memory, based on a header of the data page, encryption of a body of the data page using the first encryption key, and storage of an encrypted data page comprising the header and the encrypted body in a persistent storage system.

公开(公告)号：US20230185792A1

公开(公告)日：2023-06-15

申请号：US17548973

申请日：2021-12-13

Applicant: SAP SE

Inventor： Ji Hoon JANG ,  Juchang LEE ,  Changgyoo PARK ,  Myunggon PARK

IPC: G06F16/23 ,  G06F16/27

CPC classification number: G06F16/2365 ,  G06F16/273

Abstract: Systems and methods include reception of a workload statement, determination of whether the workload statement is a read statement or write statement, and, if the workload statement is a read statement, execution of the read statement to generate a first result set and transmission of the read statement for execution by a second database system to generate a second result set. If the workload statement is a write statement, the write statement is executed to change data of the first database system and the changed data is replicated to the second database system.

公开(公告)号：US20240195617A1

公开(公告)日：2024-06-13

申请号：US18065048

申请日：2022-12-13

Applicant: SAP SE

Inventor： Beomsoo KIM ,  Yong Sik KWON ,  Ji Hoon JANG ,  Hyeong Seog KIM

IPC: H04L9/08 ,  G06F21/60 ,  G06F21/62

CPC classification number: H04L9/0891 ,  G06F21/602 ,  G06F21/6218

Abstract: Systems and methods include storage of a plurality of encrypted data pages of a row store database table in a persistent storage system, determination of a first encryption key associated with one of the plurality of encrypted data pages based on a header of the one of the plurality of encrypted data pages, determination of whether the first encryption key has been revoked, and, if it is determined that the first encryption key has been revoked, adding of a portion of volatile memory allocated to the one of the plurality of data pages to a free list.

公开(公告)号：US20180150363A1

公开(公告)日：2018-05-31

申请号：US15362714

申请日：2016-11-28

Applicant: SAP SE

Inventor： Hyeong Seog KIM ,  Yong Sik KWON ,  Seyeong BAE ,  Ji Hoon JANG ,  Won Wook HONG

IPC: G06F11/14 ,  G06F17/30

CPC classification number: G06F11/1469 ,  G06F16/2308 ,  G06F16/2365 ,  G06F2201/84

Abstract: Restoring a database image of a secondary database system comprises initializing the database image from a recovery image that includes metadata logs and non-metadata logs, of which at least one metadata log includes an undo log of non-committed data that is applied to the initialized database image. A first pagelist and first indexes are then rebuilt based on first data segments of the database image and the corresponding metadata objects. The database image is then updated by replaying the metadata redo log generated from the undo log, the metadata logs, and the non-metadata logs. Then, a second pagelist and second indexes for the database system are rebuilt based on second data segments of the database image and the corresponding non-metadata objects, while each of the first data segments is statically separated from the second data segments in physical memory space. Related apparatus, systems, techniques and articles are also described.