公开(公告)号：US20180150499A1

公开(公告)日：2018-05-31

申请号：US15362712

申请日：2016-11-28

Applicant: SAP SE

Inventor： Joo Yeon LEE ,  Eunsang KIM ,  Myung Sun PARK ,  Sunghoon LEE ,  Hanggjun CHO

IPC: G06F17/30 ,  G06F11/14

CPC classification number: G06F16/2358 ,  G06F11/1471 ,  G06F11/2038 ,  G06F11/2048 ,  G06F11/2097 ,  G06F2201/80

Abstract: Systems and methods for generating a metadata log in a database recovery system include generating, at its primary system, a metadata log for a logging period. A change applied to a metadata object accessible from the primary system is detected, and upon detection, the system identifies a pair of a unique metadata identifier and a metadata type for the changed metadata object and determines a metadata structure of the changed metadata object. A data exchange object for the metadata structure is generated and a data exchange element from the data exchange object is created. The metadata log is updated with log information that includes the data exchange element and the pair, which is associated with the data exchange element. Upon the logging period ending, the metadata log is transmitted to a secondary system of the database recovery system for replaying. Related apparatus, systems, techniques and articles are also described.

公开(公告)号：US20230409731A1

公开(公告)日：2023-12-21

申请号：US17968136

申请日：2022-10-18

Applicant: SAP SE

Inventor： Patrick VOELKER ,  Holger MACK ,  Meinolf BLOCK ,  Thorsten GLEBE ,  Mihnea ANDREI ,  Yong Sik KWON ,  Dirk THOMSEN ,  Martin SCHINDEWOLF ,  Martin KITTEL ,  Myung Sun PARK ,  Beomsoo KIM ,  Martin HEIDEL ,  Christian BENSBERG ,  Fabian GARAGNON ,  Michael MUEHLE ,  Sergej HARDOCK ,  Johannes BEIGEL ,  Sascha ZORN ,  Christoph HOHNER ,  Andreas HARTEL

IPC: G06F21/62 ,  H04L9/08

CPC classification number: G06F21/6227 ,  H04L9/0825 ,  H04L9/0822 ,  H04L9/0891

Abstract: A database system includes a persistent storage system, a memory storing metadata defining a tenant object and a plurality of database artifacts, a first instance of the tenant object, the first instance associated with a first plurality of the database artifacts including first data associated with the first instance of the tenant object, and a second instance of the tenant object, the second instance associated with a second plurality of the database artifacts including second data associated with the second instance of the tenant object. A processing unit is to execute program code of a database instance to cause the database system to encrypt the first data associated with the first instance of the tenant object using a first public encryption key and store the encrypted first data in the persistent storage system, and encrypt the second data associated with the second instance of the tenant object using a second public encryption key and store the encrypted second data in the persistent storage system.