Sap Se

Hyundai Motor Company

Lg Electronics Inc.

Beomsoo Kim

Juchang Lee

Kyu Hwan Kim

Yong Sik Kwon

Werner Thesing

Ki Hong Kim

Michael Muehle

Chul Won Lee

Christoph Roterring

Myunggon Park

Jeong Hee Won

Wonyoung Kwak

Chang Gyoo Park

Reiner Singer

Hyeong Seog Kim

Seyeong Bae

Deok Hoe Kim

Mihnea Andrei

Christian Bensberg

Dirk Thomsen

Joo Yeon Lee

Sang Kyun Cha

Thorsten Glebe

Jie Seol

Meinolf Block

Martin Heidel

Jaeyun Noh

Sascha Zorn

Myung Sun Park

Martin Schindewolf

Ji Hoon Jang

Hyungjin Choi

Bongjeong Jeon

Patrick Voelker

Christoph Hohner

Johannes Beigel

Martin Kittel

Holger Mack

Yongmun Gong

Marcel Birn

Fabian Garagnon

Sergej Hardock

Changseob Lee

Andreas Hartel

Youngho Yoo

Yoonseok Jeong

Christoph Rottering

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.

Native multi-tenant row table encryption

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.

Native multi-tenant encryption for database system

Technologies are described for facilitating data workload capture, workload replay, and comparing the performance of a plurality of database systems. A plurality of requests for database operations are received from one or more database clients. The requests for database operations are executed. For the plurality of requests for database operations, execution context information is generated for a plurality of execution contexts. For the plurality of requests for database operations, a plurality of performance measures are generated. The execution context information and the performance measures are stored in a workload capture store, such as a file. The workload capture file is useable to replay the captured workload at a second database system using at least a portion of the execution context information and at least a portion of the performance measures.

Database workload capture and replay

A computer implemented method is provided for determining a delay between a first database and an associated replicated database by replicating transactions of the first database in the replicated database, determining a delay between the two databases based on a commit timestamp from the first database and a timestamp associated with the commit transaction becoming visible in the replicated database. Then, after a predefined period of time has elapsed since replicating the commit transaction, determining a second delay based on a timestamp associated with a heartbeat log and a replicated database system time. And, selectively determining to execute or deny a statement received by the replicated database based on the second delay. Related apparatus, systems, techniques and articles are also described.

Measuring snapshot delay between source database and its asynchronous replica

A computer implemented method is provided comprising receiving a group of transaction logs from a first database, allocating transaction logs from the group of transaction logs to a first queue and to a second queue, generating an end-of-group transaction log indicative of an end of the group of transaction logs, allocating the end-of-group log to the first queue and the second queue; replaying transaction logs from the first queue including the end-of-group transaction log allocated to the first queue, replaying transaction logs from the second queue including the end-of-group transaction log allocated to the second queue; and changing visibility of one or more transactions in response to replaying the end-of-group transaction log allocated to the first queue and the end-of-group transaction log allocated to the second queue. Related apparatus, systems, techniques and articles are also described.

Delayed snapshot isolation for read service at a database

A system includes initiation of recovery from a crash of a database instance and, during the recovery, identification of a subset of pages of a memory image of the database instance which are not reusable and replacement of the identified subset of pages with corresponding pages of the savepoint image.

Database recovery using shared memory

A mobile terminal according to one embodiment of the present disclosure includes a display unit configured to display a home screen including a background screen and an item screen superimposed on the background screen, and a controller configured to, when a clean view entry request is received, remove the item screen and reproduce an omni-directional moving image set as an image of the background screen in response to the received clean view entry request.

Mobile terminal, and method for operating same

Measuring snapshot delay between source database system and its asynchronous replica

A computer implemented method is provided. The method comprises initializing a first database image of a first database system based on a recovery image comprising committed transactions, visible uncommitted transactions, and undo logs associated with the visible uncommitted transactions, undoing the visible uncommitted transactions using the undo logs, generating redo logs from the undo logs, replaying the redo logs to create invisible uncommitted transactions, and after replaying the redo logs, replaying transaction logs received from a second database system. Related apparatus, systems, techniques and articles are also described.

Version space reconstruction during database initialization

A shift control apparatus of an automatic transmission may include a data detector configured to detect driving data to perform a shift control, and a vehicle controller configured to determine a shift gear stage based on the driving data and control a transmission based on the shift gear stage, in which the vehicle controller sets driver's demand acceleration based on the driving data, sets a gear stage range which arrives at the driver's demand acceleration, and sets a target gear stage, at which fuel consumption is minimized, in the gear stage range to instruct a shift.

Shift control apparatus and shift control method of automatic transmission

For each data change occurring transaction created as part of a write operation initiated for one or more tables in a main-memory-based DBMS, a transaction log entry can be written to a private log buffer corresponding to the transaction. All transaction log entries in the private log buffer can be flushed to a global log buffer upon completion of the transaction to which the private log buffer corresponds.

Transaction private log buffering for high performance of transaction processing

A control method of a power delivery system of a vehicle, may include determining a theoretical target slip velocity of a torque converter for slipping a damper clutch, detecting a real slip velocity of the damper clutch in a real driving condition based on the theoretical target slip velocity, expressing distributions of the real slip velocity according to an engine load ratio into a control line diagram, and controlling the real target slip velocity of the damper clutch according to the control line diagram by using the engine load ratio.

Controlling method of power delivery system of vehicle

Growing community of inventors

Seoul, South Korea

Beomsoo Kim