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    Logless atomic data movement
    41.
    发明授权
    Logless atomic data movement 有权

    公开(公告)号：US10853351B2

    公开(公告)日：2020-12-01

    申请号：US15457945

    申请日：2017-03-13

    Applicant: SAP SE

    Inventor： Franz Faerber ,  Juchang Lee ,  Ivan Schreter

    IPC: G06F7/00 ,  G06F17/00 ,  G06F16/23 ,  G06F16/27 ,  G06F16/28 ,  G06F16/16 ,  G06F16/22 ,  G06F16/174 ,  G06F3/06

    Abstract: A system and method of logless atomic data movement. An internal transaction is started within a multi-level storage architecture, the internal transaction to merge data from the first level storage structure to the second level storage structure. Committed data is read from a first level storage structure of the multi-level storage architecture as specified by the internal transaction. The committed data from the first level storage structure is inserted into a second level storage structure in a bulk insertion process, and the committed data is marked as being deleted from the first level storage. The internal transaction is then committed to the multi-level storage architecture when the committed data has been inserted into the second level storage structure.

    DATABASE WORKLOAD CAPTURE AND REPLAY
    42.
    发明申请
    DATABASE WORKLOAD CAPTURE AND REPLAY 审中-公开

    公开(公告)号：US20200183929A1

    公开(公告)日：2020-06-11

    申请号：US16715882

    申请日：2019-12-16

    Applicant: SAP SE

    Inventor： Chul Won Lee ,  Juchang Lee ,  Myunggon Park ,  Wonyoung Kwak ,  Jeong Hee Won ,  Ki Hong Kim ,  Kyu Hwan Kim ,  Beomsoo Kim

    IPC: G06F16/2453 ,  G06F16/21 ,  G06F16/17 ,  G06F16/13 ,  G06F16/11

    Abstract: 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.

    Workload capture and replay for replicated database systems
    44.
    发明授权
    Workload capture and replay for replicated database systems 有权

    公开(公告)号：US10592528B2

    公开(公告)日：2020-03-17

    申请号：US15442838

    申请日：2017-02-27

    Applicant: SAP SE

    Inventor： Chul Won Lee ,  Juchang Lee ,  Hyogi Jung

    IPC: G06F16/27 ,  G06F16/23 ,  G06F11/34 ,  G06F11/14 ,  G06F11/20

    Abstract: A computer implemented method is provided for capturing and replaying a database workload by obtaining a workload capture file comprising execution context information generated in a database system and replayable to replicate the workload, generating a modified workload capture file by generating modified execution context information, replaying the modified workload capture file by generating at least one read statement based on the modified workload execution information and issuing at least one read statement to a primary database system having an associated secondary database system, determining that the at least one read statement may be routed to the secondary database system for execution, and routing the read statement to the secondary database system for execution. Related apparatus, systems, techniques and articles are also described.

    Delayed snapshot isolation for read service at a database
    45.
    发明授权
    Delayed snapshot isolation for read service at a database 有权

    公开(公告)号：US10452636B2

    公开(公告)日：2019-10-22

    申请号：US15361760

    申请日：2016-11-28

    Applicant: SAP SE

    Inventor： Kyu Hwan Kim ,  Juchang Lee ,  Beomsoo Kim ,  Chang Gyoo Park ,  Reiner Singer ,  Christoph Rottering ,  Werner Thesing ,  Michael Muehle

    IPC: G06F16/00 ,  G06F16/23 ,  G06F16/245 ,  G06F16/27

    Abstract: 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.

    Hybrid database concurrent transaction control
    46.
    发明授权
    Hybrid database concurrent transaction control 有权

    公开(公告)号：US10402285B2

    公开(公告)日：2019-09-03

    申请号：US15260943

    申请日：2016-09-09

    Applicant: SAP SE

    Inventor： Juchang Lee ,  Chang Gyoo Park

    IPC: G06F17/00 ,  G06F11/14 ,  G06F16/11 ,  G06F16/23

    Abstract: A plurality of database modification statements are received as part of a database transaction that implicates data stored within a database. Thereafter, lock requests are initiated that requesting the database to lock the implicated data. At least one database operation by at least one of the database modification statements is then executed prior to receiving responses from at least a portion of the lock requests. After confirming that prior lock requests made by the transaction are successfully processed, a commit to make changes to the corresponding implicated data permanent is initiated. The implicated data can then be caused to be unlocked after the commit completes. Related apparatus, systems, techniques and articles are also described.

    DISTRIBUTED DATABASE TRANSACTION PROTOCOL
    48.
    发明申请
    DISTRIBUTED DATABASE TRANSACTION PROTOCOL 审中-公开

    公开(公告)号：US20190213203A1

    公开(公告)日：2019-07-11

    申请号：US16351001

    申请日：2019-03-12

    Applicant: SAP SE

    Inventor： Juchang Lee ,  Chang Gyoo Park ,  Kyu Hwan Kim ,  Deok Koo Kim

    IPC: G06F16/27 ,  G06F16/23

    CPC classification number: G06F16/273 ,  G06F16/2379

    Abstract: Technologies are described for facilitating transaction processing within a database environment having a coordinator node, a first worker node, and at least a second worker node. The first worker node sends a request from to the coordinator node for at least a first synchronization token maintained by the coordinator node. The first worker node receives the at least a first synchronization token from the coordinator node. The first worker node assigns the at least a first synchronization token to a snapshot as a snapshot ID value. The snapshot is executed at the first worker node. The first worker node forwards the snapshot ID value to the at least a second worker node.

    CLIENT-DRIVEN COMMIT OF DISTRIBUTED WRITE TRANSACTIONS IN A DATABASE ENVIRONMENT
    50.
    发明申请
    CLIENT-DRIVEN COMMIT OF DISTRIBUTED WRITE TRANSACTIONS IN A DATABASE ENVIRONMENT 审中-公开

    公开(公告)号：US20180349430A1

    公开(公告)日：2018-12-06

    申请号：US15611156

    申请日：2017-06-01

    Applicant: SAP SE

    Inventor： Juchang Lee ,  Deok Koo Kim ,  Chang Gyoo Park ,  Nosub Sung

    IPC: G06F17/30

    Abstract: Technologies are described for facilitating transaction processing in a distributed database environment. A database client sends database operations to a slave node, which mediates execution of the transaction. A connection between the database client and the slave node is associated with an identifier, and the transaction has an identifier. The database client sends a commit request to a master node over a network connection between the master node and the database client. The commit request includes the transaction identifier. The commit request can also include an indication of database nodes executing operations in the transaction.

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