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    SUPPORTING SCALABLE DISTRIBUTED SECONDARY INDEX USING REPLICATION ENGINE FOR HIGH-PERFORMANCE DISTRIBUTED DATABASE SYSTEMS
    1.
    发明申请
    SUPPORTING SCALABLE DISTRIBUTED SECONDARY INDEX USING REPLICATION ENGINE FOR HIGH-PERFORMANCE DISTRIBUTED DATABASE SYSTEMS 审中-公开

    公开(公告)号：US20200320051A1

    公开(公告)日：2020-10-08

    申请号：US16372644

    申请日：2019-04-02

    申请人： SAP SE

    发明人： Juchang Lee ,  Hyejeong Lee ,  Kyu Hwan Kim ,  Friedrich Keller ,  Mihnea Andrei

    IPC分类号： G06F16/22 ,  G06F16/27

    摘要： Implementations of the present disclosure include providing, at each node in a set of nodes of a database system, a table partition of a plurality of table partitions, the plurality of table partitions being provided by partitioning a table using a primary key, providing, at each node in the set of nodes of the database system, a secondary index partition of a plurality of secondary index partitions, each secondary index partition including a replicate table of at least a portion of the table, the plurality of secondary index partitions being provided by partitioning the table using one or more secondary keys, and for at least one operation executed on a table partition, executing a replication protocol to replicate the at least one operation on a secondary index partition that corresponds to the table partition.

    Validating query results during asynchronous database replication
    2.
    发明授权
    Validating query results during asynchronous database replication 有权

    公开(公告)号：US10545995B2

    公开(公告)日：2020-01-28

    申请号：US15601008

    申请日：2017-05-22

    申请人： SAP SE

    发明人： Juchang Lee ,  Chang Gyoo Park ,  Hyejeong Lee ,  Kyu Hwan Kim ,  Mihnea Andrei

    IPC分类号： G06F16/00 ,  G06F16/27 ,  G06F16/21 ,  G06F16/23 ,  G06F16/2455 ,  G06F11/36

    摘要： An oldest version timestamp is received from a first database. A current commit timestamp is received from a second database configured to asynchronously replicate the first database. The current global commit timestamp corresponds to a commit transaction executed in the first database and subsequently replicated in the second database. A first test query is then issued to the second database including a request for a current timestamp of the second database. A second test query is issued to the primary database requesting records associated with a target update version that has a target timestamp equal to the current snapshot timestamp. A determination is then made that a first return associated with the first test query and a second return associated with the second test query are identical indicating a successful validation. Related apparatus, systems, techniques and articles are also described.

    Supporting scalable distributed secondary index using replication engine for high-performance distributed database systems
    5.
    发明授权
    Supporting scalable distributed secondary index using replication engine for high-performance distributed database systems 有权

    公开(公告)号：US11347705B2

    公开(公告)日：2022-05-31

    申请号：US16372644

    申请日：2019-04-02

    申请人： SAP SE

    发明人： Juchang Lee ,  Hyejeong Lee ,  Kyu Hwan Kim ,  Friedrich Keller ,  Mihnea Andrei

    IPC分类号： G06F16/22 ,  G06F16/27

    摘要： Implementations of the present disclosure include providing, at each node in a set of nodes of a database system, a table partition of a plurality of table partitions, the plurality of table partitions being provided by partitioning a table using a primary key, providing, at each node in the set of nodes of the database system, a secondary index partition of a plurality of secondary index partitions, each secondary index partition including a replicate table of at least a portion of the table, the plurality of secondary index partitions being provided by partitioning the table using one or more secondary keys, and for at least one operation executed on a table partition, executing a replication protocol to replicate the at least one operation on a secondary index partition that corresponds to the table partition.

    Validating Query Results During Asynchronous Database Replication
    6.
    发明申请
    Validating Query Results During Asynchronous Database Replication 审中-公开

    公开(公告)号：US20180336258A1

    公开(公告)日：2018-11-22

    申请号：US15601008

    申请日：2017-05-22

    申请人： SAP SE

    发明人： Juchang Lee ,  Chang Gyoo Park ,  Hyejeong Lee ,  Kyu Hwan Kim ,  Mihnea Andrei

    IPC分类号： G06F17/30

    CPC分类号： G06F16/273 ,  G06F11/36 ,  G06F16/219 ,  G06F16/2358 ,  G06F16/2379 ,  G06F16/2455

    摘要： An oldest version timestamp is received from a first database. A current commit timestamp is received from a second database configured to asynchronously replicate the first database. The current global commit timestamp corresponds to a commit transaction executed in the first database and subsequently replicated in the second database. A first test query is then issued to the second database including a request for a current timestamp of the second database. A second test query is issued to the primary database requesting records associated with a target update version that has a target timestamp equal to the current snapshot timestamp. A determination is then made that a first return associated with the first test query and a second return associated with the second test query are identical indicating a successful validation. Related apparatus, systems, techniques and articles are also described.

    Multi-replica asynchronous table replication
    7.
    发明授权
    Multi-replica asynchronous table replication 有权

    公开(公告)号：US10095764B2

    公开(公告)日：2018-10-09

    申请号：US14871675

    申请日：2015-09-30

    申请人： SAP SE

    发明人： Chang Gyoo Park ,  Juchang Lee ,  Kyu Hwan Kim ,  Hyoung Jun Na ,  Hyejeong Lee

    IPC分类号： G06F17/30 ,  G06F11/14

    摘要： Technologies are described for performing replication within a database environment. Where a database transaction is replicated at multiple replica nodes, a replica node is selected as a coordinator replica node for the transaction. The other replica node or nodes are designated as follower replica nodes for the transaction. A follower replica node sends the coordinator replica node a precommit notification when the follower replica node has precommitted the transaction. The coordinator replica node sends the follower replica node a postcommit notification to commit the transaction when the transaction has been precommitted by all of the replica nodes to which the transaction is to be replicated.

    MULTI-REPLICA ASYNCHRONOUS TABLE REPLICATION
    8.
    发明申请
    MULTI-REPLICA ASYNCHRONOUS TABLE REPLICATION 审中-公开

    公开(公告)号：US20190005105A1

    公开(公告)日：2019-01-03

    申请号：US16122617

    申请日：2018-09-05

    申请人： SAP SE

    发明人： Chang Gyoo Park ,  Juchang Lee ,  Kyu Hwan Kim ,  Hyoung Jun Na ,  Hyejeong Lee

    IPC分类号： G06F17/30 ,  G06F11/14

    摘要： Technologies are described for performing replication within a database environment. Where a database transaction is replicated at multiple replica nodes, a replica node is selected as a coordinator replica node for the transaction. The other replica node or nodes are designated as follower replica nodes for the transaction. A follower replica node sends the coordinator replica node a precommit notification when the follower replica node has precommitted the transaction. The coordinator replica node sends the follower replica node a postcommit notification to commit the transaction when the transaction has been precommitted by all of the replica nodes to which the transaction is to be replicated.