Tmaxtibero Co., Ltd.

Sangyoung Park

Dongyun Yang

Jaemin Oh

Hakju Kim

Joohyun Lee

Kunwoo Park

Jeonghyuk Park

Sehyeon Oh

Seunghwan Yoo

Geonhyoung Joe

Sangchul Kim

Seunghoon Park

Sangmin Kang

Yonghwa Kim

Kwangwon Park

Taeseop Kim

Seonggyu Choi

Yongkwon Kim

Disclosed is a method for implementing re-instantiation for a database, which is performed by a computing device, which may include: acquiring at least one redo log; acquiring an address of a data block based on the at least one redo log; acquiring information on changed matters included in a control file based on the at least one redo log; and modifying a first database based on the address of the data block and the information on the changed matters.

Method for implementing re-instantiation for database

Disclosed is a method for managing a database, which is performed by a first database server including at least one processor constituting a cluster jointly with at least one second database server. The method for managing a database may include loading, on a buffer cache, a first data block based on a first transaction for modifying the first data block located in a sharing storage shared jointly with the at least one second database server. The method may include modifying the first data block loaded on the buffer cache. The method may include determining flushing a first log generated by the modification of the first data block to the sharing storage.

Method for managing database

Disclosed are methods for updating data for multiple users in a database management system performed by a computing device, comprising: determining whether there is an already modified target row during a modification task for at least one target row; generating at least one reselected target row by reselecting a modification target in the at least one target row when there is the already modified target row; determining whether there is an already modified reselected target row during a modification task for the at least one reselected target row; and omitting the modification task for the at least one reselected target row, performing the modification task for the at least one reselected target row, or performing a rollback for the modification task for the at least one reselected target row according to the type of instruction statement included in the modification query when there is the already modified reselected target row.

Method and apparatus for updating data about multiple user in database management system

A method for managing a virtual database example includes acquiring a first query related to a first object of a first virtual database, issuing an ownership of the first object through a first master front end node corresponding to the first virtual database, and altering first meta information of the first object according to the first query, through a first process which acquires the ownership of the first object. The method also includes requesting an invalidation of a first data dictionary cache about the first meta information of the first object through the first master front end node, receiving a first completion signal indicating that the invalidation of the first data dictionary cache is completed, performing first commit for an alteration of the first meta information of the first object, and collecting the issued ownership of the first object.

Apparatus and method for managing virtual database

Disclosed is a method including setting an exclusive modification authority of a first instance for a first data block (FDB) corresponding to a first transaction of the first instance. The FDB is related to a first index node group which participates in an index structure change which occurs by the first transaction. The method includes verifying the exclusive modification authority of a second data block (SDB) corresponding to a second transaction of a second instance. The SDB is related to a second index node group which participates in the index structure change which occurs by the second transaction. When the exclusive modification authority of the first instance for at least a part of the SDB is identified, the method includes making an access of the second transaction of modifying a data block in which the exclusive modification authority of the first instance is set in the SDB be waited.

Method and device for managing the index performed in active-active database cluster environment

Disclosed is a method for processing a query related to a plurality of partitions included in a plurality of tables having different partition information, which is performed by a computing device including one or more processors. The method includes acquiring the plurality of partitions for processing the query. The method includes acquiring global partition indexes for encompassing the acquired partitions and acquiring local partition indexes corresponding to the acquired partitions, respectively. The method includes processing the query at least partially based on the global partition indexes and the local partition indexes.

Method for querying tables with different partition information

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Seoul, South Korea

Sangyoung Park