Inventor

MOHAN CHANDRASEKARAN

US65 patents

Patents

50 patents

US6453325B1Sep 17, 2002

Method and means for backup and restoration of a database system linked to a system for filing data

IBM317 citations99

US5960194ASep 28, 1999

Method for generating a multi-tiered index for partitioned data

IBM357 citations99

US5551046AAug 27, 1996

Method for non-hierarchical lock management in a multi-system shared data environment

IBM209 citations99

US5537574AJul 16, 1996

Sysplex shared data coherency method

IBM253 citations99

US5493668AFeb 20, 1996

Multiple processor system having software for selecting shared cache entries of an associated castout class for transfer to a DASD with one I/O operation

IBM187 citations99

US5455946AOct 3, 1995

Method and means for archiving modifiable pages in a log based transaction management system

IBM162 citations99

US5327556AJul 5, 1994

Fast intersystem page transfer in a data sharing environment with record locking

IBM238 citations99

US5280611AJan 18, 1994

Method for managing database recovery from failure of a shared store in a system including a plurality of transaction-based systems of the write-ahead logging type

IBM234 citations99

US5551027AAug 27, 1996

Multi-tiered indexing method for partitioned data

IBM652 citations98

US5465328ANov 7, 1995

Fault-tolerant transaction-oriented data processing

IBM250 citations98

US5455944AOct 3, 1995

Method for managing logging and locking of page free space information in a transaction processing system

IBM127 citations98

US5440727AAug 8, 1995

Asynchronous replica management in shared nothing architectures

IBM232 citations98

US5280612AJan 18, 1994

Multiple version database concurrency control system

IBM321 citations98

US5170480ADec 8, 1992

Concurrently applying redo records to backup database in a log sequence using single queue server per queue at a time

IBM404 citations98

US7395258B2Jul 1, 2008

System and method for adaptive database caching

IBM68 citations97

US5408653AApr 18, 1995

Efficient data base access using a shared electronic store in a multi-system environment with shared disks

IBM116 citations97

US5276835AJan 4, 1994

Non-blocking serialization for caching data in a shared cache

IBM111 citations97

US5241648AAug 31, 1993

Hybrid technique for joining tables

IBM134 citations97

US6581205B1Jun 17, 2003

Intelligent compilation of materialized view maintenance for query processing systems

IBM68 citations96

US6009425ADec 28, 1999

System and method for performing record deletions using index scans

IBM83 citations96

US5557791ASep 17, 1996

Outer join operations using responsibility regions assigned to inner tables in a relational database

IBM89 citations96

US5495601AFeb 27, 1996

Method to off-load host-based DBMS predicate evaluation to a disk controller

IBM44 citations96

US5452430ASep 19, 1995

System and method for storing persistent and non-persistent queued data and for recovering the persistent data responsive to a system restart

IBM60 citations96

US5418940AMay 23, 1995

Method and means for detecting partial page writes and avoiding initializing new pages on DASD in a transaction management system environment

IBM73 citations96

US5333303AJul 26, 1994

Method for providing data availability in a transaction-oriented system during restart after a failure

IBM87 citations96

US5247672ASep 21, 1993

Transaction processing system and method with reduced locking

IBM98 citations96

US5123104AJun 16, 1992

Method and apparatus for concurrent modification of an index tree in a transaction processing system utilizing selective indication of structural modification operations

IBM100 citations96

US4914569AApr 3, 1990

Method for concurrent record access, insertion, deletion and alteration using an index tree

IBM94 citations96

US6173292B1Jan 9, 2001

Data recovery in a transactional database using write-ahead logging and file caching

IBM108 citations95

US5557792ASep 17, 1996

Efficient data base access using a shared electronic store in a multi-system environment with shared disks

IBM63 citations95

US5287473AFeb 15, 1994

Non-blocking serialization for removing data from a shared cache

IBM96 citations95

US9547659B1Jan 17, 2017

Reducing the cost of update, delete, and append-only insert operations in a database

IBM28 citations94

US5761660AJun 2, 1998

Computer program product and program storage device for database access using a shared electronic store in a multi-system environment having shared disks

IBM74 citations94

US5455942AOct 3, 1995

Partial page write detection for a shared cache using a bit pattern written at the beginning and end of each page

IBM51 citations93

US6874104B1Mar 29, 2005

Assigning recoverable unique sequence numbers in a transaction processing system

IBM28 citations92

US5551031AAug 27, 1996

Program storage device and computer program product for outer join operations using responsibility regions assigned to inner tables in a relational database

IBM52 citations92

US7945577B2May 17, 2011

System and method for adaptive database caching

IBM26 citations89

US5258982ANov 2, 1993

Method of excluding inactive nodes from two-phase commit operations in a distributed transaction processing system

IBM20 citations81

US5586315ADec 17, 1996

Computer program product for off-loading host-based DBMS predicate evaluation to a disk controller

IBM15 citations74

US11360998B2Jun 14, 2022

Reducing the cost of update, delete, and append-only insert operations in a database

IBM2 citations73

US9772911B2Sep 26, 2017

Pooling work across multiple transactions for reducing contention in operational analytics systems

IBM5 citations73

US10261862B2Apr 16, 2019

Data replication in a database management system

IBM2 citations72

US10176205B2Jan 8, 2019

Using parallel insert sub-ranges to insert into a column store

IBM2 citations72

US9886347B2Feb 6, 2018

Data replication in a database management system

IBM4 citations72

US9697242B2Jul 4, 2017

Buffering inserts into a column store database

IBM2 citations70

US9881049B2Jan 30, 2018

Reducing the cost of update, delete, and append-only insert operations in a database

IBM1 citations63

Showing the top 50 of 65 patents by PatentIndex Score.

MOHAN CHANDRASEKARAN

Patents

Method and means for backup and restoration of a database system linked to a system for filing data

Method for generating a multi-tiered index for partitioned data

Method for non-hierarchical lock management in a multi-system shared data environment

Sysplex shared data coherency method

Multiple processor system having software for selecting shared cache entries of an associated castout class for transfer to a DASD with one I/O operation

Method and means for archiving modifiable pages in a log based transaction management system

Fast intersystem page transfer in a data sharing environment with record locking

Method for managing database recovery from failure of a shared store in a system including a plurality of transaction-based systems of the write-ahead logging type

Multi-tiered indexing method for partitioned data

Fault-tolerant transaction-oriented data processing

Method for managing logging and locking of page free space information in a transaction processing system

Asynchronous replica management in shared nothing architectures

Multiple version database concurrency control system

Concurrently applying redo records to backup database in a log sequence using single queue server per queue at a time

System and method for adaptive database caching

Efficient data base access using a shared electronic store in a multi-system environment with shared disks

Non-blocking serialization for caching data in a shared cache

Hybrid technique for joining tables

Intelligent compilation of materialized view maintenance for query processing systems

System and method for performing record deletions using index scans

Outer join operations using responsibility regions assigned to inner tables in a relational database

Method to off-load host-based DBMS predicate evaluation to a disk controller

System and method for storing persistent and non-persistent queued data and for recovering the persistent data responsive to a system restart

Method and means for detecting partial page writes and avoiding initializing new pages on DASD in a transaction management system environment

Method for providing data availability in a transaction-oriented system during restart after a failure

Transaction processing system and method with reduced locking

Method and apparatus for concurrent modification of an index tree in a transaction processing system utilizing selective indication of structural modification operations

Method for concurrent record access, insertion, deletion and alteration using an index tree

Data recovery in a transactional database using write-ahead logging and file caching

Efficient data base access using a shared electronic store in a multi-system environment with shared disks

Non-blocking serialization for removing data from a shared cache

Reducing the cost of update, delete, and append-only insert operations in a database

Computer program product and program storage device for database access using a shared electronic store in a multi-system environment having shared disks

Partial page write detection for a shared cache using a bit pattern written at the beginning and end of each page

Assigning recoverable unique sequence numbers in a transaction processing system

Program storage device and computer program product for outer join operations using responsibility regions assigned to inner tables in a relational database

System and method for adaptive database caching

Method of excluding inactive nodes from two-phase commit operations in a distributed transaction processing system

Computer program product for off-loading host-based DBMS predicate evaluation to a disk controller

Database management system and method of operation

Database management system and method of operation

Efficient performance of insert and point query operations in a column store

Database management system and method of operation

Reducing the cost of update, delete, and append-only insert operations in a database

Pooling work across multiple transactions for reducing contention in operational analytics systems

Data replication in a database management system

Using parallel insert sub-ranges to insert into a column store

Data replication in a database management system

Buffering inserts into a column store database

Reducing the cost of update, delete, and append-only insert operations in a database