Patents by Inventor Nagender Bandi
Nagender Bandi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11829349Abstract: A database is stored as a plurality of database shards in a distributed database grid comprising a plurality of grid elements, each including a mid-tier database system. A first grid element receives, from an application executing in the same memory as a mid-tier database system of the first grid element, a first database transaction including at least one database operation on specific data stored in a first database shard that belongs to the first grid element. The first grid element performs and commits the first database transaction without participation of another grid element of the plurality of grid elements. The first grid element receives a second database transaction that requires access to another database shard that does not belong to the first grid element. Multiple grid elements of the plurality of grid elements perform the second database transaction and commit the second database transaction using a two-phase commit protocol.Type: GrantFiled: May 11, 2015Date of Patent: November 28, 2023Assignee: Oracle International CorporationInventors: Tirthankar Lahiri, Derek Taylor, Nagender Bandi, John Miller, Chi-Kim Hoang, Ryder Rishel, Varadarajan Aravamudhan, Chih-Ping Wang, Susan Cheung, Samuel Drake, Paul Tuck, David Aspinwall
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Patent number: 11176115Abstract: Techniques are described for performing dependency locking to enable parallel execution of database server processes modifying the same object. In an embodiment, a DBMS receives a request to execute an operation on its managed database. The request may include an object identifier and a version identifier for a version of a database object, which is required for the successful execution of the operation on the database. The required version of the database object may not exist and may be generated only after the execution of another, second, operation on the database. The first database server process initiates execution of the earlier received operation on the database. The first database server process queries the first database for the version of the particular database object and determines that the version of the database object does not exist yet, in one embodiment.Type: GrantFiled: May 31, 2019Date of Patent: November 16, 2021Assignee: ORACLE INTERNATIONAL CORPORATIONInventors: Chi Kim Hoang, Chih-Ping Wang, Nagender Bandi, John Miller
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Publication number: 20200125549Abstract: Techniques are described for performing dependency locking to enable parallel execution of database server processes modifying the same object. In an embodiment, a DBMS receives a request to execute an operation on its managed database. The request may include an object identifier and a version identifier for a version of a database object, which is required for the successful execution of the operation on the database. The required version of the database object may not exist and may be generated only after the execution of another, second, operation on the database. The first database server process initiates execution of the earlier received operation on the database. The first database server process queries the first database for the version of the particular database object and determines that the version of the database object does not exist yet, in one embodiment.Type: ApplicationFiled: May 31, 2019Publication date: April 23, 2020Inventors: CHI KIM HOANG, CHIH-PING WANG, NAGENDER BANDI, JOHN MILLER
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Patent number: 9569475Abstract: A plurality of mid-tier databases form a single, consistent cache grid for data in one or more backend data sources, such as a database system. The mid-tier databases may be standard relational databases. Cache agents at each mid-tier database swap in data from the backend database as needed. Ownership locks maintain consistency in the cache grid. Cache agents prevent database operations that will modify cached data in a mid-tier database unless and until ownership of the cached data can be acquired for the mid-tier database. Cache groups define what backend data may be cached, as well as a general structure in which the backend data is to be cached. Metadata for cache groups is shared to ensure that data is cached in the same form throughout the entire grid. Ownership of cached data can then be tracked through a mapping of cached instances of data to particular mid-tier databases.Type: GrantFiled: March 13, 2013Date of Patent: February 14, 2017Assignee: Oracle International CorporationInventors: Chi-Kim Hoang, Tirthankar Lahiri, Marie-Anne Neimat, Chih-Ping Wang, John E. Miller, Dilys Thomas, Nagender Bandi, Susan Cheng
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Publication number: 20160335310Abstract: A database is stored as a plurality of database shards in a distributed database grid comprising a plurality of grid elements, each including a mid-tier database system. A first grid element receives, from an application executing in the same memory as a mid-tier database system of the first grid element, a first database transaction including at least one database operation on specific data stored in a first database shard that belongs to the first grid element. The first grid element performs and commits the first database transaction without participation of another grid element of the plurality of grid elements. The first grid element receives a second database transaction that requires access to another database shard that does not belong to the first grid element. Multiple grid elements of the plurality of grid elements perform the second database transaction and commit the second database transaction using a two-phase commit protocol.Type: ApplicationFiled: May 11, 2015Publication date: November 17, 2016Inventors: Tirthankar Lahiri, Derek Taylor, Nagender Bandi, John Miller, Chi-Kim Hoang, Ryder Rishel, Varadarajan Aravamudhan, Chih-Ping Wang, Susan Cheung, Samuel Drake, Paul Tuck, David Aspinwall
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Patent number: 8738568Abstract: A replication track is a designated group of transactions that are to be replicated at a destination database in a way that, with respect to any other transaction in the replication track, preserves transactional dependency. Further, transactions in a replication track can be replicated at the destination database without regard to transactional dependency of other transactions in another track. This facilitates concurrent parallel replication of transactions of different tracks. Replicating data in this manner is referred to herein as track replication. An application may request execution of transactions and designate different tracks for transactions.Type: GrantFiled: May 5, 2011Date of Patent: May 27, 2014Assignee: Oracle International CorporationInventors: Sourav Ghosh, Rohan Aranha, Tirthankar Lahiri, Mark McAuliffe, Chih-Ping Wang, Paul Tuck, Nagender Bandi, John E. Miller, Dina Thomas, Marie-Anne Neimat
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Patent number: 8401994Abstract: A plurality of mid-tier databases form a single, consistent cache grid for data in a one or more backend data sources, such as a database system. The mid-tier databases may be standard relational databases. Cache agents at each mid-tier database swap in data from the backend database as needed. Consistency in the cache grid is maintained by ownership locks. Cache agents prevent database operations that will modify cached data in a mid-tier database unless and until ownership of the cached data can be acquired for the mid-tier database. Cache groups define what backend data may be cached, as well as a general structure in which the backend data is to be cached. Metadata for cache groups is shared to ensure that data is cached in the same form throughout the entire grid. Ownership of cached data can then be tracked through a mapping of cached instances of data to particular mid-tier databases.Type: GrantFiled: September 18, 2009Date of Patent: March 19, 2013Assignee: Oracle International CorporationInventors: Chi Hoang, Tirthankar Lahiri, Marie-Anne Neimat, Chih-Ping Wang, John Miller, Dilys Thomas, Nagender Bandi, Susan Cheng
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Publication number: 20120284228Abstract: A replication track is a designated group of transactions that are to be replicated at a destination database in a way that, with respect to any other transaction in the replication track, preserves transactional dependency. Further, transactions in a replication track can be replicated at the destination database without regard to transactional dependency of other transactions in another track. This facilitates concurrent parallel replication of transactions of different tracks. Replicating data in this manner is referred to herein as track replication. An application may request execution of transactions and designate different tracks for transactions.Type: ApplicationFiled: May 5, 2011Publication date: November 8, 2012Inventors: Sourav Ghosh, Rohan Aranha, Tirthankar Lahiri, Mark McAuliffe, Chih-Ping Wang, Paul Tuck, Nagender Bandi, John E. Miller, Dina Thomas, Marie-Anne Neimat
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Publication number: 20110072217Abstract: A plurality of mid-tier databases form a single, consistent cache grid for data in a one or more backend data sources, such as a database system. The mid-tier databases may be standard relational databases. Cache agents at each mid-tier database swap in data from the backend database as needed. Consistency in the cache grid is maintained by ownership locks. Cache agents prevent database operations that will modify cached data in a mid-tier database unless and until ownership of the cached data can be acquired for the mid-tier database. Cache groups define what backend data may be cached, as well as a general structure in which the backend data is to be cached. Metadata for cache groups is shared to ensure that data is cached in the same form throughout the entire grid. Ownership of cached data can then be tracked through a mapping of cached instances of data to particular mid-tier databases.Type: ApplicationFiled: September 18, 2009Publication date: March 24, 2011Inventors: Chi Hoang, Tirthankar Lahiri, Marie-Anne Neimat, Chih-Ping Wang, John Miller, Dilys Thomas, Nagender Bandi, Susan Cheng