C
Chi-Kim Hoang
Researcher at Business International Corporation
Publications - 9
Citations - 288
Chi-Kim Hoang is an academic researcher from Business International Corporation. The author has contributed to research in topics: Remote evaluation & Column (database). The author has an hindex of 7, co-authored 9 publications receiving 288 citations.
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Patent
Distributed consistent grid of in-memory database caches
Chi-Kim Hoang,Tirthankar Lahiri,Marie-Anne Neimat,Chih-Ping Wang,John Ernest Miller,Dilys Thomas,Nagender Bandi,Susan Cheng +7 more
TL;DR: In this article, 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, and consistency in the cache grid is maintained by ownership locks.
Patent
A database management system with efficient version control
TL;DR: In this article, a two copy versioning scheme is proposed for a high read load database and eliminates read dependencies, which provides efficient implementation for transactions executing under ANSI READ COMMITTED isolation, and is extensible to serializable isolation.
Patent
Direct-connect functionality in a distributed database grid
Tirthankar Lahiri,Derek A. Taylor,Nagender Bandi,John Ernest Miller,Chi-Kim Hoang,Ryder B. Rishel,Aravamudhan Varadarajan,Chih-Ping Wang,Susan Cheung,Samuel Drake,Paul Tuck,David Aspinwall +11 more
TL;DR: In this paper, a database is stored as a plurality of database shards in a distributed database grid comprising of grid elements, each including a mid-tier database system, and each grid element receives, from an application executing in the same memory as a database system of the first grid element, a database transaction including at least one database operation on specific data stored in a first database shard that belongs to the grid element.
Patent
Neighboring locking technique for increasing concurrency among transactions
TL;DR: In this paper, the authors propose new lock modes based on the concept of neighborhoods and are applied to spaces in indexes, including a Read, or shared, neighborhood (Snei) lock mode and a Write neighborhood (Xnei), which enhance concurrency among non-serializable transactions.
Patent
Column Domain Dictionary Compression
Tirthankar Lahiri,Chi-Kim Hoang,Dina Thomas,Kirk Meredith Edson,Subhradyuti Sarkar,Mark Lawrence Mcauliffe,Marie-Anne Neimat,Chih-Ping Wang +7 more
TL;DR: In column domain dictionary compression, column values in one or more columns are tokenized by a single dictionary as mentioned in this paper, where the domain of the dictionary is the entire set of columns and a dictionary may not only map a token to a tokenized value, but also count the number of occurrences of the token and corresponding tokenized values in the dictionary's domain.