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公开(公告)号：WO2013033030A1
公开(公告)日：2013-03-07
申请号：PCT/US2012/052547
申请日：2012-08-27
Applicant: ORACLE INTERNATIONAL CORPORATION , LAHIRI, Tirthankar , HOANG, Chi-Kim , THOMAS, Dina , EDSON, Kirk Meredith , SARKAR, Subhradyuti , MCAULIFFE, Mark , NEIMAT, Marie-Anne , WANG, Chih-Ping
Inventor： LAHIRI, Tirthankar , HOANG, Chi-Kim , THOMAS, Dina , EDSON, Kirk Meredith , SARKAR, Subhradyuti , MCAULIFFE, Mark , NEIMAT, Marie-Anne , WANG, Chih-Ping
CPC classification number: H03M7/42 , G06F17/30315 , H03M7/3088
Abstract: In column domain dictionary compression, column values in one or more columns are tokenized by a single dictionary. The domain of the dictionary is the entire set of columns. A dictionary may not only map a token to a tokenized value, but also to a count ("token count") of the number of occurrences of the token and corresponding tokenized value in the dictionary's domain. Such information may be used to compute queries on the base table.
Abstract translation: 在列域字典压缩中，一个或多个列中的列值由单个字典进行标记化。 字典的域是整个列的集合。 字典不仅可以将令牌映射到标记值，还可以映射令牌的出现次数和字典域中相应的标记值的计数（“令牌计数”）。 此类信息可用于计算基表上的查询。
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公开(公告)号：WO2016182635A1
公开(公告)日：2016-11-17
申请号：PCT/US2016/023529
申请日：2016-03-22
Applicant: ORACLE INTERNATIONAL CORPORATION
Inventor： LAHIRI, Tirthankar , TAYLOR, Derek , BANDI, Nagender , MILLER, John , HOANG, Chi-Kim , RISHEL, Ryder , ARAVAMUDHAN, Varadarajan , WANG, Chih-Ping , CHEUNG, Susan , DRAKE, Samuel , TUCK, Paul , ASPINWALL, David
IPC: G06F17/30
CPC classification number: G06F17/30377 , G06F17/30575
Abstract: 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. 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.
Abstract translation: 数据库作为多个数据库分片存储在包括多个网格元素的分布式数据库网格中，每个网格元素包括中间层数据库系统。 第一网格元件从与第一网格元素的中间层数据库系统在同一存储器中执行的应用接收第一数据库事务，该第一数据库事务包括存储在第一数据库分片中的特定数据的至少一个数据库操作，该数据库操作属于 第一个网格元素 第一个网格元素执行并提交第一个数据库事务而不参与另一个网格元素。 第一个网格元素接收需要访问不属于第一个网格元素的另一个数据库分片的第二个数据库事务。 多个网格元素的多个网格元素执行第二数据库事务并使用两阶段提交协议提交第二数据库事务。
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公开(公告)号：WO2020082008A1
公开(公告)日：2020-04-23
申请号：PCT/US2019/057046
申请日：2019-10-18
Applicant: ORACLE INTERNATIONAL CORPORATION
Inventor： LAHIRI, Tirthankar , REAMES, Martin , MAKINO, Kao , RAGHAVAN, Ananth , WANG, Chih-Ping , KOGAWA, Mutsumi , GARCIA, Jorge Luis Issa
IPC: G06F16/23
Abstract: In an in-memory database management system, non-volatile random access memories (NVRAMs) are used to store database data and control data. Because this data is stored in NVRAM, the data survives system failures. Recovery from a system failure may be accomplished more quickly by modifying the surviving data in NVRAM, rather than loading a checkpoint and applying uncheckpointed transactions needed to synchronize the database. Because in this form of recovery the database state that serves as the starting point for applying change records is stored in the NVRAM, this form of recovery is referred to herein as in-memory-based recovery.
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公开(公告)号：EP3295332B1
公开(公告)日：2020-02-19
申请号：EP16712181.3
申请日：2016-03-22
Applicant: Oracle International Corporation
Inventor： LAHIRI, Tirthankar , TAYLOR, Derek , BANDI,Nagender , MILLER, John , HOANG, Chi-Kim , RISHEL, Ryder , ARAVAMUDHAN, Varadarajan , WANG, Chih-Ping , CHEUNG, Susan , DRAKE, Samuel , TUCK, Paul , ASPINWALL, David
IPC: G06F16/27
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