公开(公告)号：US09569475B2

公开(公告)日：2017-02-14

申请号：US13799572

申请日：2013-03-13

Applicant: Oracle International Corporation

Inventor： Chi-Kim Hoang ,  Tirthankar Lahiri ,  Marie-Anne Neimat ,  Chih-Ping Wang ,  John E. Miller ,  Dilys Thomas ,  Nagender Bandi ,  Susan Cheng

IPC: G06F17/30 ,  G06F12/08

CPC classification number: G06F17/30312 ,  G06F12/084

Abstract: 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.

Abstract translation: 多个中间层数据库形成用于一个或多个后端数据源（例如数据库系统）中的数据的单一，一致的高速缓存网格。 中间层数据库可以是标准关系数据库。 每个中间层数据库的缓存代理根据需要从后端数据库交换数据。 所有权锁在高速缓存网格中保持一致性。 高速缓存代理阻止数据库操作，将修改中间层数据库中的缓存数据，除非可以为中间层数据库获取缓存数据的所有权。 缓存组定义可以缓存哪些后端数据，以及要缓存后端数据的一般结构。 共享缓存组的元数据，以确保数据在整个网格中以相同的格式缓存。 然后可以通过将缓存的数据实例映射到特定中间层数据库来跟踪缓存数据的所有权。

公开(公告)号：US20130198249A1

公开(公告)日：2013-08-01

申请号：US13799572

申请日：2013-03-13

Applicant: Oracle International Corporation

Inventor： Chi-Kim Hoang ,  Tirthankar Lahiri ,  Marie-Anne Neimat ,  Chih-Ping Wang ,  John E. Miller ,  Dilys Thomas ,  Nagender Bandi ,  Susan Cheng

IPC: G06F17/30

CPC classification number: G06F17/30312 ,  G06F12/084

Abstract: 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.

Abstract translation: 多个中间层数据库形成用于一个或多个后端数据源（例如数据库系统）中的数据的单一，一致的高速缓存网格。 中间层数据库可以是标准关系数据库。 每个中间层数据库的缓存代理根据需要从后端数据库交换数据。 所有权锁在高速缓存网格中保持一致性。 高速缓存代理阻止数据库操作，将修改中间层数据库中的缓存数据，除非可以为中间层数据库获取缓存数据的所有权。 缓存组定义可以缓存哪些后端数据，以及要缓存后端数据的一般结构。 共享缓存组的元数据，以确保数据在整个网格中以相同的格式缓存。 然后可以通过将缓存的数据实例映射到特定中间层数据库来跟踪缓存数据的所有权。