Efficient file access in a large repository using a two-level cache

A two-level cache to facilitate resolving resource path expressions for a hierarchy of resources is described, which includes a system-wide shared cache and a session-level cache. The shared cache is organized as a hierarchy of hash tables that mirrors the structure of a repository hierarchy. A part...

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Main Authors Idicula, Sam, Petride, Sabina, Khaladkar, Bhushan, Agarwal, Nipun
Format Patent
LanguageEnglish
Published 04.12.2012
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Abstract A two-level cache to facilitate resolving resource path expressions for a hierarchy of resources is described, which includes a system-wide shared cache and a session-level cache. The shared cache is organized as a hierarchy of hash tables that mirrors the structure of a repository hierarchy. A particular hash table in a shared cache includes information for the child resources of a particular resource. A database management system that manages a shared cache may control the amount of memory used by the cache by implementing a replacement policy for the cache based on one or more characteristics of the resources in the repository. The session-level cache is a single level cache in which information for target resources of resolved path expressions may be tracked. In the session-level cache, the resource information is associated with the entire path expression of the associated resource.
AbstractList A two-level cache to facilitate resolving resource path expressions for a hierarchy of resources is described, which includes a system-wide shared cache and a session-level cache. The shared cache is organized as a hierarchy of hash tables that mirrors the structure of a repository hierarchy. A particular hash table in a shared cache includes information for the child resources of a particular resource. A database management system that manages a shared cache may control the amount of memory used by the cache by implementing a replacement policy for the cache based on one or more characteristics of the resources in the repository. The session-level cache is a single level cache in which information for target resources of resolved path expressions may be tracked. In the session-level cache, the resource information is associated with the entire path expression of the associated resource.
Author Khaladkar, Bhushan
Idicula, Sam
Agarwal, Nipun
Petride, Sabina
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Shadmon et al. (8065308) 20111100
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"20 Accessing Oracle XML DB Repository Data" downloaded from the Internet Aug. 25, 2009 < http://download.oracle.com/docs/cd/B19306-01/appdev.102/b14259 > 10 pages.
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Snippet A two-level cache to facilitate resolving resource path expressions for a hierarchy of resources is described, which includes a system-wide shared cache and a...
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Title Efficient file access in a large repository using a two-level cache
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