Providing data structures for determining whether keys of an index are present in a storage system
US8386494B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 7, 2008 |
| Grant date | Feb 26, 2013 |
| Priority date | — |
| Expiry date | Nov 12, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/2272
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Keys of an index are associated with corresponding data chunks in a storage system. In response to a request for a particular key, a particular location is accessed in a first data structure which is maintained in a first storage using a first portion of the particular key. In response to the particular location containing a first value, indicating that the particular key is not present in the index. In response to the particular location containing a second value, a map is accessed using a second portion of the particular key to retrieve an entry in a second data structure maintained in a second storage. The second data structure provides a collision chain to link entries of the second data structure that share a common value of the second portion of the particular key. The first data structure, map, and second data structure are part of the index.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.