US 2009/0063422 A1Published application

Search engine system using snapshot function of storage system

AssigneeHitachi, Ltd.

InventorShoji KODAMA

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Abstract

The present invention relates a retrieving technology by using an index obtained at a specific time point and a rule obtained at a specific time point. The present invention provides a storage system includes: a first logical unit for storing an index; a second logical unit for storing a rule that defines how to output search results; a third logical unit for storing a snapshot of the index created based on a predetermined time; and a fourth logical unit for storing a snapshot of the rule created based on a predetermined time; a search engine server is configured to: search the index stored in the third logical unit with a keyword included in a search request for an index record; and output storage location information of a data object included in the extracted index record in an order according to the rule stored in the fourth logical unit.

Claims19

Dependent claims

A retrieval system, comprising:

a storage system;
and
a search engine server coupled to the storage system, for retrieving a data object satisfying search criteria from among a plurality of data objects in accordance with a search request, wherein:
the storage system comprises:
a first logical unit for storing an index including a plurality of index records;
a second logical unit for storing a rule that defines how to output search results;
at least one third logical unit for storing a snapshot of the index;
and
at least one fourth logical unit for storing a snapshot of the rule;
each of the plurality of index records is created for any one of the plurality of data objects, and includes storage location information indicating where the data object is stored and a keyword list of at least one keyword included in the data object;
and
the search engine server is configured to:
select the third logical unit and the fourth logical unit based on a search request upon reception of the search request;
search the index stored in the selected third logical unit with a keyword included in the search request for an index record whose keyword list includes the keyword;
and
output the storage location information of the data object included in at least one extracted index record in an order according to the rule stored in the selected fourth logical unit.

13 more elements

A search engine server for retrieving a data object satisfying search criteria from among a plurality of data objects, comprising:

a processor;
and
a storage unit, wherein
the storage unit holds information indicating storage locations of:
an index including a plurality of index records;
a rule that defines how to output search results;
at least one data image of the index of a predetermined time;
and at least one data image of the rule of a predetermined time,
each of the plurality of index records is created for one of the plurality of data objects, and includes storage location information indicating where the data object is stored and a keyword list of at least one keyword included in the data object, and
the processor is configured to:
select the data image of the index of a predetermined time based on the search request with reference to the information recorded in the storage unit upon reception of the search request;
access the selected data image of the index;
search the data image of the index of a given time with a keyword included in the search request for an index record whose keyword list includes the keyword;
select the data image of the rule of a given time based on the search request with reference to the information recorded in the storage unit;
access the selected data image of the rule;
and
output the storage location information of the data object included in at least one selected index record in an order according to the data image of the rule of a predetermined time.

14 more elements

A method of retrieving a data object satisfying search criteria from among a plurality of data objects, executed by a search engine server, in accordance with a search request,

the search request including a search keyword and time information for identifying:
an index having a plurality of index records;
and a rule that defines how to output search results,
each of the plurality of index records being created for one of the plurality of data objects, and including storage location information indicating where the data object is stored and a keyword list of at least one keyword included in the data object,
the method comprising the steps of:
receiving the search request;
searching the data image of the index specified by the time information with a keyword included in the search request for an index record whose keyword list includes the keyword;
and
outputting the storage location information of the data object included in at least one searched index record in an order according to the data image of the rule specified by the time information.

6 more elements

Dependencies are inferred from the claim text.