The patent's assignee for patent application serial number 743723 is
News editors obtained the following quote from the background information supplied by the inventors: "The present invention generally relates to a method, system, program, and device for generating a list of file data about which search indices are to be updated in a search system, and more particularly, to a method, system, program, and device for creating, at high speed, a list of files added, updated, or deleted in the data stored in a file server, based on operation histories acquired through an interface, in the case where the file server in which search indices are to be created has the interface for acquiring the histories of operations performed on the data in the file server.
"As the speed of computer performance has become higher, and the capacities of HDDs have become larger in recent years, a huge number of unstructured documents are being created. Therefore, there is an increasing demand for search systems that are capable of accurately retrieving required documents from an enormous number of documents at high speed. To achieve an accurate search result, it is critical that adding, changing, and deleting operations performed, after the search index creation, on the file data in a file server storing unstructured documents to be searched be timely reflected by the search indices. In causing the search indices to reflect such operations, a long period of time is required if the search indices about unchanged file data are also updated. Therefore, only the search indices about the file data that have been added, changed, or deleted are normally updated. To do so, it is necessary to create a list of file data that have been added, changed, or deleted.
"To satisfy the demand for such search systems, there is a type of system including an interface that stores the histories of operations performed on the file data in a file server, and provides the operation histories in response to a request from the outside.
"One of such conventional arts is disclosed in JP Patent Publication (Kokai) No. 2006-268456 A.
"To cause the search indices to timely reflect adding, changing, and deleting operations performed on file data, there is a suggested method for achieving high speed by using a large number of servers that perform, in a distributed manner, an operation to create new search indices about search target files in the file server, and an operation to update the search indices about the files that have been added, changed, or deleted.
"In creating a list of file data for which indices are to be created and updating is to be performed, an interface that returns a list of files to be updated is used, if the file server provides such an interface. If the file server does not include such an interface, however, it is normally necessary to list the files to be processed, and determine whether to perform an updating operation, by scanning all the file data existing in the search index creation area in the file server.
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