Extraction method, computer product, extracting apparatus, and extracting system

An extraction method comprising:

• storing first information, second information, and third information into a storage unit, the first information indicating whether each of a plurality of files respectively includes a specific plurality of character data, the second information indicating whether at least any one of the plurality of files includes the specific plurality of character data, and the third information indicating for each of the plurality of files, whether the file is a search object;
• updating among the third information, information indicating a file to be the search object, the information being updated to not indicate the file to be the search object, when all of the plurality of files are excluded from being the search object;
• and
• extracting a file that is the search object and includes the specific plurality of character data, based on the first information and the third information when a search request is accepted for the specific plurality of character data and the second information is detected to include the specific plurality of character data.

An extraction method comprising:

• storing first information and second information into a storage unit, the first information indicating whether each of a plurality of files respectively includes a specific plurality of character data, and the second information indicating whether at least any one of a portion of the plurality of files includes the specific plurality of character data;
• updating the first information and the second information with addition of an additional file to the plurality of files, the first information being updated by merging additional presence information that indicates whether the additional file includes the specific plurality of character data, and the second information being updated to indicate whether at least any one of the plurality of files that the additional file is added includes the specific plurality of character data, using the additional presence information;
• extracting from the plurality of files, a file that includes the specific plurality of character data based on the first information, when a search request is accepted for the specific plurality of character data and the second information is detected to include the specific plurality of character data;
• and
• extracting from among files not included among the portion of the plurality of files, a file that includes the specific plurality of character data based on the first information, when the search request is accepted for the specific plurality of character data and the second information is detected to not include the specific plurality of character data.

A non-transitory, computer-readable recording medium storing an extraction program that causes a computer to execute:

• storing first information and second information into a storage unit, the first information indicating whether each of a plurality of files respectively includes a specific plurality of character data and the second information indicating whether at least any one of the plurality of files includes the specific plurality of character data;
• updating the first information and the second information with addition of an additional file to the plurality of files, the first information being updated by merging additional presence information that indicates whether the additional file includes the specific plurality of character data, the second information being updated to indicate whether at least any one of the plurality of files that the additional file is added includes the specific plurality of character data, using the additional presence information;
• and
• extracting a file that includes the specific plurality of character data based on the first information, when a search request is accepted for the specific plurality of character data and the second information is detected to include the specific plurality of character data.

A non-transitory, computer-readable recording medium storing an extraction program that causes a computer to execute:

• storing first information and second information into a storage unit, the first information indicating whether each of a plurality of files respectively include a specific plurality of character data, and the second information indicating whether at least any one of a portion of the plurality of files includes the specific plurality of character data;
• updating the first information and the second information with addition of an additional file to the plurality of files, the first information being updated by merging additional presence information that indicates whether the additional file includes the specific plurality of character data, and the second information being updated to indicate whether at least any one of the portion of the plurality of files that the additional file is added includes the specific plurality of character data, using the additional presence information;
• extracting from the plurality of files, a file that includes the specific plurality of character data based on the first information, when a search request is accepted for the specific plurality of character data and the second information is detected to include the specific plurality of character data;
• and
• extracting from among files not included among the portion of the plurality of files, a file that includes the specific plurality of character data based on the first information, when the search request is accepted for the specific plurality of character data and the second information is detected to not include the specific plurality of character data.

A non-transitory, computer-readable recording medium storing an extraction program that causes a computer to execute:

• storing first information, second information, and third information into a storage unit, the first information indicating whether each of a plurality of files respectively includes a specific plurality of character data, the second information indicating whether at least any one of the plurality of files includes the specific plurality of character data, and the third information indicating for each of the plurality of files, whether the file is a search object;
• updating among the third information, information indicating a file to be the search object, the information being updated to not indicate the file to be the search object, when all of the plurality of files are excluded from being the search object;
• and
• extracting a file that is the search object and includes the specific plurality of character data, based on the first and the third information when a search request is accepted for the specific plurality of character data and the second information is detected to include the specific plurality of character data.

An extracting apparatus comprising:

• a storage unit that stores first information and second information, the first information indicating whether each of a plurality of files respectively includes a specific plurality of character data and the second information indicating whether at least any one of the plurality of files includes the specific plurality of character data;
• and
• a processor configured to:
• update the first information and the second information with addition of an additional file to the plurality of files, the first information being updated by merging additional presence information that indicates whether the additional file includes the specific plurality of character data, and the second information being updated to indicate whether at least any one of the plurality of files that the additional file is added includes the specific plurality of character data, using the additional presence information;
• and
• extract a file that includes the specific plurality of character data based on the first information, when a search request is accepted for the specific plurality of character data and the second information is detected to include the specific plurality of character data.

An extracting apparatus comprising:

• a storage unit that stores first information and second information, the first information indicating whether each of a plurality of files respectively includes a specific plurality of character data, and the second information indicating whether at least any one of a portion of the plurality of files includes the specific plurality of character data;
• and
• a processor configured to:
• update the first information and the second information with addition of an additional file to the plurality of files, the first information being updated by merging additional presence information that indicates whether the additional file includes the specific plurality of character data, and the second information being updated to indicate whether at least any one of the portion of the plurality of files that the additional file is added includes the specific plurality of character data, using the additional presence information;
• extract from among the plurality of files, a file that includes the specific plurality of character data based on the first information, when a search request is accepted for the specific plurality of character data and the second information is detected to include the specific plurality of character data, and extract from among files not included among the portion of the plurality of files, a file that includes the specific plurality of character data based on the first information, when the search request is accepted for the specific plurality of character data and the second information is detected to not include the specific plurality of character data.

An extracting apparatus comprising:

• a storage unit that stores first information, second information, and third information, the first information indicating whether each of a plurality of files respectively includes a specific plurality of character data, the second information indicating whether at least any one of the plurality of files includes the specific plurality of character data, and third information indicating for each of the plurality of files, whether the file is a search object;
• and
• a processor configured to:
• update among the third information, information indicating a file to be the search object, the information being updated to not indicate the file to be the search object, when all of the plurality of files are excluded from being the search object;
• and
• extract a file that is the search object and includes the specific plurality of character data, based on the first information and the third information when a search request is accepted for the specific plurality of character data and the second information is detected to include the specific plurality of character data.

An extracting system comprising:

• a plurality of computers;
• and
• an assigning apparatus that includes:
• a retaining unit that retains information indicating for each file group among a plurality of file groups obtained by dividing a plurality of files, whether at least one file included in the file group includes a specific plurality of character data,
• an updating unit that with addition of an additional file to the plurality of files, updates the information retained in the retaining unit into to indicate whether at least one file included in a file group to which the additional file is added includes the specific plurality of character data, and
• an assigning unit that assigns the plurality of file groups to each of the computers according to a count of the plurality of file groups indicated to include at least one file that includes the specific plurality of character data by the information retained in the retaining unit, when a search request is accepted for the specific plurality of character data, wherein
• each of the computers includes
• a storage unit that stores index information indicating for each of the plurality of file groups, whether each file included in the file group includes the specific plurality of character data, and
• a processor configured to:
• update the index information with the addition of the additional file to any of the plurality of file groups, the index information being updated to indicate whether any of the plurality of files included in a file group to which the additional file is added includes the specific plurality of character data, and
• extract a file that includes the specific plurality of character data, based on the index information that is for a file group assigned by the assigning apparatus and among the index information stored for each of the plurality of file groups by the storing unit.