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US 8,301,603 B2Granted
Information document search system, method and program for partitioned indexes on a time series in association with a backup document storage
AssigneeNEC Corporation
InventorsMasaki Kan, Yoshihiro Kajiki, Satoshi Yamakawa, Takashi Torii, Yuji Kaneko
Life of this patent
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Abstract
Disclosed is a system in which an index registration unit registers an index, which will be used for search processing, as a partitioned index which is partitioned on a time series basis, and a search means reads indexes older than a specified point in time, which is used as a search base point, to perform search processing, thereby searching for information based on a point in time in the past.
Claims27
An information search system comprising:
- a document storage unit in which documents are stored;
- and
- an index registration unit to register a partitioned index that is partitioned on a time series basis, as an index for information search, to read a document to be registered in the partitioned index, to perform predetermined preparatory processing necessary for registration in the partitioned index, and if information on the document to be registered is not included in the partitioned index that is a registration target, to add index registration information obtained by performing the predetermined preparatory processing to the partitioned index that is the registration target,
- wherein, if a document is deleted, a null is registered as information of the deleted document in the latest partitioned index of the multiple partitioned indexes and the other partitions are not modified.
1 more element
An information search system comprising:
- a search condition input unit to receive, as a search condition, time or trigger information as a search base point;
- a search unit to select a corresponding partitioned index from a plurality of partitioned indexes that are partitioned on a time series basis, as an index for information search, based on the search condition, and to perform a search using the selected partitioned index,
- wherein, if a document is deleted, a null is registered as information of the deleted document in the latest partitioned index of the multiple partitioned indexes and the other partitions are not modified.
A method of information search comprising
- an index registration step, performed by a processor of a computing device, of registering information in a partitioned index, which is partitioned on a time series basis, as an index for information search,
- the index registration step including:
- reading, by the processor, a document to be registered in an index, from a document storage unit in which documents are stored;
- performing, by the processor, predetermined preparatory processing necessary for registration in an partitioned index;
- and
- if information on a document to be registered is not included in a partitioned index which is a registration target, adding, by the processor, index registration information, which is obtained in the preparatory processing, to the partitioned index which is a registration target,
- wherein, if a document is deleted, a null is registered as information of the deleted document in the latest partitioned index of the multiple partitioned indexes and the other partitions are not modified.
4 more elements
A method of information search comprising:
- receiving, by a processor of a computing device, as a search condition, time or trigger information, which is a search base point;
- and
- selecting, by the processor, a corresponding partitioned index from a plurality of partitioned indexes, partitioned on a time series basis, as an index for information search based on the search condition and performing a search using the selected partitioned index,
- wherein, if a document is deleted, a null is registered as information of the deleted document in the latest partitioned index of the multiple partitioned indexes and the other partitions are not modified.
1 more element
A program stored on a non-transitory computer-readable medium for causing a computer to execute index registration processing of registering information in a partitioned index, partitioned on a time series basis, as an index for information search,
- the index registration processing including:
- reading a document to be registered in the index, from document storage unit in which documents are stored;
- performing predetermined preparatory processing necessary for registration in the index;
- and
- if information on a document to be registered is not included in a partitioned index which is a registration target,
- adding index registration information, which is obtained in the preparatory processing, to the partitioned index which is a registration target,
- wherein, if a document is deleted, a null is registered as information of the deleted document in the latest partitioned index of the multiple partitioned indexes and the other partitions are not modified.
4 more elements
A program stored on a non-transitory computer-readable medium for causing a computer to execute the processing comprising:
- receiving, as a search condition, time or trigger information, which is a search base point;
- and
- selecting a corresponding partitioned index from a plurality of partitioned indexes, partitioned on a time series basis, based on the search condition and performing a search using the selected partitioned index,
- wherein, if a document is deleted, a null is registered as information of the deleted document in the latest partitioned index of the multiple partitioned indexes and the other partitions are not modified.
1 more element
Dependencies are inferred from the claim text.