摘要:
Storage nodes participating in the distributed storage system are divided into groups beforehand. A data replica creation unit operates so that a replica is created on each of the nodes participating in the distributed storage system on a hash ring. A unit that specifies an operating state of the system determines the number of data replicas for each group. The data replica creation unit traverses the hash ring and creates one or more replicas until it is determined that the number of replicas for each group is reached.
摘要:
An information re-organization system includes a plurality of counters coordinated to meaning attributes, and a re-organization incentive notification unit that updates, in case the information stored in preset storage unit has been updated, value of a counter out of the multiple counters that has the meaning attribute associated with contents updated. The information re-organization system also includes an information re-organization processor that executes, in case the value of the counter section updated has met one of a number of predetermined conditions for information re-organization, a processing for information re-organization corresponding to the condition for information re-organization on the information stored in the preset storage unit.
摘要:
An information retrieval system comprising: an information acquisition unit that acquires information as a subject of retrieval; a time information specifying unit that specifies time information owned by said information as the subject of retrieval; and an index updating unit that updates said index using the time information specified by said time information specifying unit; wherein said information retrieval system provides an information retrieving function of reproducing retrieved results at any time point by providing index for information retrieval with the time information and by using data of said index relevant to a reference point of retrieval identified at the time of retrieval.
摘要:
An information presentation system comprises a time-series search processing unit 1, a time-series search input/output unit 2, a period information extraction unit 4, and a period information presentation unit 3. The period information presentation unit 3 provides period information, extracted by the period information extraction unit 4, to the time-series search input/output unit 2, which presents the period information to a user.
摘要:
Disclosed is a system including a storage that includes a high-speed response past data protection unit that holds high-speed response past data, a continuous data protection unit that performs continuous data protection, a data synthesis unit that synthesizes data using the data in the high-speed response past data protection unit and data in the continuous data protection unit, and a past data updating unit that creates data corresponding to a predetermined trigger in advance. The past data updating unit restores the data corresponding to the predetermined trigger in advance. The data synthesis unit returns the high-speed response past data stored and held in the high-speed response past data protection unit. For a request to access data other than the one at the predetermined trigger, the data synthesis unit returns the data synthesized.
摘要:
Provided a plurality of data nodes connected in a network, each including a data storage unit. The data node of data replication destination temporarily stores data to be updated in an intermediate data structure, and converts asynchronously with respect to the update request to a target data structure to store the converted data in the data storage unit. Based on access history information stored in an access history recording unit, trigger information, concerning timing for execution of conversion to the target data structure performed asynchronously by the data node is changed.
摘要:
Access destination determination means determines a read destination and/or a write destination of specified data from nodes corresponding to the data and stored in data store destination storage means. Access probability calculation means calculates an access probability based on a history of accesses to the data, and stores the calculated access probability in access probability storage means. When no node corresponding to the specified data is stored in the data store destination storage means, access probability estimation means estimates an access probability of the data based on access probabilities stored in the access probability storage means, and the access destination determination means determines a write destination of the data based on the estimated access probability.
摘要:
A distributed system includes: a plurality of ordinary nodes provided with reduced-power states having different times of recovery to a normal operating state; and a management node for assigning a job to an ordinary node for carrying out the job. The management node has: node select means for selecting an ordinary node from ordinary nodes each put in one of the reduced-power states, assigning a job to the selected ordinary node and driving the selected ordinary node to carry out the assigned job; and node control means for executing control to restore an ordinary node selected by the node select means to the normal operating state. The node select means selects an ordinary node from the ordinary nodes each put in one of the reduced-power states having different times of recovery to the normal operating state in accordance with an ordinary-node order starting with an ordinary node existing in a reduced-power state and having a short time of recovery to the normal operating state.
摘要:
The index update unit analyses the information stored in a document repository to create an index for search and stores the index in a time-series divisional index storage unit and creates, from an ACL repository, an access control entry ACE in association with the index for search, which is correlation of information to be searched with access right of at least a group to which the user belongs. The ACL cache generation unit creates ACL cache data that correlates the user with access right to the information to be searched, from the ACE, and registers the ACL cache data created in an ACL cache. A search processing unit searches for an index for search in response to a request for search from said user. In case the ACL cache data correlating the user with the index for search is registered in the ACL cache, the search processing unit_takes, from among the information searched, the information, reference to which is allowed for the user as a search result, based on information in the ACL cache.
摘要:
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.