Abstract: A storage system and a data migration method that enable most suitable data migration with the correlation between data managed by particular applications being taken into account. The above storage system and data migration method are configured to collect operational information for each volume; respectively calculate a required volume performance level that is a level of performance required of the volume storing data that is a migration target, and an actual volume performance level that is a level of performance for each volume established in a storage apparatus, based on the collected information; and, in accordance with the calculated required volume performance level and each of the actual volume performance levels, when necessary, migrate the data that is a migration target to another volume having an actual volume performance level corresponding to the required volume performance level of the volume storing that data.

Abstract: The present invention provides a data migration technique enabling a required performance to be satisfied as closely as possible. A server obtains an IOPS measurement value of a plurality of business APs and an IOPS measurement value of a plurality of logical volumes serving as the access destinations of the respective business APs, and on the basis of the various obtained IOPS measurement values, selects a source sub-candidate from a plurality of VOLs. The server identifies a parity group to which the selected source sub-candidate belongs from a plurality of parity groups, sets the two or more VOLs belonging to the identified parity group as two or more source candidates, and selects a plurality of target candidates from a plurality of other VOLs.

Abstract: A cluster-structured storage system where the access performance from a host system to a volume in an alternative-type storage subsystem is not degraded during failover, and a method for managing volume in the storage system. In this storage system, storage areas forming a primary storage subsystem and storage areas forming a standby storage subsystem are both hierarchized and correspondence relationships are established between the hierarchical levels. A copy destination volume is located on a hierarchical level associated with the hierarchical level of a copy source volume.

Abstract: Provided are a storage system and a data management method capable of improving the responsiveness of data that is periodically and frequently accessed without adversely affecting the data I/O processing. This storage system monitors the access frequency of a host system to a volume and copies the data stored in the volume to a volume with a response speed that is faster than the volume when the access frequency exceeds a first default value, switches the access destination of the host system to the volume of a copy source to the volume of a copy destination, writes data to be written in both the volume of the copy destination and the volume of the copy source when there is a write access from the host system to the volume of the copy destination, and returns the access destination of the host system to the volume of the copy source to the volume of the copy destination when the access frequency of the host system to the volume of the copy destination falls below a second default value.

Abstract: The present invention provides a data migration technique enabling a required performance to be satisfied as closely as possible. A server obtains an IOPS measurement value of a plurality of business APs and an IOPS measurement value of a plurality of logical volumes serving as the access destinations of the respective business APs, and on the basis of the various obtained IOPS measurement values, selects a source sub-candidate from a plurality of VOLs. The server identifies a parity group to which the selected source sub-candidate belongs from a plurality of parity groups, sets the two or more VOLs belonging to the identified parity group as two or more source candidates, and selects a plurality of target candidates from a plurality of other VOLs.

Abstract: A storage system and a data migration method that enable most suitable data migration with the correlation between data managed by particular applications being taken into account. The above storage system and data migration method are configured to collect operational information for each volume; respectively calculate a required volume performance level that is a level of performance required of the volume storing data that is a migration target, and an actual volume performance level that is a level of performance for each volume established in a storage apparatus, based on the collected information; and, in accordance with the calculated required volume performance level and each of the actual volume performance levels, when necessary, migrate the data that is a migration target to another volume having an actual volume performance level corresponding to the required volume performance level of the volume storing that data.

Abstract: A document information management method includes the steps to be executed by: a document registration program of storing a document in a document storage unit in accordance with a registered document by a user, document properties and a user profile, and forming document query and query structure indices of document properties and the user profile to store these indices in a query data storage unit and to further form several seeds documents; a related document retrieval program of retrieving a query data storage unit by using the seeds documents as query expressions to obtain query results of the document, the document properties and the user profile; and a related information notification program of generating related information of the document for each of the query results, and notifying the related information for each notice destination, including the related information of the document, of the document properties and of the user profile.

Abstract: An information processing apparatus divides a database table into separate tables according to a table division condition, correlates the separate tables to areas as logical storage devices, correlates the areas to storage devices, detects a predetermined area whose use amount is equal to or exceeds a predetermined value, assures an empty storage device having an empty capacity, and adds the empty storage device to a storage device correlated to the predetermined area.

Abstract: In document retrieval having the relevance feedback function to modify a searching profile for retrieval on the basis of a user's evaluation to evaluate a search result as pertinent or impertinent, recommencement of the relevance feedback returned to a desired time is permitted. An evaluation inputted by a user, a searching profile modified by the evaluation and a search result based on the searching profile are all saved while making the correspondence between them. When a request for restoration of searching profile is made, a searching profile corresponding to an evaluation designated by the user is restored.

Abstract: A document retrieval method using a computer program includes retrieving a first set of documents using a first query expression generated by the computer program. The first set of documents is provided to a user. An evaluation of the first set of documents is received from the user. The first query expression is changed to a second query expression generated by the computer program based on the evaluation.

Abstract: A text mining method whereby documents (texts) can be analyzed from a wide variety of visual points.

Abstract: In a text mining technique, if the system only extracts characteristic words and phrases frequently cooccurring with the respective components of an analysis axis as an analysis condition, similar words and phrases are extracted for any component. To clearly indicate existence of characteristic words and phrases which do not appear as cooccurrence words and phrases for other components of the analysis axis, it is desired to appropriately present distinguishable features between the components to the user. For this purpose, the frequency of appearances of a plurality of characteristic words and phrases in a document satisfying each analysis condition is calculated. As a result, multiple cooccurrence words and phrases and component-cooccurrence words and phrases are discriminatively displayed. It is therefore possible for the user to appropriately analyze the contents of a plurality of documents.

Abstract: In document retrieval having the relevance feedback function to modify a searching profile for retrieval on the basis of a user's evaluation to evaluate a search result as pertinent or impertinent, recommencement of the relevance feedback returned to a desired time is permitted. An evaluation inputted by a user, a searching profile modified by the evaluation and a search result based on the searching profile are all saved while making the correspondence between them. When a request for restoration of searching profile is made, a searching profile corresponding to an evaluation designated by the user is restored.

Abstract: A document information management method includes the steps to be executed by: a document registration program of storing a document in a document storage unit in accordance with a registered document by a user, document properties and a user profile, and forming document query and query structure indices of document properties and the user profile to store these indices in a query data storage unit and to further form several seeds documents; a related document retrieval program of retrieving a query data storage unit by using the seeds documents as query expressions to obtain query results of the document, the document properties and the user profile; and a related information notification program of generating related information of the document for each of the query results, and notifying the related information for each notice destination, including the related information of the document, of the document properties and of the user profile.

Abstract: The efficiency of document retrieval work is improved by retrieving suitable related words conforming to the user's intention. The document retrieval method for retrieving desired documents from a document database by using a key word includes: extracting related words relating to an input key word and terms of validity of the related words; retrieving documents by using the extracted related words as retrieval words; and selecting documents that satisfy the extracted terms of validity from among the retrieved documents.

Abstract: In a text mining technique, if the system only extracts characteristic words and phrases frequently cooccurring with the respective components of an analysis axis as an analysis condition, similar words and phrases are extracted for any component. To clearly indicate existence of characteristic words and phrases which do not appear as cooccurrence words and phrases for other components of the analysis axis, it is desired to appropriately present distinguishable features between the components to the user. For this purpose, the frequency of appearances of a plurality of characteristic words and phrases in a document satisfying each analysis condition is calculated. As a result, multiple cooccurrence words and phrases and component-cooccurrence words and phrases are discriminatively displayed. It is therefore possible for the user to appropriately analyze the contents of a plurality of documents.

Abstract: A document retrieval method using a computer program includes retrieving a first set of documents using a first query expression generated by the computer program. The first set of documents is provided to a user. An evaluation of the first set of documents is received from the user. The first query expression is changed to a second query expression generated by the computer program based on the evaluation.

Abstract: In a data dictionary directory system, the definition information to be registered in a dictionary is registered being divided into several definition units. A data base system registers the definition information and confirms the coordination of the contents of definition among the definition units. The definition information is registered without confirming the coordination. The coordination is confirmed when it becomes necessary to confirm the coordination among the definition informations registered in the dictionary.

Abstract: In a database having a dictionary/directory, the dictionary/directory is processed to form a directory using information in the dictionary, or is processed for other purposes. A process record including identification information associated with the process is stored in the dictionary/directory. In a dictionary deletion process, the stored record is designated and read out such that associated information indicated by the process record is also deleted in a batch manner.