Abstract: An information processing device includes a processor, and an input/output device configured to input/output data from/to the processor, wherein the processor is configured to repeatedly execute a processing loop including execution control processing of checking an event from the input/output device, and when an event is detected, executing processing depending on the event detected, measure, when the information processing device is in an idle state, a first count value indicating an execution frequency of the processing loop per unit time, measure, when the information processing device is in an execution state in which the information processing device executes given processing including input/output processing with the input/output device, a second count value indicating the execution frequency of the processing loop per the unit time, and calculate, based on the first count value and the second count value, an indicator indicating a utilization rate of the processor.

Abstract: To provide a structure of a heat exchanger core that enables the outer periphery of an stacked body 8 including an assembly of flat tubes to be held in a previously fastened state and is excellent in mass-productivity, external frame portions of a pair of frame bodies are fitted onto both ends of a bulging portion of the stacked body of the flat tubes, and, in the state where the stacked body is restrained, a casing is additionally fitted onto the outer periphery of the stacked body.

Abstract: A storage apparatus includes a first storage device and a processor. The first storage device is configured to store therein first information blocks used to recover second information blocks stored in a second storage device. The processor is configured to read the first information blocks from the first storage device in an order of addresses of storage areas of the first storage device. The processor is configured to output part of the first information blocks which have been read from the first storage device to respective recovery destinations of the second information blocks to recover the second information blocks step by step.

Abstract: To provide a structure of a heat exchanger core that enables the outer periphery of an stacked body 8 including an assembly of flat tubes to be held in a previously fastened state and is excellent in mass-productivity, external frame portions of a pair of frame bodies are fitted onto both ends of a bulging portion of the stacked body of the flat tubes, and, in the state where the stacked body is restrained, a casing is additionally fitted onto the outer periphery of the stacked body.

Abstract: A processor executes a procedure including performing a repair process including first detecting whether there is any abnormality in data read out from a first storage, repairing abnormal data that is the data in which abnormality is detected as a result of the first detection, and storing the repaired data in a second storage area, second detecting when an address of data changed in the repair process and an address of a read-out source of the abnormal data in the first storage area match, whether there is any abnormality in data read out from an area indicated by the address of data changed in the repair process and the address of the read-out source of the abnormal data in the first storage area, repairing and storing, in the second storage area, the data in which abnormality is found as a result of the second detection.

Abstract: A storage apparatus includes a first storage device and a processor. The first storage device is configured to store therein first information blocks used to recover second information blocks stored in a second storage device. The processor is configured to read the first information blocks from the first storage device in an order of addresses of storage areas of the first storage device. The processor is configured to output part of the first information blocks which have been read from the first storage device to respective recovery destinations of the second information blocks to recover the second information blocks step by step.

Abstract: A processor executes a procedure including performing a repair process including first detecting whether there is any abnormality in data read out from a first storage, repairing abnormal data that is the data in which abnormality is detected as a result of the first detection, and storing the repaired data in a second storage area, second detecting when an address of data changed in the repair process and an address of a read-out source of the abnormal data in the first storage area match, whether there is any abnormality in data read out from an area indicated by the address of data changed in the repair process and the address of the read-out source of the abnormal data in the first storage area, repairing and storing, in the second storage area, the data in which abnormality is found as a result of the second detection.

Abstract: A non-transitory, computer-readable medium storing a program that causes a computer that controls data storage apparatuses respectively storing plural data, and a storing apparatus storing metadata that includes for each of the data, attribute information and storage location information, the process includes receiving a snapshot collection request for a given data group having specified attribute information; determining with respect to the data storage apparatuses and when the collection request is received, whether any of the data of the given data group is stored therein, based on the attribute information and the storage location information; and generating, with respect to each of the data storage apparatuses storing data of the given data group, a snapshot of the plural data stored therein, by controlling the data storage apparatus and further generating a snapshot of the metadata by controlling the storing apparatus.

Abstract: An information processing apparatus includes an identifying unit and a verifying unit. The identifying unit identifies, among a plurality of unit storage areas in a volume storing therein one or more pieces of management object information managed by a file system and one or more pieces of management information corresponding one-to-one with the management object information pieces and used to manage the corresponding management object information pieces, one or more unit storage areas whose information has been updated within a predetermined time frame. The verifying unit verifies the consistency between the management object information pieces and the management information pieces in the file system using the information of the identified unit storage areas.

Abstract: A computer-readable recording medium stores a cluster system control program controlling a cluster system in which clustered nodes are connected to a shared disk having a journaling file system. The cluster system control program causes a computer to execute a request reply information generation procedure for, when a request is accepted from a client, generating request reply information including an identification number identifying the request and reply data to respond to the request from the client, and a saving procedure for saving the request reply information generated by the request reply information generation procedure in the journaling file system.

Abstract: A non-transitory, computer-readable medium storing a program that causes a computer that controls data storage apparatuses respectively storing plural data, and a storing apparatus storing metadata that includes for each of the data, attribute information and storage location information, the process includes receiving a snapshot collection request for a given data group having specified attribute information; determining with respect to the data storage apparatuses and when the collection request is received, whether any of the data of the given data group is stored therein, based on the attribute information and the storage location information; and generating, with respect to each of the data storage apparatuses storing data of the given data group, a snapshot of the plural data stored therein, by controlling the data storage apparatus and further generating a snapshot of the metadata by controlling the storing apparatus.

Abstract: A distributed file operation method is executed by a computer that is connected to an arrangement information management apparatus and a plurality of file management apparatuses through a network. The arrangement information management apparatus is configured to manage arrangement information of files. The plurality of file management apparatuses is configured to store the files. The distributed file operation method includes generating an operating request on a first file on the basis of a first protocol, making, by the computer, an inquiry to the arrangement information management apparatus on arrangement information of the first file by specifying an identifier of the first file, and transmitting the operating request to one of the plurality of file management apparatuses indicated by the arrangement information that is provided in response to the inquiry by the arrangement information management apparatus.

Abstract: A computer-readable, non-transitory medium storing a program causing a computer to execute a process, the computer being connected through a network to a plurality of file management devices which store a plurality of files distributed in the plurality of file management devices, the process including: extracting an identification information of a file management device by a file descriptor specified in a request for locking a file, the request being generated by an application that is activated on the computer; and transmitting the request for locking the file through an interface section to the file management device corresponding to the identification information.

Abstract: A system including computers storing files, a first computer of the computers includes a storage unit to store information about a first directory that includes identification information of a second computer that store information about a second directory or a file under the first directory, and a replying unit to reply, when a request for looking up information about the second directory or the file is received, with the identification information of the second computer stored in the storage unit.

Abstract: A computer-readable recording medium stores a cluster system control program controlling a cluster system in which clustered nodes are connected to a shared disk having a journaling file system. The cluster system control program causes a computer to execute a request reply information generation procedure for, when a request is accepted from a client, generating request reply information including an identification number identifying the request and reply data to respond to the request from the client, and a saving procedure for saving the request reply information generated by the request reply information generation procedure in the journaling file system.

Abstract: When a network file service is transferred from a transfer source node to a transfer target node, a file service state utilized by a client in the transfer source node is transferred to the transfer target node. Then, after the file service state is transferred to the transfer target node, a file service request (I/O request) reached from the client to the transfer source node is transmitted to the transfer target node.

Abstract: A namespace replication database update step that acquires events relating to namespace update from a FS control server 112 for controlling a primary storage 133 and updates, based on the events, a namespace replication DB 132 created based upon inode information and link information in the primary storage 133; and a namespace replication database correction step that acquires inode information having ctime after a predetermined time and link information corresponding to the inode information from the FS control server 112, and corrects the namespace replication DB 132 if events which have not been reflected on the namespace replication DB 132 are lost, are caused to be performed by the computer

Abstract: A file management program which enables efficient access to data in a directory file by utilizing an extent-based data access structure. When a processing request containing the name information for a file to be processed is inputted, a hash-value generation unit applies a predetermined hash function to the name information, and generates a hash value of the file to be processed. Next, a physical-block-number acquisition unit looks up a hash-value-range table, extracts hash-value-range information, and acquires a physical-block number from the hash-value-range information, where a hash-value range containing the hash value of the file to be processed is included in the hash-value-range information. Then, a directory processing unit acquires from a physical block in a storage device data corresponding to the acquired physical-block number, and performs processing of the data according to the processing request.

Abstract: An access control method includes receiving an access request to a file system from a user terminal through a common Internet file system (CIFS) or a network file system (NFS) and determining whether the access request should be allowed. The method includes determining whether a basic permission attribute of an access request used in the NFS should be allowed with reference to access control information associated with basic permission attributes, the basic permission attribute being associated with an access request received from the user terminal through the CIFS, the access control information indicating whether an access request to respective objects of the file system should be allowed or denied, and the access control information being stored in an access-control-information storing unit. The method also includes determining whether the access request associated with the allowed basic permission attribute should be allowed, in reference to the access control information.

Abstract: An HSM program allows a computer to execute control for an HSM apparatus. The program allows the computer to execute: an event data recording step that records a file operation for the primary storage or archive state change as event data; a namespace replication step that generates a namespace replication database obtained by replicating the namespace of the primary storage; a namespace-following step that allows the namespace replication database to follow the namespace of the primary storage based on the event data; and a file migration instruction step that instructs file migration between the primary and secondary storages based on the namespace replication database.