Abstract: A file system includes a first storage device; a second storage device storing data, stored in a main, to be written in the first storage device; a management unit that manages issuance times of writing instructions; a determination unit that determines an order of writing respective metadata, serving as management data of respective data, in the first storage device based on management information indicating a management relationship between the respective metadata; an allocation unit that sequentially stores, the metadata identified by the identifiers stored corresponding to the issuance times of the writing instructions and the writing instructions corresponding to the metadata, in the second storage device based on the writing order; and a control unit that writes, when the issuance times of the writing instructions are reached, the metadata stored in the second storage device before the writing instructions corresponding to the reached issuance times, in the first storage device.

Abstract: In a control method of an information processing apparatus, nodes of data distribution destinations among plural nodes that are connected with a network, which includes plural network switches that have a function to dynamically set an output destination port of broadcast data are included in a first domain. A transfer setting of packets relating to broadcast to each node included in the first domain for network switches that belong to routes to the each node included in the first domain is performed. Then, the packets relating to the broadcast to the each node included in the first domain are broadcast.

Abstract: A storage control device includes a processor. The processor is configured to acquire a first size. The processor is configured to calculate, for each of a plurality of storage devices, a total size of first data stored in each of the plurality of storage devices. The first data satisfies a predetermined condition. The processor is configured to select the first data in an ascending order of the total size. A sum of the total size of the selected first data is the first size or less. The processor is configured to copy the selected first data from the plurality of storage devices to a first storage device different from the plurality of storage devices.

Abstract: A computer system includes: a reference point determining unit that sets node allocation reference points for the job in association with job attribute information of the job, to node coordinate spaces where the plurality of computation nodes are arranged; and a node set searching unit that searches for a computation node set that is a set of computation nodes satisfying a predetermined condition related to a remote degree that is an estimate index of a communication time from the node allocation reference point in the node coordinate space.

Abstract: An apparatuses includes a processor, a storage unit, and a communication unit to access the storage unit without intermediary of the processor and to access a second apparatus of the plurality of information processing apparatuses via a communication unit of the second apparatus. The communication unit of a first apparatus of the plurality of information processing apparatuses executes at least one of a process of storing redundant data which is generated by making redundant data stored in the storage unit of the first apparatus in the storage unit of the second apparatus via the communication unit of the second apparatus, and a process of acquiring redundant data which is generated by making redundant data stored in the storage unit of the second apparatus via the communication unit of the second apparatus, and storing the acquired data in the storage unit of the first apparatus.

Abstract: An information processing apparatus, comprising a processor, and memory storing instructions for causing the processor to allocate a node in an information processing system including the information processing apparatus as an investigation node configured to perform an investigation of data stored in memory of a node of which an error is detected, instruct the investigation node to acquire data to be investigated from the node of which the error is detected, instruct the investigation node to perform an operation for determining whether a predetermined value in the acquired data is a normal value, and determine that a failure occurs in the node of which the error is detected when the predetermined value is not a normal value.

Abstract: The parallel computer system includes a plurality of information processing apparatuses and a management apparatus to control the information processing apparatuses. Each of the plurality of information processing apparatuses outputs a resource usage quantity variation with respect to a job at a predetermined time interval. The management apparatus generates an execution history containing an attribute of the job and the resource usage quantity variation every time the job is executed, estimates a resource usage quantity of a new job, based on resource usage quantity variations contained in an execution history of a reference job matching the new job in terms of the attribute within a predetermined degree, and specifies the information processing apparatus to be assigned the new job, based on the estimated resource usage quantity.

Abstract: A system includes a plurality of information processing apparatuses; and a management apparatus configured to: transmit Hamilton path information including a communication route information and order information indicating a position in a communication order assigned to the each of the plurality of information processing apparatuses, to each of the plurality of information processing apparatuses, and transmit a first message to one or more information processing apparatuses that are free from an abnormal condition according to the communication order, and wherein each of the plurality of information processing apparatuses is configured to: transmit a second message including information about an abnormal condition that has been detected to a next transmission destination that is free from an abnormal condition, when the first message is received, and transmit the information about an abnormal condition that has been detected to the management apparatus, when the next transmission destination fails to be ident

Abstract: An information gathering system includes: an ID gathering mechanism, provided at a transmitter side node, that generates a collective identifier from one or a plurality of individual identifiers of respective management targets, each of the individual identifiers being generated according to a state of a corresponding management target; and an ID analysis mechanism, provided at a receiver side node, that restores an individual identifier from the collective identifier and specifies a management target based on the restored individual identifier.

Abstract: An apparatus includes a shared cache memory and a controller. The shared cache memory is configured to be divided into sectors by assigning one or more ways to each sector in accordance with a reusability level of data. The controller changes a sector division ratio indicating a ratio between way counts of the divided sectors of the shared cache memory, where the way count is a number of ways assigned to each sector. When first and second jobs are being executed in parallel, in response to a designation of a program of the second job, the controller calculates the sector division ratio, based on data access amount including a size and an access count of data accessed by the first and second jobs and a volume of the shared cache memory, and changes the sector division ratio of the shared cache memory to the calculated sector division ratio.

Abstract: An information processing system comprises a processor. The processor executes a process that causes the information processing system to perform first writing, when requested to write data, data from which to subtract remainder data obtained by dividing a data size of write target data by a first data size of first processing unit data, the first data size being a size of processing unit data of a reading/writing process in a first storage device, in the write target data requested to be written to the first storage device and second writing the remainder data not being written by the first writing to a second storage device in which to set a second data size of second processing unit data, the second data size being smaller than the first data size of the first processing unit data.

Abstract: A system to which the present invention has been applied includes a plurality of information processing apparatuses connected to each other and a management device that divides a first number of pieces of management data needed for management of the plurality of information processing apparatuses into a second number of pieces of management data, the second number being equal to or greater than the first number, and that transmits the second number of pieces of management data obtained by the division respectively to the plurality of information processing apparatuses.

Abstract: An information processing system includes: plural switches; plural information processing apparatuses; and a management apparatus.

Abstract: A first information processing device holds data and a key for encryption. A second information processing device does not have rights to share data not encrypted with the first information processing device and a client. The first information processing device transmits data and key to the client when receiving a request to use the data. The first information processing device generates first encrypted data encrypted with the key, and transmits it to the second information processing device. The client transmits information obtained by encrypting the result of processing on the data with the key to the second information processing device until the use of the data ends. The first information processing device acquires second encrypted data received by the second information processing device from the second information processing device, and decrypts and stores it when notified that the use of the data has ended.

Abstract: An administration device includes a reception unit, a specifying unit, and a transmission unit. The reception unit receives a transfer request for requesting data transfer to an input-output device from an information processing device. In response to the transfer request, the specifying unit when determining that the communication path to the input-output device is already selected, specifies an information processing device or an input-output processing device, and when determining that the communication path is not selected, selects a communication path to the input-output device according to the first communication state stored in the first storage unit and the second communication state stored in the second storage unit, and specifies an information processing device or an input-output processing device. The transmission unit transmits, to the information processing device, an identifier for identifying the information processing device or the input-output device specified by the specifying unit.

Abstract: An administration device includes a reception unit, a specifying unit, and a transmission unit. The reception unit receives a transfer request for requesting data transfer to an input-output device from an information processing device. In response to the transfer request, the specifying unit when determining that the communication path to the input-output device is already selected, specifies an information processing device or an input-output processing device, and when determining that the communication path is not selected, selects a communication path to the input-output device according to the first communication state stored in the first storage unit and the second communication state stored in the second storage unit, and specifies an information processing device or an input-output processing device. The transmission unit transmits, to the information processing device, an identifier for identifying the information processing device or the input-output device specified by the specifying unit.

Abstract: A disclosed control method is executed by a node of plural nodes that are connected in a parallel computer system through a network. The control method includes obtaining property data representing a property of accesses to data stored in a storage device in a first node of the plural nodes for a job to be executed by using data stored in the storage device, and determining a resource to be allocated to a cache among resources included in the parallel computer system and the network based on the obtained property data.

Abstract: A sinker electric discharge machining apparatus for machining a workpiece by generating electric discharge in a work gap by applying a voltage having an OFF time, may include a discriminator for generating a first signal representing an abnormal state of the work gap, and a second signal representing a normal state of the work gap; and a pulse controller, in which a first extension factor and a second extension factor that is smaller than the first extension factor are set and a first reduction factor and a second reduction factor that is smaller than the first reduction factor are set. The pulse controller extends the OFF time using either the first or the second extension factor if the first signal is received. The pulse controller reduces the OFF time using either the first or the second reduction factor if the second signal is received.

Abstract: A communication method may store by a source node transmission data to be transmitted to destination nodes, create by the source node buffer information to be used by the destination nodes for receiving the transmission data, and transmitting by the source node the buffer information to the destination nodes by a first communication method that makes a multi-destination delivery using a barrier synchronization in which the destination nodes are synchronized by receiving synchronization signals from each of the destination nodes. The method may receive by the destination nodes, respectively, the transmission data using the buffer information by a second communication method that makes a one-to-one communication.

Abstract: A communication method includes reporting information that indicates disposition of communication data in a communication buffer from a first node to second nodes by a multi-destination delivery using a barrier synchronization or a reduction to all nodes. The communication data is transferred between the first node and the second nodes by at least one of collective communication methods as a node-to-node communication method used in parallel computing. The communication method transfers the communication data by the second nodes using the information that indicates the disposition of the communication data in the communication buffer.