Abstract: A secondary storage system connected to a primary storage system including a plurality of primary logical volumes in which data is stored, the secondary storage system including: a plurality of storage nodes, each storage node including at least one secondary logical volume; and an arrangement control unit configured to, when there are a plurality of pairs of the primary logical volumes and the secondary logical volumes belonging to the same consistency group, distribute and arrange the secondary logical volumes of the plurality of pairs in the plurality of storage nodes, respectively, based on the number of the pairs and the number of the plurality of storage nodes.

Abstract: To shorten the duration affecting the performance of a storage system, even when a consistency group including multiple journal groups is used, a first storage system performs journaling at least when data is written to a data volume. It defines at least one consistency group comprising several journal groups across multiple storage nodes. When the usage rate of any journal volume within these consistency groups exceeds a predetermined threshold, the system traces to identify the specific journal group to which the journal volume belongs and determines the associated consistency group. Subsequently, it identifies at least one journal volume within this consistency group and expands its capacity in bulk.

Abstract: A management system manages one or more infrastructures, and a processor of the management system executes a plurality of consecutive processes on the infrastructure in response to a request, determines whether an error occurs during execution of the plurality of consecutive processes, selects a handling based on at least one of a classification of the error, an execution status of the processes, and a preset handling start condition when the error occurs, and executes the selected handling.

Abstract: A hub is provided for a human-powered vehicle. The hub includes a hub axle, a first rotating body, a second rotating body, a first ratchet member, a second ratchet member and a slider. The first rotating body and the second rotating body are rotatably mounted on the hub axle. The first ratchet member rotates with the first rotating body. The second ratchet member rotates with the second rotating body. The slider rotates with the first rotating body and slide with respect to the second rotating body in a circumferential direction. The slider has a first contact surface in sliding contact with an axially facing surface of the second ratchet member. The slider has a second contact surface in sliding contact with a radially facing surface of the second ratchet member.

Abstract: A limited reflection type sensor which irradiates exit light from a light emitting unit toward an object sensing region through an exit light lens and receives, at a light receiving unit, reflected light from an object existing in the object sensing region through a reflected light lens, may include a casing including a latching portion formed on a side surface and a first opening facing the object sensing region, the casing accommodating the light emitting unit and the light receiving unit; and a lens part including a light incident/exit part formed integrally with the exit light lens and the reflected light lens, and a side surface covering part in which an end of the light incident/exit part is extended along the side surface, in which the lens part covers the first opening with the light incident/exit part and the side surface covering part is latched by the latching portion.

Abstract: A management device manages one or more platforms, each having a storage device including one or more volumes, and stores: a policy table defining a policy concerning a volume as a resource and a copy policy concerning copy to define an operation of copying data to the resource; an operation origin table defining an operation origin in the platform where the operation is performed; and a state table for maintaining states of the operation origin. The processor extracts a combination of the resource and the operation from a combination of the policy concerning the volume and the policy concerning the copy. The processor identifies the operation origin from the combination of the resource and operation and determines whether the operation origin is normal, and determines whether the combination of the policies concerning the volume and the copy causes a failure on the operation origin determined to be abnormal.

Abstract: A system managing apparatus decides a time optimum for executing data copying from a copy source volume to a copy destination volume, and manages an RPO requirement of a user and a quiescing time period for each application at the time of a copy start. The system managing apparatus calculates a copy execution time and a copy execution interval such that data in which application consistency is maintained can be acquired at an interval that satisfies the RPO. In addition, the system managing apparatus monitors the use status of an application and the use status of a copy line after the start of copy operation, and calculates a copy execution time and a copy execution interval that allow a return to an appropriate recovery point, taking into consideration an application quiescing time period and a period of time required for copy completion that change in real time.

Abstract: A limited reflection type sensor which irradiates exit light from a light emitting unit toward an object sensing region through an exit light lens and receives, at a light receiving unit, reflected light from an object existing in the object sensing region through a reflected light lens, may include a casing including a latching portion formed on a side surface and a first opening facing the object sensing region, the casing accommodating the light emitting unit and the light receiving unit; and a lens part including a light incident/exit part formed integrally with the exit light lens and the reflected light lens, and a side surface covering part in which an end of the light incident/exit part is extended along the side surface, in which the lens part covers the first opening with the light incident/exit part and the side surface covering part is latched by the latching portion.

Abstract: Dynamic establishment of polling periods for virtual machine switching operations is disclosed. An example of a process includes assigning a thread for a virtual machine (VM) to a virtual processor assigning the thread to a physical processor for processing; upon determining that the virtual processor is idle, dynamically determining a guest polling time value and performing polling of the virtual processor; and, upon receiving an interrupt prior to reaching the determined guest polling time value, returning the thread to processing. An example may further include receiving a VM exit at a virtual machine monitor (VMM); switching from the VM to VMM operation; dynamically determining a KVM (Kernel-based Virtual Machine) polling time value for the thread and performing polling of the virtual processor; and, upon receiving an interrupt prior to reaching the determined KVM polling time value, returning the thread to processing.

Abstract: Techniques for migration of a source protected virtual machine from a source platform to a destination platform are descried. A method of an aspect includes enforcing that bundles of state, of a first protected virtual machine (VM), received at a second platform over a stream, during an in-order phase of a migration of the first protected VM from a first platform to the second platform, are imported to a second protected VM of the second platform, in a same order that they were exported from the first protected VM. Receiving a marker over the stream marking an end of the in-order phase. Determining that all bundles of state exported from the first protected VM prior to export of the marker have been imported to the second protected VM. Starting an out-of-order phase of the migration based on the determination that said all bundles of the state exported have been imported.

Abstract: A management system manages one or more infrastructures, and a processor of the management system executes a plurality of consecutive processes on the infrastructure in response to a request, determines whether an error occurs during execution of the plurality of consecutive processes, selects a handling based on at least one of a classification of the error, an execution status of the processes, and a preset handling start condition when the error occurs, and executes the selected handling.

Abstract: A system managing apparatus decides a time optimum for executing data copying from a copy source volume to a copy destination volume, and manages an RPO requirement of a user and a quiescing time period for each application at the time of a copy start. The system managing apparatus calculates a copy execution time and a copy execution interval such that data in which application consistency is maintained can be acquired at an interval that satisfies the RPO. In addition, the system managing apparatus monitors the use status of an application and the use status of a copy line after the start of copy operation, and calculates a copy execution time and a copy execution interval that allow a return to an appropriate recovery point, taking into consideration an application quiescing time period and a period of time required for copy completion that change in real time.

Abstract: A hub assembly comprises a hub axle, a hub shell, a sprocket support body, a first ratchet member, a second ratchet member, and a spacer. The spacer includes at least one base member and at least one axial projection. The at least one axial projection extends from the at least one base member in an axial direction. The at least one axial projection is at least partially provided between at least one first tooth and at least one second tooth in a circumferential direction. A first axial tooth-end is closer to an axial center plane of the hub assembly than a second axial tooth-end. The at least one base member of the spacer is disposed at a location closer to the first axial tooth-end than the second axial tooth-end.

Abstract: Techniques for migration of a source protected virtual machine from a source platform to a destination platform are descried. A method of an aspect includes enforcing that bundles of state, of a first protected virtual machine (VM), received at a second platform over a stream, during an in-order phase of a migration of the first protected VM from a first platform to the second platform, are imported to a second protected VM of the second platform, in a same order that they were exported from the first protected VM. Receiving a marker over the stream marking an end of the in-order phase. Determining that all bundles of state exported from the first protected VM prior to export of the marker have been imported to the second protected VM. Starting an out-of-order phase of the migration based on the determination that said all bundles of the state exported have been imported.

Abstract: A management apparatus including a storage device configured to store restoration rules which define a plurality of patterns relating to the restoration in a restoration configuration indicating a copy source and a copy destination of the data, and backup configuration information relating to the backup source and the backup destination of the data, the management apparatus executes: specification processing of specifying restoration target data; selection processing of selecting a specific restoration rule from the restoration rules; and generation processing of generating, by referring to the backup configuration information, in a restoration configuration of the restoration target data in which the backup source of the restoration target data specified by the specification processing is the copy destination and the backup destination of the restoration target data is the copy source, a restoration pattern of the restoration target data in accordance with the specific restoration rule selected by the select

Abstract: Upon acquiring target business specifying information for specifying a target business, disaster recovery (DR) operation phase determination processing of calculating an operation phase is executed based on copy configuration information for managing a pair configuration of a target business use volume and a copy volume and a copy status table for managing a copy status in the target business use volume and the copy volume, a disaster pattern corresponding to a disaster situation of a volume of a disaster target having been damaged is calculated in accordance with an operation phase calculated by the DR operation phase determination unit, and a cloud use fee is calculated for each disaster pattern from a failure occurrence to completion of system recovery of a use site where a use volume is created.

Abstract: A hub is provided for a human-powered vehicle. The hub includes a hub axle, a first rotating body, a second rotating body, a first ratchet member, a second ratchet member and a slider. The first rotating body and the second rotating body are rotatably mounted on the hub axle. The first ratchet member rotates with the first rotating body. The second ratchet member rotates with the second rotating body. The slider rotates with the first rotating body and slide with respect to the second rotating body in a circumferential direction. The slider has a first contact surface in sliding contact with an axially facing surface of the second ratchet member. The slider has a second contact surface in sliding contact with a radially facing surface of the second ratchet member.

Abstract: A hybrid cloud system includes a management server, a storage of a source-side data center serving as a remote copy source, and a storage by a cloud service provided from a target-side data center serving as a backup destination. The management server is configured to make a request for a disaster recovery configuration using the storage by the cloud service, based on a recovery time objective requirement related to a recovery time objective, a recovery point objective requirement related to a recovery point objective, and a recovery level objective requirement related to a recovery level objective.

Abstract: A management device executes an acquisition process of acquiring configuration management information including at least the first storage region and the second storage region; an extraction process of extracting, from the cost calculation rule table, the cost calculation formula in the second storage region included in the configuration management information acquired in the acquisition process; a first calculation process of calculating a cost estimate value by the cost calculation formula by acquiring, from the performance/capacity history table, a value to be substituted in as a variable of the cost calculation formula; a creation process of creating a cost estimate result including a cost estimate value calculated in the first calculation process, the first storage region, the second storage region, and the type of the usage configuration using the second storage region; and an output process of outputting the cost estimate result created in the creation process.

Abstract: A management device executes an acquisition process of acquiring configuration management information including at least the first storage region and the second storage region; an extraction process of extracting, from the cost calculation rule table, the cost calculation formula in the second storage region included in the configuration management information acquired in the acquisition process; a first calculation process of calculating a cost estimate value by the cost calculation formula by acquiring, from the performance/capacity history table, a value to be substituted in as a variable of the cost calculation formula; a creation process of creating a cost estimate result including a cost estimate value calculated in the first calculation process, the first storage region, the second storage region, and the type of the usage configuration using the second storage region; and an output process of outputting the cost estimate result created in the creation process.