HITACHI VANTARA, LTD.

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.

Each of a plurality of storage controllers includes a first memory protection scheme in which logs related to the writing and updating of data in memory are generated and stored in an in-memory queue and in which the logs are extracted from the queue and written to a non-volatile storage medium. When the data in the memory is to be protected using the first memory protection scheme, the storage controller controls, according to the capacity of the logs stored in the queue, the execution of a first process for storing logs in the queue and a second process for extracting logs from the queue and writing the logs to the storage medium.

A job analysis unit analyzes a workflow of a job before starting execution of the job to specify data to be read when a calculation resource executes the job. A prefetch management unit performs control to start prefetch from a secondary storage to the primary storage for data of which no data entities exist in the primary storage and data entities exist in the secondary storage, among the data specified by the job analysis unit for the job.

A storage device includes a host interface that communicates with a host and a processor. The processor executes an asynchronous process that is a process executed asynchronously with an access process that is a process related to reading and writing of data via the host interface and is a process on data derived from data received via the host interface, selects an operation mode of one or more hardware devices of the storage device from modes including a normal mode and a power saving mode in which a power consumption amount is less than a power consumption amount of the normal mode. The processor restricts the asynchronous process and maintains the power saving mode when the operation mode is the power saving mode.

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.

A computer system includes at least one computing device and a storage device, the storage device stores video data including a plurality of frames, and at least one object is included in the frame. The computing device analyzes a motion characteristic of the object in the video data, controls execution of processing of generating annotation data indicating a position of an important object included in the frame based on a result of the analysis, and compresses the frame using the annotation data such that a data amount of a region in which the important object is present is large and a data amount of a region in which the important object is not present is small.

A backup/restore control system controls to create backup data of a volume to be backed up of a first storage system and store the backup data in a data store, and controls to store I/O statistical information related to I/O of the volume created by the first storage system while associating the backup data and the statistical information. In a case where the volume is restored using the backup data, the backup/restore control system selects a second storage system to be a restore destination of a first volume from a plurality of storage systems based on I/O statistical information, and controls to restore the volume to be restored from the backup data to the second storage system.

It is possible to alter an environment before and after transition and determine an appropriate allocation of virtual volumes. Each of a plurality of storage devices creates a virtual volume and provides the virtual volume to a host and holds a protocol endpoint as an access destination of a virtual volume and a storage container as a generation origin of a virtual volume. When a plurality of virtual volumes is caused to make a transition from a plurality of storage devices of transition origin to a plurality of storage devices of transition destination, a processor, based on a capacity and a load of each of the virtual volume groups, determines a storage device as transition destination to which a plurality of virtual volumes of a virtual volume group is caused to collectively make a transition for each of a plurality of virtual volume groups and causes the transition.

Provided is a control device which extracts summary information regarding an outline of a predetermined volume from volume mapping information regarding a configuration of a predetermined volume at a time point when each of backup images of a plurality of generations is created, and verifies whether a volume configuration based on a backup image of a specific generation corresponding to specific volume mapping information of a predetermined volume corresponding to a specific backup generation selected from the backup images of the plurality of generations on the basis of the summary information matches a volume configuration based on a current backup image of the predetermined volume, and when both the volume configurations match each other as a result of the verification, verifies and recovers backup data on the basis of the backup image of the specific generation.

A nonvolatile storage device has a permanent area and a cache data log area. A memory has a cache data area. A processor stores data related to a write request in the cache data area, stores a log header having a sequence number and data stored in the memory in a cache data log area, responds to a write request source, registers a sequence number of the log header in an invalidation table, destages the data stored in the memory to the permanent area, creates a log header having a sequence number, registers the sequence number in the invalidation table, and when the cache data log area is collected by a garbage collection method, deletes a log header having a sequence number older than the sequence number registered in the invalidation table and corresponding data from the cache data log area to release the storage area.