An information processing apparatus acquires a plurality of pieces of data having any one of a plurality of different attribute values, and performs control of recording the plurality of pieces of data in a magnetic tape in a contiguous sequence of pieces of data having one of different attribute values or data groups having different attribute values.

Embodiments for transferring data directly from primary storage to secondary storage in a virtualized network including virtual machine (VM) based storage, by exposing a source volume in the primary storage to a hypervisor host of the virtualized network, preparing a destination volume of the secondary storage as an empty volume and exporting it to the hypervisor host so that the host can the destination volume along with the source volume, and moving, in the hypervisor host, data from the exposed source volume to the exported empty destination volume using a combination of Storage Direct, Storage VMotion, and XCOPY or enhanced XCOPY technologies, wherein the XCOPY technology provides a direct transfer of data from the primary storage to the secondary storage.

A virtual memory mapping table includes snapshot instance identifiers of data volumes stored in memory regions of persistent memory. If a write operation occurs to an occupied memory region of persistent memory, a snapshot instance identifier of the write operation is compared with the snapshot instance identifier of the data stored at the memory region of persistent memory. If the snapshot instance identifiers are the same, the write operation overwrites the current version of the data at the memory region. If the snapshot instance identifiers are not the same, the write operation causes the current version of the data that is stored at the memory region of persistent memory to be written to a snapshot repository, and the new data is then written to the memory region of persistent memory. A new cache flush instruction is introduced that causes replication of existing data in persistent memory to the snapshot repository.

The present application describes embodiments of an interface for coupling flash memory and dynamic random access memory (DRAM) in a processing system. Some embodiments include a dedicated interface between a flash memory and DRAM. The dedicated interface is to provide access to the flash memory in response to instructions received over a DRAM interface between the DRAM and a processing device. Some embodiments of a method include accessing a flash memory via a dedicated interface between the flash memory and a dynamic random access memory (DRAM) in response to an instruction received over a DRAM interface between the DRAM and a processing device.

A solid state drive having a drive aggregator and a plurality of component solid state drive, including a first component solid state drive and a second component solid state drive. The drive aggregator has at least one host interface, and a plurality of drive interfaces connected to the plurality of component solid state drives. The drive aggregator is configured to generate, in the second solid state drive, a copy of a dataset that is stored in the first component solid state drive. In response to a failure of the first component solid state drive, the drive aggregator is configured to substitute a function of the first component solid state drive with respect to the dataset with a corresponding function of the second component solid state drive, based on the copy of the dataset generated in the second component solid state drive.

Embodiments of the present disclosure relate to establishing and verifying an index file. The method for establishing an index file includes: in response to receiving a data block to be stored, determining first verification information for verifying the data block and a first storage address for storing the data block. This method further includes: based on the first verification information, determining an index entry for the data block and a second storage address for storing the index entry, wherein the index entry includes the first verification information and the first storage address, and the index entry will be included in the index file. This method further includes: based on the index entry and the second storage address, determining second verification information. This method further includes: based on the second verification information and historical verification information for the index file, determining third verification information for verifying the index file.

System and method for performance control in a cloud computing environment uses dependency hierarchy between software entities executing in the cloud computing environment and operational status of each of the software entities executing in the cloud computing environment. Using the dependency hierarchy between the software entities and the operational status of each of the software entities, a scaling operation is performed to the virtual computing instances such that a service-level objective (SLO) of the cloud computing environment satisfies a predetermined threshold.

At least one processing device is configured to detect a failure event impacting at least a first storage node of a plurality of storage nodes of a distributed storage system, and responsive to the detected failure event, to modify an input-output (IO) shaping mechanism in each of the storage nodes in order to at least temporarily reduce a total number of IO operations that are concurrently processed in the distributed storage system. For example, modifying an IO shaping mechanism in each of the storage nodes illustratively comprises transitioning the IO shaping mechanism in each of the storage nodes from a first operating mode to a second operating mode that is different than the first operating mode. The second operating mode of the IO shaping mechanism illustratively has a relatively faster responsiveness to changes in IO operation latency as compared to the first operating mode of the IO shaping mechanism.

Data storage management may include configuring a stretched volume in a metro cluster configuration using a first volume and a second volume both configured as a same logical volume, L1; receiving I/O operations at the metro cluster configuration directed to L1, wherein the I/O operations include a write operations that are received at a first system of the metro cluster configuration and that write first data to the first volume; viewing values of a metric regarding data replication performed for the first volume to replicate data between systems of the metro cluster configuration for writes directed to the first volume; responsive to said viewing, determining whether the first metric values denote a problem has occurred in the metro cluster configuration at a first point in time; and responsive to determining that the problem has occurred at the first point in time, performing one or more corrective actions.

A method of labeling logic number units in a storage system results in the use of the same label for related LUNs in different storage arrays. A first storage array includes a first source logical unit number LUN, the second storage array includes a first target LUN, and the first source LUN and the first target LUN are a pair of active-active LUNs. The first storage array sends an assignable-address set of selectable labels for the first source LUN to the address assignment apparatus. The second storage array sends an assignable-address set of selectable labels for the first target LUN to the address assignment apparatus. The address assignment apparatus selects a label that is in both assignable-address sets of the first source LUN and first target LUN, and assign that selected label to both LUNs. Thereafter, the address assignment apparatus sends the selected label to the first storage array and the second storage array for identifying both the first source LUN and the first target LUN.