Provided are a computer program product, system, and method for maintaining data structures in a virtual memory comprised of a plurality of heterogeneous memory devices. Access counts are maintained for a plurality of data structures stored in a first level memory device. A determination is made of data structures in the first level memory device having lowest access counts. The determined data structures are deleted from the first level memory device and retaining copies of the data structures in a second level memory device, wherein the first level memory device has lower latency than the second level memory device.

A synchronous destage process is used to move data from shared global memory to back-end storage resources. The synchronous destage process is implemented using a client-server model between a data service layer (client) and back-end disk array of a storage system (server). The data service layer initiates a synchronous destage operation by requesting that the back-end disk array move data from one or more slots of global memory to back-end storage resources. The back-end disk array services the request and notifies the data service layer of the status of the destage operation, e.g. a destage success or destage failure. If the destage operation is a success, the data service layer updates metadata to identify the location of the data on back-end storage resources. If the destage operation is not successful, the data service layer re-initiates the destage process by issuing a subsequent destage request to the back-end disk array.

Shielding a storage device of a storage system from one or more storage performance enhancement procedures (SPEPs) is disclosed. A SPEP can be regarded as a procedure that manipulates data stored via a storage device in a manner that attempts to improve performance of the storage system. As such, SPEPs are generally distinct from basic reading and writing of data that is not associated with storage system performance optimization. A SPEP can typically be effectively run without storage device performance degradation, however some conditions, such as very full drives, etc., can result in substantial storage device performance degradation where one or more SPEP is performed. As such, shielding can restrict permission to perform one or more SPEPs at a storage device expected to, or actually experiencing, a threshold level of performance degradation. Shielding is distinct from conventional techniques marking a drive as failed, failing, etc., as is disclosed herein.

The present disclosure includes apparatuses and methods for data movement. An example apparatus includes a memory device that includes a plurality of subarrays of memory cells and sensing circuitry coupled to the plurality of subarrays. The sensing circuitry includes a sense amplifier and a compute component. The memory device also includes a plurality of subarray controllers. Each subarray controller of the plurality of subarray controllers is coupled to a respective subarray of the plurality of subarrays and is configured to direct performance of an operation with respect to data stored in the respective subarray of the plurality of subarrays. The memory device is configured to move a data value corresponding to a result of an operation with respect to data stored in a first subarray of the plurality of subarrays to a memory cell in a second subarray of the plurality of subarrays.

A copy of files of a primary storage system are stored at a secondary storage system. The metadata associated with the copy of the files of the primary storage system stored at the secondary storage system are analyzed to determine at least a portion of a hierarchical storage tier management plan for the primary storage system including by identifying one or more files to be migrated from a first tier of storage of the primary storage system to a different storage tier. An implementation of at least a portion of the hierarchical storage tier management plan is initiated.

A storage system in one embodiment comprises storage nodes, an address space, address mapping sub-journals and write cache data sub-journals. Each address mapping sub-journal corresponds to a slice of the address space, is under control of one of the storage nodes and comprises update information corresponding to updates to an address mapping data structure. Each write cache data sub journal is under control of the one of the storage nodes and comprises data pages to be later destaged to the address space. A given storage node is configured to store write cache metadata in a given address mapping sub journal that is under control of the given storage node. The write cache metadata corresponds to a given data page stored in a given write cache data sub-journal that is also under control of the given storage node.

A system includes a solid-state storage array having a plurality of solid-state storage devices and a storage controller coupled to the solid-state storage array, the storage controller including a processing device, the processing device to determine that a first allocation unit has a first portion occupying a first plurality of erase blocks and a second portion sharing a second erase block with a portion of a second allocation unit. The processing device is further to relocate data of the portion of the second allocation unit sharing the second erase block with the second portion of the first allocation unit to another erase block and in response to relocating the data of the portion of the second allocation unit, reclaim the first plurality of erase blocks and the second erase block.

A performance manager (400, 500) and a method (200) performed thereby are provided, for managing the performance of a logical server of a data center. The data center comprises at least one memory pool in which a memory block has been allocated to the logical server. The method (200) comprises determining (230) performance characteristics associated with a first portion of the memory block, comprised in a first memory unit of the at least one memory pool; and identifying (240) a second portion of the memory block, comprised in a second memory unit of the at least one memory pool, to which data of the first portion of the memory block may be migrated to apply performance characteristics associated with the second portion. The method (200) further comprises initiating migration (250) of the data to the second portion of the memory block.

An apparatus and method for processing sensitive data. The apparatus includes one or more processors and executable memory for storing at least one program executed by the one or more processors. The at least one program is configured to, in an unprotected data area, read sensitive data from a storage device and transmit the same to a protected data area using the sensitive-data storage endpoint of the protected data area; to, in the protected data area, process the sensitive data using at least one endpoint when a command for a sensitive-data service requested by a client device is received from the unprotected data area; and to, in the unprotected data area, transmit the result of processing the sensitive data to the client device.

An apparatus for detecting a battery discharge cause for a vehicle includes a communicator connected to and configured to communicate with a plurality of controllers, and a monitor configured to monitor a communication state of the controllers to detect a battery discharge cause through the communicator. The monitor monitors the communication state of the controllers to check whether a controller in a communication-enabled state is present when the plurality of controllers is in a state of always-on power (power B+). The monitor checks whether the controller is maintained in the communication-enabled state until a preset amount of time elapses when a controller in a communication-enabled state is present. The monitor detects a communication non-sleep controller based on the controller maintained in the communication-enabled state until the preset amount of time elapses.