Abstract: A method of using boot-time metadata in a storage system is provided. The method includes writing a fragmentation stride to a solid-state storage device of the storage system, the fragmentation stride defining a granularity on which fragmentation of erase blocks of the solid-state storage device occurs. The method includes allocating portions of erase blocks for at least one process in the storage system, in accordance with the fragmentation stride and writing boot up metadata at offsets that are based on the fragmentation stride, in the solid-state storage device.

Abstract: A method for selecting storage locations for storage of data. According to a placement policy, a file is stored in a database comprising a plurality of storage locations. The method includes determining a query for a copy comprising policy constraints in the placement policy and storage location constraints. The method includes extracting one or more data attributes of the file. The method includes determining an attribute set for each storage location including the data attributes and the storage location attributes for each storage location. The method includes identifying a set of one or more candidate storage locations for storage of the copy of the file by evaluating the attribute set for each storage location against the query. The method includes selecting a candidate storage location from the set and providing the copy of the file to the selected candidate storage location for storage.

Abstract: Systems, apparatuses, and methods can include a multi-stage cache for providing high reliability, availability, and serviceability (RAS). The multi-stage cache memory comprises a shadow DRAM, which is provided on a volatile main memory module, coupled to a memory controller cache, which is provided on a memory controller. During a first write operation, the memory controller writes data with a strong error correcting code (ECC) from the memory controller cache to the shadow DRAM without writing a RAID (Redundant Arrays of Inexpensive Disks) parity data. During a second write operation, the memory controller writes the data with the strong ECC and writes the RAID parity data from the shadow DRAM to a memory device provided on the volatile main memory module.

Abstract: Backing up logical data from a storage system to a backup system includes accessing data on the storage system corresponding to logical file structures of data stored on the storage system, using machine learning to ascertain file access patterns and frequency of file backups, determining backup data based on the logical file structure of data stored on the storage system and the file access patterns and frequency of file backups, and directly transferring data corresponding the backup data from the storage system to the backup system. The logical file structures may be provided by file metadata. The file metadata may include at least one of: a VTOC (volume table of contents), an IXVTOC (indexed VTOC), VSAM (virtual storage access method) information, a VVDS (VSAM volume data set), file attributes, and/or catalog data. The file attributes may include management class information for each of the files.

Abstract: Provided is a system, method, and computer program product for minimizing high resolution tape directory (HRTD) recovery time when a HRTD is invalid. A tape drive may load a tape in the tape drive. In response to receiving a write command or a read command at a beginning of tape (BOT) position, the tape drive may execute the write command or the read command without performing HRTD recovery. In response to receiving the write command or the read command at a position other than the BOT position, the tape drive may determine if the HRTD is valid. In response to determining the HRTD is not valid, the tape drive may clear a timer.

Abstract: A selected data chunk associated with an object is determined to be sent to a destination. A chunk compression grouping storing the selected data chunk associated with the object is identified. The identified chunk compression grouping includes a plurality of data chunks compressed together. A data content version that includes the selected data chunk associated with the object to be provided to the destination is determined from a plurality of data content versions based at least in part on a metric associated with the identified chunk compression grouping.

Abstract: Example storage systems, storage devices, and methods provide proactive management of storage operations using thermal states. Host storage requests are received and used to determine storage commands for a data storage device. For each storage command, a temperature index value corresponding to an estimated change in thermal state for executing the storage command may be determined. The storage commands are allocated to command queues based on the thermal index values and then executed from the command queues by the data storage device without triggering thermal throttling of storage commands.

Abstract: A method, programming product, processor, and/or system for prefetching data is disclosed that includes: receiving a request for data at a cache; identifying whether the request for data received at the cache is a demand request or a prefetch request; and determining, in response to identifying that the request for data received at the cache is a prefetch request, whether to terminate the prefetch request, wherein determining whether to terminate the prefetch request comprises: determining how many hits have occurred for a prefetch stream corresponding to the prefetch request received at the cache; and determining, based upon the number of hits that have occurred for the prefetch stream corresponding to the prefetch request received by the cache, whether to terminate the prefetch request.

Abstract: A client device includes at least one memory configured to be used at least in part as a shared cache in a distributed cache. A network interface of the client device is configured to communicate with one or more other devices on a network each configured to provide a respective shared cache for the distributed cache. A Non-Volatile Memory express (NVMe) controller of the client device receives a command from a processor to access data in the shared cache and executes a program to use data read from the shared cache or data to be written to the shared cache to perform at least one computational operation. In another aspect, data is accessed in the shared cache using a kernel and data read from the shared cache or data to be written to the shared cache is used to perform at least one computational operation by the kernel.

Abstract: Systems and methods are provided in order to avoid ingesting the entire contents of one or more data sources. An object may be associated with one or more pieces/fragments of data that can be stored in different data sources. When a request for the object is initiated, a search for those pieces/fragments of data can be performed. Nodes associated with each data source may generate data queries appropriate for its corresponding data source, retrieve, and if needed transform the data into an object-based data structure. Any pieces/fragments of data that have been discovered and retrieved can be joined, e.g., by an application programming interface server, and forwarded to a requesting client or application. In this way, only data relevant to the object is obtained. Moreover, object versioning can be employed so that the most up-to-date data is obtained.

Abstract: A copy operation is received. The copy operation is of one or more files stored on a linear tape file system. The copy operation is performed in a plurality of units of extents of the one or more files.

Abstract: In embodiments of the present invention, a processor executing a web browser detects a first request including a Hypertext Transfer Protocol (HTTP) request conveyed by the web browser to a first server for a web page including browser-executable code for a web-based application, and a response received from the first server including the requested browser-executable code, wherein the first HTTP request includes a first Uniform Resource Locator (URL). In the browser-executable code, a second request to a second server for a web resource and including a second URL is identified, and the second URL in the browser-executable code is modified so as to reference a third server. The first URL is modified so as to reference a fourth server, and the modified browser-executable code is stored on the fourth server so as to be referenced by the modified first URL.

Abstract: A computer-implemented method according to one approach includes copying data stored on a Linear Tape File System (LTFS)-based storage system to blocks of a Random Access Nonvolatile Memory (RANVM) drive. The data is copied in units of the blocks of the drive. The method further includes constructing file metadata so that the copied data on the drive is accessible as one or more files. A computer program product according to another approach includes a computer readable storage medium having program instructions embodied therewith. The program instructions are readable and/or executable by a controller to cause the controller to perform the foregoing method. A system according to another approach includes a processor, and logic integrated with the processor, executable by the processor, or integrated with and executable by the processor. The logic is configured to perform the foregoing method.

Abstract: A tool for tape library hierarchical storage management. The tool mounts a tape cartridge to a tape drive to satisfy a recall request. The tool determines there is available tape capacity on the tape cartridge to migrate data from a migration queue during recall operations. The tool sends a locate end of data (EOD) command to the tape drive. The tool receives a longitudinal position (LPOS) range returned from the tape drive. The tool determines the migration queue is within the LPOS range. The tool writes data from the migration queue to the tape cartridge within the LPOS range.

Abstract: A storage circuit includes a buffer coupled between the storage controller and the nonvolatile memory devices. The circuit includes one or more groups of nonvolatile memory (NVM) devices, a storage controller to control access to the NVM device, and the buffer. The buffer is coupled between the storage controller and the NVM devices. The buffer is to re-drive signals on a bus between the NVM devices and the storage controller, including synchronizing the signals to a clock signal for the signals. The circuit can include a data buffer, a command buffer, or both.

Abstract: An interface circuit includes; a transmitter interface circuit including an output pad and configured to receive a first input data signal and generate a second input data signal from the first input data signal, and a receiver interface circuit including an input pad and configured to receive the second input data signal via the output pad and an internal channel. The transmitter interface circuit also includes an equalization signal generation circuit configured to receive the first input data signal, generate a pulse signal by delaying the first input data signal by applying a target delay time or a target width adjustment to the first input data signal, generate an equalization signal based on the pulse signal, and provide the equalization signal to the output pad to suppress a reflected wave on the internal channel.

Abstract: The methods and systems may provide a scalable round-robin arbiter tree that performs round-robin arbitration for a plurality of requests received from a set of requestors. The round-robin arbiter may stack a plurality of round-robin cells in stages where an output of a first stage of round-robin cells is an input to a next stage of round-robin cells. The round-robin arbiter may transform an arbitration state at each stage of the arbitration and propagate the arbitration state into the next stage for arbitration. The arbitration state from the final stage round-robin cell is fed back to the first stage of the round-robin cells and used in a subsequent arbitration round.

Abstract: A versioned file system comprises a set of structured data representations. At a first time, an interface creates and exports to a cloud data store a first structured data representation corresponding to a first version of the local file system. The first structured data representation is an XML tree having a root element, one or more directory elements associated with the root element, and one or more file elements associated with a given directory element. Upon a change within the file system, the interface creates and exports a second structured data representation corresponding to a second version of the file system. The second structured data representation differs from the first structured data representation up to and including the root element of the second structured data representation. The interface continues to generate and export the structured data representations to the data store.

Abstract: Embodiments of the present disclosure provide a method, an electronic device, and a computer program product for data compression. The method includes: comparing the size of a first data packet to be compressed with a first threshold size; if the size of the first data packet is greater than the first threshold size, determining at least two second data packets from the first data packet, wherein the size of each second data packet is less than a second threshold size; and respectively compressing the at least two second data packets. In this way, the delay of data compression can be shortened.

Abstract: In one aspect of tape repositioning management in accordance with the present description, in response to loading a tape in a tape drive, mounting the tape linear tape file system (LTFS) is initiated including reading an index partition on the tape to extract metadata for mounting the tape LTFS, and prior to accessing a data area of the tape in response to any application access request, the tape is repositioned within a data partition to read a vHRTD (virtual High Resolution Tape Directory) recorded in an EOD (End of Data) portion such as an EOD data set, for example, of the data partition. The EOD portion is read to retrieve the vHRTD to facilitate application requested accesses to the tape. In one embodiment, repositioning and stopping the tape at the beginning of the data partition after reading the index partition containing metadata is bypassed.

Abstract: A device including: a processor executing a program; a first cache memory; a second cache memory belonging to a memory hierarchy lower than that of the first cache memory; a determination unit that determines, based on first information indicating a virtual address of information accessed in the second cache memory when the program is executed, second information indicating a virtual address of target information to be prefetched; and a prefetch unit that prefetches the target information and stores the prefetched target information in the second cache memory, wherein the second cache memory includes a conversion unit that converts, by using correspondence information indicating a correspondence relationship between the physical address of the target information and the virtual address of the target information, the second information into third information indicating a physical address of the target information, and the prefetch unit prefetches the target information using the third information.

Abstract: An example memory sub-system includes a memory device and a processing device, operatively coupled to the memory device. The processing device is configured to open a first block family associated with the memory device; assign a first cursor of a plurality of cursors of the memory device to the first block family; responsive to programming a first block associated with the first cursor, associate the first block with the first block family; open, while the first block family is open, a second block family associated with the memory device; assign a second cursor of the plurality of cursors of the memory device to the second block family; and responsive to programming a second block associated with the second cursor, associate the second block with the second block family.

Abstract: Systems, methods and apparatus of intelligent write-amplification reduction for data storage devices configured on autonomous vehicles. For example, a data storage device of a vehicle includes: one or more storage media components; a controller configured to store data into and retrieve data from the one or more storage media components according to commands received in the data storage device; an address map configured to map between: logical addresses specified in the commands received in the data storage device, and physical addresses of memory cells in the one or more storage media components; and an artificial neural network configured to receive, as input and as a function of time, operating parameters indicative a data access pattern, and generate, based on the input, a prediction to determine an optimized data placement scheme. The controller is configured to adjust the address map according to the optimized data placement scheme.

Abstract: A method for managing distributed storage implemented in a server includes obtaining files to be stored from a user; performing processing for distribution on the files to be stored; determine a storage requirement of the files to be stored, wherein the storage requirement can comprise file storage and object storage; storing the distributed files into a plurality of storage areas through a distributed storage unit when the storage requirement of the files to be stored is determined to be the file storage; and storing the distributed files into the plurality of storage areas through a distributed storage unit and an object storage unit when the storage requirement of the files to be stored is determined to be the file storage.

Abstract: A system may include one or more tape drives. A front portion of the one or more tape drives may be exposed to allow access to one or more respective tape cartridges of each of the one or more tape drives. The system may include one or more servers. The one or more servers may control the one or more tape drives. The system may include one or more ports communicatively connected to the one or more tape drives. Each of the one or more ports may respectively be associated with a specific sensor. Each of the specific sensors may record a specific datum. The system my include one or more power supplies.

Abstract: A storage system has a first memory, and a second memory that includes storage memory. The storage system has a processing device. The processing device is to select whether to write data to the first memory and write the data from the first memory to the second memory, or to write the data to the second memory bypassing the first memory. The processing device is to write portions of data for storage according to such selection.

Abstract: Systems, methods, and circuitries are provided for supporting distributed erasure coding in a shared file system. In one example, a method is provided to be performed by an initiator device configured to read and write data in files stored in a plurality of storage nodes that are controlled by a file management system. The method includes generating a stripe by identifying data to be stored in a storage system; dividing the data into K data segments; and performing an erasure encoding operation on the K data segments to generate a parity segment, wherein the stripe includes the K data segments and the parity segment. The method includes requesting, from the file management system, respective memory allocations in the storage devices for storing respective segments of the stripe; and transmitting, to each of the plurality of storage nodes, a respective instruction to store a respective data or parity segment in the memory allocation on the respective storage device.

Abstract: An apparatus includes a processor, configured to designate a memory region in a memory, and to issue (i) memory-access commands for accessing the memory and (ii) a conditional-fence command associated with the designated memory region. Memory-Access Control Circuitry (MACC) is configured, in response to identifying the conditional-fence command, to allow execution of the memory-access commands that access addresses within the designated memory region, and to defer the execution of the memory-access commands that access addresses outside the designated memory region, until completion of all the memory-access commands that were issued before the conditional-fence command.

Abstract: A method of managing extents of a file system having a protection pool includes collecting and initializing physical extent manager (PEM) metadata, using a PEM daemon thread. The PEM is configured to run on each of a number of nodes. The method also includes creating a request queue, using the PEM daemon thread, for all requests submitted to the PEM. The method also includes scanning the request queue, using a PEM worker thread, to handle incoming requests submitted to the PEM. The method also includes listening for multicast messages, using a PEM multicast listener thread, to be handled by the PEM worker thread.

Abstract: Automatically managing database applications, including identifying, by a management extension, an SQL server host connected to a storage system, wherein the SQL server host comprises an SQL server managing an SQL database supported by the storage system; identifying, by the management extension, the SQL database supported by the storage system based on the identified SQL server host; and scheduling, by the management extension, a backup of the SQL database.

Abstract: In a storage system such as a SAN, NAS, or storage array that implements hierarchical performance tiers based rated drive access latency, on-drive compression is used on data stored on a first tier and off-drive compression is used on data stored on a second tier. Off-drive compression is more processor intensive and may introduce some data access latency but reduces storage requirements. On-drive compression is performed at or near line speed but generally yields lower size reduction ratios than off-drive compression. On-drive compression may be implemented at a higher performance tier whereas off-drive compression may be implemented at a lower performance tier. Further, space saving realized from on-drive compression may be applied to over-provisioning.

Abstract: In an approach to adaptive tape calibration criteria based on the number of dead tracks, the number of rewrite occurrences for each dead track on a tape drive is determined. Responsive to detecting that a head is in a dead track state, the number of dead tracks is stored on the tape drive. A calibration threshold is determined, where the calibration threshold includes the number of dead track rewrites and the calibration reference value for a specific tape drive type. Responsive to the number of rewrite occurrences exceeding the calibration threshold while writing a data set, a calibration of the tape drive.

Abstract: A method of implementing object tagging framework starts with the processor receiving a tag creation command including a tag name. In response to the tag creation command, the processor creates a current tag. The processor then receives an association command, the tag name and a source object identifier. The processor determines a source object associated with the source object identifier. The source object includes a tag value. The processor associates the current tag with the source object. The processor receives a replication command including the source object and a target object. The processor causes replication of the source object to the target object that comprises replicating the current tag with the tag name and the tag value in the source object to the target object. Other embodiments are also described herein.

Abstract: A data storage system in which data storage space for storing data storage metadata is selectively allocated from non-volatile data storage devices contained in a first storage enclosure. The first storage enclosure is directly connected to at least one storage processor of the data storage system, and the data storage system further includes at least one secondary storage enclosure that is indirectly connected to the storage processor. Data storage metadata is generated within the data storage system, and the data storage metadata generated within the data storage system is stored into the data storage space that was selectively allocated for storing data storage metadata from the non-volatile data storage devices contained in the first storage enclosure.

Abstract: Various implementations described herein relate to systems and methods for providing data protection and recovery for drive failures, including receiving, by a storage device, a write request from a host operatively coupled to a storage device, and determining, by the storage device instead of the host, an XOR result by performing an XOR operation of new data and existing data. The new data is received from the host. The existing data is stored in the non-volatile storage.

Abstract: An information processing device includes a recording unit that records a plurality of objects including data and metadata related to the data on a magnetic recording medium, and executes, after recording at least one of the objects, processing of recording first set data which is a set of the metadata included in the object. The first set data is the set of the metadata included in the object recorded after recording the first set data that is recorded immediately before. The magnetic recording medium has a magnetic layer containing a ferromagnetic powder and a binding agent on a non-magnetic support. A difference between spacings S0.5 and S13.5 measured under pressures of 0.5 atm and 13.5 atm by an optical interference method after n-hexane cleaning on a surface of the magnetic layer is equal to or less than 3.0 nm.

Abstract: A network storage system operates by: sending, to at least one storage unit of a storage network, at least one read request corresponding to at least a read threshold number of a set of encoded data slices to be retrieved, wherein the set of encoded data slices correspond to a data segment, wherein the data segment is codable in accordance with dispersed error coding parameters that include a write threshold number and the read threshold number, wherein the write threshold number is a number of encoded data slices in the set of encoded data slices and wherein the read threshold number is a number of the set of slices that is required to decode the data segment; receiving from the at least one storage unit, a first subset of encoded data slices of the set of encoded data slices, wherein the first subset of encoded data slices is missing at least one missing encoded data slice from the number of the set of slices that is required to decode the data segment and that was not received from the at least one storage

Abstract: Techniques for persistent crash logging. The techniques may include making, by a monitor, a first determination that an event information file exists in a volatile storage device location in a volatile storage device. The first determination may be made after an agent event occurs. The techniques may also include performing, by the monitor, an action on a portion of the event information file to obtain a uniquely identifiable filename portion and writing, by the monitor, an event information file copy to a non-volatile storage location in a non-volatile storage device. The techniques may also include, after writing the event information file copy to the non-volatile storage location is complete, renaming, by the monitor, the event information file copy to a uniquely identifiable filename comprising the uniquely identifiable filename portion.

Abstract: Presented herein are systems and methods for backing up and restoring data from a client computing system to a provider's virtual tape library using a proxy. The proxy emulates a physical tape library that interfaces with a client's system and allowing the use of client's native tape backup commands to initiate the backup data process. The backup data is transferred into files that represent tapes in the proxy and further processed into extents in the provider's object store. The processed backup data is stored in the local cache in the object store where it is retained for future access. The backup data may also be transferred to long-term storage via a media agent that facilitate movement of the data from the local cache to secondary storage. The present disclosure also provides for creating auxiliary copies of the backed-up data using a second VTL at a second site.

Abstract: Various example embodiments for supporting flow reliability in deterministic networking are presented. Various example embodiments for supporting flow reliability in deterministic networking may be configured to support flow reliability in deterministic networking based on control over frame replication and elimination for deterministic flows. Various example embodiments for supporting flow reliability in deterministic networking based on control over frame replication and elimination for deterministic flows may be configured to control replication and elimination of redundant flows providing redundancy for deterministic flows based on dynamic activation and deactivation of the redundant flows based on monitoring of flow continuity of the deterministic flows.

Abstract: This application relates to a client-server architecture that enables file sharing between an instructor and a class. The files are stored in a storage service accessible via a network, and a separate copy of each file can be shared with each student in the class. In order to facilitate the sharing of multiple copies of the file, a share pool is created in a partition of the storage service allocated to the instructor. The share pool includes a number of stub files that are placeholders for clones of the shared file. A share handler service receives a request to share a file with a class, requests a number of stub files from the share pool, and utilizes the number of stub files to generate clones of the shared file in the partition of the storage service. Students are then granted access to the clones in the partition.

Abstract: A plurality of files are stored on magnetic tape having at least one wrap for storing data sets. Each data set includes one or more records. A number of data sets that will remain in a buffer memory after performing a read ahead operation is determined. A number of records that are likely to remain in the buffer memory after performing a read ahead operation is determined. For each record likely to remain in the buffer memory after performing a read ahead operation, positions of the records on the magnetic tape are determined. Each file of the plurality of files are classified into one group of a plurality of groups based on a position of a record corresponding with each respective file and the number of records that are likely to remain in the buffer memory after performing a read ahead operation.

Abstract: Apparatus, media, methods, and systems for data storage systems and methods for optimized scheduling of background management operations. A data storage system may comprise a controller. The controller is configured to determine a timeout value of an adaptive timeout parameter of the data storage system. The controller is configured to determine whether a first host operation is received. The controller is configured to, when the first host operation is not received, determine whether the timeout value satisfies a threshold value. The controller is configured to, when the timeout value satisfies the threshold value, cause one or more background management operations to be executed at the data storage system.

Abstract: Embodiments of the present disclosure provide a method, an electronic device, and a computer program product for data compression. The method includes: determining an amount of data to be compressed in a storage system; determining, based on the amount of the data to be compressed, a target compression level for compressing the data to be compressed; and compressing the data to be compressed according to the target compression level. In this way, it is possible to compress data to be compressed using a compression level corresponding to the amount of the data to be compressed, thereby improving the efficiency of data compression in the storage system.

Abstract: According to one embodiment, an information processing device includes a characteristics monitoring unit, a determination unit, and a notification unit. The characteristics monitoring unit monitors characteristics information that indicates at least one of its performance and lifetime with respect to a storage device, and includes input/output characteristics. The determination unit determines, based on monitored characteristics information including the input/output characteristics, whether change instruction for changing characteristics is to be notified to the storage device. The notification unit notifies the storage device of the change instruction when the determination unit determines that the change instruction is to be notified.

Abstract: Aspects for vector operations in neural network are described herein. The aspects may include a vector caching unit configured to store a vector, wherein the vector includes one or more elements. The aspects may further include a computation module that includes one or more comparers configured to compare the one or more elements to generate an output result that satisfies a predetermined condition included in an instruction.

Abstract: Various embodiments described herein provide for extending a size of a memory unit of a memory device, such as a codeword of a page of the memory device, where the memory device can be included by a memory system. In particular, some embodiments implement extending (e.g., increasing) the size of a memory unit (e.g., codeword) to store more data, such as more host data (e.g., user data) and protection data (e.g., parity data), within the memory unit while using a memory unit storage slot (e.g., codeword storage slot in a page) that is smaller in size than the extended memory unit.

Abstract: A method for managing a plurality of storage devices includes obtaining, by a storage device cleaning manager, a set of self-monitored statistics, performing an initial concern analysis to generate an initial concern prediction for each of the plurality of storage devices in a storage system, wherein the set of self-monitored statistics are associated with the plurality of storage devices, updating a cleaning policy based on the initial concern prediction, obtaining input/output (I/O) statistics, after updating the cleaning policy based on the initial concern prediction, performing a secondary concern analysis using the I/O statistics to generate a secondary concern prediction for each of the plurality of storage devices, wherein the I/O statistics are associated with the plurality of storage devices, further updating the cleaning policy, and performing a cleaning of at least a portion of the plurality of storage devices based on the updated cleaning policy.

Abstract: Methods, systems, and devices for data stream processing for media management are described. A set of transfer units of a plurality of transfer units associated with a cursor of a garbage collection procedure are selected. The selecting is based on a set of data streams corresponding to the cursor and each transfer unit of the set of transfer units is associated with a same data stream of the set of data streams. A plurality of write commands are issued in connection with the garbage collection procedure for the cursor. Each write command includes an instruction to write a transfer unit of the set of transfer units to a respective destination address of the memory sub-system.

Abstract: Only data with a high access frequency is registered to a cache storage. A cache storage stores part of data stored in a main storage. A cache management unit holds an access frequency for each cache entry in the cache storage. A candidate cache management unit holds the access frequency for each candidate entry not registered to the cache storage. A cache update unit updates the access frequency according to an address of an issued access command and updates the cache entry and the candidate entry based on the access frequency.