Abstract: Systems and methods for providing shared virtual memory addressing support for a host system are disclosed. In one embodiment, a graphics processor includes processing resources to perform graphics operations. A memory management unit (MMU) is coupled to the processing resources. The MMU to support a first virtual address size for managing allocation of non-shared virtual memory and to support a second virtual address size for managing allocation of shared virtual memory that is shared between the graphics processor and a host.

Abstract: A system and method for partitioned snapshot creation of caches in a distributed data grid is provided. The system and method enables a snapshot to be created in a running system without quiescing a cache service. Moreover for each particular partition, execution of read/write requests are not blocked during the period that a snapshot creation task is being performed for the particular partition. The cache service thread continues to execute read requests for all partitions with write requests for the partition under snapshot experiencing delayed response. The system and method reduces the period of time for which partitions are unavailable during a snapshot process and increases the availability of cache services provided by a distributed data grid compared to prior snapshot systems.

Abstract: Provided herein may be a storage device and a method of operating the same. The storage device may include a memory device and a memory controller. The memory device may include first memory blocks and second memory blocks. The memory controller may be configured to control the memory device so that valid data stored in a victim block, among the first memory blocks, is stored in a target block, among the second memory blocks, based on a result of a comparison between an amount of valid data stored in the victim block and a reference value. Each of the first memory blocks may include memory cells each configured to store n bits, where n is a natural number of 2 or more. Each of the second memory blocks may include memory cells each configured to store m bits, where m is a natural number less than n.

Abstract: A stripe merging method and system based on erasure codes are provided. A StripeMerge-P algorithm is used first to determine alignment information of parity chunks of erasure code stripes based on a preprocessed hash table. Through a greedy strategy, erasure code stripe pairs to be merged are selected for merging. Through the hash table, location information of the parity chunks is directly looked up, so that no additional computing overhead is required, and the overhead of selecting and merging the erasure code stripe pairs is further reduced through the combination with the greedy strategy.

Abstract: A garbage collection method is provided and applied to a data storage device. The garbage collection method includes the following steps: selecting source blocks from data blocks, wherein a total number of valid data of the source blocks is larger than or equal to a predetermined data number of a block; copying valid data of a part of the source blocks into a destination block, wherein a total number of the valid data of the part of the source blocks is smaller than the predetermined data number; copying all or a part of valid data of remaining source blocks into the destination block; updating a logical to physical addresses mapping table based on a mapping information of the destination block; and recovering all or a part of the source blocks as spare blocks.

Abstract: Apparatuses and methods related to updating data lines for data generation in, for example, a memory device or a computing system that includes a memory device. Updating data lines can include updating a plurality of data lines. The plurality of data lines can provide data form the memory array responsive to a receipt of the access command. The plurality of data lines can also be updated responsive to a determination that an access command received at a memory device is unauthorized.

Abstract: Remote memory management of the memory of a consumer computer by a producer computer is described. A system is described that can include a first computer, and a second computer communicatively coupled to the first computer via a remote direct memory access enabled communication network. The first computer can include a first operating system. The second computer can include a second operating system and a second memory. The second memory can include a plurality of buffers. The first computer can remotely manage the plurality of buffers of the second memory of the second computer without involving either the first operating system or the second operating system. The managing can further include the first computer identifying available buffers amongst the plurality of buffers. Related methods, apparatuses, articles, non-transitory computer program products, non-transitory computer readable media are also within the scope of this disclosure.

Abstract: There is provided a method and device for data replication. The method comprises: obtaining, in a network interface card, data segments by segmenting input first data; determining, in the network interface card, fingerprints corresponding to the data segments; and comparing, in a central processing unit, the fingerprints of the data segments with existing fingerprints corresponding to processed data segments, and determining, based on a result of the comparing, whether to de-duplicate the data segments corresponding to the fingerprints, to perform the data replication.

Abstract: The disclosed computing node comprises a processor and a non-transitory storage medium storing instructions executable by the processor. A method and a system are also disclosed. A subset of a plurality of conventional redo records, corresponding to received write requests, is selected based on an identical data location identifier. The conventional redo records of such selected subset are combined into a consolidated redo record. The consolidated redo record is then transmitted to a target node for processing.

Abstract: Provided are a method and an apparatus for managing a page cache in a virtualization service and a method for managing a page cache in a virtualization service according to an exemplary embodiment of the present disclosure includes: comparing a weight value of a container and a weight variable of a page possessed by a process operated by the container in the virtualization service with each other, changing the weight variable of the page based on a comparison result, and managing pages of the page cache using the changed weight variable of the page.

Abstract: A garbage collection process, wherein a system, concurrently with execution of a mutator application that modifies a heap memory computes, for each of a plurality of regions in the heap memory, an estimate indicative of a time required to evacuate the respective region. Thereafter, during a garbage collection pause having a particular pause duration, the system selects a candidate subset of memory regions for evacuation. The system merges the estimates indicative of the time required to evacuate each region of the candidate subset and determines a remaining time during the pause. The system may determine that the total estimated evacuation time to evacuate the candidate subset of regions does not exceed the determined first remaining time, and may evacuate each region in the candidate subset of memory regions for evacuation.

Abstract: Provided are a method, system, and computer program product in which a computational device stores a data structure that includes identifications of a plurality of volumes and identifications of one or more time locks associated with each of the plurality of volumes. The data structure is indexed into, to determine whether an input/output (I/O) operation from a host with respect to a volume is to be permitted.

Abstract: A method includes establishing an isolated execution environment for executing a platform firmware operating mode subroutine in a platform firmware operating mode. In response to receiving an interrupt, the platform firmware operating mode subroutine is executed in the isolated execution environment. In response to detecting an attempted access of a hardware resource resulting from execution of the platform firmware operating mode subroutine, the attempted access is blocked when the attempted access violates a security policy.

Abstract: A memory system includes a memory device including a plurality of memory blocks, and a controller in communication with the memory device to control an operation of the memory device, the controller allocating, among the plurality of memory blocks, a normal region and a redundancy region. The controller divides the normal region into a user region for storing user data, a user overprovisioning region for user data management, a map region for storing map data, and a map overprovisioning region for map data management, and divides the redundancy region into a reserved region and an additional map overprovisioning region, and wherein the reserved region, upon determination that a block in the normal region is a bad block, replaces the bad block.

Abstract: Systems and methods are disclosed herein for multithreaded access to cloud storage. An exemplary method comprises creating a plurality of mount points by mounting, by a hardware processor, a plurality of file systems on a computer system, creating an image file on each of the plurality of mount points, instantiating, for each of the plurality of mount points, a block device on the image file, creating a union virtual block device that creates one or more stripes from each block device, delegating a request for accessing the union virtual block device, received from a client, to one or more block devices and merging a result of the request from each of the one or more block devices and providing the result to the client.

Abstract: A memory system may include: a memory device including a plurality of memory dies; and a controller including a memory, and configured to: sequentially store, after storing data segments of sequential user data in the memory, the data segments of the sequential user data in the memory dies through interleaving; store in a first buffer region of the memory, after updating map segments of lower level map data corresponding to the storage of the data segments in the memory dies, the map segments of the lower level map data; and store in a second buffer region of the memory map segments of upper level map data corresponding to storage of the map segments of the lower level map data.

Abstract: In one embodiment, a solid state device includes a controller and a non-volatile memory. The non-volatile memory includes a plurality of dies. Each die includes a plurality of planes. A first super-plane-block is structured from a first plane of the plurality of dies. A second super-plane-block is structured from a second plane of the plurality of dies. A plurality of memory operation instructions that, when executed by the controller, cause the controller to receive a first data stream, write the first data stream to the first super-plane-block, receive a second data stream, and write the second data stream to the second super-plane-block.

Abstract: A processor for supporting secure memory intent is disclosed. The processor of the disclosure includes a memory execution unit to access memory and a processor core coupled to the memory execution unit. The processor core is to receive a request to access a convertible page of the memory. In response to the request, the processor core to determine an intent for the convertible page in view of a page table entry (PTE) corresponding to the convertible page. The intent indicates whether the convertible page is to be accessed as at least one of a secure page or a non-secure page.

Abstract: A system and method for utilizing slack space as another file system. The system identifies available slack space caused by storing data on a drive. The slack space is then made available as part of a separate file system. The separate file system allows for dynamic cluster sizes as the cluster size depends on the slack space of each individual file. The available space for the file system also dynamically changes based on the change in slack space caused by new data files being stored on the drive, edits to data files on the drive, or deletion of data files.

Abstract: An apparatus is provided that includes a non-volatile memory and a memory controller coupled to the non-volatile memory. The memory controller is configured to access a global address table (GAT) that maps logical addresses of a host to physical addresses of the non-volatile memory, receive a request from the host to write first data to the non-volatile memory, determine that the first data comprises fragmented data that are not aligned to a minimum write unit of the non-volatile memory, and create an unaligned GAT page, wherein the unaligned GAT page comprises a logical-to-physical mapping for the first data.

Abstract: Data address management systems, methods, devices and uses for minimizing interaction with data consumers' data on data storage devices, an embodiment comprising an external bus for communicatively interfacing the data storage system and data consumers; at least one storage medium components, each storage medium component comprising a plurality of storage locations having a unique storage location indicators; a translation layer module comprising a data address space having data addresses associable with storage location indicators; and a controller configured to store data in the storage locations and creating associations in the translation layer module between data addresses and the physical location indicators; wherein the data address space is accessible by the data consumer for addressing requests relating to data stored on the storage device and wherein the controller is configured to manipulate the arrangement of the data addresses in the data address space.

Abstract: One embodiment facilitates atomicity assurance for storing data and metadata in a data stream. The system receives a first stream of data to be written to a storage device, wherein the first stream includes a plurality of I/O requests associated with data and corresponding metadata. In response to determining that residual data associated with a preceding I/O request of the first stream exists in a data buffer: the system appends, to the residual data, a first portion of data from a current I/O request to obtain a first page of data; the system writes a remainder portion of the current I/O request to the data buffer to obtain current residual data; and the system writes the first page of data to the storage device. Thus, the system thereby facilitates atomicity assurance for storing the data and corresponding metadata of each I/O request of the first data stream.

Abstract: Apparatus and associated methods relating to data packet deparsing include an editing circuit configured to perform one or more predetermined editing operations on headers of an incoming data packet step by step without extracting all headers from the incoming data packet. In an illustrative example, an editor circuit may include an updating circuit configured to receive the data packet and update a header in the data packet. The editor circuit may also include a removal circuit configured to remove a header from the data packet. The editor circuit may also include an insertion circuit configured to insert one or more consecutive headers to the data packet. A state machine may be configured to enable or disable the updating circuit, the removal circuit, and/or the insertion circuit based on the predetermined editing operations. By using the editing circuit, packet deparsing may be performed with less hardware resources and low latency.

Abstract: Some embodiments provide a method for a packet processing pipeline of a network forwarding integrated circuit. The method stores two copies of a stateful table used by the packet processing pipeline. The stateful table is modified according to data processed by the packet processing pipeline. Upon receiving data to write to the stateful table, the method generates (i) a first copy of the received data along with an indicator for a first one of the copies of the stateful table and (ii) a second copy of the received data along with an indicator for a second one of the copies of the stateful table. The method sends the first copy of the received data into the packet processing pipeline before sending the second copy of the received data into the packet processing pipeline.

Abstract: Systems and techniques are described for optimizing memory sharing. A described technique includes grouping virtual machines (VMs) into groups including a first group; initializing a first VM in the first group, wherein initializing the first VM includes identifying, for each of one or more first memory pages for the first VM, a respective base address for storing the first memory page using an address randomization technique, and storing, for each of the one or more first memory pages, data associating the first memory page with the respective base address for the first group, and initializing a second VM while the first VM is active, wherein initializing the second VM includes determining that the second VM is a member of the first group, and in response, storing one or more second memory pages for the second VM using the respective base addresses stored for the first group.

Abstract: Recording an indicator of time at which a super block is erased, recording an indicator of time at which a first page of the super block is programmed, and recording an indicator of time at which a last page of the super block is programmed.

Abstract: Techniques are described herein for allowing a container DBMS to impose restrictions, on a per-pluggable-database basis, on operations based on the pluggable database to which the users that request the operations belong. In one embodiment, lockdown profiles can be created and mapped to pluggable databases. Lockdown profiles specify PDB-wide restrictions on operations. The restrictions may apply to all operations of a given type, may apply to specific features, may require use of specific parameter values, etc. All users that belong to a pluggable database are restricted by the restrictions specified in the lockdown profile to which their pluggable database is mapped, unless the lockdown profile has a user-specific exemption for them. Bitmaps and/or hash tables may be used to more quickly determine, at query runtime, whether a query violates any profile-specified restrictions. Execution of queries that violate any profile-specified restrictions is prevented.

Abstract: Examples described herein include systems and methods which include an apparatus comprising a memory array including a plurality of memory cells and a memory controller coupled to the memory array. The memory controller comprises a memory mapper configured to configure a memory map on the basis of a memory command associated with a memory access operation. The memory map comprises a specific sequence of memory access instructions to access at least one memory cell of the memory array. For example, the specific sequence of memory access instructions for a diagonal memory command comprises a sequence of memory access instructions that each access a memory cell along a diagonal of the memory array.

Abstract: A memory system may comprise: a memory device including a plurality of memory dies; and a controller including a first memory, Wherein the controller may store data segments of user data, corresponding to a plurality of commands received from a host, in the first memory, controls the memory device to sequentially store the data segments in the memory dies through interleaving, may update map segments of map data corresponding to storage of the data segments in the memory dies, may store the map segments in the first memory, controls the memory device to store the map segments stored in the first memory in the memory dies, and may assist the host in storing the map segments, stored in the first memory, in a second memory in the host.

Abstract: Generally, this disclosure provides systems, devices, methods and computer readable media for secure memory page mapping in a virtual machine (VM) environment. The system may include a processor configured to execute a virtual machine monitor (VMM). The VMM may be configured to maintain a table of cryptographic keys and associate a token with one of the memory pages to be mapped from a guest linear address (GLA) to a guest physical address (GPA). The token may include a key identifier (key ID) associated with one of the cryptographic keys, and an authentication code based on the GLA, the GPA, and one of the cryptographic keys. The system may also include a page walk processor configured to validate the token to indicate that the memory page associated with the token is authorized to be mapped from the GLA to the GPA.

Abstract: Systems, methods, and computer programs are disclosed for dynamically adjusting memory channel interleave granularity. An embodiment of a system comprises a plurality of memory clients, a memory management unit (MMU), and an address translator. The plurality of memory clients are electrically coupled to each of a plurality of memory channels via an interconnect. The MMU is configured to receive a request for a memory allocation request for one or more memory pages from one of the plurality of memory client and, in response, select one of a plurality of interleave granularities for the one or more memory pages. The address translator is configured to translate a physical address to interleave memory data associated with the one or more memory pages at the selected interleave granularity.

Abstract: For storing data in a storage device, a storage allocation request may be received. The storage allocation request may include a logical offset of data to be stored. Further, a chunk size of the storage device and a device offset for a free region on the storage device may be received. An offset value may be computed based on the chunk size, file system block size, the device offset, and the logical offset. A device start address, for storing the data in response to the storage allocation request, can be determined by offsetting the device offset with the offset value.

Abstract: Embodiments relate to a computer system, computer program product, and method to process complex files, and specifically, to support read and write requests of a multi-object file. Upon receipt of a file, a computer system parses the file into two or more logical objects. Each logical object has an associated or inherent characteristic. Each of the logical objects is matched to a storage tier in a multi-tier storage array. Each logical object is then assigned to a tier based on one or more object characteristics in the matched storage tier, and stored in a decomposed format. In addition, an identification of each logical object, and the object assignment, is recorded in an index.

Abstract: Techniques for determining whether processes are running on a computing device are described. As an example, a detection process may create a virtual mapping of data to memory of the computing device. The detection process may access a file system storing special files including attributes of virtual memory mappings. The detection process may analyze the attributes of the virtual memory mapping, such as an amount of data stored or shared by the memory mapping, to determine that another process is sharing the memory mapping with the detection process. The detection process may send data to a server associated with the computing device indicating that a process other than the detection process is operating on the computing device.

Abstract: The disclosed techniques include generation of a single index table when backing up data in a first backup format to a backup storage system that uses a second backup format. Using the single index table, a query for a data item can be answered by searching the single index table. The single index table avoids having to search through multiple index tables, each corresponding to a different backup format that may be used for backing up the searched data item.

Abstract: Provided are a method, system, and computer program product in which a computational device stores a data structure that includes identifications of a plurality of volumes and identifications of one or more time locks associated with each of the plurality of volumes. The data structure is indexed into, to determine whether an input/output (I/O) operation from a host with respect to a volume is to be permitted.

Abstract: A management apparatus of a multi-solid state disk (SSD) system implemented by a computer is provided. The management apparatus of the multi-SSD system may include a first SSD group including a plurality of SSDs arranged in rows or columns and configured to execute a received write command using segments in the plurality of SSDs, a second SSD group including a plurality of SSDs arranged in rows or columns and configured to execute a read command for valid data in the plurality of SSDs, and a manager configured to copy a valid page in the second SSD group while a write command for the first SSD group being executed and to erase all data in the second SSD group when the copying is completed.

Abstract: A method for DRAM protection comprises allocating address spaces respectively for a first and second common region, a first and second secure region; detecting whether common data has an address within the address spaces for the first secure region; outputting a digital signal remapping an address of the common data to the address space for the second common region if yes; detecting whether secure data has an address within the address spaces for the first common region; outputting a digital signal indicating remapping an address of the secure data to the address space for the second secure region if yes. Alternatively, the method further comprises generating a random key; an updated written data by permuting orders of bits of an original DRAM written data; generating an encrypted data by performing a function on the updated written data with the generated random key; and dynamically updating the generated random key.

Abstract: There is provided a method and device for data replication. The method comprises: obtaining, in a network interface card, data segments by segmenting input first data; determining, in the network interface card, fingerprints corresponding to the data segments; and comparing, in a central processing unit, the fingerprints of the data segments with existing fingerprints corresponding to processed data segments, and determining, based on a result of the comparing, whether to de-duplicate the data segments corresponding to the fingerprints, to perform the data replication.

Abstract: A computer storage device having a host interface, a controller, non-volatile storage media, and firmware. The firmware instructs the controller to: receive, via the host interface, a request from a host to allocate a namespace of a quantity of non-volatile memory; generate, in response to the request, a namespace map identifying a plurality of blocks of addresses having a same predetermined block size, and a partial block of addresses having a size smaller than the predetermined block size; and convert, using the namespace map, logical addresses in the namespace communicated from the host to physical addresses for the quantity of the non-volatile memory. For example, the request for allocating the namespace can be in accordance with an NVMe protocol.

Abstract: The disclosed techniques include generation of a single index table when backing up data in a first backup format to a backup storage system that uses a second backup format. Using the single index table, a query for a data item can be answered by searching the single index table. The single index table avoids having to search through multiple index tables, each corresponding to a different backup format that may be used for backing up the searched data item.

Abstract: A method for providing virtual world functionality to a user of a base virtual world having base virtual world functionality and a base world list of base virtual world users, includes providing a virtual world layer, communicating to the base virtual world that the virtual world layer will overlay the base virtual world and adding the virtual world layer to the base world list in order to register the virtual world layer with the base virtual world.

Abstract: A method for DRAM protection comprises allocating address spaces respectively for a first and second common region, a first and second secure region; detecting whether common data has an address within the address spaces for the first secure region; outputting a digital signal remapping an address of the common data to the address space for the second common region if yes; detecting whether secure data has an address within the address spaces for the first common region; outputting a digital signal indicating remapping an address of the secure data to the address space for the second secure region if yes. Alternatively, the method further comprises generating a random key; an updated written data by permuting orders of bits of an original DRAM written data; generating an encrypted data by performing a function on the updated written data with the generated random key; and dynamically updating the generated random key.

Abstract: In one embodiment of the present invention, a method includes switching between a first address space and a second address space, determining if the second address space exists in a list of address spaces; and maintaining entries of the first address space in a translation buffer after the switching. In such manner, overhead associated with such a context switch may be reduced.

Abstract: Computer-implemented methods and systems for managing data in one or more data storage media are provided. An example method may comprise creating a data structure within the data storage media. The data structure includes a plurality of memory pages, each page comprising a plurality of sessions, and each session comprising a header and a plurality of data objects. The method also comprises enabling writing data to the data storage medium, in response to routine requests, such that the data is recorded to the one or more data objects nearest the current location of a virtual cursor. When a data management operation is performed, the virtual cursor is moved within a single page in a single direction.

Abstract: Instructions and logic provide conversions between a mask register and a general purpose register or memory. Some embodiments, responsive to an instruction specifying: a destination operand, a mask length corresponding to a number of mask data fields, and a source operand; values are read from data fields in the source operand, corresponding to the specified mask length, and stored to corresponding data fields in the destination operand specified by the instruction, wherein one of the source or the destination operands is a mask register. Values indicative of masked vector elements may be stored to any data fields in the destination operand other than the number of data fields corresponding to the specified mask length. For some embodiments, the other one of the source or the destination operands may be a general purpose register or a memory location.

Abstract: Systems and methods are provided that may be implemented to securely load Unified Extensible Firmware Interface (UEFI) images (e.g., UEFI Applications, UEFI Drivers, UEFI firmware volumes, etc.) onto an information handling system from an authenticated (e.g., OEM authenticated) hardware image source device or “IO store” (e.g., such as USB device, network file system device, PCIe device, network storage, shared storage, dynamic RAM disk, etc.) based on a UEFI virtual device path that is mapped to an authenticated hardware device path that is established for the authenticated hardware image source device.

Abstract: A distributed network of storage elements (DNSE) is provided in which the physical capacity of each drive is split into a set of equal sized logical splits which are individually protected within the DNSE using separate RAID groups. To reduce restoration latency, members of the RAID groups having a member in common on a given drive are spread within the DNSE to minimize the number of sets of drives within the DNSE that have RAID members in common. By causing the splits to be protected by RAID groups, restoration of the splits may occur in parallel involving multiple drives within the DNSE. By minimizing the overlap between RAID members on various drives, failure of a given drive will not require multiple reads from another drive in the DNSE. Likewise, spare splits are distributed to enable write recovery to be performed in parallel on multiple drives within the DNSE.

Abstract: A storage apparatus includes a first storage device and a processor. The first storage device is configured to store therein first information blocks used to recover second information blocks stored in a second storage device. The processor is configured to read the first information blocks from the first storage device in an order of addresses of storage areas of the first storage device. The processor is configured to output part of the first information blocks which have been read from the first storage device to respective recovery destinations of the second information blocks to recover the second information blocks step by step.

Abstract: A file system allows a different checksum algorithm to be used for different extents of a file system object independently of other extents of the file system object. The checksum algorithm can be a selectable attribute of an extent or range of extents of a file system object, such that some extents of a file system object can use a first checksum algorithm, while other extents of the file system object can use a second checksum algorithm. An extent of the file system object also may have no associated checksum algorithm. The file system stores, for each extent of a file system object, data indicating a checksum for the extent and an indication of any checksum algorithm used for the extent.