Abstract: In response to receiving an exception indication, an exception-handling state variable in state information is asserted. Firmware instruction(s) are selected from a plurality of firmware instructions based at least in part on: (1) a conditions table that includes condition(s) for handling the plurality of firmware instructions and (2) the state information that includes the exception-handling state variable. It is determined how to handle the selected firmware instruction(s) based at least in part on: (1) the conditions table and (2) the state information that includes the exception-handling state variable where. The plurality of firmware instructions includes: (1) a non-exception-handling set of firmware instruction(s) and (2) an exception-handling set of firmware instruction(s).

Abstract: According to one embodiment, a memory system includes a non-volatile memory, and a controller configured to control the non-volatile memory. The controller is configured to write data to the non-volatile memory, read the written data from the non-volatile memory after writing of the data is completed, generate parity data corresponding to the read data, and write the generated parity data to a memory for parity storage.

Abstract: One or more aspects of the present disclosure relate to allocating virtual memory to one or more virtual machines (VMs). The one or more VMs can be established by a hypervisor of a storage device. The virtual memory can be allocated to the established one or more VMs. The virtual memory can correspond to non-volatile (NV) memory of a global memory of the storage device.

Abstract: Log processing provides a status message of a storage node cluster is obtained by a first node. The status message marks a master storage node of the storage node cluster. The first node can send a first write operation request to the master storage node based on the status message so that the master storage node agrees on a first write operation after agreeing on a received log with a slave storage node in the storage node cluster. The first node receives a feedback message sent after the master storage node agrees on the first write operation with the slave storage node in the storage node cluster. The feedback message includes identification information and a response to the first write operation request. The first node can send to the master storage node a target message including a current iteration identifier, and the master storage node can use the current iteration identifier to determine whether the target message is from a latest master compute node.

Abstract: In a data processing method, a worker node in a distributed data processing system receives first data from an upstream worker node. The first data has been stored in a buffer of the upstream worker node. The worker node sends a first portion of the first data to a persistent storage device of the distributed data processing system for persistent backup, and performs computational processing on the first data to generate second data. Prior to completing performing computational processing on the first data, the worker node sends acknowledgement information to the upstream worker node to instruct the upstream node to delete the first data from the buffer of the upstream worker node. The worker node then sends the second data to a downstream worker node in the distributed data processing system for further processing by the downstream worker node.

Abstract: A data backup method of a storage device which includes a storage controller, a buffer memory, and a plurality of nonvolatile memory devices, the method including: detecting a power-off event of an external power provided to the storage device; deactivating a host interface of the storage controller in response to the detection of the power-off event; moving data stored in the buffer memory to a static random access memory (SRAM) in the storage controller; blocking or deactivating a power of the buffer memory; setting an interleaving mode of the plurality of nonvolatile memory devices to a minimum power mode; and programming the data moved to the SRAM to at least one of the plurality of nonvolatile memory devices.

Abstract: The present disclosure provides methods, systems, and non-transitory computer readable media for efficiently storing data. The methods include segmenting a parcel of data into one or more data chunks according to a physical block size of the secondary storage unit, wherein the one or more data chunks include a partial data chunk and zero or more full data chunks; sending each full data chunk of the zero or more full data chunks to the secondary storage unit to be written to a selected physical block of the secondary storage unit; collecting, in a collection buffer, the current partial data chunk and at least another partial data chunk; and sending a combination of the current partial data chunk and a subset of the plurality of other partial data chunks to the secondary storage unit to be written to a selected physical block of the secondary storage unit, wherein said combination fills substantially all of a physical-block-sized data chunk.

Abstract: A Solid State Drive (SSD) is disclosed. The SSD may include flash memory to store data. An SSD controller may manage reading and writing data to the flash memory. The SSD may include an automatic stream detection logic to select a stream identifier responsive to attributes of data. A garbage collection logic may select an erase block and program valid data in the erase block into a second block responsive to a stream ID determined the automatic stream detection logic. The stream ID may be determined after the garbage collection logic has selected the erase block for garbage collection.

Abstract: The present technology relates to an electronic device. According to the present technology, a storage device having improved zone recovery speed may include a memory device including a plurality of memory blocks, and a memory controller configured to, in response to the zone open request, allocate memory blocks to store data of a logical address group corresponding to an open-requested zone among the plurality of memory blocks, and control the memory device to store zone recovery information included in a zone open request, and wherein the zone recovery information indicates whether data to be stored in the open-requested zone is to be recovered in a next power cycle.

Abstract: According to an embodiment, a communication apparatus includes a writing unit, a transfer control unit, a descriptor receiving unit, and a reading unit. The writing unit writes a frame in a first virtual storage area. The transfer control unit controls a timing for transferring a descriptor of the frame based on schedule information. The descriptor receiving unit receives the descriptor. The reading unit that reads the frame from a second virtual storage area specified based on the descriptor when the descriptor is received by the descriptor receiving unit.

Abstract: At least one processing device receives a create-token command from a host device. Responsive to receipt of the create-token command, the processing device creates the token, generates an in-memory snapshot of data in one or more logical address ranges of one or more source storage volumes, associates the in-memory snapshot with the token, and provides the token to the host device. The processing device receives a write-via token command from the host device, the write-via-token command specifying the token and one or more logical address ranges of one or more target storage volumes. Responsive to receipt of the write-via-token command, the processing device determines whether or not differential metadata of the storage system includes one or more entries for the one or more logical address ranges of the one or more source storage volumes, and controls execution of the write-via-token command based at least in part on the determination.

Abstract: A method, system and apparatus for protecting from out of bounds memory references, including establishing a threshold number of active objects for examination for an out of bounds memory reference, determining whether a number of active objects for an application exceeds the threshold, and when the number of active objects exceeds the threshold, storing at least part of information about the active objects in an overflow table in a memory.

Abstract: A memory device includes a first nonvolatile memory including a resistive memory cell; and a controller. The controller may be configured to provide the first nonvolatile memory with a first data, a first program command, and a first address. The controller may be configured to receive a second data, which is a verify read from the resistive memory cell programmed with the first data, from the first nonvolatile memory in response to the first program command. The controller may be configured to compare the first data with the second data to detect a number of fail cells. When the number of detected fail cells is greater than a reference value, the controller may be configured to generate a third data obtained by inversing the first data, and provide the third data to the first nonvolatile memory. The first data may include an inversion flag bit.

Abstract: Example embodiments employ a selective memory swapping system for selectively placing non-volatile memory devices of a computer system offline, e.g., for background updating, and online, for use by a computer system, whereby the background updating process includes a mechanism for performing forensics analysis and updating of offline memory devices while an alternate memory device is usable by a user of the first computer system.

Abstract: A method for preventing data overlays in a data storage system is disclosed. In one embodiment, such a method detects a write operation directed to a storage area of a data storage system. The write operation includes one or more of a format write operation and a full-track write operation. Upon detecting the write operation, the method determines a data set that is associated with the storage area. The method analyzes metadata associated with the data set to determine whether the storage area contains valid data. In the event the storage area contains valid data, the method performs a data protection operation that prevents execution of the write operation and/or logs details of the write operation. A corresponding system and computer program product are also disclosed.

Abstract: A processing device is provided which includes memory comprising data cache memory configured to store compressed data and metadata cache memory configured to store metadata, each portion of metadata comprising an encoding used to compress a portion of data. The processing device also includes at least one processor configured to compress portions of data and select, based on one or more utility level metrics, portions of metadata to be stored in the metadata cache memory. The at least one processor is also configured to store, in the metadata cache memory, the portions of metadata selected to be stored in the metadata cache memory, store, in the data cache memory, each portion of compressed data having a selected portion of corresponding metadata stored in the metadata cache memory. Each portion of compressed data, having the selected portion of corresponding metadata stored in the metadata cache memory, is decompressed.

Abstract: A control apparatus configured to record data in a recording medium includes a cluster management unit configured to manage clusters in a predetermined area in a recording area of the recording medium, a recording management unit configured to manage clusters in the predetermined area in recording units each having a predetermined size larger than each cluster size, and a directory cluster allocation unit configured to set a cluster in the predetermined area to a directory cluster in which a directory is recorded. The directory cluster allocation unit is configured to allocate a cluster out of clusters in a tail end area in the predetermined area to the directory cluster, the clusters in the tail end area being smaller than a size of the recording units having the predetermined size and being not managed by the recording management unit.

Abstract: A system and method for backing up workloads for multiple tenants of a cloud computing system are disclosed. A method of backing up workloads for multiple tenants of a computing system includes triggering an archival process according to an archival policy set by a tenant, and executing the archival process by reading backup data of the tenant stored in a backup storage device of the computer system and transmitting the backup data to an archival store designated in the archival policy, and then deleting or invalidating the backup data stored in the backup storage device.

Abstract: Systems, apparatuses, and methods related to extended memory operations are described. Extended memory operations can include operations specified by a single address and operand and may be performed by a computing device that includes a processing unit and a memory resource. The computing device can perform extended memory operations on data streamed through the computing tile without receipt of intervening commands. In an example, a computing device is configured to receive a command to perform an operation that comprises performing an operation on a data with the processing unit of the computing device and determine that an operand corresponding to the operation is stored in the memory resource. The computing device can further perform the operation using the operand stored in the memory resource.

Abstract: Methods, systems and computer program products are provided for managing protection domains (PDs) for files at a file-level or a page-level. PDs may be allocated for multiple purposes, e.g., to protect processes, files, buffers, etc. Files stored in nonvolatile memory (NVM) subject to direct access (DAX) may be protected by file-level or page-level PDs. PDs may comprise protection keys (PKEYs) with user-configurable read and write access control registers (PKRUs). NVM files may be protected from corruption (e.g. by stray writes) by leaving write access disabled except for temporary windows of time for valid writes. File PDs may be managed by a file manager while buffer PDs may be managed by a buffer pool manager. File associations between PDs, files and file address space may be maintained in a file object. Buffer associations between PDs, buffers and buffer address space may be maintained in a buffer descriptor.