Abstract: Various illustrative aspects are directed to a data storage device, method, and one or more processing devices that are configured to: select a seek time model from a plurality of seek time models based at least in part on an operational characteristic of an access command, the operational characteristic relating to an off-track susceptibility of executing the access command; determine an access time for the access command using the selected seek time model; and select a next access command for execution based on the determined access time for the access command and determined access times for other ones of a plurality of access commands.

Abstract: The present invention discloses a data access interface unit comprising: a physical storage device controller for receiving a first control signal from a first storage virtualization controller, and accordingly determining the first storage virtualization controller as the primary controller, and generating a first selection signal; a selector for receiving the first selection signal, and accordingly selecting data and signals from the first storage virtualization controller; and a clock generation circuit for providing a dedicated clock signal to the physical storage device, where when the physical storage device controller receives a re-set signal from a second storage virtualization controller, the physical storage device controller determines the second storage virtualization controller as the new primary controller, and accordingly generates a second selection signal so as to control the selector to select data and signals from the second storage virtualization controller.

Abstract: A method for execution by a storage network starts by maintaining loading and data access rate information for a storage node and estimating a future data access rate for the storage node. The method continues by determining a probability level of potential future data loss, based on the estimated future data access rate and in response to a determination that the probability level of potential future data loss compares unfavorably to a maximum probability of data loss threshold level the method continues by facilitating migration of at least a portion of data stored on the storage node for temporary storage in another storage node of the storage network.

Abstract: Snapshots with integrity can be taken of secure workspaces having distributed cache. When a snapshot of a secure workspace is to be taken, a host agent executing external to the secure workspace can instruct a workspace agent running inside the secure workspace to lock a filesystem and flush the cache within the secure workspace. The host agent can then lock the filesystem and flush the cache outside the secure workspace. The host agent may then create a snapshot of the secure workspace. After the snapshot is created, the host agent can unlock the filesystem outside the secure workspace and instruct the workspace agent to unlock the filesystem inside the secure workspace.

Abstract: Disclosed herein is a thin-provisioned multi-node computer system with a disaggregated memory pool and a pooled memory controller. The disaggregated memory pool is configured to make a shared memory capacity available to each of a plurality of compute nodes, such memory capacity being thinly provisioned relative to the plurality of compute nodes. The pooled memory controller is configured to assign a plurality of memory segments of the disaggregated memory pool to the plurality of compute nodes; identify a subset of the plurality of segments as cold segments, such identification being based on determining that a usage characteristic for each such cold segment is below a threshold; and page one or more of the cold segments out to an expanded bulk memory device, thereby freeing one or more assigned memory segments of the disaggregated memory pool.

Abstract: A data processing method in a storage system is provided. The method includes: when the storage system is under a first load, performing an inline deduplication operation; and when the storage system is under a second load, directly storing a received second data block without performing the inline deduplication operation, where the first load is less than the second load.

Abstract: A high performance packet stream storage method. Original packet data from data traffic transmitted over a network is collected. Collected original packet data is written in a memory. Metadata from the collected original package data is extracted and metadata is written in the memory. The original packet data and the metadata is stored in a storage unit.

Abstract: A memory system includes a nonvolatile memory and a controller. The controller is configured to determine a first predicted read address as a subsequent read address following an input read address from which data is to be read, based on the input read address and a preset write sequence rule, determine a second predicted read address as the subsequent read address, based on the input read address and a read sequence history, select one of read addresses including the first and second predicted read addresses as a target read address, and read data from the target read address of the nonvolatile memory.

Abstract: According to one embodiment, an information processing apparatus includes a nonvolatile memory and a CPU. The CPU stores, to the nonvolatile memory, first data, and management data including information equivalent to a write command associated with the first data and designating a first LBA range, and performs a first transmission of the write command to a memory system. When writing of second data to a second LBA range including a third LBA range that is at least a portion of the first LBA range or deallocation of the second LBA range is requested before a second response to the write command is received, the CPU transmits, to the system, a command to cancel writing to at least the third LBA range from writing of the first data to the first LBA range in accordance with the write command.

Abstract: The storage device may receive a condition for a down-time mode from the host. The storage device may cache, when the condition for the down-time mode is determined as satisfied, at least a part of update data units in the update cache. The storage device may process a read command received from the host in the down-time mode based on update data units cached in the update cache.

Abstract: A method for managing a live migration operation includes partitioning a first data structure into N sections of the first data structure, the first data structure indicating a location, associated with a source storage, having data to be copied to a target storage, and transferring less than all of the N sections of the first data structure to a migration server.

Abstract: Techniques discussed herein relate to improved data recovery techniques within cloud computing environments. The disclosed techniques utilize consistency groups that are identified for volumes corresponding to a compute instance. A plurality of resource identifiers uniquely identifying a respective cloud computing resource of the cloud computing environment can be maintained. A cloud computing instance corresponding to a resource identifier may be identified and volume metadata associated with that resource identifier is obtained. The volume metadata identifying at least one of a block volume or boot volume. A consistency group is generated for the identified volume devices for the computing instance and one or more schedules can be generated with which various snapshots of the volume devices of the group are to be subsequently generated.

Abstract: A high performance packet stream storage method. Original packet data from data traffic transmitted over a network is collected. Collected original packet data is written in a memory. Metadata from the collected original package data is extracted and metadata is written in the memory. The original packet data and the metadata is stored in a storage unit.

Abstract: A method for accessing a file in a storage system is provided. The method includes determining, for each file chunk of the file, an authority among differing storage nodes of the storage system and receiving from the authority having ownership of the file chunk, location information for the file chunk. The method includes accessing file chunks of the file as directed by each of the determined authorities.

Abstract: An embodiment may involve receiving an account identifier, wherein the account identifier is associated with a service account; transmitting a first API query to a remote computing system based on the account identifier; receiving first information associated with a first resource based on the first API query, wherein the first resource corresponds to a cloud orchestrator associated with a first service provided by the remote computing system; transmitting a first set of queries to the remote computing system based on the first information; receiving second information about a cluster of resources, associated with the first resource, based on the first set of queries, wherein a set of services related to the first service are deployed in one or more resources of the cluster of resources; generating a relationship map between the first resource and the cluster of resources based on the second information; and outputting the relationship map.

Abstract: Systems, methods, and apparatus related to memory devices. In one approach, a memory has a namespace formatted using a first sector size. Master boot record (MBR) data is written to an MBR region outside of the namespace using the first sector size. After writing the MBR data, the namespace is reformatted using a second sector size. A read command is received from a host for an address in an MBR address range of the namespace. In response to receiving the read command, the MBR data is read from the MBR region. Padding is added to the read MBR data, and the padded MBR data is sent to the host device.

Abstract: A method includes determining, by a secondary backup storage system, that a first backup operation has completed and produced a first protection copy of assets stored in a client storage array, where a primary backup storage system is used to obtain a snapshot-based backup from the client storage array and provide the snapshot-based backup to the secondary backup storage system, where the first protection copy is generated using the snapshot-based backup. The method includes identifying a second backup operation that was started before the first backup operation was started, determining that the second backup operation successfully produced a second protection copy, and generating linking metadata that links the first protection copy to the second protection copy in response to determining that the second backup operation successfully produced the second protection copy, where linking metadata is used to restore at least a portion of the assets during a restore operation.

Abstract: One or more processing units, such as a graphics processing unit (GPU), execute an application. A resource manager selectively allocates a first memory portion or a second memory portion to the processing units based on memory access characteristics. The first memory portion has a first latency that is lower that a second latency of the second memory portion. In some cases, the memory access characteristics indicate a latency sensitivity. In some cases, hints included in corresponding program code are used to determine the memory access characteristics. The memory access characteristics can also be determined by monitoring memory access requests, measuring a cache miss rate or a row buffer miss rate for the monitored memory access requests, and determining the memory access characteristics based on the cache miss rate or the row buffer miss rate.

Abstract: Methods and systems for managing persistent volumes include mounting a distributed filesystem, located outside the processing node, to a local mount point on the processing node. Access to the local mount point is given to a container on the processing node.

Abstract: Techniques and mechanisms for providing performance monitoring information. In an embodiment, a performance monitor circuit receives a communication which indicates a format comprising multiple fields which are each to store a respective count of monitored events. A programming of the performance monitor circuit, based on the communication, designates first bits and second bits of the register to provide, respectively, a first first field and a second field according to the format. Performance monitoring subsequent to the programming successively tallies a first count of first events which occur during a first period of time, and a second count of second events which occur during a second period of time. In another embodiment, performance monitoring results in the register concurrently storing both the first count and the second count.

Abstract: An apparatus and method. The apparatus including at least a processor configured to identify a plurality of tasks associated with a first resource, determine at least an assignable task of the plurality of tasks and reallocate the at least an assignable task that includes: identifying a plurality of second resources, wherein each resource includes an efficiency index corresponding to the at least an assignable task and a temporal attribute, generating an optimal reallocation as a function of the efficiency index and the temporal attribute and reallocating the at least an assignable task as a function of the optimal reallocation.

Abstract: A method of distributing data in a distributed storage system includes receiving a file, dividing the received file into chunks, and determining a distribution of the chunks among storage devices of the distributed storage system based on a maintenance hierarchy of the distributed storage system. The maintenance hierarchy includes maintenance levels, and each maintenance level includes one or more maintenance units. Each maintenance unit has an active state and an inactive state. Moreover, each storage device is associated with a maintenance unit. The determining of the distribution of the chunks includes identifying a random selection of the storage devices matching a number of chunks of the file and being capable of maintaining accessibility of the file when one or more maintenance units are in an inactive state. The method also includes distributing the chunks to storage devices of the distributed storage system according to the determined distribution.

Abstract: A deduplicated storage system is provided according to certain embodiments that uses one or more mechanisms to update the deduplication database and remove records corresponding to data blocks that have been or will be erased from the secondary copies, without using or tracking reference counting values. Some embodiments described herein use a secondary table to identify the corresponding records from the primary table that can be removed and/or moved to another table for storing “zero-reference” data blocks. In other embodiments, the system will then traverse the “zero-reference” table and remove those primary data blocks from secondary storage devices.

Abstract: Snapshots from a first LSU (R1) on a first storage system (A1) may be replicated to a second replica LSU (R2) on a second storage system (A2), for example, concurrently to remotely replicating (e.g., synchronously) write operations for R1 to R2. A process, P, on A1 executing the replication of the snapshots from R1 to R2 may be a separate process than the one or more processes on A1 executing remote replication of write operations for R1 to R2. During a consistency window on A1, outstanding write operations for R1 at the time the consistency window opened may be logged, and a pair of snapshots, SS11 and SS12 may be activated on R1 and R2, respectively. After the consistency window has closed, the SS12 snapshot metadata and snapshot data may be updated based on the outstanding write operations.

Abstract: An object tiering system transfers or tiers data objects from a data store to a cloud store. The system includes a processor and a memory having stored instructions that, when executed by the processor, cause the processor to ingest a first plurality of data objects in the data store, map a second plurality of data objects having a common tiering date to a region, and upon reaching the common tiering date, transfer the region to the cloud store. In some embodiments, the mapping is done a priori when each data object is ingested or at a first time before the common tiering date. In some embodiments, the common tiering date is a second time for transferring the second plurality of data objects from the data store to the cloud store. In some embodiments, the first plurality of objects includes the second plurality of objects.

Abstract: A middleware system and a service request result returning method are provided. The middleware system communicates with a service request end and a plurality of servers. A processor receives a plurality of service requests sent by the service request end, and writes the service requests into a service request queue. The service agent unit outputs the service requests to the servers according to the service request queue. The servers respond with a plurality of service request results to the service agent unit. The time agent unit detects the time when the processor receives the service requests, so as to write a plurality of service request end messages and a plurality of service request times of the service requests into a service request time queue. The message distributor builds a message distribution table, and outputs the service request results to the service request end according to the message distribution table.

Abstract: Data retention for a tiered ordered event stream (OES) data storage system is disclosed. Data retention can be applied to demoted data, e.g., data demoted from a first tier to a second tier of data storage devices. The data retention disclosed can avoid demoted events, generally aggregated via a chunk object, file object, etc., from being subject to both a stream-cut operation and a retention period. In embodiments, where a stream-cut instance corresponds to events occurring later in time than a retention end time (RET), all demoted events, e.g., as aggregated by a chunk, file, etc., can be affiliated with the RET. However, where the stream-cut instance corresponds to events occurring earlier in time than the RET, then a portion of the events, e.g., those that will be truncated by performing the stream-cut instance, can be demoted and affiliated with the RET.

Abstract: A zoned namespace storage device system includes a zoned namespace storage device coupled to a computing device. The zoned namespace storage device includes a zoned namespace storage subsystem that is configured to store data, and storage device compute hardware that is coupled to the zoned namespace storage subsystem and that is configured to provide a storage device operating system that includes a storage device management microservice. The storage device management microservice presents a non-zone storage service to a host subsystem in the computing device and receives, via the non-zone storage service presented to the host subsystem, a storage command from the host subsystem that is associated with a storage operation. The storage device management microservice then utilizes a zone storage service presented to the storage device management microservice by the zoned namespace storage subsystem to perform the storage operation on the zoned namespace storage subsystem.

Abstract: A processing device illustratively includes a processor coupled to a memory, and is configured to initiate a background copy process in a host device to copy data from a first storage system to a second storage system. The processing device receives input-output (IO) processing pressure feedback from at least one of the first and second storage systems, and adjusts one or more characteristics of the background copy process based at least in part on the received IO processing pressure feedback. The processing device may comprise, for example, host level mirroring (HLM) logic configured to control execution of the background copy process for one or more logical storage devices. Adjusting one or more characteristics of the background copy process based at least in part on the received IO processing pressure feedback may comprise, for example, reducing a rate of the background copy process responsive to the received IO processing pressure feedback.

Abstract: A set of host data items is received for programming to the memory subsystem. The set of host data items is programmed to a first region of the memory subsystem that includes one or more memory devices. A determination is made that a sequence at which the set of host data items are programmed across memory devices of the first region does not correspond to a target sequence associated with accessing the set of host data items via the first region. The target sequence corresponds to a sequence that enables a host data items programmed to the memory sub-system to be accessed in parallel. The set of host data items is copied from the first region to a second region of the memory subsystem. A sequence at which the set of host data items is copied to memory devices of the second region corresponds to the target sequence.

Abstract: Techniques for provisioning storage may include: initially provisioning storage for a storage group of logical devices; tagging the storage group to enable autonomous storage provisioning; receiving a plurality of parameters used in connection with performing autonomous storage provisioning for the storage group, wherein the plurality of parameters includes a first parameter denoting a threshold amount of consumed storage of the storage group, a second parameter denoting a storage capacity expansion amount by which to expand the storage capacity of the storage group, and a third parameter denoting a system-wide threshold of consumed backend non-volatile storage; determining, in accordance with the plurality of parameters, whether to expand a current storage capacity of the storage group; and responsive to determining to expand the current storage capacity of the storage group, performing first processing to automatically expand the current storage capacity of the storage group in accordance with the second pa

Abstract: Various embodiments provide block failure protection for a memory sub-system that supports zones, such a memory sub-system that uses a RAIN (redundant array of independent NAND-type flash memory devices) technique for data error-correction. For some embodiments, non-parity zones of a memory sub-system that are filling up at a similar rate are matched together, a parity is generated for stored data from across the matching zones, and the generated parity is stored in a parity zone of the memory device.

Abstract: A method, computer system, and a computer program product for storing a write data in a storage system that operates using a log-structured filing system is provided. The present invention may include compressing a write data. The present invention may also include identifying a region of a storage system based on a first size of the compressed write data. The present invention may further include the storage system operating using a log-structured filing system. The present invention may also include a different region of the storage system having a different compression ratio. The present invention may further include writing the compressed write data in the identified region of the storage system.

Abstract: Systems and methods are disclosed for implementing an event based retention schedule for a read only file. When a regular file is to be converted to an event based retention read only file, an “event-retain” property may be enabled on the file allowing the feature to be implemented. Then, that file may have its permissions changed to read only. This will allow the file to be changed to a read only file without using a default retention time. Then, once the event is triggered, the retention time may be set so the file can be scheduled for automatic deletion.

Abstract: An apparatus comprises a processing device configured to obtain information characterizing historical boot times for virtual machines associated with virtual volumes hosted on a storage cluster comprising a plurality of storage nodes, and to determine, based at least in part on the obtained information, whether any of the storage nodes has at least a threshold likelihood of experiencing a designated virtual machine boot condition during a given time period. The processing device is further configured, responsive to determining that a first one of the storage nodes has at least the threshold likelihood of experiencing the designated virtual machine boot condition during the given time period, to identify a subset of the virtual machines associated with a subset of the virtual volumes hosted on the first storage node and to move at least one of the subset of the virtual volumes to a second one of the storage nodes.

Abstract: A server, control circuit, or method for controlling an OPC UA Server includes receiving a request for data from an OPC UA Client, determining whether the request and/or the data requires a slow data access or a fast data access by a hardware implemented control circuit of the OPC UA Server; obtaining first data from a memory unit of the OPC UA Server when the request and/or the data requires the slow data access; obtaining second data from an second address space of the control circuit when the request and/or the data requires the fast data access; and sending the obtained first or second data to the OPC UA Client.

Abstract: A resource allocation method and a storage device are provided. The storage device includes a disk enclosure and a plurality of controllers. Each controller includes a plurality of processors, each processor includes a plurality of processor cores, the plurality of controllers are separately coupled to the disk enclosure including a plurality of hard disks. The plurality of processors are configured to provide computing resources. The plurality of hard disks are configured to provide storage space. Logical addresses corresponding to the storage space are classified into several address segment sets, each address segment set includes one or more address segments, some of the computing resources are allocated to each address segment set, and are used to execute a data access request for accessing an address segment comprised in the address segment set. Computing resources used to process different address segment sets are from different processors or from different processor cores.

Abstract: A block storage service analyzes customer behaviors as external signals to the health of the block storage service. In one example, using rules set by a customer for a health monitoring service, the block storage service can gain insights into what the customer cares about. The customer rules can then be used to setup internal monitors within the block storage service. If the internal monitors are triggered, the block storage service can proactively correct problems before the customer alarm thresholds are reached. For example, customer volumes can be moved to increase performance characteristics. In some cases, if the customer has too much performance capability, the customer volume can be moved to a less costly alternative.

Abstract: An example operation may include one or more of receiving data of an item from a data source, the data comprising one or more of historical data and quality data of the item, generating a cryptographic hash of the data, constructing a data block comprising the cryptographic hash of the data and a unique identifier of the item, and storing the constructed data block within a hash-linked chain of data blocks.

Abstract: Technologies are provided for dynamically changing a size of a cache region of a storage device. A storage device controller writes data to the cache region of the storage device using a particular storage format. The storage device controller then migrates the cached data to a storage region of the device, where the data is written using a different storage format. A dynamic cache manager monitors input and output activity for the storage device and dynamically adjusts a size of the cache region to adapt to changes in the input and/or output activity. The dynamic cache manager can also adjust a size of the storage region. The storage device controller can automatically detect that the storage device has dynamic cache support and configure the storage device by creating the cache region and the storage region on the device.

Abstract: A high performance packet stream storage method. Original packet data from data traffic transmitted over a network is collected. Collected original packet data is written in a memory. Metadata from the collected original package data is extracted and metadata is written in the memory. The original packet data and the metadata is stored in a storage unit.

Abstract: Methods and apparatuses to control digital data transfer via a memory channel between a memory module and a processor are disclosed. At least one of the memory module or the processor coalesces a plurality of short data words into multicast coalesced block data comprising a single data block for transfer via the memory channel. Each of the plurality of short data words pertains to one of at least two partitioned memory submodules in the memory module. The multicast coalesced block data is communicated over the memory channel.

Abstract: An information processing system determines whether the destination tenant corresponding to the source tenant is present, newly generates the destination tenant if the destination tenant is determined to be absent, and determines whether a destination resource which has the same ID as a source resource included in the source tenant is included in the tenant of the destination service. The system newly generates the destination resource in the destination tenant when the destination resource is determined not to be included in the tenant of the destination service, directly migrates data of the source resource to the destination resource if the tenant including the destination resource is the destination tenant, and migrates the data of the source resource to the destination resource via a dummy resource if the tenant including the destination resource is not the destination tenant.

Abstract: The disclosure provides techniques for deduplicating files. The techniques include, upon creating or modifying a file, placing a logical timestamp of the current logical time, within a queue associated with the directory of the file. The techniques further include placing the logical timestamp within a queue of each parent directory of the directory of the file. To determine a set of files for deduplication, the techniques disclosed herein identify files that have been modified within a logical time range. The set of files modified within a logical time is identified by traversing directories of a storage system, the directories being organized within a tree structure. If a directory's queue does not contain a timestamp that is within the logical time range, then all child directories can be skipped over for further processing, such that no files within the child directories end up being within the set of files for deduplication.

Abstract: Disclosed in some examples are methods, systems, devices, memory devices, and machine-readable mediums for using a non-defective portion of a block of memory on which there is a defect on a different portion. Rather than disable the entire block, the system may disable only a portion of the block (e.g., a first deck of the block) and salvage a different portion of the block (e.g., a second deck of the block).

Abstract: A memory controller includes a buffer memory configured to store first meta data and second meta data having a different type from the first meta data, and a cache memory including first and second dedicated areas. The first meta data is cached in the first dedicated area and the second meta data is cached in the second dedicated area.

Abstract: A method for generating data backups, that includes receiving, by a local backup manager executing on a local storage server, a command to initiate a backup process for a virtual data pool, and in response to receiving the command, identifying a plurality of locations pointing to a plurality of data, respectively, making a first determination that a first location points to a remote data stored on a remote storage server, in response to the first determination, sending a second command, to the remote storage server, to generate a remote backup data of the remote data, making a second determination that a second location points to a local data stored on the local storage server, and in response to the second determination, generating a local backup data of the local data, where the plurality of data backups includes the remote backup data and the local backup data.

Abstract: A method includes identifying a first block of a plurality of blocks stored at a first memory based on an amount of valid data of the first block, and writing the valid data of the first block from the first memory to a second memory. The first memory has a first memory type and the second memory has a second memory type different from the first memory type. The method further includes identifying a second block of the plurality of blocks stored at the first memory based on an age of valid data of the second block, determining that the age of the valid data of the second block satisfies a threshold condition, and in response to determining that the age of the valid data of the second block satisfies the threshold condition, writing the valid data of the second block from the first memory to the second memory.

Abstract: Snapshots may be remotely replicated asynchronously from a first LSU (R1) on a first storage system (A) to a second replica LSU (R2) on a second storage system (A2). The storage system A1 may open a consistency window to suspend initiating processing of new write operations received on A1. While the consistency window is open, A1 may: take a first snapshot, SS11, of R1; record, in association with the first replication cycle, an indication to replicate SS11 on A2; and initiate a next replication cycle to record write operations of the next new write requests to be received from hosts. After initiating a next replication cycle, A1 may close the consistency and transmit the first replication cycle to A2. A2 may apply the write operations of the first replication cycle to R2, and then take a second snapshot SS12 of R2, which should be a replica of SS11.

Abstract: The present disclosure includes apparatuses and methods related to a non-deterministic memory protocol. An example apparatus can perform operations on the memory device based on commands received from a host according to a protocol, wherein the protocol includes non-deterministic timing of the operations. The memory device can be a non-volatile dual in-line memory module (NVDIMM) device.