Abstract: One example method includes receiving, at an IO journal, a new entry that identifies a respective disk location L, and data X written at that disk location L, and determining whether a location specified in an oldest entry of the IO journal is specified in any other entries in the IO journal. When the location specified in the oldest entry is not specified in any other entries in the IO journal, adding the new entry to the IO journal, and augmenting the new entry with undo data. Or, when the location specified in the oldest entry is specified in at least one other entry in the IO journal, setting data specified in the oldest entry as undo data for the next entry that identifies that location, and adding the new entry to the IO journal, and deleting the oldest entry from the IO journal.

Abstract: In one embodiment, an apparatus comprises a source system comprising a processing device coupled to memory. The processing device is configured to obtain an IO operation corresponding to an address of the source system. The IO operation comprises first user data. The processing device is further configured to store metadata associated with the IO operation in a first journal barrier of a replication journal of the source system and to close the first journal barrier. The processing device is further configured to determine that the first user data associated with the IO operation is missing from the first journal barrier and to obtain second user data from the address. The processing device is further configured to identify an interval from the first journal barrier to a second journal barrier and to provide the first journal barrier and the interval to a destination system.

Abstract: Techniques are provided for block-level fail atomicity on byte-level non-volatile media. In one technique, an offset table and application data that stores content of a file are stored for a file. The offset table includes multiple entries, each entry being associated with a different offset value and storing a logical block address (LBA) that references a location in the application data. In response to receiving a request, that includes an input buffer and an offset value, to update the file: (a) an entry, in the offset table, that corresponds to the offset value and comprises a first LBA is identified; (b) a second LBA that is considered free is identified; (c) the second LBA is replaced with the first LBA; (d) the input buffer is written to a location, in the application data, that the second LBA references; and (e) the second LBA is added in the entry.

Abstract: Techniques and devices for managing power consumption of a memory system using loopback are described. When a memory system is in a first state (e.g., a deactivated state), a host device may send a signal to change one or more components of the memory system to a second state (e.g., an activated state). The signal may be received by one or more memory devices, which may activate one or more components based on the signal. The one or more memory devices may send a second signal to a power management component, such as a power management integrated circuit (PMIC), using one or more techniques. The second signal may be received by the PMIC using a conductive path running between the memory devices and the PMIC. Based on receiving the second signal or some third signal that is based on the second signal, the PMIC may enter an activated state.

Abstract: A method includes receiving data objects, determining a predicted lifespan of each data object, and instantiating multiple shard files. Each shard file has an associated predicted lifespan range. The method also includes writing each data object into a corresponding shard file having the associated predicted lifespan range that includes the predicted lifespan of the respective data object and storing the shard files in a distributed system. The method also includes determining whether any stored shard files satisfy a compaction criteria based on a number of deleted data objects in each corresponding stored shard file. For each stored shard file satisfying the compaction criteria, the method also includes compacting the stored shard file by rewriting the remaining data objects of the stored shard file into a new shard file.

Abstract: A synthetic full backup of a source volume representing a state of the volume at a current time is retrieved, the synthetic full having been generated by merging a full backup of the volume performed at an initial time with an incremental backup of the volume performed at the current time, after the initial time. A bitmap tracking changes to the volume made between the initial and current times is accessed. The bitmap is used to identify a location on the volume having changes made between the initial and current times. First data written to the location on the volume is read. Second data written to the same location on the synthetic full backup is read. First and second checksums are generated based on the first and second data, respectively. The checksums are compared and if any do not match, an indication is generated that the synthetic full is corrupt.

Abstract: A technological approach to management of data lifecycle includes protecting data. Datasets from distinct computing environments of an organization can be scanned to identify data elements subject to protection, such as sensitive data. Data lineage associated with the identified data elements can be determined including relationships amongst other data and linkages between computing environments or systems. The identified elements can be automatically protected based at least in part on the lineage such as by masking, encryption, or tokenization. Further, the datasets can be monitored to create audit trails for interactions with the datasets.

Abstract: Any point in time backups for distributed consistency is disclosed. IOs from a consistency group are received by multiple aggregators and stored in corresponding journals. In response to a bookmark, the multiple journals are synthesized to create a do stream or to add the multiple journals to the do stream. A full synchronization operation can be performed simultaneously with replication operations.

Abstract: An in-guest agent in a virtual machine (VM) operates in conjunction with a replication module. The replication module performs continuous data protection (CDP) by saving images of the VM as checkpoints at a disaster recovery site over time. Concurrently, the in-guest agent monitors for behavior in the VM that may be indicative of the presence of malicious code. If the in-guest agent identifies behavior (at a particular point in time) at the VM that may be indicative of the presence of malicious code, the replication module can tag a checkpoint that corresponds to the same particular point in time as a security risk. One or more checkpoints generated prior to the particular time may be determined to be secure checkpoints that are usable for restoration of the VM.

Abstract: One example method includes performing delta operations to protect data. During a delta operation, a primary map and a secondary map are processed using bit logic. The bit logic determines how to handle data stored at a location on the volume associated with an entry in the primary map and included in the current delta operation when a new write for the same location is received as the corresponding entry in the primary map is processed.

Abstract: Memory having internal processors, and methods of data communication within such a memory are provided. In one embodiment, an internal processor may concurrently access one or more banks on a memory array on a memory device via one or more buffers. The internal processor may be coupled to a buffer capable of accessing more than one bank, or coupled to more than one buffer that may each access a bank, such that data may be retrieved from and stored in different banks concurrently. Further, the memory device may be configured for communication between one or more internal processors through couplings between memory components, such as buffers coupled to each of the internal processors. Therefore, a multi-operation instruction may be performed by different internal processors, and data (such as intermediate results) from one internal processor may be transferred to another internal processor of the memory, enabling parallel execution of an instruction(s).

Abstract: The present disclosure relates to a data snapshot method and apparatus, a computer device and a storage medium. The method includes: acquiring the capacity of to-be-written data after snapshot, and comparing the capacity of the to-be-written data with a preset capacity; when the capacity of the to-be-written data is greater than or equal to the preset capacity, writing the to-be-written data into a snapshot volume in a Redirect On Write manner; when the capacity of the to-be-written data is less than the preset capacity, writing the to-be-written data into a solid state drive in a Redirect On Write manner; and when a background write-back thread detects that there is data writing into the solid state drive, writing corresponding data in a source volume into the snapshot volume in a Copy On Write manner, and writing the to-be-written data in the solid state drive into the source volume.

Abstract: A host stores “context” metadata for logical block addresses (LBAs) in a manner tied to physical location. Notwithstanding log-structured or copy on write processes, the host is then provided with immediate context when the host is called upon to assist a memory controller with data identified by physical location, for example, for memory reconfiguration, garbage collection, wear leveling or other processes. The metadata for example can provide the host with insight as to which data may be moved to enhance performance optimization and where that data can be placed. In one embodiment, the host writes back one or more references that span multiple layers of indirection in concert with write of the underlying data; in another embodiment, the context can point to other metadata.

Abstract: Methods and systems for using a hierarchical consistency group (CG) in a storage system are provided. A parent CG is associated with at least a first child CG having a plurality of storage volumes. An atomic application programming interface (API) provisions the parent CG and the first child CG by allocating storage and storing policies for the parent CG and the first CG. A storage service selected from a backup service, a replication service and a cloning service for the parent CG and the first CG is executed based on the stored policies.

Abstract: A method and apparatus for expanding cloud volume, and a device and a readable medium are provided. The method includes: determining whether there is an request of a host in a cloud volume and confirming a snapshot started during cloud backup (S1); in response to there being no IO request, expanding a snapshot volume of the snapshot started during the cloud backup and the cloud volume (S2); expanding a bitmap of the snapshot started during the cloud backup, and setting a bitmap obtained by expanding as a first preset value (S3); after completion of a cloud backup task, expanding a snapshot volume of an another snapshot that is not started in the cloud backup (S4); and expanding a bitmap of the another snapshot that is not started in the the present cloud backup, and setting a bitmap obtained by expanding as a second preset value (S5).

Abstract: A system for read-access of a regulated system, the system comprising a specialized data store, at least one memory, and a flexible reader. The specialized data store able to receive at least a portion of a set of procedures that define a respective set of systematic data and executable operations. The at least one memory including at least one set of data related to the set of procedures.

Abstract: Techniques are provided for a layout format for compressed data. A first set of data blocks are grouped into a first group based upon a first frequency of access to the first set of data blocks. A second set of data blocks are grouped into a second group based upon a second frequency of access to the second set of data blocks. The first set of data blocks are compressed into a first compression group using a first compression algorithm. The second set of data blocks are compressed into a second compression group using a second compression algorithm.

Abstract: A computer-implemented method according to one embodiment includes identifying data to be transferred as part of a point-in-time snapshot copy operation; setting a data consistency application in an idle state; marking the data while the data consistency application is in the idle state; restarting the data consistency application; identifying, by the data consistency application, the marked data; creating, by the data consistency application, a consistency group including the marked data; and performing replication of the consistency group.

Abstract: A request to access data at an address is received from a host system. A tag associated with the address is determined to not be found in first entries in a first content-addressable memory (CAM) or in second entries in a second CAM. Responsive to determining that the tag is not found in the first entries or in the second entries, a particular entry of the first entries that each includes valid data is selected. A determination is made whether the particular entry satisfies a condition indicating that content in the particular entry is to be stored in the second CAM. The content is associated with other data stored in the cache. Responsive to determining that the condition is satisfied, the content of the particular entry is stored in one of the second entries to maintain the data in the cache.

Abstract: A storage device is disclosed. The storage device may include storage to store data, which may include a first storage of a first type and a second storage of a second type. The storage device may support a number of device streams, some of which associated with the first storage and some associated with the second storage. The storage device may also include a streaming capabilities analyzer that may inventory the streaming capabilities for the storage device. Finally, the storage device may include a transmitter to transmit the streaming capabilities of the storage device to a storage manager.