A remote data replication method and a storage system, where a production array sends a data replication request to a disaster recovery array. The data replication request includes an identifier of a source object and a data block corresponding to the source object. The data block is stored in physical space of a hard disk of the production array. The disaster recovery array receives the data replication request. The disaster recovery array creates a target object when the disaster recovery array does not include an object having a same identifier as the source object. An identifier of the target object is the same as the identifier of the source object, the disaster recovery array writes the data block into the physical space.

A remote data replication method and a storage system, where a production array sends a data replication request to a disaster recovery array. The data replication request includes an identifier of a source object and a data block corresponding to the source object. The data block is stored in physical space of a hard disk of the production array. The disaster recovery array receives the data replication request. The disaster recovery array creates a target object when the disaster recovery array does not include an object having a same identifier as the source object. An identifier of the target object is the same as the identifier of the source object, the disaster recovery array writes the data block into the physical space.

Data file storage systems and methods that bind a local portable data storage device to remote data storage space with an emergent data file storage system. Data files and directory nodes are associated with data aspect pairs, each comprised of a series of interdependent blocks of characteristically high-entropy data. Blocks of data comprising a remote data aspect are transferred to remote data aspect storage locations. A single block of data comprising a local data aspect is transferred separately to the local portable data storage device. Neither a local data aspect nor a remote data aspect contains information about the corresponding data file or directory node.

A memory device includes first, second, third, and fourth memory cell groups and first and second transmitters. The first and second memory cell groups share first local lines. The third and fourth memory cell groups share second local lines. The first transmitter transmits first data to first global lines based on a read command. The first data is output from one of the first memory cell group and the second memory cell group on the first local lines. The second transmitter transmits second data to second global lines based on the read command. The second data is output from one of the third memory cell group and the fourth memory cell group on the second local lines. The number of the first global lines is different from the number of the second global lines.

The technology describes shallow memory tables, comprising data maintained at a backup node of a data storage system that contain digest information related to a main node memory table that represents a metadata tree. If the main node fails, the shallow memory table's digest information contains sufficient information to recover the failed main node's memory table data. In response to receiving an update operation at a main node, the main node updates a memory table, journals an update record in a tree-related journal, and sends a digest representing the update to a backup node, which maintains the digest in a shallow memory table. If the main node fails, the backup node transforms the shallow memory table into a memory table by using the digest information to locate the corresponding update journal records. The backup node is able to handle create, read, update and delete requests during the transformation.

A host of a storage system is coupled to multiple SSDs. Each SSD is configured with a migration cache, and each SSD corresponds to one piece of access information. The host obtains migration data information of to-be-migrated data in a source SSD, determines a target SSD, and sends a read instruction carrying information about to-be-migrated data and the target SSD to the source SSD. The source SSD reads a data block according to the read instruction from a flash memory of the source SSD into a migration cache of the target SSD. After a read instruction is completed by the SSD, the host sends a write instruction to the target SSD to instruct the target SSD to write the data block in the cache of the target SSD to a flash memory of the target SSD.

In one example, workload attributes associated with workloads running in a virtualized computing environment may be retrieved. A distance analysis may be performed using the retrieved workload attributes to generate a distance matrix that identifies a distance between each workload and each other workload. Further, a cluster analysis may be performed on the workloads based on the distance matrix to generate clusters, where each cluster may include identical workloads. Furthermore, the identical workloads in each cluster may be associated with at least one security policy to provide security services in the virtualized computing environment.

The system includes a data synchronization module and a heat data module. The data synchronization module is configured to communicate with a first storage volume and a second storage volume to provide a backup for the first storage volume by synchronizing information from the first storage volume to the second storage volume. The information includes at least one of data chunks, heat map data, and first metadata relating to the first storage volume. The heat data module is coupled to the second storage volume to read the first metadata and the heat map data and adjust a location of at least one of the data chunks in the second storage volume based on the heat map data.

A method is used in managing migration of virtual file servers. The method migrates a virtual file server from a source storage processor to a destination storage processor in a storage system. The storage system includes the source and the destination storage processors. The virtual file server comprises a root file system, a configuration file system, and a set of user file systems. The method enables concurrent access to the root file system from both source and destination storage processors during the migration until the set of user file systems is migrated from the source storage processor to the destination storage processor.

A method for execution by a dispersed storage and task (DST) processing unit includes determining a first optimal slice size requirement is determined for a first independent data element (IDE). The first IDE is split into a first plurality of IDEs based on determining the first IDE compares unfavorably to the first optimal slice size requirement. An error coding function is performed on the first plurality of IDEs to produce a set of encoded slices for each of the first plurality of IDEs for transmission to storage units. A subset of additional IDEs are selected to be merged into a merged IDE based on a second optimal slice size requirement, and continuous content of the subset of additional IDEs is concatenated to produce the merged IDE. The error coding function is performed on the merged IDE to produce a second set of encoded slices for transmission to storage units.