This application provides a data backup method. The method includes: obtaining, by a first node, an identifier of a backup execution node from a storage device; and backing up data of the first node in the storage device responsive to determining that an ID of the first node is the same as the ID of the backup execution node. The embodiments of this application can improve reliability of the data stored by the first node, and prevent a plurality of nodes from redundantly backing up duplicate data in the storage device. The techniques disclosed herein reduce resource consumption.

A method of operating a multi-core solid state drive includes: receiving an initial internal back copy command including a physical copy referencing a source Logical Page Number (LPN) and a destination LPN from a host, delaying processing of the physical copy when the physical copy requires two different flash translation layers (FTLs), and generating a modified batch internal copy command by replacing the source LPN of the physical copy with a Physical Page Number mapped to the source LPN.

Embodiments of the present disclosure a method, device and computer program product for storage management. The method comprises: determining, from a storage system, a plurality of storage areas corresponding to a plurality of files; selecting, from the plurality of storage areas, a pair of first storage area and second storage area, both the first storage area and the second storage area having non-empty available space; moving at least part of data stored in used space of the first storage area to available space of the second storage area; and in response to determining that the used space of the first storage area becomes empty after the moving, releasing the first storage area. In this way, the storage space can be effectively released and the storage efficiency is accordingly improved.

Intelligent data throttling in data movement operations, such as secondary-copy operations in a storage management system. A local throttling manager may intelligently interoperate with co-resident data agents and/or a media agent executing on any given local computing device, whether a client computing device or a secondary storage computing device. The local throttling manager may allocate and manage the available bandwidth for various jobs and their constituent data streamsacross the data agents and/or media agent. Effective bandwidth for the secondary-copy operation may be adjusted based on available bandwidth from the computing device due to increased demand for the bandwidth from other operations, such as services that may be hosted on the computing device.

An optional array in a memory includes an array having blocks each including an address word and a data word, and a boundary that is a position where a ratio between the numbers of unwritten blocks in M area and written blocks in W area is an integer ratio. The controlling process includes when a second write for writing a special value in a written block in the second area is invoked, executing a shrink process of shifting the boundary to shrink the first area; in a case where the first adjacent block at the boundary is a written block, storing an address of the first adjacent block and of a first link destination block forming a link with the write destination block in address words of the first link destination block and of the first adjacent block respectively to form a link.

Methods and systems are presented for providing data consistency in a distributed data storage system using an eventual consistency model. The distributed data storage system may store data across multiple data servers. To process a request for writing a first data value for a data field, a first data server may generate, for the first data value, a first causality chain representing a data replacement history for the data field leading to the first data value. The first data server may insert the first data value without deleting pre-existing data values from the data field. To process a data read request, multiple data values corresponding to the data field may be retrieved. The first data server may then select one data value based on the causality chains associated with the multiple data values for responding to the data read request.

A control plane for controlling transfer of data to a data plane is disclosed. In one aspect, the control plane comprises memory cells for storing a digitally coded parameter value and having a data input electrode, a data output electrode and a control electrode, n data input terminals that receive a data input value and apply it to the data input electrode of an associated memory cell, and n data output terminals coupled to a data output electrode of an associated memory cell. The control plane further comprise a first delay line having delay elements and arranged for receiving a stream of control bit values, and a second delay line having delay elements and arranged for receiving a signal for enabling the control bit values in the first delay line, wherein data is transferred in a controlled and synchronized fashion to an output electrode.

Disclosed herein are related to a controller, a method, and a system for updating mapping information between a logical address and a physical address of a corresponding region of a memory device. In one aspect, the controller generates a plurality of entries, where each entry indicates an update in the mapping information associated with the corresponding region. The controller generates a plurality of headers, where each header is associated with one or more entries in the corresponding region. The controller receives an instruction to synchronize the mapping information stored on the memory device with the update in the mapping information. The controller generates a copy of the plurality of headers in response to receiving the instruction to synchronize. The controller synchronizes the mapping information stored on the memory device according to the copy of the plurality of headers and the plurality of entries.

A method for execution by one or more processing modules of one or more computing devices of a dispersed storage network (DSN), the method begins by determining a slice name of an encoded data slice to verify, obtaining the encoded data slice and compressing the encoded data slice to produce a compressed encoded data slice, determining a storage set of DS units associated with the slice name, sending compressed encoded data slice partial request messages to the storage set of DS units, and receiving at least a decode threshold number of compressed encoded data slice partial response messages to produce compressed encoded data slice partials. The method continues by determining whether a sum of the compressed encoded data slice partials compares favorably to the compressed encoded data slice and indicating a failed test when the comparison is not favorable and indicating a passed test when the comparison is favorable.

A method for scheduling data transfer commands between a first actuator or a second actuator across an interface is disclosed. The method includes balancing data transfer commands between the first actuator and the second actuator by applying a first rule for read commands and a second rule for write commands.