Enabling multi-channel communications between controllers in a storage array, including: creating a plurality of logical communications channels between two or more storage array controllers; inserting, into a buffer utilized by a direct memory access (‘DMA’) engine of a first storage array controller, a data transfer descriptor describing data stored in memory of the first storage array controller and a location to write the data to memory of a second storage array controller; retrieving, in dependence upon the data transfer descriptor, the data stored in memory of the first storage array controller; and writing, via a predetermined logical communications channel, the data into the memory of the second storage array controller in dependence upon the data transfer descriptor.

A server system may include a cluster of multiple computers that are networked for high-speed data communications. Each of the computers has a remote direct memory access (RDMA) network interface to allow high-speed memory sharing between computers. A relational database engine of each computer is configured to utilize a hierarchy of memory for temporary storage of working data, including in order of decreasing access speed (a) local main memory, (b) remote memory accessed via RDMS, and (c) mass storage. The database engine uses the local main memory for working data, and additionally uses the RDMA accessible memory for working data when the local main memory becomes depleted. The server system may include a memory broker to which individual computers report their available or unused memory, and which leases shared memory to requesting computers.

A client application cache access profile is created that documents accesses over time to data cached within an in-memory data grid (IMDG) cache by each of a set of client applications that utilize the IMDG. A new data request is received from one of the set of client applications that includes a client-application data caching vote that specifies whether the requesting client application wants the newly-requested data cached. In response to an IMDG cache data miss related to the new data request, a determination is made as to whether to cache the newly-requested data based upon analysis of the client application cache access profile of the client application from which the new data request was received, IMDG system performance cache costs of caching the newly-requested data, and the client-application data caching vote. The newly-requested data is cached within the IMDG cache in response to determining to cache the newly-requested data.

A method for execution by a dispersed storage and task (DST) client module includes issuing a read threshold number of read slice requests are issued to storage units of the set of storage units. One or more encoded slices of a selected read threshold number of encoded slices are received. When a next encoded data slice of a decode threshold number of encoded data slices is received within a response timeframe, outputting of the next encoded data slice is initiated. When the next encoded data slice is not received within the response timeframe, receiving of another decode threshold number of encoded slices of the set of encoded slices is facilitated. The other decode threshold number of encoded slices are decoded to produce recovered encoded data slices, where the recovered encoded data slices includes at least a recovered next encoded data.

Outputting of the recovered next encoded data slice is initiated.

The present disclosure relates to systems, methods, and computer-readable media for managing tracked memory usage data and performing various actions based on memory usage data tracked by a memory controller on a memory device. For example, systems described herein involve collecting and compiling data across one or more memory controllers to evaluate characteristics of the memory usage data to determine hotness metric(s) for segments of a memory resource. The systems described herein may perform a variety of segment actions based on the hotness metric(s). In addition, the systems described herein can compile the memory usage data according to one or more access granularities. This compiled data may further be shared with multiple accessing agents in accordance with access resolutions of the respective accessing agents.

A controller, for use in a storage device of a data processing system, includes a host interface, a memory interface and one or more processors. The host interface is configured to communicate over a computer network with one or more remote hosts of a data processing system. The memory interface is configured to communicate locally with a non-volatile memory of the storage device. The one or more processors are configured to manage local storage or retrieval of media objects at the non-volatile memory, and to perform additional tasks that are not associated with management of storage or retrieval of the objects.

The present disclosure relates to systems, methods, and computer-readable media for tracking memory usage data on a memory controller system and providing a mechanism whereby one or multiple accessing agents (e.g., computing nodes, applications, virtual machines) can access memory usage data for a memory resource managed by a memory controller. Indeed, the systems described herein facilitate generation of and access to heatmaps having memory usage data thereon. The systems described herein describe features and functionality related to generating and maintaining the heatmaps as well as providing access to the heatmaps to a variety of accessing agents. This memory tracking and accessing is performed using low processing overhead while providing useful information to accessing agents in connection with memory resources managed by a memory controller.

Enabling multi-channel communications between controllers in a storage array, including: creating a plurality of logical communications channels between two or more storage array controllers; inserting, into a buffer utilized by a direct memory access (‘DMA’) engine of a first storage array controller, a data transfer descriptor describing data stored in memory of the first storage array controller and a location to write the data to memory of a second storage array controller; retrieving, in dependence upon the data transfer descriptor, the data stored in memory of the first storage array controller; and writing, via a predetermined logical communications channel, the data into the memory of the second storage array controller in dependence upon the data transfer descriptor.

Embodiments described herein provide improved methods and systems for generating metadata for media objects at a computational engine (such as an artificial intelligence engine) within the storage edge controller, and for storing and using such metadata, in data processing systems.

Systems and methods that substantially or fully remove a commanding server from a data path (e.g., as part of a data migration, disaster recovery, and/or the like) to improve data movement performance and make additional bandwidth available for other system processes and the like. Broadly, a network interface card (e.g., host bus adapter (HBA)) of a tape drive may be configured in both a target mode to allow the tape drive to be a recipient of control commands from a server to request and/or otherwise obtain data from one or more source tape drives, and in an initiator mode to allow the tape drive to send commands to the one or more tape drives specified in the commands received from the server to request/read data from and/or write data to such one or more tape drives.