Provided are a computer program product, system, and method for using mirror indicators to indicate whether to mirror tracks in a data set in a primary volume mirrored to a secondary volume. A table includes a mirror indicator for each of a plurality of tracks in at least one data set in the primary volume indicating whether a track is to be mirrored to the secondary volume. In response to a write command of write data for one of the tracks in the primary volume, creating a record set in a cache for the primary volume including write data for the track to transfer to the secondary volume in response to the mirror indicator for the track indicating that the track is to be mirrored. The write data in the record set is transferred from the cache to the secondary volume.

A method of managing memory includes generating a page pool by aligning a plurality of pages of a memory; when a request to store first data is received, allocating a destination page corresponding to the first data using a page pool; and updating a page table using information about the allocated destination page.

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 computing system having memory components of different tiers. The computing system further includes a controller, operatively coupled between a processing device and the memory components, to: receive from the processing device first data access requests that cause first data movements across the tiers in the memory components; service the first data access requests after the first data movements; predict, by applying data usage information received from the processing device in a prediction model trained via machine learning, second data movements across the tiers in the memory components; and perform the second data movements before receiving second data access requests, where the second data movements reduce third data movements across the tiers caused by the second data access requests.

Provided are an apparatus, system and method for offloading data transfer operations between source and destination storage devices to a hardware accelerator. The hardware accelerator includes a memory space and control logic to receive, from a host processor, a command descriptor indicating at least one source storage device having transfer data to transfer to at least one destination storage device and a computational task to perform on the transfer data. The control logic sends read commands to the at least one source storage device to read the transfer data to at least one read buffer in the memory space and performs the computational task on the transfer data to produce modified transfer data. The control logic writes the modified transfer data to at least one write buffer in the memory space to cause the modified transfer data to be written to the at least one destination storage device.

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 an addressing range of a storage configuration of the DSN. The method continues by determining a storage performance level associated with the addressing range. The method continues by determining whether the storage performance level compares favorably to a storage performance threshold. The method continues, when the storage performance level does not compare favorably to a storage performance threshold, by determining an updated storage configuration associated with the addressing range and re-assigning storage resources in accordance with the updated storage configuration.

A computer-implemented method for redistributing data between memory clusters in a key value store. The data is redistributed according to a load balancing algorithm. Memory clusters are sorted into lists according to the number of intervals each cluster contains. Migration jobs are created by the load balancing algorithm to push data fragments from a larger cluster to a smaller cluster. Data fragments, or intervals, are selected for migration according to corresponding data fragments on a target cluster or the number of occupying data fragments on a target cluster. The redistribution of data helps avoid fragmentation of key ranges of intervals, decrease the overall number of non-adjacent key ranges, and to conform to the routing table requirements.

Intelligent local management of data stream throttling in data movement operations, such as secondary-copy operations in a storage management system, is disclosed. 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. Bandwidth is dynamically allocated and re-allocated to data streams used by ongoing jobs, in response to new jobs starting and old jobs completing, without having to pause and restart ongoing jobs to accommodate bandwidth adjustments. The illustrative embodiment also provides local users with a measure of control over data streamsto suspend, pause, and/or resume themindependently from the centralized storage manager that manages the storage management system as a whole.

An information processing apparatus includes: a controller that controls a plurality of storage devices and transmits and receives data to and from the plurality of storage devices; and a bridge that communicates with the controller via a predetermined interface, communicates with each of the plurality of storage devices via each of a plurality of predetermined interfaces, and bridges the communications between the controller and the plurality of storage devices. The controller acquires information of a master boot record from each of the plurality of storage devices, and generates information of a master boot record in a virtual storage device to provide the plurality of storage devices as one storage device. The bridge controls a process for writing the information of the master boot record in the virtual storage device into a region of a master boot record in a first storage device out of the plurality of storage devices.

Techniques for improving storage efficiency of a data storage system are provided. The techniques include (a) performing a testing operation to evaluate whether a test condition is satisfied for a filesystem having a plurality of subspaces, each subspace being provisioned with a respective amount of storage, each subspace of the filesystem being dedicated to storing different respective types of filesystem content, wherein the test condition indicates that a first subspace has available space in excess of a threshold percentage, (b) in response to determining that the test condition is satisfied for the filesystem, performing a reduction operation on the first subspace to remove a portion of storage provisioned to that subspace while retaining the removed portion for use by the filesystem, and (c) upon a second subspace reaching a fullness threshold, provisioning the removed portion to the second subspace and storing content of the respective type of the second subspace thereon.