Abstract: A method begins by a computing device of a dispersed storage network (DSN) selectively bringing online and taking offline storage units of a set of storage units of the DSN. When bringing a first storage unit of the set of storage units online in accordance with the selectively bringing online and taking offline storage units, the method continues with the computing device determining a rebuilding approach of the first storage unit. The method continues with the computing device bringing the first storage unit online in accordance with the rebuilding approach.

Abstract: A method includes transmitting a solicitation message to target storage units of a plurality of storage units of a storage network, where the solicitation message solicits the target storage units to store encoded data slices of a first data segment of data, and where the message is not sent to other storage units of the plurality of storage units. The method further includes receiving favorable responses from at least some of target storage units, and determining an error coding function based on an amount of the favorable responses and data storage requirements for the first data segment. The method further includes encoding the first data segment in accordance with the error coding function to produce a plurality of encoded data slices. The method further includes outputting the plurality of encoded data slices to storage units of the at least some of the target storage units for storage therein.

Abstract: Writing data in a storage system that includes a first type of storage device and a second type of storage device, including: selecting, for one or more unprocessed write requests, a target storage device type from the first type of storage device and the second type of storage device; issuing a first group of write requests to the first type of storage device, the first group of write requests addressed to one or more locations selected in dependence upon an expected address translation to be performed by the first type of storage device; and issuing a second group of write requests to the second type of storage device, the second group of write requests addressed to one or more locations selected in dependence upon a layout of memory in the second type of storage device.

Abstract: A method of providing end-to-end encryption for data stored in a storage system, including: receiving a request to read encrypted data from a logical volume of a storage system; decrypting the encrypted data using a decryption key associated with at least one property of the storage system; performing at least one of a data operation to reconstitute the data; encrypting the data using an encryption key associated with at least one property of the data to generate new encrypted data; and providing a response to the request that includes the new encrypted data.

Abstract: An example method includes transferring, for each of a plurality of snapshots of a source virtual storage volume mounted at a first compute node, at least a portion of a plurality of data blocks for each of the snapshots to a target virtual storage volume at a second compute node; and after the data blocks are transferred, resynchronizing the target virtual storage volume with the source virtual storage volume.

Abstract: An illustrative method includes a data protection system determining that data stored by a storage system is under a possible attack, detecting a modify request with respect to the storage system while the data stored by the storage system is under the possible attack, determining that the modify request may be related to the possible attack, and performing, in response to determining that the modify request may be related to the possible attack, a remedial action with respect to the modify request.

Abstract: A storage system switching mediators within a storage system synchronously replicating data, where the switching between mediators includes: determining, among one or more of the plurality of storage systems, a change in availability of a first mediator service, wherein one or more of the plurality of storage systems are configured to request mediation from the first mediator service; communicating, among the plurality of storage systems and responsive to determining the change in availability of the first mediator service, a second mediator service to use in response to a fault; and switching, in dependence upon the change in availability of the first mediator service, from the first mediator service to the second mediator service.

Abstract: A method includes determining a plurality of identifiers based on a data retrieval request. Integrity information is generated based on determining the plurality of identifiers. Stored integrity information corresponding to the data retrieval request is compared with the integrity information. When the stored integrity information compares unfavorably with the integrity information, corruption associated with the plurality of identifiers is determined.

Abstract: A method for managing memory in a storage network begins by monitoring a service life indicator for a plurality of solid-state memory devices in the storage network and determining whether a memory device of the plurality of solid-state memory devices is approaching an end-of-life event, where end-of-life event is based on a predetermined service life. When the memory device is approaching an end-of-life event the method continues by determining whether to migrate one or more encoded data slices from the memory device to an alternative memory device and based on a decision to migrate the one or more encoded data slices, selecting a migration scheme from a plurality of migration schemes for migrating the one or more encoded data slices. Finally, the method continues by facilitating migrating the one or more encoded data slices according to the selected migration scheme.

Abstract: An illustrative method includes determining whether a virtual storage volume is successfully mounted to a mount path associated with a compute node, the mount path being marked as read-only, marking, if the determining includes determining that the virtual storage volume is successfully mounted to the mount path, the mount path as writable, and maintaining, if the determining includes determining that the virtual storage volume is unsuccessfully mounted to the mount path, the mount path as read-only.

Abstract: Utilizing different data compression algorithms based on characteristics of a storage system, including: selecting, in dependence upon a priority for conserving processing resources or storage resources in a storage system, a data compression algorithm to utilize to compress data; detecting that at least one of an amount of processing resources available in the storage system or the amount of space available to store additional data in the storage system has changed; and responsive to detecting that at least one of the amount of processing resources available in the storage system or the amount of space available to store additional data in the storage system has changed, selecting a different data compression algorithm to utilize to compress data.

Abstract: An illustrative method includes receiving, by an integrated storage manager from an operating system level virtualization service, a request to perform an operation with respect to one or more storage systems; determining, by the integrated storage manager, multiple versions of a performance impact among the one or more storage systems based on potentially implementing the request in multiple ways; and implementing, by the integrated storage manager based on the determining of the multiple versions of the performance impact, the request in a particular way that improves one or more storage system metrics of the one or more storage systems.

Abstract: A computing device for use in a storage network includes one or more network interfaces, memory with operational instructions and a processing module. The processing module is configured to execute the operational instructions receive a storage request for data and select a plurality of memory devices for storage of the data. The processing module partitions the data into a plurality of chunk sets and encode each chunk set of the plurality of chunk sets according to a dispersed storage error coded function to produce a plurality of chunks. Finally, the processing module facilitates storage of each chunk of the plurality of chunks in a memory device of the plurality of memory devices.

Abstract: An illustrative method includes a storage-aware serverless function management system determining a status of a serverless system that implements one or more serverless functions configured to access one or more components of a storage system, determining a utilization of the storage system, and requesting that the storage system adjust storage of data in the storage system based on the status of the serverless system and the utilization of the storage system.

Abstract: A storage network operates by: encoding, via a dispersed error encoding, at least one data object as a write threshold number of encoded data slices; storing the write threshold number of the encoded data slices in a set of storage units of the storage network; determining when, due to a failure of at least one of the set of storage units, less than a pillar width number of the encoded data slices of a common revision are retrievable from the set of storage units: retrieving a decode threshold number of the encoded data slices from others of the set of storage units; decoding the decode threshold number of the encoded data slices to reproduce the at least one data object; restoring availability of the pillar width number of the encoded data slices of the common revision by: rebuilding at least a subset of encoded data slices of the set of encoded data slices, based on an encoding of the at least one data object; and storing the at least a subset of encoded data slices in the storage network.

Abstract: A method for erasure detection in a storage cluster is provided. The method includes establishing a connection, via a network, of a storage unit to one of a plurality of storage nodes of a storage cluster and determining, for at least one page of a storage memory of the storage unit, that the at least one page is erased. The storage unit is one of a plurality of storage units configured to store user data in memory of the storage units in accordance with direction from the plurality of storage nodes. The method includes communicating from the storage unit to the one of the plurality of storage nodes that the at least one page is erased.

Abstract: A storage array controller may receive a write request comprising data to be stored at one or more solid-state storage devices. A write granularity associated with the write request may be generated that is less than a logical block size associated with the storage array controller. The data associated with the write request may be segmented based on the generated write granularity. The write request may be executed to store the segmented data at the one or more solid-state storage devices.

Abstract: Methods and apparatus for use in a storage network operate by: storing, in a first storage unit of a first set of storage units of the storage network, a first encoded data slice corresponding to at least one data object; assigning one or more additional storage units to the storage network to form a second set of storage units, the second set of storage units including the one or more additional storage units; migrating the first encoded data slice from the first storage unit to at least one of the one or more additional storage units of the second set of storage units; and reallocating a mapping of the first encoded data slice from the first storage unit to the at least one of the one or more additional storage units of the second set of storage units.

Abstract: A method for execution by a computing device of a storage network includes determining a utilization level of a local flash memory. The method further includes determining whether the utilization level compares favorably to a utilization threshold. When the utilization level compares favorably to the utilization threshold, The method further includes sending an encoded data slice storage solicitation message to another computing device. The method further includes receiving a plurality of encoded data slices from the other computing device, where data is dispersed storage error encoded into pluralities of sets of encoded data slices, and where the pluralities of sets of encoded data slices includes the plurality of encoded data slices. The method further includes storing the plurality of encoded data slices in the local flash memory.

Abstract: A method includes retrieving an encoded data slice from memory of a storage network, where the encoded data slice is associated with a slice integrity value stored in the memory, and where a data segment of data is error encoded into a set of encoded data slices that includes the encoded data slice. The method further includes generating a second slice integrity value based on the retrieved encoded data slice. The method further includes determining whether the second slice integrity value compares favorably to the slice integrity value. When the second slice integrity value compares unfavorably to the slice integrity value, the method further includes facilitating rebuilding of the encoded data slice to produce a rebuilt encoded data slice. The method further includes storing the rebuilt encoded data slice in the memory.