Abstract: A dispersed storage system includes a plurality of storage units that each include a partial rebuild grid module. The partial rebuild grid module includes partial rebuilding functionality to reconstruct one of a plurality of encoded data slices wherein the plurality of encoded data slices are generated from a data segment based on an error encoding dispersal function. In the partial rebuilding process, a data slice is rebuilt by combining in any order slice partials generated from at least a threshold number T of the plurality of data slices.

Abstract: A method includes receiving, by a storage unit of a dispersed storage network (DSN) an access request for an encoded data a slice of a set of encoded data slices from a computing device of the DSN. The method further includes queueing, by the storage unit, the access request for the encoded data slice. The method further includes, prior to executing the access request, determining, by the storage unit, whether a session associated with the access request is still active and whether execution the access request for encoded data slice is still needed. When the session is still active and the execution of the access request for the encoded data slice is still needed, the method further includes executing, by the storage unit, the access request for the encoded data slice.

Abstract: A method includes generating a plurality of segment allocation tables (SATs) for pluralities of sets of encoded data slices. For a first SAT, the method further includes dispersed storage error encoding the first SAT to produce a first set of encoded SAT slices. The method further includes generating a first source name for the first plurality of sets of encoded data slices and the first SAT based on an object identifier associated with the data object. The method further includes generating, based on the first source name, a first plurality of sets of slices names for the first plurality of sets of encoded data slices and the first set of encoded SAT slices. The method further includes outputting, based on the first plurality of sets of slices names, the first plurality of sets of encoded data slices and the first set of encoded SAT slices to storage units.

Abstract: A method begins by a dispersed storage (DS) processing module of a dispersed storage network (DSN) sending a plurality of sets of encoded data slices to DSN memory for storage in accordance with a plurality of sets of DSN data addresses. The method continues with the DS processing module generating retrieval data that is based on a data object number and data storage information. The method continues with the DS processing module dispersed storage error encoding the retrieval data to produce a set of encoded retrieval data slices and generating a set of DSN retrieval data addresses based on the data name and on retrieval data storage information. The method continues with the DS processing module sending the set of encoded retrieval data slices to the DSN memory for storage in accordance with the set of DSN retrieval data addresses.

Abstract: A method begins by a dispersed storage (DS) processing module of a dispersed storage network (DSN) receiving a DSN access request regarding at least one data segment of a data object. The method continues with the processing module performing a scoring function using one or more properties of the DSN access request and one or more properties of DSN memory of the DSN to produce a storage scoring resultant, where the DSN memory includes a plurality of storage units that are logically arranged into a plurality of storage pools. The method continues with the processing module utilizing the storage scoring resultant to identify a set of storage units of the plurality of storage units affiliated with a given storage pool of the plurality of storage pools. The method continues with the processing module sending a set of access requests to the set of storage units regarding the DSN access request.

Abstract: A distributed storage network contains a user device that has a computing core, a DSN interface and either an integrated or an externally-connected camera or sensor. The camera or sensor collects data from its surrounding environment and processes the data at least partially through error coding dispersal storage functions that include slicing the data into a plurality of error-coded data slices. The error-coded data slices are output by the user device for one or more of storage within a dispersed storage network (DSN) memory, playing on a destination player, or broadcast consumption over a network. A storage integrity unit manages the storage capacity, use, and/or throughput of the system to ensure that data is processing in a real time or near real time so that data can be accurately processed and perceived by targeted end users.

Abstract: A method begins by a processing module of a computing device receiving a most current revision value for a data element, where a revision value for the data element is generated based on a current time of a storing device. The method continues with the processing module generating a new revision value for a currently revised version of the data element based on a current time of the computing device and comparing the current time of the new revision value with the current time of the most current revision value. When the current time of the new revision value precedes the current time of the most current revision value, the method continues with the processing module adjusting the new revision value to produce an adjusted revision value and facilitating storage of the currently revised version of the data element having the adjusted revision value.

Abstract: A method begins by determining slice names of encoded data slices stored within a dispersed storage network (DSN). The method continues by determining dispersed storage (DS) units within the DSN storing a set of the encoded data slices associated with the slice names. The method continues by determining one or more revision numbers associated with the slice names. The method continues by determining if same slice names have different associated revision numbers and, when the same slice names have different associated revision numbers, adding the slice names to a revision mailbox for subsequent correction.

Abstract: A computing device of a dispersed storage network (DSN) includes a memory, interface and a processing module operable to identify an encoded data slice of the set of encoded data slices to produce an identified encoded data slice. The processing module generates a set of first write requests regarding the set of encoded data slices less the identified encoded data slice, and generates a set of second write requests regarding the identified encoded data slice. The set of second write requests include the identified encoded data slice and replications of the identified encoded data slice. The processing module sends the set of first write requests to storage units of the DSN, and sends the set of second write requests to a set of storage units of the DSN, where each storage unit of the set of storage units is sent a corresponding one of the set of second write requests.

Abstract: A method begins by a processing module receiving an encoded data slice for storage in memory that is organized as a plurality of log files and identifying a log file based on information regarding the encoded data slice to produce an identified log file, wherein the identified log file is storing at least one other encoded data slice. The method continues with the processing module comparing storage parameters of the identified log file with desired storage parameters associated with the encoded data slice. The method continues with the processing module attempting to identify a second log file based on an alternate log file storage protocol when the storage parameters of the identified log file compare unfavorably with the desired storage parameters and when the second log file is identified, storing the encoded data slice in the second log file.

Abstract: A method includes a dispersed storage (DS) processing module receiving a request. The method continues by identifying a session associated with the request. The method continues by queueing one or more tasks associated with the request. The method continues by determining whether the session is still active. When the session is not active, the method continues by cancelling the one or more tasks associated with the session prior to execution. When the session is still active, the method continues by executing the first task of the one or more tasks when a task resource is available.

Abstract: A method includes receiving a task for execution by a plurality of distributed storage and task execution units A priority level is determined for the task. A plurality of coordinated partial task requests are generated and sent to the plurality of distributed storage and task execution units, wherein the plurality coordinated partial task requests indicate a plurality of coordinated partial tasks and the priority level. A plurality of partial task results are received in response to performance of the plurality of coordinated partial tasks by the plurality of distributed storage and task execution units. A task result for the task is generated based on the plurality of partial task results.

Abstract: A method begins by a first computing device determining a routing plan to route a set of encoded data slices from the first computing device to a second computing device via a plurality of network paths of a communications network. The method continues with the second computing device receiving encoded data slices via one or more network paths. When the second computing device receives a decode threshold number of encoded data slices, the method continues with the second computing device sending a message to the communications network indicating receipt of the decode threshold number of encoded data slices. The method continues with a relay unit determining whether the relay unit is in possession of a not-yet delivered encoded data slice. When the relay unit is in possession of the not-yet delivered encoded data slice, the method continues with the relay unit ceasing forwarding of the not-yet delivered encoded data slice.

Abstract: A method includes identifying an independent data object of a plurality of independent data objects for retrieval from dispersed storage network (DSN) memory. The method further includes determining a mapping of the plurality of independent data objects into a data matrix, wherein the mapping is in accordance with the dispersed storage error encoding function. The method further includes identifying, based on the mapping, an encoded data slice of the set of encoded data slices corresponding to the independent data object. The method further includes sending a retrieval request to a storage unit of the DSN memory regarding the encoded data slice. When the encoded data slice is received, the method further includes decoding the encoding data slice in accordance with the dispersed storage error encoding function and the mapping to reproduce the independent data object.

Abstract: A method begins by a processing module identifying, in accordance with an ordered manner, a next distributed computing function, where distributed computing functions are stored in multiple storage units as a set of encoded computing function slices. The method continues with the processing module determining whether ownership of the next distributed computing function can be established and when the ownership of the next distributed computing function can be established, securing ownership of the next distributed computing function. When the ownership of the next distributed computing function cannot be established, the method continues with the processing module requesting another next distributed computing function.

Abstract: A method begins by a processing module generating a payload of a dispersed storage network frame regarding a conclusive write request operation by generating one or more slice name fields of a payload to include one or more slice names corresponding to one or more write commit responses of a write request operation, wherein the conclusive write request operation is a conclusive phase of the write request operation. The method continues with the processing module generating one or more slice revision numbering fields of the payload, wherein each slice revision numbering field includes a slice revision number corresponding to an associated slice name of the one or more slice names. The method continues with the processing module generating a protocol header of the DSN frame by generating a payload length field of the protocol header to include a payload length and generating remaining fields of the protocol header.

Abstract: In a dispersed storage network where slices of secure user data are stored on geographically separated storage units (44), a managing unit (18) connected to the network (20) may seek to broadcast and update secure access control list information across the network (20). Upon a target device (e.g., devices 12, 14, 16, 18, or 44) receiving the broadcast the target device creates and sends an access control list change notification message to all other system devices that should have received the same broadcast if the broadcast is a valid request to update access control list information. The target device waits for responses from the other system devices to validate that the broadcast has been properly sent to a threshold number of other system devices before taking action to operationally change local data in accordance with the broadcast.

Abstract: A method includes identifying an independent data object of a plurality of independent data objects for retrieval from dispersed storage network (DSN) memory. The method further includes determining a mapping of the plurality of independent data objects into a data matrix, wherein the mapping is in accordance with the dispersed storage error encoding function. The method further includes identifying, based on the mapping, an encoded data slice of the set of encoded data slices corresponding to the independent data object. The method further includes sending a retrieval request to a storage unit of the DSN memory regarding the encoded data slice. When the encoded data slice is received, the method further includes decoding the encoding data slice in accordance with the dispersed storage error encoding function and the mapping to reproduce the independent data object.

Abstract: A method begins by a requesting device transmitting a certificate signing request to a managing unit, wherein the certificate signing request includes fixed certificate information and suggested certificate information. The method continues with the managing unit forwarding the certificate signing request to a certificate authority and receiving a signed certificate from the certificate authority, wherein the signed certificate includes a certificate and a certification signature and wherein the certificate includes the fixed certificate information and determined certificate information based on the suggested certificate information. The method continues with the managing unit interpreting the fixed certificate information of the signed certificate to identify the requesting device and forwarding the signed certificate to the identified requesting device.

Abstract: A distributed storage integrity system in a dispersed storage network includes a scanning agent and a control unit. The scanning agent identifies an encoded data slice that requires rebuilding, wherein the encoded data slice is one of a plurality of encoded data slices generated from a data segment using an error encoding dispersal function. The control unit retrieves at least a number T of encoded data slices needed to reconstruct the data segment based on the error encoding dispersal function. The control unit is operable to reconstruct the data segment from at least the number T of the encoded data slices and generate a rebuilt encoded data slice from the reconstructed data segment. The scanning agent is located in a storage unit and the control unit is located in the storage unit or in a storage integrity processing unit, a dispersed storage processing unit or a dispersed storage managing unit.