摘要:
A method begins by a dispersed storage (DS) processing detecting unavailability of a storage device of a site of dispersed storage network (DSN) memory to produce an unavailable storage device. The method continues with the DS processing module reassigning a fraction of a logical address sub-range of the unavailable storage device to one or more other storage devices, rebuilding one or more logically addressable data objects to produce one or more rebuilt data objects and storing the one or more rebuilt data objects in the one or more other storage devices. When the unavailable storage device becomes available, the method continues with the DS processing module reallocating the fraction of the logical address sub-range from the one or more other storage devices to the storage device and transferring the one or more rebuilt data objects from the one or more other storage devices to the storage device.
摘要:
A method begins by a dispersed storage (DS) processing module determining to expand a hierarchical ordered index structure and retrieving a root index node. The method continues with the DS processing module identifying immediate children index nodes, dividing the immediate children index nodes into sets of children index nodes, creating, for each of the sets of children index nodes, a sub-root index node to produce a set of sub-root index nodes, creating a new root index node to include entries for each of the sub-root index nodes of the set of sub-root index nodes, and temporarily storing the new root index node and the set of sub-root index nodes in a dispersed storage network (DSN). When the root index node has not changed, the method continues with the DS processing module updating the hierarchical ordered index structure with the new root index node and the set of sub-root index nodes.
摘要:
A method begins by a dispersed storage (DS) processing module receiving a partial task regarding an encoded data block grouping. The method continues with the DS processing module performing the partial task on the encoded data block grouping to produce a partial task result and determining subsequent treatment of the partial task result. When the subsequent treatment includes storage of the partial task result, the method continues with the DS processing module determining a manner in which the partial task result is to be stored. When the manner in which the partial task result is to be stored is dispersed storage, the method continues with the DS processing module dispersed storage error encoding the partial task result to produce one or more sets of encoded partial task result blocks and outputting the one or more sets of encoded partial task result blocks to a set of DST execution units.
摘要:
A method begins by a distributed storage (DS) processing module identifying encoded data slices of stored encoded data slices to transfer, wherein the stored encoded data slices are assigned addresses within a local distributed storage network (DSN) address range, wherein a global DSN address space is divided into a plurality of address sectors, and wherein the local DSN address range is a portion of an address sector. The method continues with the DS processing module determining whether another local DSN address range in the address sector exists and when the other local DSN address range in the address sector exists, determining whether to transfer identified encoded data slices into the other local DSN address range. When the at least some of the identified encoded data slices are to be transferred, the method continues with the DS processing module initiating a data transfer protocol to transfer the identified encoded data slices.
摘要:
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.
摘要:
A method for execution, when a generic computing device is paired with a specific computing device (SCD) token, begins with the SCD token sending distributed storage network (DSN) access request to DSN memory via the generic computing device, wherein the DSN access request identifies SCD operation information that is stored as one or more of sets of encoded data slices in the DSN memory and wherein the SCD operation information was encoded using a dispersed storage error encoding function to produce the plurality of sets of encoded data slices. Then, the SCD token receives the one or more of sets of encoded data slices from the DSN memory via the generic computing device and decodes the one or more of sets of encoded data slices to retrieve the SCD operation information and enables the generic computing device to function as an SCD in accordance with the SCD operation information.
摘要:
A processing module encodes data using a dispersed storage error coding function to produce a set of encoded data slices and identifies storage units for storage of the set of encoded data slices. The processing module determines that a storage unit of the storage units is unavailable, where the storage unit is targeted to store an encoded data slice of the set of encoded data slices. The processing module selects a foster storage unit of the storage units for temporarily storing the encoded data slice. When the storage unit is available, the processing module transfers the encoded data slice from the foster storage unit to the storage unit.
摘要:
A method includes a set of execution units of a dispersed storage network (DSN) receiving sets of sub-task requests from a computing device and storing the sets of sub-task requests, where each execution unit stores a request of each of the sets of sub-task requests to produce a corresponding plurality of sub-task requests. The method continues with each execution unit generating sub-task estimation data and adjusting timing, sequencing, or processing of the corresponding plurality of sub-task requests based on the estimation data to produce a plurality of partial results, where, due to one or more difference factors from a list of difference factors, the execution units process pluralities of sub-task requests at difference paces, where the list of difference factors includes differences in amounts of data to be processed per sub-task request, processing capabilities, memory storage capabilities, and networking capabilities.
摘要:
A method begins by a first computing device generating an initial routing plan that identifies network paths for transmitting encoded data slices of an encoded data segment from the first computing device to a second computing device. The method continues with the first computing device sending a plurality of subsets of encoded data slices to network paths. Within a network path, the method continues by a relay unit determining whether the network path defined by the initial routing plan requires adjusting. When the network path requires adjusting, the method continues with the relay unit establishing an adjusted network path by at least one of adding a relay unit and deleting a relay unit. The method continues with the relay unit sending, via the adjusted network path, the corresponding subset of encoded data slices to the second computing device.
摘要:
A first section of the data object is received that contains less than a full amount of the data object. A processing module of a distributed storage (DS) processing unit determines that communication of the data object has been interrupted and whether to store the first section of the data object. The first section of the data object is stored in a DS network when determined to store the first section of the data object.