IMPOSTER SLICES

摘要

Methods and apparatus for accessing dispersed storage error encoded data in a dispersed storage network (DSN). When storing data in available storage units of a DSN, a DS processing unit issues a write slice request that includes a slice name corresponding to the storage unit and a unique encoded data slice of the set of encoded data slices, where each encoded data slice includes an IDA index of the corresponding storage unit. For each unavailable storage unit, the DS processing unit issues a write imposter slice request to a foster storage unit that includes a slice name corresponding to the foster storage unit and imposter encoded data slice corresponding to the unavailable storage unit, where the imposter encoded data slice includes an IDA index corresponding to the unavailable storage unit.

主权项

1. A method of accessing data in a dispersed storage network, the dispersed storage network including a plurality of dispersed storage units, the method comprising:
dispersed storage error encoding a data segment to produce a set of encoded data slices; sending a first slice write request for receipt by a first dispersed storage unit of the plurality of dispersed storage units, the first slice write request including a first slice name corresponding to the first dispersed storage unit and a first data slice of the set of encoded data slices, wherein the first data slice includes a first information dispersed algorithm index of the first dispersed storage unit; and sending a second slice write request for receipt by a third dispersed storage unit of the plurality of dispersed storage units when a second dispersed storage unit of the plurality of dispersed storage units is unavailable, the second slice write request including a second slice name corresponding to the third dispersed storage unit and a second data slice of the set of encoded data slices, wherein the second data slice includes a second information dispersed algorithm index of the second dispersed storage unit.