Proxying slice access requests during a data evacuation
First Claim
1. A method for execution by one or more processing modules of one or more computing devices of a dispersed storage network (DSN), the method comprises:
- selecting a second storage unit based a decentralized agreement module decision decided by a decentralized agreement module, wherein the decentralized agreement module receives a ranked scoring information request from a requestor with regards to a set of candidate storage unit resources and, for each of the candidate storage unit resources, the decentralized agreement module performs a deterministic function on a location identifier (ID) of the candidate storage unit resource or an asset ID of the ranked scoring information request;
initiating an evacuation of encoded data slices from a first storage unit to the second storage unit;
receiving, at the second storage unit, a checked write slice request from a requesting entity, the checked write slice request including a requested encoded data slice;
determining, at the second storage unit, that locally stored encoded data slices do not include the requested encoded data slice; and
generating, at the second storage unit, a response to include one or more of;
a code associated with the checked write slice request, a name of the encoded data slice, or a revision level.
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Accused Products
Abstract
A method begins by a processing module receiving a checked write slice request from a requesting entity. The method continues by determining that locally stored encoded data slices do not include the requested encoded data slice. The method continues by identifying an alternate location for the requested encoded data slice. The method continues by determining whether the alternate location is associated with storage of the encoded data slice. The method continues when the alternate location is associated with the storage of the encoded data slice, by issuing a favorable checked write slice response to a requesting entity. The method can include facilitating transfer of the requested encoded data slice from the alternate location to the storage unit for storage.
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Citations
17 Claims
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1. A method for execution by one or more processing modules of one or more computing devices of a dispersed storage network (DSN), the method comprises:
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selecting a second storage unit based a decentralized agreement module decision decided by a decentralized agreement module, wherein the decentralized agreement module receives a ranked scoring information request from a requestor with regards to a set of candidate storage unit resources and, for each of the candidate storage unit resources, the decentralized agreement module performs a deterministic function on a location identifier (ID) of the candidate storage unit resource or an asset ID of the ranked scoring information request; initiating an evacuation of encoded data slices from a first storage unit to the second storage unit; receiving, at the second storage unit, a checked write slice request from a requesting entity, the checked write slice request including a requested encoded data slice; determining, at the second storage unit, that locally stored encoded data slices do not include the requested encoded data slice; and generating, at the second storage unit, a response to include one or more of;
a code associated with the checked write slice request, a name of the encoded data slice, or a revision level. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A computing device of a group of computing devices of a dispersed storage network (DSN), the computing device comprises:
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an interface; a memory; and a processing module operably coupled to the interface and the memory, wherein the processing module functions to perform operations including; selecting a second storage unit based a decentralized agreement module decision decided by a decentralized agreement module, wherein the decentralized agreement module receives a ranked scoring information request from a requestor with regards to a set of candidate storage unit resources and, for each of the candidate storage unit resources, the decentralized agreement module performs a deterministic function on a location identifier (ID) of the candidate storage unit resource or an asset ID of the ranked scoring information request; initiating an evacuation of encoded data slices from a first storage unit to the second storage unit; receiving, at the second storage unit, a checked write slice request from a requesting entity, the checked write slice request including a requested encoded data slice; determining, at the second storage unit, that locally stored encoded data slices do not include the requested encoded data slice; and generating, at the second storage unit, a response to include one or more of;
a code associated with the checked write slice request, a name of the encoded data slice, or a revision level. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A non-transitory computer readable storage medium comprises:
at least one memory section that stores operational instructions that, when executed by a processing system of a dispersed storage network (DSN) that includes a processor and a memory, causes the processing system to perform operations including; selecting a second storage unit based a decentralized agreement module decision decided by a decentralized agreement module, wherein the decentralized agreement module receives a ranked scoring information request from a requestor with regards to a set of candidate storage unit resources and, for each of the candidate storage unit resources, the decentralized agreement module performs a deterministic function on a location identifier (ID) of the candidate storage unit resource or an asset ID of the ranked scoring information request; initiating an evacuation of encoded data slices from a first storage unit to the second storage unit; receiving, at the second storage unit, a checked write slice request from a requesting entity, the checked write slice request including a requested encoded data slice; determining, at the second storage unit, that locally stored encoded data slices do not include the requested encoded data slice; and generating, at the second storage unit, a response to include one or more of;
a code associated with the checked write slice request, a name of the encoded data slice, or a revision level.- View Dependent Claims (16, 17)
Specification