Utilizing integrity information for data retrieval in a vast storage system

    公开(公告)号:US10956292B1

    公开(公告)日:2021-03-23

    申请号:US17023868

    申请日:2020-09-17

    Abstract: A method includes receiving a data retrieval request. A plurality of identifiers are determined in accordance with the data retrieval request. Stored integrity information corresponding to the data retrieval request is received. Desired integrity information is generated based on the plurality of identifiers. The stored integrity information is compared with the desired integrity information. When the stored integrity information compares favorably with the desired integrity information, at least a decode threshold number of encoded data slices of a set of encoded data slices of a plurality of sets of encoded data slices are dispersed storage error decoded.

    Sending encoded data slices via multiple routing paths

    公开(公告)号:US12181969B2

    公开(公告)日:2024-12-31

    申请号:US18499319

    申请日:2023-11-01

    Abstract: A method for execution by one or more computing devices includes selecting a first routing path from a plurality of routing paths to a set of storage units based on routing path performance information, where the first routing path has a performance level greater than a first performance threshold. The method further includes selecting a second routing path from the plurality of routing paths based on the routing path performance information, where the second routing path has a performance level less than or equal to the first performance threshold. The method further includes sending a first subset of encoded data slices to the set of storage units via the first routing path for storage therein. The method further includes sending a second subset of encoded data slices to the set of storage units via the second routing path for storage therein.

    Recovering Missing Data in a Storage Network via Locally Decodable Redundancy Data

    公开(公告)号:US20240411643A1

    公开(公告)日:2024-12-12

    申请号:US18809965

    申请日:2024-08-20

    Abstract: A processing system of a storage network operates by: sending, to at least one storage unit of the storage network, at least one read request corresponding to at least a read threshold number of a set of encoded data slices to be retrieved, wherein the set of encoded data slices correspond to data, wherein the data is coded in accordance with dispersed error coding parameters that include a write threshold number and the read threshold number, wherein the write threshold number is a number of encoded data slices in the set of encoded data slices and wherein the read threshold number is a number of the set of encoded data slices that is required to decode the data; receiving, at the at least one processing circuit and from the at least one storage unit, a first subset of the set of encoded data slices, wherein at least one missing encoded data slice was not included in the first subset and wherein a number of encoded data slices in the first subset is less than the read threshold number; generating, via the at least one processing circuit, at least one rebuilt encoded data slice corresponding to the at least one missing encoded data slice utilizing locally decodable redundancy data, wherein the locally decodable redundancy data corresponds to a second subset of the set of encoded data slices that includes the at least one missing encoded data slice and wherein the locally decodable redundancy data is stored locally to the processing circuit; and recovering, via the at least one processing circuit, the data based on the at least one rebuilt encoded data slice and the first subset.

    Parity in a vast storage system using alternate memory

    公开(公告)号:US11662915B2

    公开(公告)日:2023-05-30

    申请号:US17356838

    申请日:2021-06-24

    Abstract: A method begins by a processing module of a storage network analyzing storage network memory for a level of usability and based on the analyzing, selecting alternative memory available for receipt of encoded data slices stored in current memory, where a data object is segmented into a plurality of data segments and a data segment of the plurality of data segments is dispersed error encoded in accordance with dispersed error encoding parameters to produce a set of encoded data slices. The method continues with the processing module determining whether to move encoded data slices from current memory to alternative memory and based on a determination to move slices, allocating alternative memory. Finally, the processing module moves at least some encoded data slices from a current memory to alternate memory and updates a memory assignment mechanism for the at least some encoded data slices.

    Coding of Data Streams in a Vast Storage Network

    公开(公告)号:US20220276923A1

    公开(公告)日:2022-09-01

    申请号:US17663299

    申请日:2022-05-13

    Abstract: A method begins by a processing module concurrently receiving a first data stream and a second data stream for transmission to a receiving entity. The method continues with the processing module dividing each of the first and second data streams to produce a first plurality of data blocks corresponding to the first data stream and a second plurality of data blocks corresponding to the second data stream, where data blocks of the first plurality of data blocks are time aligned with data blocks of the second plurality of data blocks. The method continues with the processing module creating a data matrix from the first and second plurality of data blocks and generating a coded matrix from the data matrix and an encoding matrix. The method continues with the processing module outputting a plurality of pairs of coded values of the coded matrix to the receiving entity.

Patent Agency Ranking