公开(公告)号：US20220114053A1

公开(公告)日：2022-04-14

申请号：US17645563

申请日：2021-12-22

Applicant: Pure Storage, Inc.

Inventor： Greg R. Dhuse ,  Vance T. Thornton ,  Jason K. Resch ,  Ilya Volvovski ,  Dustin M. Hendrickson ,  John Quigley

IPC: G06F11/10 ,  G06F16/13 ,  H04L9/32 ,  G06F11/16 ,  H04L67/06 ,  H04W12/30 ,  H04W12/041 ,  H04W12/0431 ,  G06F11/07 ,  G06F11/14

Abstract: A processor in a storage network operates by: receiving an access request for a data segment, wherein the data segment is encoded utilizing an error correcting information dispersal algorithm as a set of encoded data slices that are stored in a plurality of storage units of the storage network and wherein each encoded data slice of the set of encoded data slices includes a corresponding checksum of a plurality of checksums; retrieving, from the storage network, a subset of encoded data slices that includes a threshold number of encoded data slices of the set of encoded data slices; determining, based on ones of the plurality of checksums corresponding to the subset of encoded data slices, when the subset of encoded data slices includes at least one corrupted encoded data slice; retrieving from at least one of the plurality of storage units an addition number of encoded data slices required to generate a reconstructed data segment based on the subset of encoded data slices; generating the reconstructed data segment in accordance with the error correcting information dispersal algorithm, using the additional number of encoded data slices and at least some of the subset of encoded data slices; providing the reconstructed data segment in response to the access request; forming a reconstructed set of encoded data slices utilizing the error correcting information dispersal algorithm on the reconstructed data segment; and replacing the at least one corrupted encoded data slice with at least one reconstructed encoded data slice of the reconstructed set of encoded data slices.

公开(公告)号：US20220091939A1

公开(公告)日：2022-03-24

申请号：US17457794

申请日：2021-12-06

Applicant: Pure Storage, Inc.

Inventor： Greg Dhuse ,  Andrew Baptist ,  Zachary J. Mark ,  Jason K. Resch ,  Ilya Volvovski

IPC: G06F11/10 ,  G06F11/20 ,  H04L29/14 ,  H04L29/08

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.

公开(公告)号：US20210286675A1

公开(公告)日：2021-09-16

申请号：US17334168

申请日：2021-05-28

Applicant: Pure Storage, Inc.

Inventor： Greg R. Dhuse ,  Jason K. Resch ,  Andrew D. Baptist ,  Ilya Volvovski

IPC: G06F11/10 ,  G06F3/06 ,  H04L29/08 ,  G06F16/23

Abstract: A method for execution by a computing device of a storage network includes obtaining storage performance information for a set of storage units of the storage network, where data segments are dispersed storage error encoded into pluralities of sets of encoded data slices in accordance with error encoding parameters that include a pillar width number and a decode threshold number, which is a number of encoded data slices the set of encode data slices is required to reconstruct a data segment of data segments. The method further includes determining, based on the storage performance information and the error encoding parameters, a performance threshold number for a write request to store a set of encoded data slices of the pluralities of sets of encoded data slices in the set of storage units, where the performance threshold number is greater than the decode threshold number and less than the pillar width number.

公开(公告)号：US11073993B1

公开(公告)日：2021-07-27

申请号：US16885602

申请日：2020-05-28

Applicant: Pure Storage, Inc.

Inventor： Gary W. Grube ,  Jason K. Resch ,  Timothy W. Markison ,  Ilya Volvovski ,  Manish Motwani

IPC: G06F12/06 ,  G06F13/16 ,  G06F3/06 ,  G06F12/02 ,  G06F11/10

Abstract: A method begins by a processing module determining a priority access level of an encoded data slice stored on a memory device. The method continues by determining a memory status for the memory device, wherein the memory status includes a plurality of discrete usability levels with a highest usability level representing a maximum amount of usable memory, a second usability level representing a lower usability level than the highest usability level and a lowest usability level representing an unusable level when the usable memory is below a threshold. The method continues with the processing module determining whether to migrate the encoded data slice from the memory device based on the priority access level and the memory status. The method continues with the processing module identifying another memory device. The method continues with the processing module facilitating migration of the encoded data slice to another memory device.