公开(公告)号：US20250110862A1

公开(公告)日：2025-04-03

申请号：US18375135

申请日：2023-09-29

Applicant: Dropbox, Inc.

Inventor： Sandeep Kumar R. Ummadi ,  Facundo Agriel ,  Ankur Kulshrestha

IPC: G06F12/02

Abstract: A system receives a request for a data block, in which the data block corresponds to a set of fragments, and the data block can be fully reconstructed using a threshold number of the set of fragments. A first subset of the set of fragments are stored in a first storage system, and a second subset of the set of fragments are stored in a second storage system characterized by a higher average latency than the first storage system. A system, responsive to receiving the request for the data block, requests the first subset of the set of fragments. A system receives at least the threshold number of the first subset of the fragments. A system reconstructs the data block using the received fragments of the first subset of the fragments. A system provides the reconstructed data block.

公开(公告)号：US20250028469A1

公开(公告)日：2025-01-23

申请号：US18225058

申请日：2023-07-21

Applicant: Dropbox, Inc.

Inventor： Ankur Kulshrestha ,  Sandeep Kumar R. Ummadi ,  Facundo Agriel ,  David Robb ,  Eric Shobe ,  Jared Mednick

IPC: G06F3/06 ,  G06F11/00 ,  G06F11/34 ,  G11B20/18

Abstract: The system obtains performance signals associated with respective hard disks of a volume of hard disks including a plurality of hard disks that are dedicated to activities of a service. The system determines a volume failure prediction for the volume of hard disks by, for each respective hard disk of the volume of hard disks, determining a hard disk failure prediction. The system determines a hard disk failure prediction by: inputting the respective performance signals into a supervised machine learning model; and receiving as output from the machine learning model the hard disk failure prediction for the respective hard disk. The system based on the received outputs, determines that the volume failure prediction is associated with a migration condition. The system, responsive to determining that the volume failure prediction is associated with the migration condition, migrates data from the volume of hard disks to a second volume of hard disks.

公开(公告)号：US20210064269A1

公开(公告)日：2021-03-04

申请号：US16558954

申请日：2019-09-03

Applicant: Dropbox, Inc.

Inventor： Sandeep Kumar R. Ummadi ,  Omar Jaber

IPC: G06F3/06

Abstract: Computer-implemented techniques for fair data scrubbing. The techniques can be used to balance a desire to verify recently stored data soon after it is stored on a target data storage media device, when the computing and networking cost of reconstructing the data in the event of a detected data storage media device error can be lower, against a desire to minimize the latency between rescrubbing data. By doing so, the techniques improve the operation of a data storage system that implements the techniques.

公开(公告)号：US10922012B1

公开(公告)日：2021-02-16

申请号：US16558954

申请日：2019-09-03

Applicant: Dropbox, Inc.

Inventor： Sandeep Kumar R. Ummadi ,  Omar Jaber

IPC: G06F3/06

Abstract: Computer-implemented techniques for fair data scrubbing. The techniques can be used to balance a desire to verify recently stored data soon after it is stored on a target data storage media device, when the computing and networking cost of reconstructing the data in the event of a detected data storage media device error can be lower, against a desire to minimize the latency between rescrubbing data. By doing so, the techniques improve the operation of a data storage system that implements the techniques.