公开(公告)号：US20210004163A1

公开(公告)日：2021-01-07

申请号：US16504204

申请日：2019-07-05

Applicant: VMWARE, INC.

Inventor： Yiqi XU ,  Enning XIANG ,  Eric KNAUFT ,  Pascal RENAULD

IPC: G06F3/06 ,  G06F9/48 ,  G06F9/38 ,  G06F9/455 ,  G06F9/50 ,  G06F9/52

Abstract: The disclosure herein describes performing resynchronization (“resync”) jobs in a distributed storage system based on a parallelism policy. A resync job is obtained from a queue and input/output (I/O) resources that will be used during execution of the resync job are identified. Available bandwidth slots of each I/O resource of the identified I/O resources are determined. The parallelism policy is applied to the identified I/O resources and the available bandwidth slots. Based on the application of the parallelism policy, a bottleneck resource of the I/O resources is determined and a parallel I/O value is calculated based on the available bandwidth slots of the bottleneck resource, wherein the parallel I/O value indicates a quantity of I/O tasks that can be performed in parallel. The resync job is executed using the I/O resources, the execution of the resync job including performance of I/O tasks in parallel based on the parallel I/O value.

公开(公告)号：US20190034505A1

公开(公告)日：2019-01-31

申请号：US15660753

申请日：2017-07-26

Applicant: VMware, Inc.

Inventor： Pascal RENAULD ,  Enning XIANG ,  Eric KNAUFT

IPC: G06F17/30 ,  G06F9/455 ,  G06F3/06

CPC classification number: G06F16/27 ,  G06F3/0619 ,  G06F3/065 ,  G06F3/0665 ,  G06F3/067 ,  G06F3/0689 ,  G06F9/45558 ,  G06F16/188 ,  G06F2009/45583 ,  G06F2009/45595

Abstract: Component objects of a virtual disk are backed by first storage nodes, which are at a primary site, and second storage nodes, which are at a secondary site. The method of resynchronizing the component objects of the virtual disk includes, at a coordinating node at the primary site, responsive to a second storage node coming back online, identifying an out-of-sync block of the second storage node, locating the out-of-sync block in an address space maintained for blocks of the virtual disk, and transmitting a resync command to a replication module of a coordinating node at the secondary site, the resync command identifying the out-of-sync block within the address space.

公开(公告)号：US20250094401A1

公开(公告)日：2025-03-20

申请号：US18469533

申请日：2023-09-18

Applicant: VMware, Inc.

Inventor： Quanxing LIU ,  Wenguang WANG ,  Eric KNAUFT ,  Enning XIANG ,  Salit GAZIT ,  Satish PUDI

IPC: G06F16/22 ,  G06F16/23

Abstract: A system manages a log-structured file system (LFS) by: receiving an input/output (I/O) operation for the LFS, the I/O operation prompting a key to be added to a first node of a tree metadata structure, the tree mapping addresses in a first address space to addresses in a second address space; determining that addition of the key to the first node would exceed a maximum number of keys allowed in the first node; adding a second node to the tree based on the determining, the second node containing the key; moving a quantity of keys from the first node to the second node such that a total number of keys resulting in the second node is less than half of the maximum number of keys, minus one, configured to be stored in nodes of the LFS; and writing updates to the tree metadata structure within the LFS.

公开(公告)号：US20240220370A1

公开(公告)日：2024-07-04

申请号：US18147061

申请日：2022-12-28

Applicant: VMware, Inc.

Inventor： Zhen LIU ,  Tao XIE ,  Banghui LUO ,  Enning XIANG ,  Yang Yang ZHANG

IPC: G06F11/14

CPC classification number: G06F11/1451 ,  G06F11/1435 ,  G06F11/1464 ,  G06F2201/845

Abstract: A method for implementing native snapshot capabilities on non-native snapshots includes generating a virtual disk container having both native snapshot functionality and functionality of the non-native snapshot, including redo-log snapshot functionality. Redo-log parent disk chains may be preserved, along with subsequent native snapshot data, in virtual disk container objects. A virtual root node of a copy-on-write data structure of a virtual disk container object enables snapshotting and traversal between a redo-log disk chain and a native snapshot disk chain. Throughout backup and reversion operations, the virtual disk container object may be reparented as necessary, and a constant running point may be maintained for the virtual disk container object.

公开(公告)号：US20230281167A1

公开(公告)日：2023-09-07

申请号：US18314198

申请日：2023-05-09

Applicant: VMWARE, INC.

Inventor： Enning XIANG ,  Eric KNAUFT ,  Pascal RENAULD ,  Yiqi XU ,  Pratik DESAI ,  Yizhou LUO

IPC: G06F16/178 ,  G06F16/11 ,  G06F16/176 ,  G06F3/06 ,  G06F16/182 ,  G06F16/188

CPC classification number: G06F16/178 ,  G06F16/128 ,  G06F16/1767 ,  G06F16/125 ,  G06F3/067 ,  G06F16/1844 ,  G06F16/188 ,  G06F3/065 ,  G06F3/0604 ,  G06F16/1824

Abstract: Hybrid synchronization using a shadow component includes detecting a first component of a plurality of mirrored components of a distributed data object becoming unavailable. The mirrored components include a delta component (a special shadow component) and a regular mirror (shadow) component. The delta component indicates a shorter history of changes to data blocks of a log-structured file system (LFS) than is indicated by the regular mirror component. During the unavailability of the first component, at least one write I/O is committed by the delta component. The commit is tracked by the delta component in a first tracking bitmap associated with the delta component. Based at least on detecting the first component becoming available, the first component is synchronized with data from the delta component, based at least on changed data blocks indicated in the first tracking bitmap.

公开(公告)号：US20230153269A1

公开(公告)日：2023-05-18

申请号：US17455519

申请日：2021-11-18

Applicant: VMware, Inc.

Inventor： Enning XIANG ,  Wenguang WANG ,  Pranay SINGH

IPC: G06F16/11 ,  G06F16/14

CPC classification number: G06F16/128 ,  G06F16/125 ,  G06F16/14

Abstract: A method for the reverse deletion of a plurality of snapshots in a chain of snapshots is provided. The method includes in reverse order, starting from a latest snapshot in time to an earliest snapshot in time of the plurality of snapshots: identifying at least one of a first set of one or more data blocks of a snapshot that are shared with an earlier snapshot in time in the chain of snapshots or a second set of one or more data blocks of the snapshot that are owned by the snapshot and processing the second set of one or more data blocks and skipping processing the first set of one or more data blocks, wherein processing the second set of one or more data blocks comprises performing one or more actions to maintain and/or delete data blocks of the second set of one or more data blocks.

公开(公告)号：US20230023307A1

公开(公告)日：2023-01-26

申请号：US17384298

申请日：2021-07-23

Applicant: VMware, Inc.

Inventor： Enning XIANG ,  Wenguang WANG

IPC: G06F12/10

Abstract: Linked clone read performance (e.g., retrieving data) is improved at least by minimizing the number of input/output (I/O) operations. For a child clone, a local logical extent and an inherited logical extent are generated. The local logical extent comprises a logical block address (LBA) for data in a data region of the child clone and a physical sector address (PSA) corresponding to the LBA for the data in the data region of the child clone. The inherited logical extent spans logical extents that are accessible to the child clone. The inherited logical extent comprises an LBA for data in a data region of an ancestor of the child clone and a corresponding identifier (ID) of the ancestor. Data for an LBA in a read request may be rapidly found in the child clone (local logical extent) or an ancestor (inherited logical extent).

公开(公告)号：US20230004525A1

公开(公告)日：2023-01-05

申请号：US17367233

申请日：2021-07-02

Applicant: VMware, Inc.

Inventor： Asit DESAI ,  Abhay Kumar JAIN ,  Wenguang WANG ,  Eric KNAUFT ,  Enning XIANG

IPC: G06F16/11 ,  G06F16/14 ,  G06F12/10 ,  G06F3/06

Abstract: An example method of upgrading a distributed storage object from a first version to a second version includes: querying metadata of a first component configured according to the first version of the distributed storage object, the metadata defining extents of data on a disk group of the first component; populating, for a second component configured according to the second version of the distributed storage object, logical and middle maps based on the metadata such that initial entries in the logical map point to initial entries in the middle map, and the initial entries in the middle map point to physical addresses of the disk group of the first component; and reading the data from the disk group of the first component and writing the data to a disk group of the second component while updating the initial entries in the middle map.

公开(公告)号：US20220342543A1

公开(公告)日：2022-10-27

申请号：US17239025

申请日：2021-04-23

Applicant: VMware, Inc.

Inventor： Enning XIANG ,  Wenguang WANG

IPC: G06F3/06 ,  G06F12/02

Abstract: A method for block addressing is provided. The method includes moving content of a data block referenced by a logical block address (LBA) from a first physical block corresponding to a first physical block address (PBA) to a second physical block corresponding to a second PBA, wherein prior to the moving a logical map maps the LBA to a middle block address (MBA) and a middle map maps the MBA to the first PBA and in response to the moving, updating the middle map to map the MBA to the second PBA instead of the first PBA.

公开(公告)号：US20190052708A1

公开(公告)日：2019-02-14

申请号：US15674375

申请日：2017-08-10

Applicant: VMware, Inc.

Inventor： Enning XIANG ,  Pascal RENAULD ,  Eric KNAUFT

IPC: H04L29/08 ,  G06F9/44 ,  H04L12/24 ,  G06F17/30 ,  G06F13/10

Abstract: Exemplary methods, apparatuses, and systems include a replica node storing a component of a storage object detecting that a primary coordinator for the storage object component is no longer available to serve as primary coordinator. The replica node is within a cluster of nodes storing components of the storage object. In response to detecting that the primary coordinator is no longer available, the replica node updates a first metadata entry indicating that a secondary coordinator for the storage object component is unhealthy. The replica node rejects connection requests from the secondary coordinator in response to the first metadata entry indicating that the secondary coordinator for the storage object component is unhealthy.