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公开(公告)号：US10417193B2
公开(公告)日：2019-09-17
申请号：US15163471
申请日：2016-05-24
Applicant: VMware, Inc.
Inventor： Wenguang Wang , Yunshan Lu
IPC: G06F16/182
Abstract: Exemplary methods, apparatuses, and systems include a controller node receiving a request to perform a consistency check of a distributed file system. The controller node transmits, to each of a plurality of nodes, a request for the node to use logical metadata of the distributed file system owned by the node to construct an expected copy of physical metadata mapped to the logical metadata, determine which of the plurality of nodes own actual portions of the physical metadata, transmit corresponding portions of the expected copy of the physical metadata to each of the nodes determined to own actual portions of the physical metadata, and compare expected copies of the physical metadata received from other nodes to the actual physical metadata owned by the node. The controller node receives a result of the comparison from each of the nodes, aggregates the received results, and generates an error report.
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122.发明申请公开(公告)号：US20190227727A1
公开(公告)日：2019-07-25
申请号：US15880391
申请日：2018-01-25
Applicant: VMware, Inc.
Inventor： Wenguang Wang , Christos Karamanolis , Srinath Premachandran
Abstract: A method includes obtaining a plurality of representations corresponding respectively to a plurality of blocks of data stored on a source node. A plurality of data pairs are sent to a destination node, where each data pair includes a logical address associated with a block of data from the plurality of blocks of data and the corresponding representation of the block of data. A determination is made whether the blocks of data associated with the respective logical addresses are duplicates of data stored on the destination node. In accordance with an affirmative determination, a reference to a physical address of the block of data stored on the destination node is stored. In accordance with a negative determination, an indication that the data corresponding to the respective logical address is not a duplicate is stored. The data indicated as not being a duplicate is written to the destination node.
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公开(公告)号：US10235298B2
公开(公告)日：2019-03-19
申请号：US15622014
申请日：2017-06-13
Applicant: VMware, Inc.
Inventor： Wenguang Wang
IPC: G06F12/0888 , G06F12/084 , G06F12/1045
Abstract: Techniques for implementing a shared data cache for kernel bypass applications are provided. In one set of embodiments, a shared data caching (SDC) service associated with an instance of a kernel bypass application can create a named shared memory region in user space, where the kernel bypass application is configured to use a user-level Input/Output (I/O) stack for accessing a physical I/O device. The SDC service can further map the named shared memory region into a virtual memory address space of the instance. Then, at a time the instance issues an I/O read request to the physical I/O device, the SDC service can process the I/O read request by accessing the named shared memory region as a data cache.
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公开(公告)号：US20180373727A1
公开(公告)日：2018-12-27
申请号：US15633726
申请日：2017-06-26
Applicant: VMware, Inc.
Inventor： Li Ding , Richard P. Spillane , Wenguang Wang
IPC: G06F17/30
Abstract: System and method for managing leaf nodes of a B-tree for a file system of a computer system utilize used slots in a directory section of a leaf node to index variable size key-value pair entries stored in a data section of the leaf node and free spaces slots in the directory section to index contiguous free spaces in the data section. Contents of the free space slots in the directory section are updated in response to changes in the contiguous free spaces in the data section to manage free space in the data section of the leaf node.
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公开(公告)号：US09892004B2
公开(公告)日：2018-02-13
申请号：US14857845
申请日：2015-09-18
Applicant: VMWARE, INC.
Inventor： Radu Berinde , Wenguang Wang
CPC classification number: G06F11/1469 , G06F3/0619 , G06F3/0629 , G06F3/0673 , G06F11/1402 , G06F11/1415 , G06F11/1471 , G06F2201/81 , G06F2201/84
Abstract: Techniques for efficiently storing the state of an in-memory table to persistent storage are described. In one embodiment, one or more requests to update an entry in an in-memory table with one or more values are received, wherein the in-memory table is stored in non-persistent memory. The one or more entries in the in-memory table are then updated with the one or more values and one or more recent redo log entries that correspond to the one or more entries and one or more values are generated. One or more historical entries in the table are selected and one or more historical redo log entries that correspond to the one or more historical entries are generated. The recent redo log entry and the one or more historical redo log entries are saved to a bounded redo log, wherein the bounded redo log is stored in persistent storage.
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Patent Agency Ranking
公开(公告)号：US20170344597A1
公开(公告)日：2017-11-30
申请号：US15163471
申请日：2016-05-24
Applicant: VMware, Inc.
Inventor： Wenguang Wang , Yunshan Lu
IPC: G06F17/30
CPC classification number: G06F16/182 , G06F16/184
Abstract: Exemplary methods, apparatuses, and systems include a controller node receiving a request to perform a consistency check of a distributed file system. The controller node transmits, to each of a plurality of nodes, a request for the node to use logical metadata of the distributed file system owned by the node to construct an expected copy of physical metadata mapped to the logical metadata, determine which of the plurality of nodes own actual portions of the physical metadata, transmit corresponding portions of the expected copy of the physical metadata to each of the nodes determined to own actual portions of the physical metadata, and compare expected copies of the physical metadata received from other nodes to the actual physical metadata owned by the node. The controller node receives a result of the comparison from each of the nodes, aggregates the received results, and generates an error report.
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公开(公告)号：US09760493B1
公开(公告)日：2017-09-12
申请号：US15069389
申请日：2016-03-14
Applicant: VMware, Inc.
Inventor： Wenguang Wang
IPC: G06F12/12 , G06F12/0868 , G06F12/121 , G06F12/122 , G06F12/127
CPC classification number: G06F12/0868 , G06F12/0895 , G06F12/121 , G06F12/122 , G06F12/127 , G06F2212/1024 , G06F2212/1056 , G06F2212/152
Abstract: A method of updating a cache data structure that includes first, second, and third queues includes the step of storing contents of a data item in a cache location in response to a read or write input/output operation (IO) that accesses the data item. If the data item is not tracked in any of the first, second, and third queues, the data item is added to the first queue with the cache location of the data item. On the other hand, if the data item is tracked in the second queue, the data item is added to the third queue with the cache location of the data item.
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公开(公告)号：US20160350325A1
公开(公告)日：2016-12-01
申请号：US14724392
申请日：2015-05-28
Applicant: VMware, Inc.
Inventor： Wenguang Wang , Radu Berinde , Christos Karamanolis , Jorge Guerra Delgado , Srinath Premachandran
IPC: G06F17/30
CPC classification number: G06F3/0608 , G06F3/0619 , G06F3/0641 , G06F3/065 , G06F3/067 , G06F17/30156
Abstract: A method and system are disclosed for storing client data objects in a deduplicated storage system. Deduplicated data may be stored in a plurality of physical data blocks. A content map layer can provide a mapping between the physical data blocks to logical map objects associated with the client data objects. The deduplicated data may be mapped to logical data blocks that comprise the client data objects.
Abstract translation: 公开了一种用于将客户端数据对象存储在重复数据删除的存储系统中的方法和系统。 重复数据可以存储在多个物理数据块中。 内容映射图层可以提供物理数据块与与客户端数据对象相关联的逻辑映射对象之间的映射。 重复数据删除的数据可以映射到构成客户数据对象的逻辑数据块。
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公开(公告)号：US12124701B2
公开(公告)日：2024-10-22
申请号：US18159656
申请日：2023-01-25
Applicant: VMware, Inc.
Inventor： Wenguang Wang , Eric Knauft , Sudheer Thokala
IPC: G06F3/06
CPC classification number: G06F3/061 , G06F3/0652 , G06F3/0679
Abstract: Components of a distributed data object are synchronized using streamlined tracking metadata. A target component of the distributed data object is detected as it becomes available and stale. A source component that is up-to-date and that mirrors the address space of the detected target component is identified. A set of mapped address ranges and a set of unmapped address ranges of the identified source component are obtained. A mapped address range of the target component that corresponds with an unmapped address range of the source component is identified. The identified mapped address range of the target component is then synchronized with the corresponding unmapped address range of the source component. Thus, unmapped address ranges are synchronized without using tracking metadata of the source component.
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公开(公告)号：US11907161B2
公开(公告)日：2024-02-20
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
CPC classification number: G06F16/122 , G06F3/0604 , G06F3/067 , G06F3/0659 , G06F3/0664 , G06F12/10 , G06F16/148
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.
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