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21.发明授权公开(公告)号：US11144394B1
公开(公告)日：2021-10-12
申请号：US16894646
申请日：2020-06-05
Applicant: VMware, Inc.
Inventor： Wenguang Wang , Eric Knauft , Vamsidhar Gunturu
Abstract: Systems, for managing metadata data blocks, include a fast performance tier and a large capacity tier. The capacity tier stores the data blocks in erasure-encoded stripes. The performance tier stores map data indicating correspondences between logical addresses, associated with a first layer of the system, and physical addresses associated with a second layer. The map data is structured as a B-tree with leaf nodes and index nodes. A method includes determining a volume associated with the leaves. In response to the volume being greater than a threshold, migrating a portion of the leaves to the stripes of the capacity tier. A portion of the indexes that include pointers to the migrated portion of the leaves are updated to include updated pointers to physical addresses of the stripes that store the migrated leaves. A portion of the performance tier that stores the migrated leaves is re-allocated to store additional map data.
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公开(公告)号：US11088896B2
公开(公告)日：2021-08-10
申请号：US15652048
申请日：2017-07-17
Applicant: VMware, Inc.
Inventor： Wenguang Wang , Xiaoyun Gong
IPC: G06F15/16 , H04L12/24 , G06F9/455 , G06F16/901 , G06F16/903 , H04L29/14 , H04L12/26 , H04L29/06 , H04L29/08
Abstract: A data communication channel between a client and a service is preserved through a failure of the server by maintaining a request log and an inflight request queue in a protected memory region that preserves the contents of the request log and the inflight request queue even when the service encounters a failure. The method of restarting the data communication channel includes, upon the service being restarted following the failure of the service, determining whether the request log contains requests and, if so, copying the requests from the request log into the in-flight request queue and then removing the copied requests from the request log. The requests in the in-flight request queue, which include any that were in the in-flight request queue at the time of the failure of the service and any that were copied from the request log, are then processed.
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23.发明授权公开(公告)号：US11061594B1
公开(公告)日：2021-07-13
申请号：US16827674
申请日：2020-03-23
Applicant: VMware, Inc.
Inventor： Wenguang Wang , Vamsi Gunturu
Abstract: A method for encrypting data in one or more data blocks is provided. The method generates a fixed random tweak. The method receives first and second data blocks to write on at least one physical disk of a set of physical disks associated with a set of host machines. The method applies a fixed random tweak to data indicative of the first data block and data indicative of the second data block to generate, respectively, first and second encrypted data blocks. The method writes first and second entries to a data log in a cache, the first entry comprising a first header and the first encrypted data block and the second entry comprising a second header and the second encrypted data block. The method then writes the first and second encrypted data blocks to the at least one physical disk.
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公开(公告)号：US10977143B2
公开(公告)日：2021-04-13
申请号：US15844412
申请日：2017-12-15
Applicant: VMware, Inc.
Inventor： Abhishek Gupta , Richard P. Spillane , Kapil Chowksey , Rob Johnson , Wenguang Wang
Abstract: Data storage system and method for managing transaction requests to the data storage system utilizes an active write ahead log and a standby write ahead log to apply the transaction requests to a storage data structure stored in a storage system of the data storage system.
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25.发明授权公开(公告)号：US10666435B2
公开(公告)日：2020-05-26
申请号：US15866278
申请日：2018-01-09
Applicant: VMware, Inc.
Inventor： Wenguang Wang , Jin Zhang , Haoran Zheng , Eric Knauft , Xin Li , Pascal Renauld , Bryan Fink
Abstract: A tenant's clear text data in a multi-tenant storage system can be encrypted using the tenant's cryptographic key to produce encrypted yet compressible data (“cryptographic data”). The cryptographic data can be encrypted using a system cryptographic key that is managed by the multi-tenant storage system and then stored. Use of the system cryptographic key allows for subsequent maintenance activities such as deduplication and compression to be performed on data stored in the multi-tenant storage system without having to access any of the tenants' cryptographic keys.
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Patent Agency Ranking
公开(公告)号：US10528459B2
公开(公告)日：2020-01-07
申请号：US14713698
申请日：2015-05-15
Applicant: VMware, Inc.
Inventor： Wenguang Wang , Yunshan Lu
Abstract: Systems and methods for allocating space in persistent storage are provided. A modified bitmap and a tree of bitmap summary pages are used to manage the free space of a large scale storage system. The bitmap is separated into fixed size pages and has bitmap summary entries to summarize the information in the bitmap. Bitmap summary pages can be further summarized into secondary summary pages. The tree data structure can continue to N levels until a topmost level has one bitmap summary page.
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27.发明授权公开(公告)号：US10445409B2
公开(公告)日：2019-10-15
申请号：US14973415
申请日：2015-12-17
Applicant: VMware, Inc.
Inventor： Richard P. Spillane , Yunshan Lu , Wenguang Wang
Abstract: System and method for supporting a user-level file system transaction use cloned files of original existing files specified in the user-level file system transaction to perform file system operations on at least one of the original existing files using the cloned files, which include metadata of the original existing files. After at least one of the cloned files have been modified, a batch rename operation is executed to atomically commit every modified cloned file of the user-level file system transaction.
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公开(公告)号：US20190108104A1
公开(公告)日：2019-04-11
申请号：US15727211
申请日：2017-10-06
Applicant: VMware, Inc.
Inventor： Abhishek Gupta , Richard P. Spillane , Kapil Chowksey , Rob Johnson , Wenguang Wang
CPC classification number: G06F11/1471 , G06F11/1474 , G06F16/2246 , G06F16/2358 , G06F2201/825 , G06F2201/87
Abstract: Data storage system and method for managing transaction requests to the data storage system utilizes a write ahead log to write transaction requests received at the data storage system during a current checkpoint generation. After the transaction requests in the write ahead log are applied to a copy-on-write (COW) storage data structure stored in a storage system, one of first and second allocation bitmaps is updated to reflect changes in the COW storage data structure with respect to allocation of storage space in the storage system, and one of first and second super blocks is updated with references to central nodes of the COW storage data structure. After the allocation bitmap and the super block have been updated, an end indicator for the current checkpoint generation is written in the write ahead log to indicate that processing of the transaction requests for the current checkpoint generation has been completed.
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公开(公告)号：US10176209B2
公开(公告)日：2019-01-08
申请号：US14752175
申请日：2015-06-26
Applicant: VMware, Inc.
Inventor： Yunshan Lu , Wenguang Wang
IPC: G06F12/02 , G06F17/30 , G06F12/0875
Abstract: A transaction manager for handling operations on data in a storage system provides a system for executing transactions that uses a versioned tuple cache to achieve fast, abortable transactions using a redo-only log. The transaction manager updates an in-memory key-value store and also attaches a transaction identifier to the tuple as a minor key. Opportunistic locking can be accomplished due to the low cost of aborting transactions.
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公开(公告)号：US20180357176A1
公开(公告)日：2018-12-13
申请号：US15622014
申请日：2017-06-13
Applicant: VMware, Inc.
Inventor： Wenguang Wang
IPC: G06F12/0888 , G06F12/084 , G06F12/1045
CPC classification number: G06F12/0888 , G06F12/084 , G06F12/1063
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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