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公开(公告)号：US11573741B2
公开(公告)日：2023-02-07
申请号：US17398021
申请日：2021-08-10
Applicant: VMWARE, INC.
Inventor： Prasanna Aithal , Rohan Pasalkar , Prasad Rao Jangam , Srinivasa Shantharam , Mahesh Hiregoudar , Srikanth Mahabalarao
IPC: G06F3/06 , G06F9/455 , G06F16/188
Abstract: An example method of handling, at a hypervisor on a host in a virtualized computing system, a write input/output (IO) operation to a file on a storage device having a virtual machine file system (VMFS) is described. The method includes: sorting, at the hypervisor, a scatter-gather array for the write IO operation into sets of scatter-gather elements, each of the sets including at least one scatter-gather element targeting a common file block address; resolving offsets of the sets of scatter-gather elements to identify a first scatter-gather array of transaction-dependent scatter-gather elements; generating logical transactions for the first scatter-gather array having updates to metadata of the VMFS for the file; batching the logical transactions into a physical transaction; and executing the physical transaction to commit the updates to the metadata of the VMFS on the storage device for the file.
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公开(公告)号：US20220413700A1
公开(公告)日：2022-12-29
申请号：US17399098
申请日：2021-08-11
Applicant: VMWARE, INC.
Inventor： Mahesh Hiregoudar , Prasanna Aithal , Prasad Rao Jangam , Srinivasa Shantharam , Rohan Pasalkar , Srikanth Mahabalarao
IPC: G06F3/06
Abstract: A method of deleting a first pointer block of a plurality of pointer blocks of a file system from a storage device used by a plurality of applications, wherein the plurality of pointer blocks are each subdivided into sub-blocks, includes the steps of: determining that a first sub-block of the first pointer block is marked as being empty of any addresses of the file system at which storage space is allocated to files of the applications; determining that a second sub-block of the first pointer block has not been marked as being empty; in response to the determining that the second sub-block has not been marked as being empty, determining that the second sub-block does not contain any addresses of the file system at which storage space is allocated to the files of the applications; and deleting the first pointer block from the storage device.
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公开(公告)号：US10740227B2
公开(公告)日：2020-08-11
申请号：US15644854
申请日：2017-07-10
Applicant: VMWARE, INC.
Inventor： Pradeep Krishnamurthy , Prasanna Aithal , Asit Desai , Bryan Branstetter , Mahesh S Hiregoudar , Prasad Rao Jangam , Rohan Pasalkar , Srinivasa Shantharam , Raghavan Pichai
Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for reclaiming one or more portions of storage resources in a computer system serving one or more virtual computing instances, where the storage resources in the computer system are organized in clusters of storage blocks. In one aspect, a method includes maintaining a respective block tracking value for each storage block that indicates whether a call to reclaim the storage block is outstanding; determining, from the block tracking values, a respective cluster priority value for each of the clusters based on a count of storage blocks in the respective cluster for which a call to reclaim is outstanding; and reclaiming a first portion of storage resources in the computer system in accordance with the cluster priority values.
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公开(公告)号：US12050926B2
公开(公告)日：2024-07-30
申请号：US17463573
申请日：2021-09-01
Applicant: VMWARE, INC.
Inventor： Prasanna Aithal , Prasad Rao Jangam , Srinivasa Shantharam , Mahesh Hiregoudar , Rohan Pasalkar , Srikanth Mahabalarao
IPC: G06F9/455 , G06F9/46 , G06F16/13 , G06F16/188
CPC classification number: G06F9/45558 , G06F9/466 , G06F16/13 , G06F16/188 , G06F2009/45579
Abstract: An example method of handling, at a hypervisor on a host in a virtualized computing system, a write input/output (IO) operation to a file on a storage device having a virtual machine file system (VMFS) is described. The method includes: generating logical transactions for the write IO operation having updates to metadata of the VMFS for the file; estimating, for the logical transactions, common space reservations for those of the updates to common fields in the metadata for the file; estimating, for the logical transactions, exclusive space reservations for those of the updates to exclusive fields in the metadata for the file; batching the logical transactions into a physical transaction, which includes a single reservation of space in a journal of the VMFS based on the common space reservations and a reservations of space in the journal for each of the exclusive space reservations, respectively.
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公开(公告)号：US11640375B2
公开(公告)日：2023-05-02
申请号：US17398065
申请日：2021-08-10
Applicant: VMWARE, INC.
Inventor： Mahesh Hiregoudar , Prasanna Aithal , Prasad Rao Jangam , Srinivasa Shantharam , Rohan Pasalkar , Srikanth Mahabalarao
IPC: G06F16/178 , G06F16/17 , G06F16/188 , G06F16/176
Abstract: A method of synchronously executing input/output operations (IOs) for a plurality of applications using a storage device with a file system includes the steps of: receiving a first write IO including an instruction to write first data at a first address of the file system; determining that, within a first range of the file system comprising the first address, there are no pending unmap IOs for deallocating storage space of the storage device from files of the plurality of applications; after determining that there are no pending unmap IOs within the first range, locking the first range to prevent incoming unmap IOs from deallocating storage space within the first range from the files of the plurality of applications; after locking the first range, writing the first data to the storage device at the first address; and after writing the first data, unlocking the first range.
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Patent Agency Ranking
公开(公告)号：US10599366B2
公开(公告)日：2020-03-24
申请号：US15598345
申请日：2017-05-18
Applicant: VMWARE, INC.
Inventor： Asit Desai , Prasanna Aithal , Prasad Rao Jangam , Bryan Branstetter , Mahesh S Hiregoudar , Pradeep Krishnamurthy , Rohan Pasalkar , Raghavan Pichai , Srinivasa Shantharam
IPC: G06F3/06
Abstract: A distributed file system may be configured with file blocks of a first type and file blocks of a second type, from allocation units that comprise a logical volume containing the file system. File blocks of the second type may be defined from one or more file blocks of the first type. A thick file may be instantiated with a number of allocation units totaling a size greater than or equal to a specified file size of the thick file. The allocation units may be allocated to the thick file in units of file blocks of the first type or file blocks of the second type, depending on the specified file size of the thick file.
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公开(公告)号：US20180267894A1
公开(公告)日：2018-09-20
申请号：US15672339
申请日：2017-08-09
Applicant: VMWARE, INC.
Inventor： PRASAD RAO JANGAM , Asit Desai , Prasanna Aithal , Bryan Branstetter , Mahesh S Hiregoudar , Srinivasa Shantharam , Pradeep Krishnamurthy , Raghavan Pichai , Rohan Pasalkar
CPC classification number: G06F12/0246 , G06F3/0608 , G06F3/0619 , G06F3/0641 , G06F3/0662 , G06F3/067
Abstract: The systems described herein are configured to enhance the efficiency of memory in a host file system with respect to hosted virtual file systems. In situations when the hosted virtual file systems use smaller file block sizes than the file block sizes of the host file system. During storage of a file, a file block is assigned a block address and unmapping bits. The block address and unmapping bits are stored in a pointer block or other similar data structure associated with the file. Particularly, the block address is stored in a first address block and the unmapping bits are stored in at least one additional address block located in proximity to the block address, such that the unmap granularity of the file is not limited by the fixed size of address blocks in the system.
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公开(公告)号：US11531481B1
公开(公告)日：2022-12-20
申请号：US17399098
申请日：2021-08-11
Applicant: VMWARE, INC.
Inventor： Mahesh Hiregoudar , Prasanna Aithal , Prasad Rao Jangam , Srinivasa Shantharam , Rohan Pasalkar , Srikanth Mahabalarao
IPC: G06F3/06
Abstract: A method of deleting a first pointer block of a plurality of pointer blocks of a file system from a storage device used by a plurality of applications, wherein the plurality of pointer blocks are each subdivided into sub-blocks, includes the steps of: determining that a first sub-block of the first pointer block is marked as being empty of any addresses of the file system at which storage space is allocated to files of the applications, determining that a second sub-block of the first pointer block has not been marked as being empty; in response to the determining that the second sub-block has not been marked as being empty, determining that the second sub-block does not contain any addresses of the file system at which storage space is allocated to the files of the applications; and deleting the first pointer block from the storage device.
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公开(公告)号：US20220365722A1
公开(公告)日：2022-11-17
申请号：US17398021
申请日：2021-08-10
Applicant: VMWARE, INC.
Inventor： PRASANNA AITHAL , Rohan Pasalkar , Prasad Rao Jangam , Srinivasa Shantharam , Mahesh Hiregoudar , Srikanth Mahabalarao
IPC: G06F3/06 , G06F9/455 , G06F16/188
Abstract: An example method of handling, at a hypervisor on a host in a virtualized computing system, a write input/output (IO) operation to a file on a storage device having a virtual machine file system (VMFS) is described. The method includes: sorting, at the hypervisor, a scatter-gather array for the write IO operation into sets of scatter-gather elements, each of the sets including at least one scatter-gather element targeting a common file block address; resolving offsets of the sets of scatter-gather elements to identify a first scatter-gather array of transaction-dependent scatter-gather elements; generating logical transactions for the first scatter-gather array having updates to metadata of the VMFS for the file; batching the logical transactions into a physical transaction; and executing the physical transaction to commit the updates to the metadata of the VMFS on the storage device for the file.
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公开(公告)号：US11341044B2
公开(公告)日：2022-05-24
申请号：US16926336
申请日：2020-07-10
Applicant: VMware, Inc.
Inventor： Pradeep Krishnamurthy , Prasanna Aithal , Asit Desai , Bryan Branstetter , Mahesh S. Hiregoudar , Prasad Rao Jangam , Rohan Pasalkar , Srinivasa Shantharam , Raghavan Pichai
Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for reclaiming one or more portions of storage resources in a computer system serving one or more virtual computing instances, where the storage resources in the computer system are organized in clusters of storage blocks. In one aspect, a method includes maintaining a respective block tracking value for each storage block that indicates whether a call to reclaim the storage block is outstanding; determining, from the block tracking values, a respective cluster priority value for each of the clusters based on a count of storage blocks in the respective cluster for which a call to reclaim is outstanding; and reclaiming a first portion of storage resources in the computer system in accordance with the cluster priority values.
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