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公开(公告)号：US11782828B2
公开(公告)日：2023-10-10
申请号：US17571417
申请日：2022-01-07
申请人： VMware, Inc.
发明人： Xavier Deguillard , Ishan Banerjee , Julien Freche , Kiran Tati , Preeti Agarwal , Rajesh Venkatasubramanian
IPC分类号： G06F12/00 , G06F12/02 , G06F12/1009 , G06F12/0804
CPC分类号： G06F12/0253 , G06F12/0804 , G06F12/1009 , G06F2212/1044 , G06F2212/202 , G06F2212/657
摘要： Techniques for efficiently purging non-active blocks in an NVM region of an NVM device using virtblocks are provided. In one set of embodiments, a host system can maintain, in the NVM device, a pointer entry (i.e., virtblock entry) for each allocated data block of the NVM region, where page table entries of the NVM region that refer to the allocated data block include pointers to the pointer entry, and where the pointer entry includes a pointer to the allocated data block. The host system can further determine that a subset of the allocated data blocks of the NVM region are non-active blocks and can purge the non-active blocks from the NVM device to a mass storage device, where the purging comprises updating the pointer entry for each non-active block to point to a storage location of the non-active block on the mass storage device.
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公开(公告)号：US11249900B2
公开(公告)日：2022-02-15
申请号：US16174249
申请日：2018-10-29
申请人： VMware, Inc.
发明人： Xavier Deguillard , Ishan Banerjee , Julien Freche , Kiran Tati , Preeti Agarwal , Rajesh Venkatasubramanian
IPC分类号： G06F12/00 , G06F12/02 , G06F12/1009 , G06F12/0804
摘要： Techniques for efficiently purging non-active blocks in an NVM region of an NVM device using virtblocks are provided. In one set of embodiments, a host system can maintain, in the NVM device, a pointer entry (i.e., virtblock entry) for each allocated data block of the NVM region, where page table entries of the NVM region that refer to the allocated data block include pointers to the pointer entry, and where the pointer entry includes a pointer to the allocated data block. The host system can further determine that a subset of the allocated data blocks of the NVM region are non-active blocks and can purge the non-active blocks from the NVM device to a mass storage device, where the purging comprises updating the pointer entry for each non-active block to point to a storage location of the non-active block on the mass storage device.
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公开(公告)号：US10929233B2
公开(公告)日：2021-02-23
申请号：US15881379
申请日：2018-01-26
申请人： VMware, Inc.
发明人： Pratap Subrahmanyam , Rajesh Venkatasubramanian , Kiran Tati , Qasim Ali , Marcos Aguilera , Irina Calciu , Venkata Subhash Reddy Peddamallu , Xavier Deguillard , Yi Yao
摘要： Techniques for achieving application high availability via application-transparent battery-backed replication of persistent data are provided. In one set of embodiments, a computer system can detect a failure that causes an application of the computer system to stop running. In response to detecting the failure, the computer system can copy persistent data written by the application and maintained locally at the computer system to one or more remote destinations, where the copying is performed in a manner that is transparent to the application and while the computer system runs on battery power. The application can then be restarted on another computer system using the copied data.
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公开(公告)号：US20190179794A1
公开(公告)日：2019-06-13
申请号：US15836577
申请日：2017-12-08
申请人： VMware, Inc.
发明人： Michael Wei , Marcos Aguilera , Irina Calciu , Stanko Novakovic , Lalith Suresh , Jayneel Gandhi , Nadav Amit , Pratap Subrahmanyam , Xavier Deguillard , Kiran Tati , Rajesh Venkatasubramanian
IPC分类号： G06F15/173 , G06F17/30
CPC分类号： G06F15/17331 , G06F16/183
摘要： Exemplary methods, apparatuses, and systems include a distributed memory agent within a first node intercepting an operating system request to open a file from an application running on the first node. The request includes a file identifier, which the distributed memory agent transmits to a remote memory manager. The distributed memory agent receives, from the remote memory manager, a memory location within a second node for the file identifier and information to establish a remote direct memory access channel between the first node and the second node. In response to the request to open the file, the distributed memory agent establishes the remote direct memory access channel between the first node and the second node. The remote direct memory access channel allows the first node to read directly from or write directly to the memory location within the second node while bypassing an operating system of the second node.
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公开(公告)号：US11720447B2
公开(公告)日：2023-08-08
申请号：US17144082
申请日：2021-01-07
申请人： VMware, Inc.
发明人： Pratap Subrahmanyam , Rajesh Venkatasubramanian , Kiran Tati , Qasim Ali , Marcos Aguilera , Irina Calciu , Venkata Subhash Reddy Peddamallu , Xavier Deguillard , Yi Yao
CPC分类号： G06F11/1438 , G06F1/263 , G06F11/1464 , G06F11/1471 , G06F11/1484 , G06F11/2025 , G06F16/27 , G06F2201/805 , G06F2201/82 , G06F2201/84 , G06F2201/85
摘要： Techniques for achieving application high availability via application-transparent battery-backed replication of persistent data are provided. In one set of embodiments, a computer system can detect a failure that causes an application of the computer system to stop running. In response to detecting the failure, the computer system can copy persistent data written by the application and maintained locally at the computer system to one or more remote destinations, where the copying is performed in a manner that is transparent to the application and while the computer system runs on battery power. The application can then be restarted on another computer system using the copied data.
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公开(公告)号：US20210133032A1
公开(公告)日：2021-05-06
申请号：US17144082
申请日：2021-01-07
申请人： VMware, Inc.
发明人： Pratap Subrahmanyam , Rajesh Venkatasubramanian , Kiran Tati , Qasim Ali , Marcos Aguilera , Irina Calciu , Venkata Subhash Reddy Peddamallu , Xavier Deguillard , Yi Yao
摘要： Techniques for achieving application high availability via application-transparent battery-backed replication of persistent data are provided. In one set of embodiments, a computer system can detect a failure that causes an application of the computer system to stop running. In response to detecting the failure, the computer system can copy persistent data written by the application and maintained locally at the computer system to one or more remote destinations, where the copying is performed in a manner that is transparent to the application and while the computer system runs on battery power. The application can then be restarted on another computer system using the copied data.
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公开(公告)号：US10936446B2
公开(公告)日：2021-03-02
申请号：US15889162
申请日：2018-02-05
申请人： VMware, Inc.
摘要： A journal-based process to achieve atomicity in a device driver write operation includes committing a transaction associated with the operation to a journal that include a status indicating the target block is corrupted. Subsequent to committing the transaction, the data is written to the target block. If the write operation is successfully committed, the transaction can be deleted from the journal. If a system crash occurs (e.g., power failure) before the write operation is successfully committed, the transaction remains in the journal and can be used to update block metadata associated with the target block when the system reboots to indicate that it is corrupted; e.g., the target block is a torn write.
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公开(公告)号：US10705954B2
公开(公告)日：2020-07-07
申请号：US16174270
申请日：2018-10-29
申请人： VMware, Inc.
发明人： Rajesh Venkatasubramanian , Ishan Banerjee , Julien Freche , Kiran Tati , Preeti Agarwal , Xavier Deguillard
IPC分类号： G06F13/00 , G06F12/02 , G06F12/0804 , G06F12/1009
摘要： Techniques for efficiently purging non-active blocks in an NVM region of an NVM device while preserving large pages are provided. In one set of embodiments, a host system can receive a write request with respect to a data block of the NVM region, where the data block is referred to by a snapshot of the NVM region and was originally allocated as part of a large page. The host system can further allocate a new data block in the NVM region, copy contents of the data block to the new data block, and update the data block with write data associated with the write request. The host system can then update a level 1 (L1) page table entry of the NVM region's running point to point to the original data block.
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公开(公告)号：US20200133847A1
公开(公告)日：2020-04-30
申请号：US16174270
申请日：2018-10-29
申请人： VMware, Inc.
发明人： Rajesh Venkatasubramanian , Ishan Banerjee , Julien Freche , Kiran Tati , Preeti Agarwal , Xavier Deguillard
IPC分类号： G06F12/02 , G06F12/0804 , G06F12/1009
摘要： Techniques for efficiently purging non-active blocks in an NVM region of an NVM device while preserving large pages are provided. In one set of embodiments, a host system can receive a write request with respect to a data block of the NVM region, where the data block is referred to by a snapshot of the NVM region and was originally allocated as part of a large page. The host system can further allocate a new data block in the NVM region, copy contents of the data block to the new data block, and update the data block with write data associated with the write request. The host system can then update a level 1 (L1) page table entry of the NVM region's running point to point to the original data block.
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10.发明授权公开(公告)号：US10929235B2
公开(公告)日：2021-02-23
申请号：US15881514
申请日：2018-01-26
申请人： VMware, Inc.
发明人： Pratap Subrahmanyam , Rajesh Venkatasubramanian , Kiran Tati , Qasim Ali , Marcos Aguilera , Irina Calciu , Venkata Subhash Reddy Peddamallu , Xavier Deguillard , Yi Yao
摘要： Techniques for achieving application high availability via crash-consistent asynchronous replication of persistent data are provided. In one set of embodiments, an application running on a computer system can, during runtime of the application: write persistent data to a local nonvolatile data store of the computer system, write one or more log entries comprising the persistent data to a local log region of the computer system, and asynchronously copy the one or more log entries to one or more remote destinations. Then, upon detecting a failure that prevents the application from continuing execution, the computer system can copy the local log region or a remaining portion thereof to the one or more remote destinations, where the copying is performed while the computer system runs on battery power and where the application is restarted on another computer system using a persistent state derived from the copied log entries.
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