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11. 发明申请

US20150293717A1 MODULAR BLOCK-ALLOCATOR FOR DATA STORAGE SYSTEMS 有权
标题翻译：数据存储系统的模块化分配器
公开(公告)号：US20150293717A1
公开(公告)日：2015-10-15
申请号：US14748995
申请日：2015-06-24
申请人： NetApp, Inc.
发明人： Ram Kesavan , Mrinal K. Bhattacharjee , Sudhanshu Goswami
IPC分类号： G06F3/06
CPC分类号： G06F3/0619 , G06F3/064 , G06F3/0656 , G06F3/0665 , G06F3/067 , G06F3/0689 , G06F12/023 , G06F12/0866 , G06F17/30067 , G06F17/30132
摘要： A modular block allocator receives a cleaner message requesting dirty buffers associated with an Mode be cleaned. The modular block allocator provides at least one bucket cache comprising a plurality of buckets, wherein each bucket represents a plurality of free data blocks. The dirty buffers are cleaned by allocating the data blocks of one of the buckets to the dirty buffers. The allocated data blocks are mapped to a stripe set and when the stripe set is full, the stripe set is sent to a storage system. In one embodiment of the invention, a modular block allocator includes a front end module and a back end module communicating with each other via an application programming interface (API). The front end module contains write allocation policies that define how blocks are laid out on disk. The back end module creates data structures for execution of the policies.
摘要翻译：模块化块分配器接收更清晰的消息，请求与要清除的模式相关联的脏缓冲区。模块化块分配器提供包括多个桶的至少一个桶高速缓存，其中每个桶表示多个空闲数据块。通过将其中一个桶的数据块分配给脏缓冲区来清除脏缓冲区。分配的数据块被映射到条带集，并且当条带集已满时，条带集被发送到存储系统。在本发明的一个实施例中，模块化块分配器包括经由应用编程接口（API）彼此通信的前端模块和后端模块。前端模块包含写入分配策略，定义块如何布局在磁盘上。后端模块创建用于执行策略的数据结构。

12. 发明授权

US12141481B2 Write ordering for persistent memory 有权
公开(公告)号：US12141481B2
公开(公告)日：2024-11-12
申请号：US18513894
申请日：2023-11-20
申请人： NetApp Inc.
发明人： Ram Kesavan , Matthew Fontaine Curtis-Maury , Abdul Basit , Vinay Devadas , Ananthan Subramanian
IPC分类号： G06F12/00 , G06F3/06 , G06F11/14
CPC分类号： G06F3/0659 , G06F3/0619 , G06F3/0644 , G06F3/0653 , G06F3/067 , G06F3/0683 , G06F11/1417 , G06F11/1464 , G06F11/1469
摘要： Techniques are provided for implementing write ordering for persistent memory. A set of actions are identified for commitment to persistent memory of a node for executing an operation upon the persistent memory. An episode is created to comprise a first subset of actions of the set of actions that can be committed to the persistent memory in any order with respect to one another such that a consistent state of the persistent memory can be reconstructed in the event of a crash of the node during execution of the operation. The first subset of actions within the episode are committed to the persistent memory and further execution of the operation is blocked until the episode completes.

13. 发明授权

US12119836B2 File system format for persistent memory 有权
公开(公告)号：US12119836B2
公开(公告)日：2024-10-15
申请号：US18186657
申请日：2023-03-20
申请人： NetApp Inc.
发明人： Ram Kesavan , Matthew Fontaine Curtis-Maury , Abdul Basit , Vinay Devadas , Ananthan Subramanian , Mark Smith
IPC分类号： H03M1/12 , G06F3/06 , G06F16/901 , H03M1/06
CPC分类号： H03M1/0687 , G06F3/0604 , G06F3/0653 , G06F3/0685 , G06F16/9027 , H03M1/0695
摘要： Techniques are provided for compacting indirect blocks. For example, an object is represented as a structure including data blocks within which data of the object is stored and indirect blocks including block numbers of where the data blocks are located in storage. Block numbers within a set of indirect blocks are compacted into a compacted indirect block including a base block number, a count of additional block numbers after the base block number in the compacted indirect block, and a pattern of the block numbers in the compacted indirect block. The compacted indirect block is stored into memory for processing access operations to the object. Storing compacted indirect blocks into memory allows for more block numbers to be stored within memory.

14. 发明授权

US11994998B2 Low-overhead atomic writes for persistent memory 有权
公开(公告)号：US11994998B2
公开(公告)日：2024-05-28
申请号：US17750707
申请日：2022-05-23
申请人： NetApp Inc.
发明人： Matthew Fontaine Curtis-Maury , Vinay Devadas , Ananthan Subramanian , Ram Kesavan
IPC分类号： G06F12/0882 , G06F12/02 , G06F12/0871 , G06F16/182 , G06F16/22
CPC分类号： G06F12/0882 , G06F12/0246 , G06F12/0871 , G06F16/182 , G06F16/2246
摘要： Techniques are provided for atomic writes for persistent memory. In response to receiving a write operation, a new per-page structure with a new page block number is allocated. New data of the write operation is persisted to a new page of the persistent memory having the new page block number, and the new per-page structure is persisted to the persistent memory. If the write operation targets a hole after the new data and the new per-page structure have been persisted, then a new per-page structure identifier of the new per-page structure is inserted into a parent indirect page of a page comprising the new data. If the write operation targets old data after the new data and the new per-page structure have been persisted, then an old per-page structure of the old data is updated with the new page block number.

15. 发明公开

US20230376455A1 COORDINATING SNAPSHOT OPERATIONS ACROSS MULTIPLE FILE SYSTEMS 审中-公开
公开(公告)号：US20230376455A1
公开(公告)日：2023-11-23
申请号：US18361966
申请日：2023-07-31
申请人： NetApp Inc.
发明人： Ananthan Subramanian , Matthew Fontaine Curtis-Maury , Ram Kesavan , Rupa Natarajan , Vinay Devadas
IPC分类号： G06F16/11
CPC分类号： G06F16/128
摘要： Techniques are provided for coordinating snapshot operations across multiple file systems. A notification may be received that a snapshot of data stored across a persistent memory file system and a storage file system is to be generated. Forwarding, of modify operations from a persistent memory tier to a file system tier for execution through the storage file system, may be enabled. Framing may be initiated to notify the storage file system of blocks within the persistent memory file system that comprise more up-to-date data than corresponding blocks within the storage file system. In response to the framing completing, a consistency point operation is performed to create the snapshot and to create a snapshot image as part of the snapshot.

16. 发明申请

US20220283718A1 BLOCK ALLOCATION FOR PERSISTENT MEMORY DURING AGGREGATE TRANSITION 有权
公开(公告)号：US20220283718A1
公开(公告)日：2022-09-08
申请号：US17750793
申请日：2022-05-23
申请人： NetApp Inc.
发明人： Abdul Basit , Ananthan Subramanian , Ram Kesavan , Matthew Fontaine Curtis-Maury
IPC分类号： G06F3/06
摘要： Techniques are provided for block allocation for persistent memory during aggregate transition. In a high availability pair including first and second nodes, the first node makes a determination that control of a first aggregate is to transition from the first node to the second node. A portion of available free storage space is allocated from a first persistent memory of the first node as allocated pages within the first persistent memory. Metadata information for the allocated pages is updated with an identifier of the first aggregate to create updated metadata information reserving the allocated pages for the first aggregate. The updated metadata information is mirrored to the second node, so that the second node also reserves those pages. Control of the first aggregate is transitioned to the second node. As a result, the nodes do not attempt allocating the same free pages to different aggregates during a transition.

17. 发明申请

US20220138052A1 PERSISTENT MEMORY ARCHITECTURE 有权
公开(公告)号：US20220138052A1
公开(公告)日：2022-05-05
申请号：US17576981
申请日：2022-01-16
申请人： NetApp Inc.
发明人： Ananthan Subramanian , Ram Kesavan , Matthew Fontaine Curtis-Maury , Mark Smith
IPC分类号： G06F11/14 , G06F3/06 , G06F11/20
摘要： Techniques are provided for implementing a persistent memory storage tier to manage persistent memory of a node. The persistent memory is managed by the persistent memory storage tier at a higher level within a storage operating system storage stack than a level at which a storage file system of the node is managed. The persistent memory storage tier intercepts an operation targeting the storage file system. The persistent memory storage tier retargets the operation from targeting the storage file system to targeting the persistent memory. The operation is transmitted to the persistent memory.

18. 发明申请

US20210405894A1 BLOCK ALLOCATION FOR PERSISTENT MEMORY DURING AGGREGATE TRANSITION 有权
公开(公告)号：US20210405894A1
公开(公告)日：2021-12-30
申请号：US16911425
申请日：2020-06-25
申请人： NetApp Inc.
发明人： Abdul Basit , Ananthan Subramanian , Ram Kesavan , Matthew Fontaine Curtis-Maury
IPC分类号： G06F3/06
摘要： Techniques are provided for block allocation for persistent memory during aggregate transition. In a high availability pair including first and second nodes, the first node makes a determination that control of a first aggregate is to transition from the first node to the second node. A portion of available free storage space is allocated from a first persistent memory of the first node as allocated pages within the first persistent memory. Metadata information for the allocated pages is updated with an identifier of the first aggregate to create updated metadata information reserving the allocated pages for the first aggregate. The updated metadata information is mirrored to the second node, so that the second node also reserves those pages. Control of the first aggregate is transitioned to the second node. As a result, the nodes do not attempt allocating the same free pages to different aggregates during a transition.

19. 发明授权

US10552057B2 Methods for improving journal performance in storage networks and devices thereof 有权
公开(公告)号：US10552057B2
公开(公告)日：2020-02-04
申请号：US15167924
申请日：2016-05-27
申请人： NetApp, Inc.
发明人： Ram Kesavan , Ananthan Subramanian , Hiroshi Ishii , Abdul Basit , Joseph Brown, Jr. , Rohit Singh
IPC分类号： G06F3/06
摘要： A method, non-transitory computer readable medium and storage server computing device that determines when a generated storage operation corresponds with one of a set of predefined storage operations. The storage operation is executed and a result of the execution of the storage operation is withheld from a file system, when the determining indicates that the storage operation corresponds with one of the set of predefined storage operations. A determination is made when a consistency point operation has completed. The result of the execution of the storage operation is presented to the file system, when the determining indicates that a consistency point operation has completed. This technology reduces the number of storage operations that are required to be journaled to maintain consistency of a file system, thereby reducing the runtime resources required to facilitate the journaling and replay resource required to replay the storage operations in a journal following a recovery.

20. 发明授权

US10210056B2 Methods for filesystem metadata caching to improve failover performance and devices thereof 有权
公开(公告)号：US10210056B2
公开(公告)日：2019-02-19
申请号：US15087401
申请日：2016-03-31
申请人： NetApp, Inc.
发明人： Ram Kesavan , Ananthan Subramanian , Aziz Gulbeden , Christian Compton , Jawahar Tadipatri , Bipin Tomar , Joseph Allen Brown, Jr.
IPC分类号： G06F11/16 , G06F11/20 , G06F17/30 , G06F12/0802
摘要： A method, non-transitory computer readable medium, and device that assists with caching filesystem metadata to a partner non-volatile random-access memory (NVRAM) includes caching metadata related to an incoming data modifying operation generated by a client computing device to at least one storage controller device in a cluster. A service interruption event that makes a data block present in the storage device of a hosting storage node inaccessible to the client computing device is determined for during the caching. The requested metadata block from the at least one NVRAM is retrieved when the service interruption event is determined. The cache is warmed using the retrieved metadata block from the at least one NVRAM.

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