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公开(公告)号：US20210271659A1
公开(公告)日：2021-09-02
申请号：US16804170
申请日：2020-02-28
Applicant: NetApp Inc.
Abstract: Techniques are provided for maintaining timestamp parity during a transition replay phase to a synchronous state. During a transition logging phase where metadata operations executed by a primary node are logged into a metadata log and regions modified by data operations executed by the primary node are tracked within a dirty region log, a close stream operation to close a stream associated with a basefile of the primary node is identified. A determination is made as to whether the dirty region log comprises an entry for the stream indicating that a write data operation previously modified the stream. In an example, in response to the dirty region log comprising the entry, an indicator is set to specify that the stream was deleted by the close stream operation. In another example, a modify timestamp of the basefile is logged into the metadata log for subsequent replication to the secondary node.
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公开(公告)号：US11086551B2
公开(公告)日：2021-08-10
申请号：US16357407
申请日：2019-03-19
Applicant: NetApp Inc.
Abstract: Techniques are provided for freeing and utilizing unused inodes. For example, an operation, targeting a first storage object of a first node having a replication relationship with a second storage object of a second node, is intercepted. A replication operation is created as a replication of the operation. The operation is implemented upon the first storage object and the replication operation is implemented upon the second storage object. A determination is made that the replication operation uses an inode no longer used by storage objects of the second node. The inode targeted by the replication operation is freed and utilized based upon the inode being a leaf inode. If the inode is a stream directory inode, then data streams of the stream directory inode are moved under a new private inode and the stream directory inode is released.
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公开(公告)号：US20210081114A1
公开(公告)日：2021-03-18
申请号：US17106240
申请日：2020-11-30
Applicant: NetApp Inc.
IPC: G06F3/06
Abstract: Techniques are provided for persistent hole reservation. For example, hole reservation flags of operations targeting a first storage object of a first node are replicated into replication operations targeting a second storage object of a second node during a transition operation to transition the first storage object and the second storage object from an asynchronous replication state to a synchronous replication state. In another example, the second storage object is grown to a size of a replication punch hole operation that failed due to targeting a file block number greater than an end of size of the second storage object.
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公开(公告)号：US20200301886A1
公开(公告)日：2020-09-24
申请号：US16357387
申请日：2019-03-19
Applicant: NetApp Inc.
IPC: G06F16/178 , G06F21/62
Abstract: Techniques are provided for inofile management and access control list file handle parity. For example, operations targeting a first storage object of a first node are replicated to a second storage object of a second node. A size of an inofile maintained by the second node is increased if an inode number to be allocated by the replication operation is greater than a current size of the inofile. Access control list file handle parity is achieved by maintaining parity between inode number and generation number pairings of the first node and the second node.
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公开(公告)号：US20200050687A1
公开(公告)日：2020-02-13
申请号：US16191700
申请日：2018-11-15
Applicant: NetApp Inc.
IPC: G06F17/30
Abstract: Techniques are provided for resynchronizing a synchronous replication relationship. Asynchronous incremental transfers are performed to replicate data of a storage object to a replicated storage object. Incoming write requests, targeting the storage object, are logged into a dirty region log during a last asynchronous incremental transfer. Metadata operations, executed on the storage object, are logged into a metadata log during the last asynchronous incremental transfer. Sequence numbers are assigned to the metadata operations based upon an order of execution. The metadata operations are replicated to the replicated storage object for execution according to the sequence numbers, and the dirty regions are replicated to the replicated storage object in response to the metadata operations having been replicated to the replicated storage object. The storage object and replicated storage object are transitioned to a synchronous replication state where incoming operations are synchronously replicated to the replicated storage object.
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Patent Agency Ranking
公开(公告)号：US11797213B2
公开(公告)日：2023-10-24
申请号：US17396796
申请日：2021-08-09
Applicant: NetApp Inc.
CPC classification number: G06F3/065 , G06F3/067 , G06F3/0617 , G06F11/1464 , G06F11/2076
Abstract: Techniques are provided for freeing and utilizing unused inodes. For example, an operation, targeting a first storage object of a first node having a replication relationship with a second storage object of a second node, is intercepted. A replication operation is created as a replication of the operation. The operation is implemented upon the first storage object and the replication operation is implemented upon the second storage object. A determination is made that the replication operation uses an inode no longer used by storage objects of the second node. The inode targeted by the replication operation is freed and utilized based upon the inode being a leaf inode. If the inode is a stream directory inode, then data streams of the stream directory inode are moved under a new private inode and the stream directory inode is released.
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公开(公告)号：US20230259295A1
公开(公告)日：2023-08-17
申请号：US18092533
申请日：2023-01-03
Applicant: NetApp Inc.
Inventor： Akhil Kaushik , Anoop Chakkalakkal Vijayan , Krishna Murthy Chandraiah setty Narasingarayanapeta , Shrey Sengar
IPC: G06F3/06 , G06F16/901 , G06F11/20
CPC classification number: G06F3/065 , G06F3/0604 , G06F3/0659 , G06F3/0683 , G06F11/2064 , G06F16/9024
Abstract: Techniques are provided for handling misaligned holes and writes beyond end of files during a quick reconciliation process. During quick reconciliation, a read operation is performed to read data from a first storage object and is replicated to a second storage object. If the data read from the first storage object comprises misaligned holes, then a different range of data is read from the first storage object so that aligned holes are read and replicated to the second storage object. If the read operation targets a region beyond an end of the first storage object, then the second storage object is truncated to a size of the first storage object.
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公开(公告)号：US20230012754A1
公开(公告)日：2023-01-19
申请号：US17947429
申请日：2022-09-19
Applicant: NetApp Inc.
IPC: G06F3/06
Abstract: Techniques are provided for persistent hole reservation. For example, hole reservation flags of operations targeting a first storage object of a first node are replicated into replication operations targeting a second storage object of a second node during a transition operation to transition the first storage object and the second storage object from an asynchronous replication state to a synchronous replication state. In another example, the second storage object is grown to a size of a replication punch hole operation that failed due to targeting a file block number greater than an end of size of the second storage object.
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公开(公告)号：US20210089557A1
公开(公告)日：2021-03-25
申请号：US16577149
申请日：2019-09-20
Applicant: NetApp Inc.
Abstract: Techniques are provided for dependency aware parallel splitting of operations. For example, a first operation and a second operation may be replicated in parallel from a first device to a second device if the operations only target a single common inode that is an access control list inode referenced by the operations. An operation that dereferences the access control list inode can be replicated in parallel with other operations if the operation does not have the potential to delete the access control list inode from the second device. In another example, operations may be replicated to the second device in parallel if the operations only affect a single common parent directory inode and where timestamps are only moved forward in time at the second device.
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公开(公告)号：US10852985B2
公开(公告)日：2020-12-01
申请号：US16357393
申请日：2019-03-19
Applicant: NetApp Inc.
Abstract: Techniques are provided for persistent hole reservation. For example, hole reservation flags of operations targeting a first storage object of a first node are replicated into replication operations targeting a second storage object of a second node during a transition operation to transition the first storage object and the second storage object from an asynchronous replication state to a synchronous replication state. In another example, the second storage object is grown to a size of a replication punch hole operation that failed due to targeting a file block number greater than an end of size of the second storage object.
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