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公开(公告)号：US11567876B2
公开(公告)日：2023-01-31
申请号：US17084835
申请日：2020-10-30
发明人： Bhaskar Bora , Benjamin Yoder
IPC分类号： G06F12/0871 , G06F12/02 , G06F12/0813 , G06F12/0817
摘要： Cache slots on a storage system may be shared between entities processing write operations for logical storage unit (LSU) tracks and entities performing remote replication for write operations for the LSU tracks. If a new write operation is received on a first storage system (S1) for a track of an LSU (R1) when the cache slot mapped to the R1 track is locked by a process currently transmitting data of the cache slot to a second storage system (S2), a new cache slot may be allocated to the R1 track, the data of the original cache slot copied to the new cache slot, and the new write operation for the R1 track initiated on S1 using the new cache slot; while the data of the original cache slot is independently, and perhaps concurrently, transmitted to S2 to be replicated in R2, the LSU on S2 that is paired with R1.
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公开(公告)号：US20220342551A1
公开(公告)日：2022-10-27
申请号：US17238103
申请日：2021-04-22
摘要： Snapshots may be used to implement remote replication, for example, asynchronously, between a first storage system, A1, and a second storage system, A2. A1 may take a first snapshot, SS21, of a logical storage unit, R1. After the snapshot SS21 it taken, any dependent write operations associated with SS21 may be reconciled, and differences between SS21 and the last snapshot for R1, SS11, may be determined and recorded as a difference set. One or more replication instructions for R1 that include the write operations (or data and metadata corresponding thereto) of the difference set may be sent from A1 to A2. A2 may apply the differences to R2, and then take (activate) a snapshot of R2, SS22, which is a replica of SS21. After A2 activates SS22, A2 may send an acknowledgement to A1 indicating that SS22 has been activated, and A2 may take a next snapshot of R1.
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公开(公告)号：US20220137820A1
公开(公告)日：2022-05-05
申请号：US17085225
申请日：2020-10-30
发明人： David Meiri , Benjamin Yoder
IPC分类号： G06F3/06
摘要： Peer storage systems share the workload of asynchronously replicating a shared logical storage unit (LSU) to a target system. Peer storage systems (S1 and S2) that synchronously replicate a shared LSU share the workload of asynchronously replicating the shared LSU to a target system (S3) by dividing ownership of the replication cycles in an alternating manner without a strict synchronization of cycles between the peer storage systems. Rather, a given cycle number (e.g., Cycle 1) on S1 may not start and end with a same write operation as a same cycle number (Cycle 1) on S2, such that cycles on S1 (e.g., Cycle 1 and Cycle 2) overlap with cycles having the same number (Cycle 1 and Cycle 2) on S2. S1 may asynchronously replicate to S3 only the cycles it owns, and S2 may asynchronously replicate to S3 only the cycles it owns to S3.
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公开(公告)号：US20210373771A1
公开(公告)日：2021-12-02
申请号：US16885587
申请日：2020-05-28
发明人： Benjamin Yoder , William R. Stronge
IPC分类号： G06F3/06
摘要： Data may be replicated from a host storage system to a target storage system. It may be determined to replicate a first logical storage element on the source storage system to a second logical storage element on the target storage system, wherein the first logical storage element defines a first data portion having a first value. It may be determined that a third logical storage element on the target storage system defines a second data portion having the first value. The first logical storage element may be replicated to the second logical storage element by establishing a deduplication relationship between the second logical storage element and the third logical storage element on the target storage system without transmitting the first data portion from the source storage system to the target storage system.
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公开(公告)号：US10997028B2
公开(公告)日：2021-05-04
申请号：US16777687
申请日：2020-01-30
摘要： The system, devices, and methods disclosed herein relate to a dynamic, robust method for choosing a “winner” in an active-active data storage network. In the systems and methods disclosed herein, two or more intelligent nodes within an active-active data storage network periodically exchange operational parameters in an ongoing negotiation regarding who should be the winner in the event of a communication failure within the network. The winner is chosen dynamically based on the operational parameters. A witness is kept apprised of the winner. In the event of a communication failure between the two nodes, the winner is chosen by the witness based on the most recently negotiated lock file reported by one or both of the nodes.
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公开(公告)号：US10210098B1
公开(公告)日：2019-02-19
申请号：US15848682
申请日：2017-12-20
发明人： Benjamin Yoder , Bhaskar Bora
IPC分类号： G06F12/121 , G06F12/0808
摘要： Described are data replication techniques. Y cycles of writes directed to a first storage device of a first data storage system are collected, Y>2. Each of the Y cycles denotes writes directed to the first storage device at an occurrence of a fixed time interval. Writes of cycle N−1 directed to the first storage device are transmitted from the first data storage system to a second data storage system. Writes of cycle N−2 are applied to a second storage device. An acknowledgement regarding cycle N−1 is sent from the second data storage system to the first data storage system responsive to determining that the writes of cycle N−1 directed to the first storage device have been received by the second data storage system and that the writes of cycle N−2 directed to the first storage device have been applied to the second storage device.
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公开(公告)号：US09933947B1
公开(公告)日：2018-04-03
申请号：US14984376
申请日：2015-12-30
IPC分类号： G06F3/06 , G06F12/08 , G06F12/0802
CPC分类号： G06F3/061 , G06F3/0617 , G06F3/0638 , G06F3/065 , G06F3/0671 , G06F3/0683 , G06F11/00 , G06F12/0802 , G06F12/0895 , G06F2212/1016 , G06F2212/285 , G06F2212/60
摘要： Techniques are described for processing multi-page write operations to maintain write level consistency. A multi-page write spanning multiple cache pages is directed to a target device and received on a first data storage system where writes to the target device are synchronously replicated to a second data storage system. On the first data storage system, each of the multiple cache pages may be synchronously replicated to the second data storage system. A lock on each of the cache pages is not released until an acknowledgement is received regarding successful replication of the cache page. On the second data storage system, requests to replicate the multiple cache pages containing write data of the multi-page write are received and processed using locks of corresponding cache pages on the second data storage system. Such techniques also handle concurrent reads and/or writes. Deadlock detection and resolution processing may be performed for concurrent writes.
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公开(公告)号：US11893260B2
公开(公告)日：2024-02-06
申请号：US17238103
申请日：2021-04-22
CPC分类号： G06F3/065 , G06F3/067 , G06F3/0619 , G06F3/0659 , G06F3/0683 , G06F11/1435 , G06F2201/84
摘要： Snapshots may be used to implement remote replication, for example, asynchronously, between a first storage system, A1, and a second storage system, A2. A1 may take a first snapshot, SS21, of a logical storage unit, R1. After the snapshot SS21 it taken, any dependent write operations associated with SS21 may be reconciled, and differences between SS21 and the last snapshot for R1, SS11, may be determined and recorded as a difference set. One or more replication instructions for R1 that include the write operations (or data and metadata corresponding thereto) of the difference set may be sent from A1 to A2. A2 may apply the differences to R2, and then take (activate) a snapshot of R2, SS22, which is a replica of SS21. After A2 activates SS22, A2 may send an acknowledgement to A1 indicating that SS22 has been activated, and A2 may take a next snapshot of R1.
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公开(公告)号：US20230079007A1
公开(公告)日：2023-03-16
申请号：US17984536
申请日：2022-11-10
发明人： Benjamin Yoder , William R. Stronge
IPC分类号： G06F3/06
摘要： Data may be replicated from a host storage system to a target storage system. It may be determined to replicate a first logical storage element on the source storage system to a second logical storage element on the target storage system, wherein the first logical storage element defines a first data portion having a first value. It may be determined that a third logical storage element on the target storage system defines a second data portion having the first value. The first logical storage element may be replicated to the second logical storage element by establishing a deduplication relationship between the second logical storage element and the third logical storage element on the target storage system without transmitting the first data portion from the source storage system to the target storage system.
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公开(公告)号：US11526292B2
公开(公告)日：2022-12-13
申请号：US16885587
申请日：2020-05-28
发明人： Benjamin Yoder , William R. Stronge
IPC分类号： G06F3/06
摘要： Data may be replicated from a host storage system to a target storage system. It may be determined to replicate a first logical storage element on the source storage system to a second logical storage element on the target storage system, wherein the first logical storage element defines a first data portion having a first value. It may be determined that a third logical storage element on the target storage system defines a second data portion having the first value. The first logical storage element may be replicated to the second logical storage element by establishing a deduplication relationship between the second logical storage element and the third logical storage element on the target storage system without transmitting the first data portion from the source storage system to the target storage system.
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