公开(公告)号：US20250053488A1

公开(公告)日：2025-02-13

申请号：US18928972

申请日：2024-10-28

Applicant: NetApp, Inc.

Inventor： Anoop Vijayan ,  Akhil Kaushik ,  Sohan Shetty ,  Dhruvil Shah

IPC: G06F11/20

Abstract: Multi-site distributed storage systems and computer-implemented methods are described for improving a resumption time of input/output (I/O) operations during an automatic unplanned failover (AUFO). A computer-implemented method includes determining, with a second storage cluster, whether heartbeat information from one or more storage objects of a CG of a first set of CGs is received during a time period, determining an out of sync state for a data replication relationship between the CG of the first set of CGs and a mirrored CG of a second set of CGs when the heartbeat information is not received during the time period and sending a single bulk role change call with a cluster identifier from the second cluster to an external mediator to provide a role change from follower to leader in the second set of CGs.

公开(公告)号：US12197291B2

公开(公告)日：2025-01-14

申请号：US18160557

申请日：2023-01-27

Applicant: NetApp, Inc.

Inventor： Sohan Shetty ,  Akhil Kaushik

IPC: G06F11/14 ,  G06F3/06 ,  G06F11/20

Abstract: Multi-site distributed storage systems and computer-implemented methods are described for providing common snapshot retention and automatic fanout reconfiguration for an asynchronous leg after a failure event that causes a failover from a primary storage site to a secondary storage site. A computer-implemented method comprises providing an asynchronous replication relationship with an asynchronous update schedule from one or more storage objects of the first storage node to one or more replicated storage objects of the third storage node, creating a snapshot copy of the one or more storage objects of the first storage node, transferring the snapshot copy to the third storage node based on an asynchronous mirror policy, and intercepting the snapshot create operation on the primary storage site and transferring the snapshot copy to the second storage node to provide a common snapshot between the second storage node and the third storage node.

公开(公告)号：US20240385995A1

公开(公告)日：2024-11-21

申请号：US18787654

申请日：2024-07-29

Applicant: NetApp, Inc.

Inventor： Murali Subramanian ,  Sohan Shetty ,  Rakesh Bhargava ,  Akhil Kaushik

IPC: G06F16/178 ,  G06F3/06 ,  G06F11/20 ,  G06F16/172 ,  G06F16/23

Abstract: Systems and methods for reducing delays between the time at which a need for a resynchronization of data replication between a volume of a local CG and its peer volume of a remote CG is detected and the time at which the resynchronization is triggered (Reseed Time Period) are provided. According to an example, information indicative of the direction of data replication between the volume and the peer volume is maintained within a cache of a node. Responsive to a disruptive operation (e.g., relocation of the volume from a first node to a second node), the Reseed Time Period is lessened by proactively adding a passive cache entry to a cache within the second node at the time the CG relationship is created when the second node represents an HA partner of the first node and prior to the volume coming online when the second node represents a non-HA partner.

公开(公告)号：US20240338145A1

公开(公告)日：2024-10-10

申请号：US18296834

申请日：2023-04-06

Applicant: NetApp, Inc.

Inventor： Sohan Shetty ,  Anoop Vijayan ,  Akhil Kaushik ,  Rohit Chaudhary

IPC: G06F3/06

CPC classification number: G06F3/0655 ,  G06F3/0604 ,  G06F3/067

Abstract: According to an example, a computer-implemented method comprises initiating a first process for atomically setting the primary bias state with a first node of a primary storage cluster of a multi-site distributed storage system due to a temporary loss of connectivity to a mediator or a temporary mediator failure, releasing an atomic lock for the first process on the first node of the primary storage cluster, sending the first process and an associated first generation indicator to a first node of a secondary storage cluster of the multi-site distributed storage system to handle the first process for setting the primary bias state, and initiating a second process for atomically clearing a primary bias state with the first node or any node of the primary storage cluster based on detecting a connection to the mediator or detecting that the mediator is available.

公开(公告)号：US20240329843A1

公开(公告)日：2024-10-03

申请号：US18672604

申请日：2024-05-23

Applicant: NetApp, Inc.

Inventor： Anoop Vijayan ,  Akhil Kaushik ,  Sohan Shetty ,  Dhruvil Shah

IPC: G06F3/06

CPC classification number: G06F3/0611 ,  G06F3/0614 ,  G06F3/0655 ,  G06F3/067

Abstract: Multi-site distributed storage systems and computer-implemented methods are described for improving a resumption time for processing of input/output (I/O) operations during an automatic unplanned failover (AUFO). A first storage cluster includes a first set of consistency groups (CGs) and a second storage cluster includes a second mirrored set of CGs. A computer-implemented method includes prefetching, with a user space of the second storage cluster, configuration information from a replicated database prior to starting the AUFO workflow, sending the configuration information to a kernel space of the second storage cluster on a per CG level while queuing the AUFO workflow, and determining if any in progress workflows conflict with the AUFO workflow.

公开(公告)号：US12050558B2

公开(公告)日：2024-07-30

申请号：US18448325

申请日：2023-08-11

Applicant: NetApp, Inc.

Inventor： Murali Subramanian ,  Sohan Shetty ,  Rakesh Bhargava ,  Akhil Kaushik

IPC: G06F16/17 ,  G06F3/06 ,  G06F11/20 ,  G06F16/172 ,  G06F16/178 ,  G06F16/23

CPC classification number: G06F16/178 ,  G06F3/0614 ,  G06F3/065 ,  G06F16/172 ,  G06F16/2365 ,  G06F11/2069 ,  G06F11/2092

Abstract: Systems and methods for reducing delays between the time at which a need for a resynchronization of data replication between a volume of a local CG and its peer volume of a remote CG is detected and the time at which the resynchronization is triggered (Reseed Time Period) are provided. According to an example, information indicative of the direction of data replication between the volume and the peer volume is maintained within a cache of a node. Responsive to a disruptive operation (e.g., relocation of the volume from a first node to a second node), the Reseed Time Period is lessened by proactively adding a passive cache entry to a cache within the second node at the time the CG relationship is created when the second node represents an HA partner of the first node and prior to the volume coming online when the second node represents a non-HA partner.

公开(公告)号：US20230385244A1

公开(公告)日：2023-11-30

申请号：US18448325

申请日：2023-08-11

Applicant: NetApp, Inc.

Inventor： Murali Subramanian ,  Sohan Shetty ,  Rakesh Bhargava ,  Akhil Kaushik

IPC: G06F16/178 ,  G06F16/23 ,  G06F16/172 ,  G06F3/06

CPC classification number: G06F16/178 ,  G06F16/2365 ,  G06F16/172 ,  G06F3/0614 ,  G06F3/065 ,  G06F11/2069

Abstract: Systems and methods for reducing delays between the time at which a need for a resynchronization of data replication between a volume of a local CG and its peer volume of a remote CG is detected and the time at which the resynchronization is triggered (Reseed Time Period) are provided. According to an example, information indicative of the direction of data replication between the volume and the peer volume is maintained within a cache of a node. Responsive to a disruptive operation (e.g., relocation of the volume from a first node to a second node), the Reseed Time Period is lessened by proactively adding a passive cache entry to a cache within the second node at the time the CG relationship is created when the second node represents an HA partner of the first node and prior to the volume coming online when the second node represents a non-HA partner.

公开(公告)号：US11481139B1

公开(公告)日：2022-10-25

申请号：US17219816

申请日：2021-03-31

Applicant: NetApp, Inc.

Inventor： Anoop Vijayan ,  Akhil Kaushik ,  Sohan Shetty ,  Dhruvil Shah

IPC: G06F3/00 ,  G06F3/06

Abstract: Systems and methods are described for efficiently processing events related to a relationship between a primary copy of data at a primary storage system and a mirror copy of the data at a cross-site secondary storage system of a multi-site distributed storage system. According to an example, a mediator agent that is configured on both primary and secondary storage systems provides coordination and serialization for various events generated in the relationship. The multi-site distributed storage system performs actions based on the event processing such as performing a failover operation from the primary storage system to the secondary storage system or resynchronizing the relationship to ensure application protection and availability.

公开(公告)号：US20220317882A1

公开(公告)日：2022-10-06

申请号：US17219816

申请日：2021-03-31

Applicant: NetApp, Inc.

Inventor： Anoop Vijayan ,  Akhil Kaushik ,  Sohan Shetty ,  Dhruvil Shah

IPC: G06F3/06

Abstract: Systems and methods are described for efficiently processing events related to a relationship between a primary copy of data at a primary storage system and a mirror copy of the data at a cross-site secondary storage system of a multi-site distributed storage system. According to an example, a mediator agent that is configured on both primary and secondary storage systems provides coordination and serialization for various events generated in the relationship. The multi-site distributed storage system performs actions based on the event processing such as performing a failover operation from the primary storage system to the secondary storage system or resynchronizing the relationship to ensure application protection and availability.