公开(公告)号：US20240036997A1

公开(公告)日：2024-02-01

申请号：US17875814

申请日：2022-07-28

Applicant: NetApp, Inc.

Inventor： Anoop Vijayan ,  Akhil Kaushik ,  Dhruvil Shah

IPC: G06F11/20 ,  G06F11/07

CPC classification number: G06F11/2025 ,  G06F11/0727 ,  G06F11/0772 ,  G06F11/0757

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 monitoring, with a second cluster, heartbeat information received at ultra-short time intervals from a first connection of one or more storage objects of the first cluster, determining, with the second cluster, whether the heartbeat information from the first connection is received during an ultra-short time interval, and intelligently routing heartbeat information from the one or more storage objects of the first cluster from the first connection to a second connection when the heartbeat information from the first connection is not received during the ultra-short time interval.

公开(公告)号：US20230367494A1

公开(公告)日：2023-11-16

申请号：US18360133

申请日：2023-07-27

Applicant: NetApp, Inc.

Inventor： Arul Valan ,  Anoop Vijayan ,  Akhil Kaushik

IPC: G06F3/06

CPC classification number: G06F3/0631 ,  G06F3/0604 ,  G06F3/067

Abstract: Systems and methods for making a cross-site storage solution resilient towards mediator unavailability are provided. According to one embodiment, a stretched storage system is operable to bring a mediator associated with a primary and secondary distributed storage system back into the role of an arbitrator for peered consistency groups (CGs). A mediator reseed status indicator is maintained for multiple CGs to identify when the mediator’s status information for a CG is stale. When the mediator becomes available and a local CG is identified as the subject of a mediator reseed process, the master node of the primary that hosts a master copy of a dataset for the local CG performs the reseed process, including: (i) causing relationship status information for the local CG to be updated on the mediator to the current state maintained by the primary; and (ii) resetting the mediator reseed status indicator.

公开(公告)号：US11740811B2

公开(公告)日：2023-08-29

申请号：US17219740

申请日：2021-03-31

Applicant: NetApp, Inc.

Inventor： Arul Valan ,  Anoop Vijayan ,  Akhil Kaushik

IPC: G06F3/00 ,  G06F3/06

CPC classification number: G06F3/0631 ,  G06F3/0604 ,  G06F3/067

Abstract: Systems and methods for making a cross-site storage solution resilient towards mediator unavailability are provided. According to one embodiment, a stretched storage system is operable to bring a mediator associated with a primary and secondary distributed storage system back into the role of an arbitrator for peered consistency groups (CGs). A mediator reseed status indicator is maintained for multiple CGs to identify when the mediator's status information for a CG is stale. When the mediator becomes available and a local CG is identified as the subject of a mediator reseed process, the master node of the primary that hosts a master copy of a dataset for the local CG performs the reseed process, including: (i) causing relationship status information for the local CG to be updated on the mediator to the current state maintained by the primary; and (ii) resetting the mediator reseed status indicator.

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.

公开(公告)号：US11409622B1

公开(公告)日：2022-08-09

申请号：US17238829

申请日：2021-04-23

Applicant: NetApp, Inc.

Inventor： Akhil Kaushik ,  Anoop Vijayan

IPC: G06F11/20 ,  G06F11/30 ,  G06F11/14

Abstract: Systems and methods are described for a non-disruptive planned failover from a primary copy of data at a primary storage cluster to a mirror copy of the data at a cross-site secondary storage cluster without using an external mediator. According to an example, a planned failover feature of a multi-site distributed storage system provides an order of operations such that a primary copy of a first data center continues to serve I/O operations until a mirror copy of a second data center is ready. This planned failover feature improves functionality and efficiency of the distributed storage system by providing non-disruptiveness during planned failover without using an external mediator based on a primary storage cluster being selected as an authority to implement a state machine with a persistent configuration database to track a planned failover state for the planned failover.