公开(公告)号：US20240273186A1

公开(公告)日：2024-08-15

申请号：US18168741

申请日：2023-02-14

Applicant: NetApp, Inc.

Inventor： Tijin George ,  Vijay Srinath ,  Ling Zheng

IPC: G06F21/55 ,  G06F16/11 ,  G06F16/178 ,  G06F21/62

CPC classification number: G06F21/552 ,  G06F16/125 ,  G06F16/128 ,  G06F16/178 ,  G06F21/6218 ,  G06F2221/034

Abstract: Systems and methods for creation and retention of immutable snapshots to facilitate ransomware protection are provided. According to one embodiment, multiple use cases for retention of snapshots are supported, including (i) maintaining a locked snapshot on a source volume of a first storage system on which it was originally created for at least an associated immutable retention time; (ii) replicating the locked snapshot to a destination volume of a second storage system and also maintaining the replica of the locked snapshot on the destination volume for at least the associated immutable retention time; and (iii) maintaining an unlocked snapshot on the source volume, replicating the unlocked snapshot to the destination volume, locking the replicated snapshot on the destination volume when it has an associated non-zero immutable retention time, and thereafter maintaining the replica on the destination volume in accordance with the immutable retention time.

公开(公告)号：US12061520B2

公开(公告)日：2024-08-13

申请号：US17932916

申请日：2022-09-16

Applicant: NetApp, Inc.

Inventor： Morgan Mears ,  Samuel Quincy Fink

IPC: G06F11/10

CPC classification number: G06F11/1096

Abstract: One or more systems, devices, computer program products, and/or computer-implemented methods provided herein to use a redundant array of disks. A system can comprise a memory that stores computer executable components, and a processor that executes the computer executable components stored in the memory, wherein the computer executable components can comprise a control component that directs, for n physical drives of a redundant array of disks (RAID) storing data for at least n logical volumes, log-structured writing of data of each logical volume of the at least n logical volumes vertically across chunks of only a single physical drive of the n physical drives, wherein the control component further directs writing of parity data at each of the physical drives, which parity data at each physical drive of the subset respectively corresponds to other ones of the physical drives of the n physical drives.

公开(公告)号：US12056056B2

公开(公告)日：2024-08-06

申请号：US18222099

申请日：2023-07-14

Applicant: NETAPP, INC.

Inventor： Sumith Makam ,  Rahul Thapliyal ,  Kartik R ,  Roopesh Chuggani ,  Abhisar Lnu ,  Maria Josephine Priyanka S

IPC: G06F12/0891

CPC classification number: G06F12/0891 ,  G06F2212/1024

Abstract: Methods and systems for a networked storage system are provided. One method includes: generating, by a first node, a dummy entry in a storage location cache of the first node, the dummy entry associated with a read request received by the first node for data stored using a logical object owned by a second node; receiving, by the first node, an invalidation request to invalidate any storage location entry associated with the data, the invalidation request sent in response to the second node receiving a write request to modify the data; invalidating, by the first node, the dummy entry; receiving, by the first node, a response to the read request from the second node with the requested data; and replacing, by the first node, the dummy entry with a storage location entry and invalidating the storage location entry based on the invalidated dummy entry.

公开(公告)号：US12050938B2

公开(公告)日：2024-07-30

申请号：US17107361

申请日：2020-11-30

Applicant: NetApp, Inc.

Inventor： Abhishek Hiregoudar ,  Siu Wu ,  Alma Dimnaku

IPC: G06F9/50 ,  G06F3/06

CPC classification number: G06F9/5083 ,  G06F3/061 ,  G06F3/0631 ,  G06F3/0646 ,  G06F3/0683 ,  G06F9/5011 ,  G06F9/5077 ,  G06F2209/5022 ,  G06F2209/505

Abstract: Systems, methods, and machine-readable media for monitoring a storage system and correcting demand imbalances among nodes in a cluster are disclosed. A performance manager for the storage system may detect performance imbalances that occur over a period of time. When operating below an optimal performance capacity, the manager may cause a volume to be moved from a node with a high load to a node with a lower load to achieve a preventive result. When operating at or near optimal performance capacity, the manager may cause a QOS limit to be imposed to prevent the workload from exceeding the performance capacity, to achieve a proactive result. When operating abnormally, the manager may cause a QOS limit to be imposed to throttle the workload to bring the node back within the optimal performance capacity of the node, to achieve a reactive result. These actions may be performed independently, or in cooperation.

公开(公告)号：US12050540B2

公开(公告)日：2024-07-30

申请号：US18140808

申请日：2023-04-28

Applicant: NetApp, Inc.

Inventor： Abhijeet Gole ,  Ratnesh Gupta ,  Douglas Doucette

IPC: G06F12/10 ,  G06F12/1009

CPC classification number: G06F12/1009 ,  G06F2212/1021 ,  G06F2212/154 ,  G06F2212/214

Abstract: Methods, non-transitory machine-readable media, and computing devices that manage resources between multiple hosts coupled to dual-port solid-state disks (SSDs) are disclosed. With this technology, in-core conventional namespace (CNS) and zoned namespace (ZNS) mapping tables are synchronized by a host flash translation layer with on-disk CNS and ZNS mapping tables, respectively. An entry in one of the in-core CNS or ZNS mapping tables is identified based on whether a received storage operation is directed to a CNS or a ZNS of the dual-port SSD. The entry is further identified based on a logical address extracted from the storage operation. The storage operation is serviced using a translation in the identified entry for the logical address, when the storage operation is directed to the CNS, or a zone identifier in the identified entry for a zone of the ZNS, when the storage operation is directed to the ZNS.

公开(公告)号：US12045489B2

公开(公告)日：2024-07-23

申请号：US18060367

申请日：2022-11-30

Applicant: NetApp, Inc.

Inventor： Sangramsinh Pandurang Pawar ,  Bhoovaraghan Subramanian ,  William Derby Dallas ,  Sowkoor Sunad Bhandary ,  Rajesh Rajarman ,  FNU Sahasranshu

IPC: G06F3/06

CPC classification number: G06F3/0646 ,  G06F3/0604 ,  G06F3/067

Abstract: Systems and methods for performing a fast resynchronization of a mirrored aggregate of a distributed storage system using disk-level cloning are provided. According to one embodiment, responsive to a failure of a disk of a plex of the mirrored aggregate utilized by a high-availability (HA) pair of nodes of a distributed storage system, disk-level clones of the disks of the healthy plex may be created external to the distributed storage system and attached to the degraded HA partner node. After detection of the cloned disks by the degraded HA partner node, mirror protection may be efficiently re-established by assimilating the cloned disks within the failed plex and then resynchronizing the mirrored aggregate by performing a level-1 resync of the failed plex with the healthy plex based on a base file system snapshot of the healthy plex. In this manner, a more time-consuming level-0 resync may be avoided.

公开(公告)号：US12038817B2

公开(公告)日：2024-07-16

申请号：US17562401

申请日：2021-12-27

Applicant: NetApp, Inc.

Inventor： Brian Naylor

IPC: G06F11/20 ,  G06F12/0815

CPC classification number: G06F11/2094 ,  G06F12/0815 ,  G06F2201/805 ,  G06F2201/82 ,  G06F2201/84 ,  G06F2212/1032 ,  G06F2212/608

Abstract: Methods, non-transitory machine readable media, and computing devices that facilitate cache rewarming in a failover domain are disclosed. With this technology, a tag is inserted into a local tagstore. The tag includes a location of data in a cache hosted by a failover computing device and is retrieved from a snapshot of a remote tagstore for the cache. An invalidation log for an aggregate received from the failover computing device is replayed subsequent to mounting a filesystem that is associated with the aggregate and comprises the data. The data is retrieved from the cache following determination of the location from the tag in the local tagstore in order to service a received storage operation associated with the data. Takeover nodes do not have to wait for a cache to repopulate organically, and can leverage the contents of a cache of a failover node to thereby improve performance following takeover events.

公开(公告)号：US20240232080A1

公开(公告)日：2024-07-11

申请号：US18615014

申请日：2024-03-25

Applicant: NetApp, Inc.

Inventor： Sudheer Kumar Vavilapalli ,  Asif Imtiyaz Pathan ,  Parag Sarfare ,  Nikhil Mattankot ,  Stephen Wu ,  Amit Borase

IPC: G06F12/0802 ,  G06F3/06

CPC classification number: G06F12/0802 ,  G06F3/0619 ,  G06F3/0653 ,  G06F3/0673 ,  G06F2212/60

Abstract: Techniques are provided for implementing a persistent key-value store for caching client data, journaling, and/or crash recovery. The persistent key-value store may be hosted as a primary cache that provides read and write access to key-value record pairs stored within the persistent key-value store. The key-value record pairs are stored within multiple chains in the persistent key-value store. Journaling is provided for the persistent key-value store such that incoming key-value record pairs are stored within active chains, and data within frozen chains is written in a distributed manner across distributed storage of a distributed cluster of nodes. If there is a failure within the distributed cluster of nodes, then the persistent key-value store may be reconstructed and used for crash recovery.

公开(公告)号：US20240220136A1

公开(公告)日：2024-07-04

申请号：US18146526

申请日：2022-12-27

Applicant: NetApp, Inc.

Inventor： Mrinal K. Bhattacharjee ,  Sreenath Korrakuti ,  Sateesh Kumar Pola

IPC: G06F3/06

CPC classification number: G06F3/0626 ,  G06F3/0617 ,  G06F3/0644 ,  G06F3/0647 ,  G06F3/0689

Abstract: Systems and methods for reducing the provisioned storage capacity of a disk or aggregate of disks of a storage appliance while the storage appliance continues to serve clients are provided. According to one embodiment, the size of the aggregate may be reduced by shrinking the file system of the storage appliance and removing a selected disk from the aggregate. When an identified shrink region includes the entire addressable PVBN space of the selected disk, the file system may be shrunk by relocating valid data from the selected disk elsewhere within the aggregate. After the valid data is relocated, the selected disk may be removed from the aggregate, thereby reducing the provisioned storage capacity of the aggregate by the size of the selected disk.

公开(公告)号：US20240220106A1

公开(公告)日：2024-07-04

申请号：US18607651

申请日：2024-03-18

Applicant: NetApp, Inc.

Inventor： Manan Dahyabhai Patel ,  Wei Sun

IPC: G06F3/06

CPC classification number: G06F3/0608 ,  G06F3/0652 ,  G06F3/067

Abstract: Techniques are provided for implementing garbage collection and bin synchronization for a distributed storage architecture of worker nodes managing distributed storage composed of bins of blocks. As the distributed storage architecture scales out to accommodate more storage and worker nodes, garbage collection used to free unused blocks becomes unmanageable and slow. Accordingly garbage collection is improved by utilizing heuristics to dynamically speed up or down garbage collection and set sizes for subsets of a bin to process instead of the entire bin. This ensures that garbage collection does not use stale information about what blocks are in-use, and ensures garbage collection does not unduly impact client I/O processing or conversely falls behind on garbage collection. Garbage collection can be incorporated into a bin sync process to improve the efficiency of the bin sync process so that unused blocks are not needlessly copied by the bin sync process.