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1. 发明公开

US20240275814A1 CREATION AND RETENTION OF IMMUTABLE SNAPSHOTS TO FACILITATE RANSOMWARE PROTECTION 审中-公开
公开(公告)号：US20240275814A1
公开(公告)日：2024-08-15
申请号：US18168739
申请日：2023-02-14
申请人： NetApp, Inc.
发明人： Tijin George , Vijay Srinath , Ling Zheng
IPC分类号： H04L9/40 , G06F16/11
CPC分类号： H04L63/1466 , G06F16/125 , G06F16/128 , H04L63/1416 , H04L63/1425
摘要： 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.

2. 发明授权

US11966361B2 Reducing stable data eviction with synthetic baseline snapshot and eviction state refresh 有权
公开(公告)号：US11966361B2
公开(公告)日：2024-04-23
申请号：US17536515
申请日：2021-11-29
申请人： NetApp Inc.
发明人： Ajay Pratap Singh Kushwah , Ling Zheng , Sharad Jain
IPC分类号： G06F16/11 , G06F11/14 , G06F12/121 , G06F16/13 , H04L67/568
CPC分类号： G06F16/128 , G06F11/1448 , G06F11/1464 , G06F12/121 , G06F16/13 , H04L67/568
摘要： With a forever incremental snapshot configuration and a typical caching policy (e.g., least recently used), a storage appliance may evict stable data blocks of an older snapshot, perhaps unchanged data blocks of the snapshot baseline. If stable data blocks have been evicted, restore of a recent snapshot will suffer the time penalty of downloading the stable blocks for restoring the recent snapshot. Creating synthetic baseline snapshots and refreshing eviction data of stable data blocks can avoid eviction of stable data blocks and reduce the risk of violating a recovery time objective.

3. 发明公开

US20240118977A1 INCREMENTAL BACKUP TO OBJECT STORE 审中-公开
公开(公告)号：US20240118977A1
公开(公告)日：2024-04-11
申请号：US18541143
申请日：2023-12-15
申请人： NetApp, Inc.
发明人： Ling Zheng , Atul Ramesh Pandit , Tijin George , Ravindra Ramachandraiah Kuramkote
IPC分类号： G06F11/14
CPC分类号： G06F11/1451 , G06F11/1458
摘要： Techniques are provided for incremental backup to an object store. A request may be received from an application to perform a backup from a volume hosted by a node to a backup target within the object store. A set of changed files within the volume since a prior backup of the volume was performed to the backup target is identified, along with metadata associated with the set of changed files. The metadata is utilized to identify changed data blocks comprising data of the set of changed files that was modified since the prior backup. The changed data blocks are backed up to the object store.

4. 发明授权

US10394660B2 Snapshot restore workflow 有权
公开(公告)号：US10394660B2
公开(公告)日：2019-08-27
申请号：US14815064
申请日：2015-07-31
申请人： NetApp, Inc.
发明人： David Brittain Bolen , Suhas Prakash , Anshul Pundir , Ling Zheng
IPC分类号： G06F3/06 , G06F11/14
摘要： A snap restore technique efficiently restores snapshots of storage containers served by a storage input/output (I/O) stack executing on one or more nodes of a cluster. A Small Computer Systems Interface administration layer interacts with a volume layer of the storage I/O stack to manage and implement a snap restore procedure to restore one or more snapshots of a storage container. The storage container may be a logical unit (LUN) embodied as parent volume (active volume) and the snapshot may be represented as an independent volume embodied as read-only copy of the active volume. The snap restore procedure may be configured to allow restoration to a single snapshot of a LUN or restoration of a plurality of LUNs organized as a consistency group from a group of snapshots. Restoration of the LUN from a snapshot involves (i) creation of another independent volume embodied as a read-write copy (clone) of the snapshot, (ii) replacement of the (old) active volume with the clone, (iii) deletion of the old active volume, and (iv) mapping of the LUN to the clone (i.e., a new active volume).

5. 发明授权

US10282099B1 Intelligent snapshot tiering 有权
公开(公告)号：US10282099B1
公开(公告)日：2019-05-07
申请号：US15796467
申请日：2017-10-27
申请人： NetApp, Inc.
发明人： Ajay Pratap Singh Kushwah , Ling Zheng , Sharad Jain
IPC分类号： G06F11/14 , G06F3/06
摘要： Intelligent snapshot tiering facilitates efficient management of snapshots and efficient restore of snapshots. For intelligent snapshot tiering, a storage appliance can limit cross-tier migration to invalidated data blocks of a snapshot instead of an entire snapshot. Based on a policy, a storage appliance can identify a snapshot to be migrated to another storage tier and then determine which data blocks are invalidated by an immediately succeeding snapshot. This would limit network bandwidth consumption to the invalidated data blocks and maintain the valid data blocks at the faster access storage tier since the more recent snapshots are more likely to be restored.

6. 发明申请

US20180276090A1 CROSS-PLATFORM REPLICATION 审中-公开
公开(公告)号：US20180276090A1
公开(公告)日：2018-09-27
申请号：US15995607
申请日：2018-06-01
申请人： NetApp Inc.
发明人： Atul Ramesh Pandit , Vijay M. Deskmukh , Michael Lee Federwisch , Ling Zheng , Kiyoshi James Komatsu , Rachita Kothiyal
IPC分类号： G06F11/20 , H04L29/08
CPC分类号： G06F11/2069 , G06F11/2071 , G06F11/2092 , G06F2201/805 , H04L67/1095 , H04L67/1097
摘要： One or more techniques and/or computing devices are provided for cross-platform replication. For example, a replication relationship may be established between a first storage endpoint and a second storage endpoint, where at least one of the storage endpoints, such as the first storage endpoint, lacks or has incompatible functionality to perform and manage replication because the storage endpoints have different storage platforms that store data differently, use different control operations and interfaces, etc. Accordingly, replication destination workflow, replication source workflow, and/or a proxy representing the first storage endpoint may be implemented at the second storage endpoint comprising the replication functionality. In this way, replication, such as snapshot replication, may be implemented between the storage endpoints by the second storage endpoint using the replication destination workflow, the replication source workflow, and/or the proxy that either locally executes tasks or routes tasks to the first storage endpoint such as for data access.

7. 发明申请

US20180095685A1 N-WAY MERGE TECHNIQUE FOR UPDATING VOLUME METADATA IN A STORAGE I/O STACK 审中-公开
公开(公告)号：US20180095685A1
公开(公告)日：2018-04-05
申请号：US15820004
申请日：2017-11-21
申请人： NetApp, Inc.
发明人： Janice D'Sa , Ling Zheng , Blake H. Lewis
IPC分类号： G06F3/06 , H04L29/08
CPC分类号： G06F3/0619 , G06F3/0607 , G06F3/0626 , G06F3/0644 , G06F3/0665 , G06F3/067 , G06F3/0689 , H04L67/1097
摘要： A N-way merge technique efficiently updates metadata in accordance with a N-way merge operation managed by a volume layer of a storage input/output (I/O) stack executing on one or more nodes of a cluster. The metadata is embodied as mappings from logical block addresses (LBAs) of a logical unit (LUN) accessible by a host to durable extent keys, and is organized as a multi-level dense tree. The mappings are organized such that a higher level of the dense tree contains more recent mappings than a next lower level, i.e., the level immediately below. The N-way merge operation is an efficient (i.e., optimized) way of updating the volume metadata mappings of the dense tree by merging the mapping content of all three levels in a single iteration, as opposed to merging the content of the first level with the content of the second level in a first iteration of a two-way merge operation and then merging the results of the first iteration with the content of the third level in a second iteration of the operation.

8. 发明申请

US20170300388A1 NVRAM LOSS HANDLING 审中-公开
公开(公告)号：US20170300388A1
公开(公告)日：2017-10-19
申请号：US15130280
申请日：2016-04-15
申请人： NetApp, Inc.
发明人： Ling Zheng , Jeffrey S. Kimmel
IPC分类号： G06F11/14 , G06F3/06
CPC分类号： G06F11/1464
摘要： A technique restores a file system of a storage input/output (I/O) stack to a deterministic point-in-time state in the event of failure (loss) of non-volatile random access memory (NVRAM) of a node. The technique enables restoration of the file system to a safepoint stored on storage devices, such solid state drives (SSD), of the node with minimum data and metadata loss. The safepoint is a point-in-time during execution of I/O requests (e.g., write operations) at which data and related metadata of the write operations prior to the point-in-time are safely persisted on SSD such that the metadata relating to an image of the file system on SSD (on-disk) is consistent and complete. Upon reboot after NVRAM loss, the technique identifies (i) the most recent safepoint, as well as (ii) the inflight writes that were persistently stored on disk after the most recent safepoint. The data and metadata of those inflight writes are then deleted to place the on-disk file system to its state at the most recent safepoint.

9. 发明授权

US09569140B2 Scheduling deduplication in a storage system 有权
标题翻译：在存储系统中安排重复数据消除
公开(公告)号：US09569140B2
公开(公告)日：2017-02-14
申请号：US14880183
申请日：2015-10-09
申请人： NetApp, Inc.
发明人： Blake Lewis , Ling Zheng , Craig Johnston , Vinod Daga
IPC分类号： G06F17/00 , G06F3/06 , G06F17/30
CPC分类号： G06F17/30156 , G06F3/0608 , G06F3/0641 , G06F3/0659 , G06F3/067
摘要： A system can maintain multiple queues for deduplication requests of different priorities. The system can also designate priority of storage units. The scheduling priority of a deduplication request is based on the priority of the storage unit indicated in the deduplication request and a trigger for the deduplication request.
摘要翻译：系统可以为不同优先级的重复数据删除请求维护多个队列。系统还可以指定存储单元的优先级。重复数据消除请求的调度优先级是基于重复数据消除请求中指示的存储单元的优先级和重复数据删除请求的触发。

10. 发明申请

US20170031774A1 SNAPSHOT RESTORE WORKFLOW 审中-公开
标题翻译： SNAPSHOT恢复工作流程
公开(公告)号：US20170031774A1
公开(公告)日：2017-02-02
申请号：US14815064
申请日：2015-07-31
申请人： NetApp, Inc.
发明人： David Brittain Bolen , Suhas Prakash , Anshul Pundir , Ling Zheng
IPC分类号： G06F11/14 , G06F3/06
CPC分类号： G06F11/1458 , G06F3/0619 , G06F3/065 , G06F3/067 , G06F11/00 , G06F2201/84
摘要： A snap restore technique efficiently restores snapshots of storage containers served by a storage input/output (I/O) stack executing on one or more nodes of a cluster. A Small Computer Systems Interface administration layer interacts with a volume layer of the storage I/O stack to manage and implement a snap restore procedure to restore one or more snapshots of a storage container. The storage container may be a logical unit (LUN) embodied as parent volume (active volume) and the snapshot may be represented as an independent volume embodied as read-only copy of the active volume. The snap restore procedure may be configured to allow restoration to a single snapshot of a LUN or restoration of a plurality of LUNs organized as a consistency group from a group of snapshots. Restoration of the LUN from a snapshot involves (i) creation of another independent volume embodied as a read-write copy (clone) of the snapshot, (ii) replacement of the (old) active volume with the clone, (iii) deletion of the old active volume, and (iv) mapping of the LUN to the clone (i.e., a new active volume).
摘要翻译：快速恢复技术有效地恢复由集群的一个或多个节点上执行的存储输入/输出（I / O）堆栈服务的存储容器的快照。小型计算机系统接口管理层与存储I / O堆栈的卷层交互以管理和实现快照恢复过程以恢复存储容器的一个或多个快照。存储容器可以是体现为父卷（活动卷）的逻辑单元（LUN），并且快照可以被表示为体现为活动卷的只读副本的独立卷。快照恢复过程可以被配置为允许恢复LUN的单个快照或从一组快照组织为一致性组的多个LUN的恢复。从快照恢复LUN涉及（i）创建体现为快照的读写副本（克隆）的另一独立卷，（ii）使用克隆替换（旧）活动卷，（iii）删除旧的活动卷，以及（iv）将LUN映射到克隆（即，新的活动卷）。

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