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公开(公告)号：US12189573B2
公开(公告)日：2025-01-07
申请号：US17376822
申请日：2021-07-15
Applicant: Nutanix, Inc.
Inventor： Abhishek Gupta , Freddy James , Pranab Patnaik , Ranjan Mn
Abstract: A technique creates a compact state of snapshot metadata and associated selected snapshots that are frequently used and maintained in memory of a node of a cluster to facilitate processing of workflow operations associated with a logical entity in a disaster recovery (DR) environment. The compact state represents a minimal subset of snapshot metadata that is frequently used to perform operations in accordance with the DR workflow operations. In addition, metadata associated with the progress of the DR workflow operations processed by the node is periodically consolidated within the compact state. Illustratively, the selected frequently used snapshots of the logical entity include (i) a recently created snapshot; (ii) one or more reference snapshots; (iii) a snapshot scheduled for replication; and (iv) any snapshot that is queued for a current or future-scheduled operation. The technique is also directed to a snapshot and metadata eviction policy that is configured to evict infrequently used snapshots and snapshot metadata to improve memory space consumption of the memory.
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12.发明公开公开(公告)号：US20240311254A1
公开(公告)日：2024-09-19
申请号：US18239960
申请日：2023-08-30
Applicant: Nutanix, Inc.
Inventor： Abhishek Gupta , Andrey Alexseyevich Pyatkov , Angshuman Bezbaruah , Artem Yevgenyevich Livshits , Brajesh Kumar Shrivastava , Akshay Pandita , Manan Shah
IPC: G06F11/14
CPC classification number: G06F11/1446
Abstract: A differencing technique enables efficient retrieval of data from one of a substantial number of point-in-time images (e.g., snapshots) maintained over substantially long periods of time in a long-term storage service (LTSS) of an archival storage system. The LTSS efficiently retrieves the data by computing differences or deltas between any two arbitrary snapshots in accordance with a differencing procedure. According to the technique, the differencing procedure operates on one or more index tree structures configured to translate a logical offset range of snapshot data in a snapshot address space (e.g., of a file system) to a data object address space (e.g., of an object store hosting the snapshot data).
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公开(公告)号：US20240297786A1
公开(公告)日：2024-09-05
申请号：US18237315
申请日：2023-08-23
Applicant: Nutanix, Inc.
Inventor： Angshuman Bezbaruah , Brajesh Kumar Shrivastava , Nikhil Loya , Abhishek Gupta , Pradeep Kashyap Ramaswamy
CPC classification number: H04L9/088 , G06F16/128
Abstract: A bypassing technique bypasses an indexing service and provides a bypass data path for transferring/retrieving snapshots from a production cluster to an object store. In an embodiment, the production cluster may determine how extents of the snapshots are packed into objects of the object store and transfers the snapshots directly to the object store over the bypass data path. Once the snapshot transfer is completed, the production cluster provides location metadata as to how the snapshot extents are packed into objects to the indexing service. The indexing service is invoked to create an index of the location metadata and is not involved in the data transfer of the snapshots. In another embodiment, the production cluster identifies a snapshot to restore and queries the indexing service to compute the deltas between the snapshot to be restored and a reference snapshot. The indexing service returns a set of segments that indicates the changed delta regions between the two snapshots. The production cluster then issues a direct read to the object store over the bypass data path to read the changed delta segments.
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Patent Agency Ranking
公开(公告)号：US20240272991A1
公开(公告)日：2024-08-15
申请号：US18227217
申请日：2023-07-27
Applicant: Nutanix, Inc.
Inventor： Abhishek Gupta , Ajaykumar Rajubhai Bhammar , Akshay Pandita , Bhoomi Sawant , Brajesh Kumar Shrivastava , Deepak Narayan , Prachi Gupta , Siddhant Meshram
CPC classification number: G06F11/1469 , G06F16/27 , G06F2201/84
Abstract: A technique enables recovery of failover data used to generate one or more High Frequency Snapshots (HFSs) at a source and replicated to a target for storage and recovery. The target is illustratively an intermediary repository embodied as a long-term storage service (LTSS) configured to organize and store the HFSs as recovery points (RPs) in an object store. The LTSS stores a HFS identifier (ID), a logical offset in an object of the object store storing data of the HFS, and a logical timestamp associated with each replicated HFS as a key of a segment descriptor in a key-value database configured to store metadata describing the failover data of the HFS stored as one or more objects in the object store. Upon recovery of the failover data, the technique enables identification of the HFS stored in the object store and creation of a HFS index metadata structure (B+ tree) to extract the identified HFS as a RP.
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15.发明公开公开(公告)号：US20230205653A1
公开(公告)日：2023-06-29
申请号：US17675263
申请日：2022-02-18
Applicant: Nutanix, Inc.
Inventor： Abhishek Gupta , Bhushan Pandit , Pranab Patnaik
CPC classification number: G06F11/2035 , G06F11/1435 , G06F11/1469 , G06F11/1464 , G06F2201/84
Abstract: A framework is described that improves resource utilization during operations executing within workflows of the distributed data processing system (e.g., having a plurality of interconnected nodes) in a disaster recovery (DR) environment configured to support synchronous and asynchronous (i.e., heterogeneous) DR workflows (e.g., generating snapshots and replicating data) that include synchronous replication, asynchronous replication, nearsync (i.e., short duration snapshots of metadata) replication and migration of data objects associated with the workflows for failover (e.g., replication and/or migration) to a secondary site in the event of failure of the primary site. The framework meters (regulates) execution of the operations directed to the workloads so as to efficiently use the resources in a manner that allows timely progress (completion) of certain (e.g., high-frequency) operations and reduction in blocking (stalling) of other (e.g., low-frequency) operations by avoiding unnecessary resource hoarding/consumption and contention. Notably, the framework also provides metering and tuning of properties during execution of the workflows and maintains their state to provide for recovery.
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公开(公告)号：US11416351B2
公开(公告)日：2022-08-16
申请号：US17135166
申请日：2020-12-28
Applicant: Nutanix, Inc.
Inventor： Brajesh Kumar Shrivastava , Abhishek Gupta , Pranab Patnaik , Kai Tan
Abstract: A system and method determining a Chain Identification Number (CID) of a source snapshot to be replicated from a source site to a target site of a virtual computing system, determining a predetermined number of potential reference snapshots based on the CID of the source snapshot, computing a closeness value between the source snapshot and each of the potential reference snapshots, and creating a list of the potential reference snapshots based on the closeness value of each of the potential reference snapshots. One snapshot from the list is selected as a reference snapshot. The source snapshot is replicated to the target site based on the reference snapshot.
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公开(公告)号：US20220027241A1
公开(公告)日：2022-01-27
申请号：US17135166
申请日：2020-12-28
Applicant: Nutanix, Inc.
Inventor： Brajesh Kumar Shrivastava , Abhishek Gupta , Pranab Patnaik , Kai Tan
Abstract: A system and method determining a Chain Identification Number (CID) of a source snapshot to be replicated from a source site to a target site of a virtual computing system, determining a predetermined number of potential reference snapshots based on the CID of the source snapshot, computing a closeness value between the source snapshot and each of the potential reference snapshots, and creating a list of the potential reference snapshots based on the closeness value of each of the potential reference snapshots. One snapshot from the list is selected as a reference snapshot. The source snapshot is replicated to the target site based on the reference snapshot.
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公开(公告)号：US20230029677A1
公开(公告)日：2023-02-02
申请号：US17487935
申请日：2021-09-28
Applicant: Nutanix, Inc.
Inventor： Abhishek Gupta , Andrey Alexseyevich Pyatkov , Angshuman Bezbaruah , Artem Yevgenyevich Livshits , Brajesh Kumar Shrivastava , Karan Gupta , Prakash Narayanasamy
Abstract: An indexing technique provides an index data structure for efficient retrieval of a snapshot from a long-term storage service (LTSS) of an archival storage system. The snapshot is generated from typed data of a logical entity, such as a virtual disk (vdisk). The data of the snapshot is replicated to a frontend data service of the LTSS sequentially and organized as one or more data objects for storage by a backend data service of LTSS in an object store of the archival storage system. Metadata associated with the snapshot (i.e., snapshot metadata) is recorded as a log and persistently stored on storage media local to the frontend data service. The snapshot metadata includes information describing the snapshot data, e.g., a logical offset range of a snapshot of the vdisk and, thus, is used to construct the index data structure. Notably, construction of the index data structure is deferred until after the entirety of the snapshot data has been replicated and received by the frontend data service.
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