公开(公告)号：US09811428B2

公开(公告)日：2017-11-07

申请号：US14559343

申请日：2014-12-03

Applicant: NetApp, Inc.

Inventor： Vaiapuri Ramasubramaniam ,  Harihara Kadayam ,  Parag Sarfare ,  Yong Eun Cho ,  Chaitanya Patel ,  Hrishikesh Keremane ,  Prachi Deshmukh

IPC: G06F11/00 ,  G06F11/20

CPC classification number: G06F11/2033 ,  G06F11/2028 ,  G06F11/2041 ,  G06F11/2046 ,  G06F2201/805

Abstract: A system and method for handling multi-node failures in a disaster recovery cluster is provided. In the event of an error condition, a switchover operation occurs from the failed nodes to one or more surviving nodes. Data stored in non-volatile random access memory is recovered by the surviving nodes to bring storage objects, e.g., disks, aggregates and/or volumes into a consistent state.

公开(公告)号：US20160085842A1

公开(公告)日：2016-03-24

申请号：US14560297

申请日：2014-12-04

Applicant: NetApp, Inc.

Inventor： Yong Eun Cho ,  Anuja Jaiswal ,  Vani Vully ,  Andrew Dunn ,  Chaitanya Patel ,  Susan M. Coatney

IPC: G06F17/30

CPC classification number: G06F17/30598 ,  G06F3/0614 ,  G06F3/0631 ,  G06F3/067 ,  G06F17/30312

Abstract: A system and method for avoiding object identifier collisions in a cluster environment is provided. Upon creation of the cluster, volume location databases negotiate ranges for data set identifiers (DSIDs) between a first site and a second site of the cluster. Any pre-existing objects are remapped into an object identifier range associated with the particular site hosting the object.

Abstract translation: 提供了一种用于避免集群环境中的对象标识符冲突的系统和方法。 在创建集群后，卷位置数据库协商集群的第一站点和第二站点之间的数据集标识符（DSID）的范围。 任何预先存在的对象被重新映射到与托管对象的特定站点相关联的对象标识符范围内。

公开(公告)号：US12073123B2

公开(公告)日：2024-08-27

申请号：US17963077

申请日：2022-10-10

Applicant: NetApp Inc.

Inventor： Ananthan Subramanian ,  Kumaran Nagappan ,  Sriram Venketaraman ,  Szu-Wen Kuo ,  Yong Eun Cho

IPC: G06F12/00 ,  G06F3/06

CPC classification number: G06F3/0661 ,  G06F3/0608 ,  G06F3/064 ,  G06F3/0673

Abstract: Techniques are provided for compacting indirect blocks. For example, an object is represented as a structure comprising data blocks within which data of the object is stored and indirect blocks comprising block numbers of where the data blocks are located in storage. Block numbers within a set of indirect blocks are compacted into a compacted indirect block comprising a base block number, a count of additional block numbers after the base block number in the compacted indirect block, and a pattern of the block numbers in the compacted indirect block. The compacted indirect block is stored into memory for processing access operations to the object. Storing compacted indirect blocks into memory allows for more block numbers to be stored within memory. In this way, the block numbers are read from memory is faster than loading the block numbers from disk.

公开(公告)号：US20200310697A1

公开(公告)日：2020-10-01

申请号：US16365956

申请日：2019-03-27

Applicant: NetApp Inc.

Inventor： Ananthan Subramanian ,  Kumaran Nagappan ,  Sriram Venketaraman ,  Szu-Wen Kuo ,  Yong Eun Cho

IPC: G06F3/06

Abstract: Techniques are provided for compacting indirect blocks. For example, an object is represented as a structure comprising data blocks within which data of the object is stored and indirect blocks comprising block numbers of where the data blocks are located in storage. Block numbers within a set of indirect blocks are compacted into a compacted indirect block comprising a base block number, a count of additional block numbers after the base block number in the compacted indirect block, and a pattern of the block numbers in the compacted indirect block. The compacted indirect block is stored into memory for processing access operations to the object. Storing compacted indirect blocks into memory allows for more block numbers to be stored within memory. This improves the processing of access operations because reading the block numbers from memory is faster than loading the block numbers from disk.

公开(公告)号：US20180060198A1

公开(公告)日：2018-03-01

申请号：US15803917

申请日：2017-11-06

Applicant: NetApp Inc.

Inventor： Vaiapuri Ramasubramaniam ,  Harihara Kadayam ,  Parag Sarfare ,  Yong Eun Cho ,  Chaitanya Patel ,  Hrishikesh Keremane ,  Prachi Deshmukh

IPC: G06F11/20

CPC classification number: G06F11/2033 ,  G06F11/2028 ,  G06F11/2041 ,  G06F11/2046 ,  G06F11/2097 ,  G06F2201/805

Abstract: A system and method for handling multi-node failures in a disaster recovery cluster is provided. In the event of an error condition, a switchover operation occurs from the failed nodes to one or more surviving nodes. Data stored in non-volatile random access memory is recovered by the surviving nodes to bring storage objects, e.g., disks, aggregates and/or volumes into a consistent state.

公开(公告)号：US10852994B2

公开(公告)日：2020-12-01

申请号：US16365956

申请日：2019-03-27

Applicant: NetApp Inc.

Inventor： Ananthan Subramanian ,  Kumaran Nagappan ,  Sriram Venketaraman ,  Szu-Wen Kuo ,  Yong Eun Cho

IPC: G06F12/00 ,  G06F3/06

Abstract: Techniques are provided for compacting indirect blocks. For example, an object is represented as a structure comprising data blocks within which data of the object is stored and indirect blocks comprising block numbers of where the data blocks are located in storage. Block numbers within a set of indirect blocks are compacted into a compacted indirect block comprising a base block number, a count of additional block numbers after the base block number in the compacted indirect block, and a pattern of the block numbers in the compacted indirect block. The compacted indirect block is stored into memory for processing access operations to the object. Storing compacted indirect blocks into memory allows for more block numbers to be stored within memory.

公开(公告)号：US10521316B2

公开(公告)日：2019-12-31

申请号：US15803917

申请日：2017-11-06

Applicant: NetApp Inc.

Inventor： Vaiapuri Ramasubramaniam ,  Harihara Kadayam ,  Parag Sarfare ,  Yong Eun Cho ,  Chaitanya Patel ,  Hrishikesh Keremane ,  Prachi Deshmukh

IPC: G06F11/00 ,  G06F11/20

Abstract: A system and method for handling multi-node failures in a disaster recovery cluster is provided. In the event of an error condition, a switchover operation occurs from the failed nodes to one or more surviving nodes. Data stored in non-volatile random access memory is recovered by the surviving nodes to bring storage objects, e.g., disks, aggregates and/or volumes into a consistent state.

公开(公告)号：US09959335B2

公开(公告)日：2018-05-01

申请号：US14560297

申请日：2014-12-04

Applicant: NetApp, Inc.

Inventor： Yong Eun Cho ,  Anuja Jaiswal ,  Vani Vully ,  Andrew Dunn ,  Chaitanya Patel ,  Susan M. Coatney

IPC: G06F17/30 ,  G06F3/06

CPC classification number: G06F17/30598 ,  G06F3/0614 ,  G06F3/0631 ,  G06F3/067 ,  G06F17/30312

Abstract: A system and method for avoiding object identifier collisions in a cluster environment is provided. Upon creation of the cluster, volume location databases negotiate ranges for data set identifiers (DSIDs) between a first site and a second site of the cluster. Any pre-existing objects are remapped into an object identifier range associated with the particular site hosting the object.

公开(公告)号：US20160085647A1

公开(公告)日：2016-03-24

申请号：US14559343

申请日：2014-12-03

Applicant: NetApp, Inc.

Inventor： Vaiapuri Ramasubramaniam ,  Harihara Kadayam ,  Parag Sarfare ,  Yong Eun Cho ,  Chaitanya Patel ,  Hrishikesh Keremane ,  Prachi Deshmukh

IPC: G06F11/20

CPC classification number: G06F11/2033 ,  G06F11/2028 ,  G06F11/2041 ,  G06F11/2046 ,  G06F2201/805

Abstract: A system and method for handling multi-node failures in a disaster recovery cluster is provided. In the event of an error condition, a switchover operation occurs from the failed nodes to one or more surviving nodes. Data stored in non-volatile random access memory is recovered by the surviving nodes to bring storage objects, e.g., disks, aggregates and/or volumes into a consistent state.

Abstract translation: 提供了一种用于处理灾难恢复集群中的多节点故障的系统和方法。 在发生错误的情况下，从故障节点到一个或多个幸存节点发生切换操作。 存储在非易失性随机存取存储器中的数据由幸存的节点恢复，以将存储对象（例如，磁盘，聚合和/或卷）带入一致的状态。

公开(公告)号：US11467774B2

公开(公告)日：2022-10-11

申请号：US17083945

申请日：2020-10-29

Applicant: NetApp Inc.

Inventor： Ananthan Subramanian ,  Kumaran Nagappan ,  Sriram Venketaraman ,  Szu-Wen Kuo ,  Yong Eun Cho

IPC: G06F12/00 ,  G06F3/06

Abstract: Techniques are provided for compacting indirect blocks. For example, an object is represented as a structure comprising data blocks within which data of the object is stored and indirect blocks comprising block numbers of where the data blocks are located in storage. Block numbers within a set of indirect blocks are compacted into a compacted indirect block comprising a base block number, a count of additional block numbers after the base block number in the compacted indirect block, and a pattern of the block numbers in the compacted indirect block. The compacted indirect block is stored into memory for processing access operations to the object.