公开(公告)号：US20190294586A1

公开(公告)日：2019-09-26

申请号：US16435829

申请日：2019-06-10

Applicant: NetApp Inc.

Inventor： Ajay Pratap Singh Kushwah ,  Ling Zheng ,  Sharad Jain

IPC: G06F16/11 ,  G06F16/13 ,  G06F11/14 ,  G06F12/121 ,  H04L29/08

Abstract: 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.

公开(公告)号：US20190129621A1

公开(公告)日：2019-05-02

申请号：US15796467

申请日：2017-10-27

Applicant: NetApp, Inc.

Inventor： Ajay Pratap Singh Kushwah ,  Ling Zheng ,  Sharad Jain

IPC: G06F3/06 ,  G06F11/14

Abstract: 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.

公开(公告)号：US12007944B2

公开(公告)日：2024-06-11

申请号：US17536515

申请日：2021-11-29

Applicant: NetApp Inc.

Inventor： Ajay Pratap Singh Kushwah ,  Ling Zheng ,  Sharad Jain

IPC: G06F16/11 ,  G06F11/14 ,  G06F12/121 ,  G06F16/13 ,  H04L67/568

CPC classification number: G06F16/128 ,  G06F11/1448 ,  G06F11/1464 ,  G06F12/121 ,  G06F16/13 ,  H04L67/568

Abstract: 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.

公开(公告)号：US20230334013A1

公开(公告)日：2023-10-19

申请号：US18333627

申请日：2023-06-13

Applicant: NetApp. Inc.

Inventor： Sharad Jain ,  Hrishikesh Ashok Tapaswi ,  Ling Zheng ,  Onkar Bhat ,  Akhil Kaushik

IPC: G06F16/11 ,  G06F16/13 ,  G06F11/14

CPC classification number: G06F16/128 ,  G06F16/13 ,  G06F11/1464 ,  G06F11/1448 ,  G06F11/1469 ,  G06F2201/805 ,  G06F2201/84

Abstract: A storage appliance arranges snapshot data and snapshot metadata into different structures, and arranges the snapshot metadata to facilitate efficient snapshot manipulation, which may be for snapshot management or snapshot restore. The storage appliance receives snapshots according to a forever incremental configuration and arranges snapshot metadata into different types of records. The storage appliance stores these records in key-value stores maintained for each defined data collection (e.g., volume). The storage appliance arranges the snapshot metadata into records for inode information, records for directory information, and records that map source descriptors of data blocks to snapshot file descriptors. The storage appliance uses a locally generated snapshot identifier as a key prefix for the records to conform to a sort constrain of the key-value store, which allows the efficiency of the key-value store to be leveraged. The snapshot metadata arrangement facilitates efficient snapshot restore, file restore, and snapshot reclamation.

公开(公告)号：US20220083505A1

公开(公告)日：2022-03-17

申请号：US17536515

申请日：2021-11-29

Applicant: NetApp Inc.

Inventor： Ajay Pratap Singh Kushwah ,  Ling Zheng ,  Sharad Jain

IPC: G06F16/11 ,  G06F16/13 ,  G06F11/14 ,  G06F12/121 ,  H04L29/08

Abstract: 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.

公开(公告)号：US20190129810A1

公开(公告)日：2019-05-02

申请号：US15795551

申请日：2017-10-27

Applicant: NetApp, Inc.

Inventor： Ajay Pratap Singh Kushwah ,  Ling Zheng ,  Sharad Jain

IPC: G06F11/14 ,  G06F17/30

Abstract: A storage appliance can be designed to facilitate efficient restore of multiple backed up files in a system that allows files to share data blocks. A data management application or storage OS names data blocks and communicates those names to the storage appliance when backing up to or through the storage appliance. The storage appliance can leverage the data block names when restoring a group of files by restoring at data block granularity instead of file granularity. Restoring at the granularity of the data blocks by their names allows the storage appliance to avoid repeatedly sending a same data block to the restore requestor (e.g., a storage OS or data management application) while still instructing the restore requestor how to reconstruct the corresponding file(s) with mappings between valid data ranges and the named data blocks.

公开(公告)号：US20170249349A1

公开(公告)日：2017-08-31

申请号：US15054685

申请日：2016-02-26

Applicant: NETAPP, INC.

Inventor： Onkar Bhat ,  Sharad Jain ,  Pramodh Pisupati

IPC: G06F17/30

CPC classification number: G06F16/2365 ,  G06F16/1748 ,  G06F16/2228 ,  G06F16/2379

Abstract: A remote data storage system for providing one or more mobile devices with a remote data store. The system may include a cloud platform with a storage management application and a data store. A mobile storage application may operate on a mobile device to enable the mobile device to interact with the storage management application. The storage management application may condition data for exchange between the mobile device and the data store. The conditioning of data may include the replacement of duplicate data subsets with references to equivalent data subsets. Other embodiments are described and claimed.

公开(公告)号：US20170220284A1

公开(公告)日：2017-08-03

申请号：US15011155

申请日：2016-01-29

Applicant: NetApp, Inc.

Inventor： Sharad Jain ,  Sudhindra Prasad Tirupati Nagaraj ,  Vinay Hangud

IPC: G06F3/06 ,  G06F17/30

CPC classification number: G06F3/0631 ,  G06F3/0604 ,  G06F3/061 ,  G06F3/064 ,  G06F3/0644 ,  G06F3/0671 ,  G06F3/0673 ,  G06F3/0683 ,  G06F16/2282

Abstract: Exemplary embodiments address the problem of disk fragmentation by using the heuristics of write operations to assign block sizes. As write requests are received, a storage system may register a size of the write request. Using the registered sizes, the storage system may identify one or more clusters of sizes at which write requests are particularly prevalent. The storage system may calculate a distribution or variance for block sizes centered on each cluster. The distribution or variance may be used to distribute the block sizes such that the block sizes change by a small amount in the vicinity of the cluster, and by a larger amount as the blocks move away from the center of the cluster. When it comes time to allocate new blocks, the clusters and distribution may be consulted to determine what sizes of blocks to allocate, and how many blocks of each size.

公开(公告)号：US11188500B2

公开(公告)日：2021-11-30

申请号：US16435829

申请日：2019-06-10

Applicant: NetApp Inc.

Inventor： Ajay Pratap Singh Kushwah ,  Ling Zheng ,  Sharad Jain

IPC: G06F16/11 ,  G06F16/13 ,  G06F11/14 ,  G06F12/121 ,  H04L29/08

Abstract: 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.

公开(公告)号：US20180121454A1

公开(公告)日：2018-05-03

申请号：US15338272

申请日：2016-10-28

Applicant: NetApp, Inc.

Inventor： Ajay Pratap Singh Kushwah ,  Ling Zheng ,  Sharad Jain

IPC: G06F17/30 ,  G06F12/121 ,  H04L29/08

CPC classification number: G06F16/128 ,  G06F11/1448 ,  G06F11/1464 ,  G06F12/121 ,  G06F16/13 ,  H04L67/2842

Abstract: 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.