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1.发明公开公开(公告)号：US20240273064A1
公开(公告)日：2024-08-15
申请号：US18641602
申请日：2024-04-22
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.
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公开(公告)号：US20210004353A1
公开(公告)日：2021-01-07
申请号：US17029920
申请日：2020-09-23
Applicant: NetApp, Inc.
Inventor： Sharad Jain , Hrishikesh Ashok Tapaswi , Ling Zheng , Onkar Bhat , Akhil Kaushik
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.
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3.发明授权公开(公告)号：US10346354B2
公开(公告)日：2019-07-09
申请号：US15338272
申请日：2016-10-28
Applicant: NetApp, Inc.
Inventor： Ajay Pratap Singh Kushwah , Ling Zheng , Sharad Jain
IPC: G06F16/11 , G06F16/13 , H04L29/08 , G06F12/121 , G06F11/14
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.
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公开(公告)号：US20170315930A1
公开(公告)日：2017-11-02
申请号：US15141447
申请日：2016-04-28
Applicant: NetApp, Inc.
Inventor： Vinay Hangud , Sharad Jain , Sudhindra Prasad Tirupati Nagaraj
IPC: G06F12/121
CPC classification number: G06F12/121 , G06F12/0804 , G06F12/0868 , G06F2212/1021
Abstract: Exemplary embodiments relate to cache replacement schemes. Incoming data may be sorted into buckets. When it comes time to replace information in the cache, an entire bucket may be eliminated or replaced at once. By sorting incoming data into the buckets and performing cache replacement on a bucket-by-bucket basis, cache fragmentation is reduced. Moreover, the buckets may be scored based on characteristics of the data in the buckets (e.g., whether a data item is cold archived, whether a customer has pinned the data item, or whether the customer has requested early eviction of the data item). By accounting for these metrics when the cache score is calculated, cache usage and hit rates may be improved. According to exemplary embodiments, scoring may be applied to entire buckets, or may be applied to individual cache items (e.g., for use as a cache replacement metric in a cache eviction scheme).
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公开(公告)号：US12099467B2
公开(公告)日：2024-09-24
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
CPC classification number: G06F16/128 , G06F11/1448 , G06F11/1464 , G06F11/1469 , G06F16/13 , 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.
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Patent Agency Ranking
6.发明授权公开(公告)号：US11966361B2
公开(公告)日：2024-04-23
申请号：US17536515
申请日：2021-11-29
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.
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公开(公告)号：US10282099B1
公开(公告)日：2019-05-07
申请号：US15796467
申请日：2017-10-27
Applicant: NetApp, Inc.
Inventor： Ajay Pratap Singh Kushwah , Ling Zheng , Sharad Jain
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.
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公开(公告)号：US11768803B2
公开(公告)日：2023-09-26
申请号：US17029920
申请日：2020-09-23
Applicant: NetApp, Inc.
Inventor： Sharad Jain , Hrishikesh Ashok Tapaswi , Ling Zheng , Onkar Bhat , Akhil Kaushik
CPC classification number: G06F16/128 , G06F11/1448 , G06F11/1464 , G06F11/1469 , G06F16/13 , 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.
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公开(公告)号：US10915246B2
公开(公告)日：2021-02-09
申请号：US16411880
申请日：2019-05-14
Applicant: NetApp, Inc.
Abstract: A method, non-transitory computer readable medium, and device that assists with managing cloud storage includes identifying a portion of data in a data unit identified for deletion in the metadata. The identified portion of the data identified for delete is compare to a threshold amount. Deletion of the data unit from a first storage object is deferred when the determined portion of data identified for deletion is less than the threshold amount. A second storage object with a portion of data unmarked for deletion in the data unit is generated when the determined portion of data marked for deletion is equal to the threshold amount, wherein the second storage object has a same identifier as the first storage object.
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公开(公告)号：US10824589B2
公开(公告)日：2020-11-03
申请号：US15338219
申请日：2016-10-28
Applicant: NetApp, Inc.
Inventor： Sharad Jain , Hrishikesh Ashok Tapaswi , Ling Zheng , Onkar Bhat , Akhil Kaushik
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.
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