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公开(公告)号：US11416462B2
公开(公告)日：2022-08-16
申请号：US16927257
申请日：2020-07-13
IPC分类号： G06F16/215 , G06F13/20 , G06F16/245 , G06F16/22 , G06F16/174
摘要： Data deduplication techniques may use a fingerprint hash table and a backend location hash table in connection with performing operations including fingerprint insertion, fingerprint deletion and fingerprint lookup. Processing I/O operations may include: receiving a write operation that writes data to a target logical address; determining a fingerprint for the data; querying the fingerprint hash table using the fingerprint to determine a matching entry of the fingerprint hash table for the fingerprint; and responsive to determining that the fingerprint hash table does not have the matching entry that matches the fingerprint, performing processing including: inserting a first entry in the fingerprint hash table, wherein the first entry includes the fingerprint for the data and identifies a storage location at which the data is stored; and inserting a second entry in a backend location hash table, wherein the second entry references the first entry.
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公开(公告)号：US11315028B2
公开(公告)日：2022-04-26
申请号：US17010945
申请日：2020-09-03
发明人： Deepak Vokaliga , Rong Yu
摘要： A method of increasing the accuracy of predicting future IO operations on a storage system includes creating a snapshot of a production volume, linking the snapshot to a thin device, mounting the thin device in a cloud tethering subsystem, and tagging the thin device to identify the thin device as being used by the cloud tethering subsystem. When data read operations are issued by the cloud tethering subsystem on the tagged thin device, the data read operations are executed by a front-end adapter of the storage system to forward data associated with the data read operations to a cloud repository. The cache manager, however, does not use information about data read operations on tagged thin devices in connection with predicting future IO operations on the cache, so that movement of snapshots to the cloud repository do not skew the algorithms being used by the cache manager to perform cache management.
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公开(公告)号：US10579529B2
公开(公告)日：2020-03-03
申请号：US15964315
申请日：2018-04-27
发明人： Venkata Khambam , Jeffrey R. Nelson , Brian Asselin , Rong Yu
IPC分类号： G06F12/00 , G06F12/084 , G06F12/0842 , G06F12/0815
摘要： Maintaining multiple cache areas in a storage device having multiple processors includes loading data from a specific portion of non-volatile storage into a local cache slot in response to a specific processor of a first subset of the processors performing a read operation to the specific portion of non-volatile storage, where the local cache slot is accessible to the first subset of the processors and is inaccessible to a second subset of the processors that is different than the first subset of the processors and includes converting the local cache slot into a global cache slot in response to one of the processors performing a write operation to the specific portion of non-volatile storage, wherein the global cache area is accessible to the first subset of the processors and to the second subset of the processors. Different ones of the processors may be placed on different directors.
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公开(公告)号：US09830266B1
公开(公告)日：2017-11-28
申请号：US14156678
申请日：2014-01-16
发明人： Rong Yu , Orit Levin-Michael , John W. Lefferts , Pei-Ching Hwang , Peng Yin , Yechiel Yochai , Dan Aharoni , Qun Fan , Stephen Richard Ives
IPC分类号： G06F12/00 , G06F12/0862
CPC分类号： G06F12/0862 , G06F2212/6024
摘要： Described are techniques for processing a data operation in a data storage system. A front-end component of the data storage system receives the data operation. In response to receiving the data operation, the front-end component performs first processing. The first processing includes determining whether the data operation is a read operation requesting to read a data portion which results in a cache miss; and if said determining determines that the data operation is a read operation resulting in a cache miss, performing read miss processing. Read miss processing includes sequential stream recognition processing performed by the front-end component to determine whether the data portion is included in a sequential stream.
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公开(公告)号：US20220358103A1
公开(公告)日：2022-11-10
申请号：US17864717
申请日：2022-07-14
IPC分类号： G06F16/215 , G06F13/20 , G06F16/245 , G06F16/22 , G06F16/174
摘要： Data deduplication techniques may use a fingerprint hash table and a backend location hash table in connection with performing operations including fingerprint insertion, fingerprint deletion and fingerprint lookup. Processing I/O operations may include: receiving a write operation that writes data to a target logical address; determining a fingerprint for the data; querying the fingerprint hash table using the fingerprint to determine a matching entry of the fingerprint hash table for the fingerprint; and responsive to determining that the fingerprint hash table does not have the matching entry that matches the fingerprint, performing processing including: inserting a first entry in the fingerprint hash table, wherein the first entry includes the fingerprint for the data and identifies a storage location at which the data is stored; and inserting a second entry in a backend location hash table, wherein the second entry references the first entry.
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公开(公告)号：US11340805B1
公开(公告)日：2022-05-24
申请号：US17157204
申请日：2021-01-25
发明人： Peng Wu , Rong Yu , Jingtong Liu
IPC分类号： G06F3/06
摘要： A storage array packs multiple non-full-size front-end tracks into slices that contain multiple back-end tracks. A greedy first fit packing algorithm is used to find packing solutions that are cached and ranked. The cached, ranked packing solutions are used by attempting to find matches with bucketed front-end tracks to be relocated. New packing solutions are generated and cached when matches cannot be found. Packing solutions may be shared outside the domain in which they are discovered.
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公开(公告)号：US11243890B2
公开(公告)日：2022-02-08
申请号：US16742201
申请日：2020-01-14
IPC分类号： G06F12/0897
摘要： Embodiments of the present disclosure relate to verifying compressed data. Compressed data files can be read from a global cache for a storage device into a local buffer. A data verification level of a plurality of data verification levels can be selected to perform on the compressed data files. An amount of data blocks of each data file can be decompressed based on the determined data verification level. An integrity of the compressed data files verified using the decompressed data blocks.
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公开(公告)号：US20220012218A1
公开(公告)日：2022-01-13
申请号：US16927257
申请日：2020-07-13
IPC分类号： G06F16/215 , G06F16/22 , G06F16/245 , G06F13/20
摘要： Data deduplication techniques may use a fingerprint hash table and a backend location hash table in connection with performing operations including fingerprint insertion, fingerprint deletion and fingerprint lookup. Processing I/O operations may include: receiving a write operation that writes data to a target logical address; determining a fingerprint for the data; querying the fingerprint hash table using the fingerprint to determine a matching entry of the fingerprint hash table for the fingerprint; and responsive to determining that the fingerprint hash table does not have the matching entry that matches the fingerprint, performing processing including: inserting a first entry in the fingerprint hash table, wherein the first entry includes the fingerprint for the data and identifies a storage location at which the data is stored; and inserting a second entry in a backend location hash table, wherein the second entry references the first entry.
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公开(公告)号：US20210311852A1
公开(公告)日：2021-10-07
申请号：US16838079
申请日：2020-04-02
发明人： Ramesh Doddaiah , Malak Alshawabkeh , Mohammed Asher , Rong Yu
摘要： Embodiments of the present disclosure relate to throttling processing threads of a storage device. One or more input/output (I/O) workloads of a storage device can be monitored. One or more resources consumed by each thread of each storage device component to process each operation included in a workload can be analyzed. Based on the analysis, consumption of each resource consumed by each thread can be controlled.
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公开(公告)号：US20210216468A1
公开(公告)日：2021-07-15
申请号：US16742201
申请日：2020-01-14
IPC分类号： G06F12/0897
摘要： Embodiments of the present disclosure relate to verifying compressed data. Compressed data files can be read from a global cache for a storage device into a local buffer. A data verification level of a plurality of data verification levels can be selected to perform on the compressed data files. An amount of data blocks of each data file can be decompressed based on the determined data verification level. An integrity of the compressed data files verified using the decompressed data blocks.
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