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公开(公告)号：US20220137822A1
公开(公告)日：2022-05-05
申请号：US17084191
申请日：2020-10-29
摘要： Accessing additional storage space of a storage system includes reading a physical data fragment that is an incremental subset of a physical storage unit of the storage system, accessing metadata corresponding to logical blocks stored on the physical data fragment to determine a sidebar storage portion of the physical data fragment that is unused by the logical blocks, and accessing data of the sidebar storage portion. Accessing data of the sidebar storage portion may include providing data from the sidebar storage portion to a calling process. Accessing data of the sidebar storage portion may include modifying a portion of data from the physical data fragment and writing the physical data fragment back to the physical storage device. The physical data fragment may be locked prior to reading the physical data fragment and the physical data fragment may be unlocked after writing the physical data fragment.
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公开(公告)号：US10896153B2
公开(公告)日：2021-01-19
申请号：US15941218
申请日：2018-03-30
IPC分类号： G06F16/00 , G06F16/174 , G06F16/13 , G06F16/14
摘要： The system, devices, and methods disclosed herein relate to data ratio reduction technology adapted to reduce storage costs by weeding out duplicative data write operations. The techniques and systems disclosed achieve deduplication benefits of smaller block, finer granularity, deduplication systems while simultaneously reducing the enormous metadata costs traditionally associated with small block deduplication. According to an exemplary 128 K block deduplication system and method, we disclose deduplication rates nearly equivalent to 4 K deduplication systems.
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3.发明授权公开(公告)号：US10776290B1
公开(公告)日：2020-09-15
申请号：US16568576
申请日：2019-09-12
发明人： Peng Wu , Rong Yu , Jeremy J. O'Hare
摘要： Techniques for processing I/O operations includes: determining whether a current amount of unused physical storage is greater than a threshold; and responsive to determining the current amount of unused physical storage is greater than the threshold, performing normal write processing, and otherwise performing alternative write processing. The alternative write processing includes: initializing a counter; determining whether a physical storage allocation is needed or potentially needed for a write I/O operation; responsive to determining that no physical storage allocation is needed for the write I/O operation, performing the normal write processing. Responsive to determining that a physical storage allocation is needed or potentially needed for the write I/O operation, determining a first amount of one or more credits needed to service the write I/O operation; and responsive to determining the counter does not include at least the first amount of one or more credits, failing the write I/O operation.
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公开(公告)号：US10346064B1
公开(公告)日：2019-07-09
申请号：US15395133
申请日：2016-12-30
发明人： Jeremy J. O'Hare , Guy Rososhansky
IPC分类号： G06F3/06
摘要： A technique manages compression based on host data initially residing on a source storage array. The technique involves providing, based on source segments of the host data while the host data initially resides on the source storage array, compressibility labels (or tags) that label the source segments of the host data. Each compressibility label indicates a projected compression level for a respective source segment of the host data. The technique further involves generating a compression profile based on the compressibility labels that label the source segments of the host data. The technique further involves providing, based on the compression profile, a compression tier configuration that defines a prearrangement of compression tiers on a target storage array that receives the host data from the source storage array, the prearrangement of compression tiers providing storage units of allocation having different predefined sizes.
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公开(公告)号：US20210271607A1
公开(公告)日：2021-09-02
申请号：US16803083
申请日：2020-02-27
发明人： Anoop Raghunathan , Roman Gramc , Stephen M. Lathrop , David K. Aha , Christopher W. Appleby , Garret Bourke , Jeremy J. O'Hare
IPC分类号： G06F12/123 , G06F12/06
摘要： Techniques for processing data may include: receiving source physical storage allocation units that include valid data and one or more holes of unused physical storage, wherein each source physical storage allocation unit has an associated timestamp denoting a most recent destaging time of any data stored on the source physical storage allocation unit; determining an age for each source physical allocation unit based on the associated timestamp of the source physical allocation unit; for each source physical storage allocation unit, determining one of multiple age buckets for the source physical allocation unit based on the age of the source physical allocation unit; and for a first of the age buckets including two source physical allocation units, performing first processing including: relocating at least some valid data from the two source physical storage allocation units to a target physical storage allocation unit.
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公开(公告)号：US20190303454A1
公开(公告)日：2019-10-03
申请号：US15941218
申请日：2018-03-30
IPC分类号： G06F17/30
摘要： The system, devices, and methods disclosed herein relate to data ratio reduction technology adapted to reduce storage costs by weeding out duplicative data write operations. The techniques and systems disclosed achieve deduplication benefits of smaller block, finer granularity, deduplication systems while simultaneously reducing the enormous metadata costs traditionally associated with small block deduplication. According to an exemplary 128 K block deduplication system and method, we disclose deduplication rates nearly equivalent to 4 K deduplication systems.
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公开(公告)号：US11513687B2
公开(公告)日：2022-11-29
申请号：US17084191
申请日：2020-10-29
摘要： Accessing additional storage space of a storage system includes reading a physical data fragment that is an incremental subset of a physical storage unit of the storage system, accessing metadata corresponding to logical blocks stored on the physical data fragment to determine a sidebar storage portion of the physical data fragment that is unused by the logical blocks, and accessing data of the sidebar storage portion. Accessing data of the sidebar storage portion may include providing data from the sidebar storage portion to a calling process. Accessing data of the sidebar storage portion may include modifying a portion of data from the physical data fragment and writing the physical data fragment back to the physical storage device. The physical data fragment may be locked prior to reading the physical data fragment and the physical data fragment may be unlocked after writing the physical data fragment.
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公开(公告)号：US11157419B2
公开(公告)日：2021-10-26
申请号：US16803083
申请日：2020-02-27
发明人： Anoop Raghunathan , Roman Gramc , Stephen M. Lathrop , David K. Aha , Christopher W. Appleby , Garret Bourke , Jeremy J. O'Hare
IPC分类号： G06F12/12 , G06F12/123 , G06F12/06
摘要： Techniques for processing data may include: receiving source physical storage allocation units that include valid data and one or more holes of unused physical storage, wherein each source physical storage allocation unit has an associated timestamp denoting a most recent destaging time of any data stored on the source physical storage allocation unit; determining an age for each source physical allocation unit based on the associated timestamp of the source physical allocation unit; for each source physical storage allocation unit, determining one of multiple age buckets for the source physical allocation unit based on the age of the source physical allocation unit; and for a first of the age buckets including two source physical allocation units, performing first processing including: relocating at least some valid data from the two source physical storage allocation units to a target physical storage allocation unit.
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公开(公告)号：US20190340262A1
公开(公告)日：2019-11-07
申请号：US15968825
申请日：2018-05-02
发明人： Jeremy J. O'Hare , Rong Yu , Peng Wu , Michael J. Scharland
IPC分类号： G06F17/30
摘要： The system, devices, and methods disclosed herein relate to data ratio reduction technology adapted to reduce storage costs by weeding out duplicative data write operations. The techniques and systems disclosed achieve deduplication benefits by reducing the size of hash values stored hash tables used to compare unwritten data blocks to data that has already been written and stored somewhere in physical storage. The data deduplication systems, methods, and products facilitate deduplication at the block level as well as for misaligned data chunks within data blocks, that is an unwritten data block that has been stored sequentially in two different physical locations. The deduplication teachings herein are amenable to varying data block sizes as well as data chunk sizes within blocks. Our embodiments enhance computer performance by substantially reducing computational speeds and storage requirements attendant to deduplication systems using larger hash table data sizes.
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