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公开(公告)号：US11216186B1
公开(公告)日：2022-01-04
申请号：US15393443
申请日：2016-12-29
发明人： Philippe Armangau , Ivan Bassov , Monica Chaudhary , Ajay Karri
摘要： A method is used in managing inline data compression in storage systems. A request is received to flush data of a file system to a storage device of a storage system. A compression ratio is determined for writing the data to the storage device in a compressed format. Based on the determination, a number of allocation units is determined in which a segment is apportioned. The segment comprises of a set of allocation units in the compressed format. Based on the determination, the data is written to the segment in the compressed format.
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公开(公告)号：US11048419B2
公开(公告)日：2021-06-29
申请号：US16262423
申请日：2019-01-30
发明人： Philippe Armangau , Yining Si , Kamakshi Viswanadha , Ajay Karri
摘要： A technique for managing storage of compressed data includes generating and enforcing a minimum slot size requirement. The minimum slot size is based at least in part on collected performance metrics that indicate a degree of compressibility of data received, compressed, and written by the data storage system. As new data arrive, the new data are compressed and stored in slots at least as big as the minimum slot size, in many cases effecting an over-allocation of storage space and improving the likelihood that subsequent overwrites will fit into existing slots.
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公开(公告)号：US20210133156A1
公开(公告)日：2021-05-06
申请号：US16674555
申请日：2019-11-05
摘要： A method, computer program product, and computing system for maintaining a first cursor pointer for a memory system, wherein the first cursor pointer concerns a first search criteria and identifies an initial first cursor starting location; receiving a first search request for the memory system that satisfies the first search criteria; executing the first search request within an initial first search window starting at the initial first cursor starting location; and updating the first cursor pointer to identify an updated first cursor starting location based, at least in part, upon the initial first search window.
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公开(公告)号：US20210124680A1
公开(公告)日：2021-04-29
申请号：US16663507
申请日：2019-10-25
IPC分类号： G06F12/02
摘要： Coordinating a reclaiming of data storage space among processing nodes of a data storage system includes, by a first node in response to an event, performing local cleanup of first-node mapping data and issuing a request message to a second node, the request message identifying the data storage space to be reclaimed. The event may be a notification from a RAID component rebuilding a RAID volume. In response to the request message, the second node performs local cleanup of second-node mapping data and issues a completion message to the first node indicating that the second node has completed its part of the reclaiming of the data storage space. The first node responds to the completion message by marking the data storage space as being reclaimed and signaling to a source of the event that the data storage space is available for new use.
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公开(公告)号：US20200133549A1
公开(公告)日：2020-04-30
申请号：US16176738
申请日：2018-10-31
摘要： A technique for writing data in a data storage system includes aggregating data received in a set of I/O requests into a batch that includes multiple extents of data. After compressing a current extent of the batch and determining that the compressed extent does not fit in a space where a previous version of the extent is stored, the technique performs a batch-relocate operation by gathering a set of mapping metadata for mapping each of the extents in the batch, identifying a set of holes indicated by the set of mapping metadata, and adding the holes to a batch-hole list. The technique then selects a hole, from the batch-hole list, which is big enough to accommodate the compressed extent, and places the compressed extent in the selected hole.
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公开(公告)号：US12050807B2
公开(公告)日：2024-07-30
申请号：US17239281
申请日：2021-04-23
CPC分类号： G06F3/0659 , G06F3/0614 , G06F3/0635 , G06F3/0653 , G06F3/067
摘要： A method, computer program product, and computing system for defining a quantity of discrete storage portions within a storage system; entering an expansion mode during which the discrete storage portions are incrementally assigned to at least one processing node until a first assignment level target is achieved; once the first assignment level target is achieved, entering a utilization mode during which the utilization of the assigned discrete portions is increased until a first utilization level target is achieved; and once the first utilization level target is achieved, reentering the expansion mode during which additional discrete storage portions are incrementally assigned to the at least one processing node until a second assignment level target is achieved.
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公开(公告)号：US11726991B2
公开(公告)日：2023-08-15
申请号：US16398763
申请日：2019-04-30
发明人： Yubing Wang , Philippe Armangau , Ajay Karri
CPC分类号： G06F16/2386 , G06F16/13 , G06F16/1865
摘要： A technique for managing a metadata transaction log consolidates multiple mapping pointer changes that affect a single metadata block in a single transaction entry. The technique creates a data structure that identifies the mapping pointers in the metadata block that are changing, and stores the data structure in the transaction entry along with records that describe the individual mapping pointer changes.
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公开(公告)号：US11556260B2
公开(公告)日：2023-01-17
申请号：US16815348
申请日：2020-03-11
发明人： Geng Han , Vamsi K. Vankamamidi , Shuyu Lee , Jian Gao , Xiaobo Zhang , Rongrong Shang , Ajay Karri
摘要： Techniques are directed to managing Redundant Array of Independent Disks (RAID) storage space. One technique involves providing, by RAID circuitry, a storage space request to mapper circuitry; receiving, by the RAID circuitry, a storage space reply from the mapper circuitry in response to the storage space request; and performing, by the RAID circuitry, a follow-up operation based on the storage space reply from the mapper circuitry. Another technique involves, receiving, by mapper circuitry, a storage space request from RAID circuitry; performing, by the mapper circuitry, a storage space management operation in response to the storage space request; and providing, by the mapper circuitry, a storage space reply to the RAID circuitry, the storage space reply identifying a result of the storage space management operation.
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公开(公告)号：US11210236B2
公开(公告)日：2021-12-28
申请号：US16659940
申请日：2019-10-22
IPC分类号： G06F12/126 , G06F12/0804
摘要： A data storage system performs updating of a set of global counters stored in persistent storage accessible to a plurality of processing nodes of a data storage system, the global counters storing respective global count values describing associated units of data storage shared by the processing nodes for performing data storage operations. The updating includes, by each processing node, using a respective set of in-memory delta counters storing respective delta count values to track changes to respective global count values due to data storage operations performed by the processing node with respect to the units of data storage. A summarization process is regularly executed to merge the delta count values of the delta counters of all processing nodes into the respective global counters.
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公开(公告)号：US10922027B2
公开(公告)日：2021-02-16
申请号：US16179256
申请日：2018-11-02
发明人： Philippe Armangau , Ivan Bassov , John Didier , Ajay Karri
摘要： There is disclosed techniques for use in managing data storage in storage systems. For example, in one embodiment, there is disclosed a method comprising receiving a request to store data of a data object in a storage system. The method also comprising determining that at least a portion of the data is to be stored in an uncompressed format in the storage system in response to receiving the request. The method also comprising storing at least a portion of the data in the uncompressed format in an allocation unit of a segment in the storage system such that the stored data in the uncompressed format emulates stored data in a compressed format based on the said determination.
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