- Patent Title: Cache flushing and interrupted write handling in storage systems
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Application No.: US14874157Application Date: 2015-10-02
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Publication No.: US10235288B2Publication Date: 2019-03-19
- Inventor: Arindam Banerjee , Donald R Humlicek , Scott Terrill
- Applicant: NetApp, Inc.
- Applicant Address: US CA Sunnyvale
- Assignee: NETAPP, INC.
- Current Assignee: NETAPP, INC.
- Current Assignee Address: US CA Sunnyvale
- Agency: Haynes and Boone, LLP
- Main IPC: G06F12/00
- IPC: G06F12/00 ; G06F12/0804 ; G06F12/12 ; G06F12/0868 ; G06F12/0891 ; G06F12/126

Abstract:
Systems and techniques for cache management are disclosed that provide improved cache performance by prioritizing particular storage stripes for cache flush operations. The systems and techniques may also leverage features of the storage devices to provide atomicity without the overhead of inter-controller mirroring. In some embodiments, the systems and techniques include a storage controller that stores data in a cache. The data is associated with one or more sectors of a storage stripe that is defined over plurality of storage devices. The storage controller identifies a locality of dirty sectors of the one or more sectors, classifies the storage stripe into a category based on the locality, provides a category ordering of the category relative to at least one other category, and flushes the storage stripe from the cache to the plurality of storage devices according to the category ordering.
Public/Granted literature
- US20170097886A1 Cache Flushing and Interrupted Write Handling in Storage Systems Public/Granted day:2017-04-06
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