公开(公告)号：US10235288B2

公开(公告)日：2019-03-19

申请号：US14874157

申请日：2015-10-02

Applicant: NetApp, Inc.

Inventor： Arindam Banerjee ,  Donald R Humlicek ,  Scott Terrill

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.