公开(公告)号：US20170220476A1

公开(公告)日：2017-08-03

申请号：US15010928

申请日：2016-01-29

Applicant: NetApp, Inc.

Inventor： Yanling Qi ,  Junjie Qian ,  Somasundaram Krishnasamy

IPC: G06F12/08 ,  G06F3/06

CPC classification number: G06F12/0888 ,  G06F2212/60

Abstract: A method includes: communicating read requests from a host device to either a storage array controller or a data cache associated with the host device; classifying portions of data, in response to the read requests, according to frequency of access of the respective portions of data; and causing the storage array controller to either promote a first portion of data to a data cache associated with the storage array controller or demote the first portion of data from the data cache associated with the storage array controller in response to a change in cache status of the first portion of data at the data cache associated with the host device and in response to frequency of access of the first portion of data.