发明名称 Method and apparatus for efficient cache read ahead
摘要 A method for providing improved sequential read performance in a storage controller is provided. In response to the storage controller receiving a host read request from a host computer, the method includes identifying, by the storage controller, a largest burst length of a plurality of burst lengths in a memory of the storage controller, and determining a maximum number of consecutive times between bursts having a value less than a predetermined value. A burst includes a consecutive group of sequential host read requests from the same host computer. The method also includes multiplying the largest burst length of the plurality of burst lengths by the maximum number of consecutive times between bursts having a value less than the predetermined value to obtain an effective burst length and reading into a storage controller cache memory at least the effective burst length of data from storage devices coupled to the storage controller.
申请公布号 US9552297(B2) 申请公布日期 2017.01.24
申请号 US201313952733 申请日期 2013.07.29
申请人 Dot Hill Systems Corporation 发明人 Traut Zachary David;Barrell Michael David
分类号 G06F13/00;G06F12/08 主分类号 G06F13/00
代理机构 代理人 Lavan Thomas J.
主权项 1. A method for providing improved sequential read performance in a storage controller, wherein in response to the storage controller receiving a host read request from a host computer, the method comprising: identifying, by the storage controller, a largest burst length of a plurality of burst lengths in a memory of the storage controller; determining, by the storage controller, a maximum number of consecutive times between bursts having a value less than a predetermined value, wherein a burst comprises a consecutive group of sequential host read requests from the same host computer, wherein a burst length is the total number of bytes of data in a consecutive group of sequential host read requests from the same host computer; multiplying, by the storage controller, the largest burst length of the plurality of burst lengths by the maximum number of consecutive times between bursts having a value less than the predetermined value to obtain an effective burst length; and reading into a storage controller cache memory, by the storage controller, at least the effective burst length of data from storage devices coupled to the storage controller.
地址 Longmont CO US