USING METADATA TO SELECTIVELY PERFORM DATA PRESTAGING
卷宗概要
申请人
International Business Machines Corporation
发明人
Roderick Guy Charles Moore; Paul A. Broadhurst
IPC 分类
CPC 分类
A computer-implemented method, according to one approach, includes: receiving a read request for data in memory and analyzing metadata from volumes that contain the requested data. The metadata maps sequential logical addresses of the requested data to their corresponding physical addresses. The computer-implemented method also includes determining whether the corresponding physical addresses storing the requested data are sequential. In response to determining that at least a predetermined number of the corresponding physical addresses are sequential, the requested data is prestaged from the sequential ones of the physical addresses. However, in response to determining that fewer than the predetermined number of the corresponding physical addresses are sequential, the computer-implemented method includes intentionally refraining from prestaging any of the requested data from the physical addresses.
原文（中文）
A computer-implemented method, according to one approach, includes: receiving a read request for data in memory and analyzing metadata from volumes that contain the requested data. The metadata maps sequential logical addresses of the requested data to their corresponding physical addresses. The computer-implemented method also includes determining whether the corresponding physical addresses storing the requested data are sequential. In response to determining that at least a predetermined number of the corresponding physical addresses are sequential, the requested data is prestaged from the sequential ones of the physical addresses. However, in response to determining that fewer than the predetermined number of the corresponding physical addresses are sequential, the computer-implemented method includes intentionally refraining from prestaging any of the requested data from the physical addresses.