公开(公告)号：US20200278799A1

公开(公告)日：2020-09-03

申请号：US16730608

申请日：2019-12-30

Applicant: ORACLE INTERNATIONAL CORPORATION

Inventor： KISHY KUMAR ,  AKSHAY SHAH ,  KOTHANDA UMAMAGESWARAN

IPC: G06F3/06

Abstract: The techniques described herein limit client utilization of a parallel-access storage device. Specifically, client utilization of a particular storage device is estimated using I/O cost metrics to estimate the costs of I/O requests from the client to the particular storage device. The I/O cost metrics are determined based on calibration-based system performance data, which represents a system-wide measure of storage device performance for a system in which the particular storage device resides. The calibration-based system performance data includes one or both of composite throughput data and composite IOPS data for multiple parallel-access devices in the system. The cost estimates for I/O requests issued from a client to a parallel-access device are tracked in a total cost estimate for the client. Client utilization of the storage device, as tracked by the total cost estimate for the client, is limited to a percentage of the total estimated bandwidth of the storage device.