公开(公告)号：GB2528333A

公开(公告)日：2016-01-20

申请号：GB201414485

申请日：2014-07-15

Applicant: IBM

Inventor： ILIADIS ILIAS ,  JELITTO JENS ,  KIM YUSIK ,  SARAFIJANOVIC SLAVISA ,  VENKATESAN VINODH

IPC: G06F3/06

Abstract: A device and method for determining a number of storage devices for each tier in a multi-tiered storage system comprises; classifying and assigning data to the tiers based on parameters indicating characteristics of both the data and the storage devices and a further set of parameters defining configuration rules; determining the number of storage devices assigned to each of the tiers based on the data assignment, a received cost value and an estimated performance metric; updating the further set of parameters; and re-assigning the data based on the update further set of parameters. The data characteristics might comprise data unit size, an average request size, and an average request rate. The device characteristics might comprise storage capacity, bandwidth and a seek time. The re-assignment of the data might be iterated in a control loop, which is terminated when the estimated performance metric fulfils a termination condition.