Feedback performance control for computer systems

An LPV approach

Wubi Qin, Qian Wang

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

There has been increasing research effort in applying control-theoretic approaches to performance management for computer systems such as web servers, database systems, and storage systems. Since today's Internet servers and applications are often operated under dynamically changing load conditions, linear control designs may not suffice to provide desired performance guarantees. This paper presents a Linear-Parameter-Varying (LPV) approach to the modeling and performance control of web servers in order to achieve performance-based Service Level Agreement (SLA). In particular, admission control for web servers is used as a case study. By applying system identification to empirical data, an LPV system is developed to approximate the dynamics of web server admission control from rejection ratio to response time, where the time-varying workload parameters are chosen as scheduling variables. An LPV robust control is then designed to meet response time SLA. The performance of the LPV control is compared with that of a linear design. By exploring the nature of dependence of server performance on time-varying load and operating conditions, the proposed general framework are applicable to a diverse spectrum of server-based applications. The utilization of scheduling parameters can be generalized to accommodate more sophisticated workload characterization and complicated server environments.

Original languageEnglish (US)
Article numberFrC07.1
Pages (from-to)4760-4765
Number of pages6
JournalProceedings of the American Control Conference
Volume7
StatePublished - 2005

Fingerprint

Computer systems
Servers
Feedback
Access control
Scheduling
Response time (computer systems)
Robust control
Identification (control systems)
Internet

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

@article{c3686852c9624bb5a0cd66e8637f270b,
title = "Feedback performance control for computer systems: An LPV approach",
abstract = "There has been increasing research effort in applying control-theoretic approaches to performance management for computer systems such as web servers, database systems, and storage systems. Since today's Internet servers and applications are often operated under dynamically changing load conditions, linear control designs may not suffice to provide desired performance guarantees. This paper presents a Linear-Parameter-Varying (LPV) approach to the modeling and performance control of web servers in order to achieve performance-based Service Level Agreement (SLA). In particular, admission control for web servers is used as a case study. By applying system identification to empirical data, an LPV system is developed to approximate the dynamics of web server admission control from rejection ratio to response time, where the time-varying workload parameters are chosen as scheduling variables. An LPV robust control is then designed to meet response time SLA. The performance of the LPV control is compared with that of a linear design. By exploring the nature of dependence of server performance on time-varying load and operating conditions, the proposed general framework are applicable to a diverse spectrum of server-based applications. The utilization of scheduling parameters can be generalized to accommodate more sophisticated workload characterization and complicated server environments.",
author = "Wubi Qin and Qian Wang",
year = "2005",
language = "English (US)",
volume = "7",
pages = "4760--4765",
journal = "Proceedings of the American Control Conference",
issn = "0743-1619",
publisher = "Institute of Electrical and Electronics Engineers Inc.",

}

Feedback performance control for computer systems : An LPV approach. / Qin, Wubi; Wang, Qian.

In: Proceedings of the American Control Conference, Vol. 7, FrC07.1, 2005, p. 4760-4765.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Feedback performance control for computer systems

T2 - An LPV approach

AU - Qin, Wubi

AU - Wang, Qian

PY - 2005

Y1 - 2005

N2 - There has been increasing research effort in applying control-theoretic approaches to performance management for computer systems such as web servers, database systems, and storage systems. Since today's Internet servers and applications are often operated under dynamically changing load conditions, linear control designs may not suffice to provide desired performance guarantees. This paper presents a Linear-Parameter-Varying (LPV) approach to the modeling and performance control of web servers in order to achieve performance-based Service Level Agreement (SLA). In particular, admission control for web servers is used as a case study. By applying system identification to empirical data, an LPV system is developed to approximate the dynamics of web server admission control from rejection ratio to response time, where the time-varying workload parameters are chosen as scheduling variables. An LPV robust control is then designed to meet response time SLA. The performance of the LPV control is compared with that of a linear design. By exploring the nature of dependence of server performance on time-varying load and operating conditions, the proposed general framework are applicable to a diverse spectrum of server-based applications. The utilization of scheduling parameters can be generalized to accommodate more sophisticated workload characterization and complicated server environments.

AB - There has been increasing research effort in applying control-theoretic approaches to performance management for computer systems such as web servers, database systems, and storage systems. Since today's Internet servers and applications are often operated under dynamically changing load conditions, linear control designs may not suffice to provide desired performance guarantees. This paper presents a Linear-Parameter-Varying (LPV) approach to the modeling and performance control of web servers in order to achieve performance-based Service Level Agreement (SLA). In particular, admission control for web servers is used as a case study. By applying system identification to empirical data, an LPV system is developed to approximate the dynamics of web server admission control from rejection ratio to response time, where the time-varying workload parameters are chosen as scheduling variables. An LPV robust control is then designed to meet response time SLA. The performance of the LPV control is compared with that of a linear design. By exploring the nature of dependence of server performance on time-varying load and operating conditions, the proposed general framework are applicable to a diverse spectrum of server-based applications. The utilization of scheduling parameters can be generalized to accommodate more sophisticated workload characterization and complicated server environments.

UR - http://www.scopus.com/inward/record.url?scp=23944442685&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=23944442685&partnerID=8YFLogxK

M3 - Article

VL - 7

SP - 4760

EP - 4765

JO - Proceedings of the American Control Conference

JF - Proceedings of the American Control Conference

SN - 0743-1619

M1 - FrC07.1

ER -