Meny

Du är här

Resource allocation and disturbance rejection in web servers using SLAs and virtualized servers

Författare:
Publiceringsår: 2009
Språk: Engelska
Publikation/Tidskrift/Serie: IEEE Transactions on Network and Service Management
Volym: 6
Nummer: 4
Dokumenttyp: Artikel
Förlag: IEEE

Sammanfattning

Abstract—Resource management in IT–enterprises gain more and more attention due to high operation costs. For instance, web sites are subject to very changing traffic–loads over the year, over the day, or even over the minute. Online adaption to the changing environment is one way to reduce losses in the operation. Control systems based on feedback provide methods for such adaption, but is in nature slow, since changes in the environment has to propagate through the system before being compensated. Therefore, feed–forward systems can be introduced that has shown to improve the transient performance. However, earlier proposed feed–forward systems have been based on offline estimation. In this article we show that off–line estimations can be problematic in online applications. Therefore, we propose a method where parameters are estimated online, and thus also adapts to the changing environment. We compare our solution to two other control strategies proposed in the literature, which are based on off-line estimation of certain parameters. We evaluate the controllers with both discrete-event simulations and experiments in our testbed. The investigations show the strength of our proposed control system.

Disputation

Nyckelord

  • Technology and Engineering

Övriga

  • Vetenskapsrådet
  • Vinnova: VINNMER
Published
  • LCCC
  • Broadband Communications: Modelling and Control of Server Systems
Yes
  • Broadband Communication
  • LCCC
  • ISSN: 1932-4537

Box 117, 221 00 LUND
Telefon 046-222 00 00 (växel)
Telefax 046-222 47 20
lu [at] lu [dot] se

Fakturaadress: Box 188, 221 00 LUND
Organisationsnummer: 202100-3211
Om webbplatsen