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

Kjaer, Martin Ansbjerg LU ; Kihl, Maria LU and Robertsson, Anders LU (2009) In IEEE Transactions on Network and Service Management 6(4).
Abstract
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... (More)
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. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
IEEE Transactions on Network and Service Management
volume
6
issue
4
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • scopus:75149193398
ISSN
1932-4537
project
LCCC
Broadband Communications: Modelling and Control of Server Systems
language
English
LU publication?
yes
id
019bb0aa-1427-41fe-a297-2808196f99ef (old id 1516262)
date added to LUP
2009-12-22 13:07:35
date last changed
2017-08-20 03:49:46
@article{019bb0aa-1427-41fe-a297-2808196f99ef,
  abstract     = {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.},
  author       = {Kjaer, Martin Ansbjerg and Kihl, Maria and Robertsson, Anders},
  issn         = {1932-4537},
  language     = {eng},
  number       = {4},
  publisher    = {IEEE--Institute of Electrical and Electronics Engineers Inc.},
  series       = {IEEE Transactions on Network and Service Management},
  title        = {Resource allocation and disturbance rejection in web servers using SLAs and virtualized servers},
  volume       = {6},
  year         = {2009},
}