Czekster, R.M., Fernandes, P., Sales, A., Webber, T. and Zorzo, A.F. (2011). Stochastic Model for QoS Assessment in Multi-tier Web Services. Electronic Notes in Theoretical Computer Science, 275 , pp. 53-72.
Abstract
Service Level Agreements (SLAs) are used to guarantee quality of service (QoS) between customers and service providers. In an SLA, parties establish a common set of rules and responsibilities. In this paper we propose a practical stochastic modeling of a multi-tier architecture considering SLAs for specific transactions. The model is parameterized with available performance testing data for a real web service, and with a testing environment having unpredictable and unknown external workloads of simultaneous execution. In addition, we present multiple scenarios of external applications impacting on the SLAs in our target architecture. Having a previous knowledge about the average time demanded by some external applications, our model results can provide evidences when the system under test will not respect the agreed-upon SLAs. Finally, we discuss possible model extensions towards further unknown workload characterizations and considerations about application execution profiling.
Publication DOI: | https://doi.org/10.1016/j.entcs.2011.09.005 |
---|---|
Additional Information: | © 2011 Elsevier B.V. Open access under CC BY-NC-ND license. |
Publication ISSN: | 1571-0661 |
Last Modified: | 30 Sep 2024 12:56 |
Date Deposited: | 07 Jan 2022 13:35 |
Full Text Link: |
http://www.scop ... tnerID=MN8TOARS |
Related URLs: |
https://www.sci ... 096X?via%3Dihub
(Publisher URL) |
PURE Output Type: | Article |
Published Date: | 2011-09-27 |
Authors: |
Czekster, R.M.
(
0000-0002-6636-4398)
Fernandes, P. Sales, A. Webber, T. Zorzo, A.F. |
Download
Version: Published Version
License: Creative Commons Attribution Non-commercial No Derivatives
| Preview