TY - GEN
T1 - Effects of dynamic cloud cluster load on differentiated service availability
AU - Chilwan, Ameen
AU - Undheim, Astrid
AU - Heegaard, Poul E.
PY - 2012
Y1 - 2012
N2 - Accredited to the diverse nature of cloud services, there is a need for cloud providers to offer differentiated availability for different service types in their SLAs. This can be achieved by using different redundancy strategies and fault-tolerance techniques. The availability resulting from these techniques is highly dependent upon the load on cloud datacenters and their clusters. This load is dynamic, caused by both variations in demand and failures in servers, network, and other cloud infrastructure. In this paper, the effect of dynamic load in a cloud cluster on the service availability is studied, using analytical models and simulations. The results are thus obtained for different loads and compared among different service classes. The analytical models are not able to grasp the interaction between different classes, and hence a simulation is performed. The results show that the cluster load has a quantifiable effect on service availability, and it increases with decreasing level of priority assigned to a service class.
AB - Accredited to the diverse nature of cloud services, there is a need for cloud providers to offer differentiated availability for different service types in their SLAs. This can be achieved by using different redundancy strategies and fault-tolerance techniques. The availability resulting from these techniques is highly dependent upon the load on cloud datacenters and their clusters. This load is dynamic, caused by both variations in demand and failures in servers, network, and other cloud infrastructure. In this paper, the effect of dynamic load in a cloud cluster on the service availability is studied, using analytical models and simulations. The results are thus obtained for different loads and compared among different service classes. The analytical models are not able to grasp the interaction between different classes, and hence a simulation is performed. The results show that the cluster load has a quantifiable effect on service availability, and it increases with decreasing level of priority assigned to a service class.
KW - Availability
KW - cloud
KW - differentiation
UR - http://www.scopus.com/inward/record.url?scp=84867796524&partnerID=8YFLogxK
U2 - 10.1109/ICCCN.2012.6289310
DO - 10.1109/ICCCN.2012.6289310
M3 - Conference contribution
AN - SCOPUS:84867796524
SN - 9781467315449
T3 - 2012 21st International Conference on Computer Communications and Networks, ICCCN 2012 - Proceedings
BT - 2012 21st International Conference on Computer Communications and Networks, ICCCN 2012 - Proceedings
T2 - 2012 21st International Conference on Computer Communications and Networks, ICCCN 2012
Y2 - 30 July 2012 through 2 August 2012
ER -