TY - GEN
T1 - Links as a Service (LaaS)
T2 - 12th ACM/IEEE Symposium on Architectures for Networking and Communications Systems, ANCS 2016
AU - Zahavi, Eitan
AU - Shpiner, Alexander
AU - Rottenstreich, Ori
AU - KOLODNY, AVINOAM
AU - Keslassy, Isaac
N1 - Publisher Copyright:
© 2016 ACM.
PY - 2016/3/17
Y1 - 2016/3/17
N2 - The most demanding tenants of shared clouds require complete isolation from their neighbors, in order to guarantee that their application performance is not affected by other tenants. Unfortunately, while shared clouds can offer an option whereby tenants obtain dedicated servers, they do not offer any network provisioning service, which would shield these tenants from network interference. In this paper, we introduce Links as a Service (LaaS), a new abstraction for cloud service that provides isolation of network links. Each tenant gets an exclusive set of links forming a virtual fat-tree, and is guaranteed to receive the exact same bandwidth and delay as if it were alone in the shared cloud. Consequently, each tenant can use the forwarding method that best fits its application. Under simple assumptions, we derive theoretical conditions for enabling LaaS without capacity over-provisioning in fat-trees. New tenants are only admitted in the network when they can be allocated hosts and links that maintain these conditions. LaaS is implementable with common network gear, tested to scale to large networks and provides full tenant isolation at the worst cost of a 10% reduction in the cloud utilization.
AB - The most demanding tenants of shared clouds require complete isolation from their neighbors, in order to guarantee that their application performance is not affected by other tenants. Unfortunately, while shared clouds can offer an option whereby tenants obtain dedicated servers, they do not offer any network provisioning service, which would shield these tenants from network interference. In this paper, we introduce Links as a Service (LaaS), a new abstraction for cloud service that provides isolation of network links. Each tenant gets an exclusive set of links forming a virtual fat-tree, and is guaranteed to receive the exact same bandwidth and delay as if it were alone in the shared cloud. Consequently, each tenant can use the forwarding method that best fits its application. Under simple assumptions, we derive theoretical conditions for enabling LaaS without capacity over-provisioning in fat-trees. New tenants are only admitted in the network when they can be allocated hosts and links that maintain these conditions. LaaS is implementable with common network gear, tested to scale to large networks and provides full tenant isolation at the worst cost of a 10% reduction in the cloud utilization.
KW - Data centers
KW - High performance computing
KW - Tenant isolation
UR - http://www.scopus.com/inward/record.url?scp=84971402209&partnerID=8YFLogxK
U2 - 10.1145/2881025.2881028
DO - 10.1145/2881025.2881028
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AN - SCOPUS:84971402209
T3 - ANCS 2016 - Proceedings of the 2016 Symposium on Architectures for Networking and Communications Systems
SP - 87
EP - 98
BT - ANCS 2016 - Proceedings of the 2016 Symposium on Architectures for Networking and Communications Systems
Y2 - 17 March 2016 through 18 March 2016
ER -