TY - GEN
T1 - Modelling and analyzing the authorization and execution of video workflows
AU - He, Ligang
AU - Huang, Chenlin
AU - Li, Kenli
AU - Chen, Hao
AU - Sun, Jianhua
AU - Gao, Bo
AU - Duan, Kewei
AU - Jarvis, Stephen A.
PY - 2011
Y1 - 2011
N2 - It is becoming common practice to migrate signal-based video workflows to IT-based Video workflows. Video workflows have some inherent features, including: 1) necessary human involvements in video workflows introduce security and authorization concerns; 2) the frequent change of video workflow contexts requires a flexible approach to acquiring performance data; 3) the content-centric nature of video workflows, which is in contrast to the business-centric of business workflows, requires the support of scheduled activities. This paper takes the above issues into account, proposing a novel mechanism for modeling video workflow executions in cluster-based resource pools under Role-Based Authorization Control (RBAC) schemes. The Color Timed Petri-Net (CTPN) formalism is applied to construct the models. Various types of authorization constraint are modeled in this paper, and scheduled activities are also supported in the model. There is a clear interface between workflow execution and workflow authorization modules. The constructed models are then simulated and analyzed to obtain performance data, including authorization overhead, system- and application-oriented performance. Based on the model analysis, this paper further proposes the methods to improve performance in the presence of authorization policies. This work can be used to plan system capacity subject to the authorization control, and can also be used to tune performance by changing the scheduling strategy and resource capacity when it is not possible to adjust the authorization policies.
AB - It is becoming common practice to migrate signal-based video workflows to IT-based Video workflows. Video workflows have some inherent features, including: 1) necessary human involvements in video workflows introduce security and authorization concerns; 2) the frequent change of video workflow contexts requires a flexible approach to acquiring performance data; 3) the content-centric nature of video workflows, which is in contrast to the business-centric of business workflows, requires the support of scheduled activities. This paper takes the above issues into account, proposing a novel mechanism for modeling video workflow executions in cluster-based resource pools under Role-Based Authorization Control (RBAC) schemes. The Color Timed Petri-Net (CTPN) formalism is applied to construct the models. Various types of authorization constraint are modeled in this paper, and scheduled activities are also supported in the model. There is a clear interface between workflow execution and workflow authorization modules. The constructed models are then simulated and analyzed to obtain performance data, including authorization overhead, system- and application-oriented performance. Based on the model analysis, this paper further proposes the methods to improve performance in the presence of authorization policies. This work can be used to plan system capacity subject to the authorization control, and can also be used to tune performance by changing the scheduling strategy and resource capacity when it is not possible to adjust the authorization policies.
KW - Authorization
KW - Modeling
KW - RBAC
KW - Workflow
UR - http://www.scopus.com/inward/record.url?scp=84863237608&partnerID=8YFLogxK
U2 - 10.1109/HiPC.2011.6152727
DO - 10.1109/HiPC.2011.6152727
M3 - Conference contribution
AN - SCOPUS:84863237608
SN - 9781457719516
T3 - 18th International Conference on High Performance Computing, HiPC 2011
BT - 18th International Conference on High Performance Computing, HiPC 2011
T2 - 18th International Conference on High Performance Computing, HiPC 2011
Y2 - 18 December 2011 through 21 December 2011
ER -