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Management costs in private clouds will be promisingly reduced by reviewing ‘operation history,’ which is defined as a holistic view of past operation executions. Operation history provides insights into breakdown of operations: the breakdown clarifies cost-dominant operations to be improved and repetitive ones to be automated. Towards obtaining the operation history, a conventional approach relying...
Integrated monitoring system, enabled with semi-structured datastore, is a promising solution for monitoring SaaS systems. However, according to increasing scale of SaaS systems and their long-term of service operations, the monitoring system has faced the problem in response times of log analysis and storage consumption. Our empirical observation is that the problem is primarily derived from the...
Quick provisioning of tenants in multi-tenancy data centers is one of major challenges. Provisioning is time-consuming and error-prone due to the need to configure network devices with hundreds of parameter values (e.g., VLAN ID, IP address) determined according to operational rules. Past works have developed systems to automate such provisioning operation, but a crucial problem stems from the high...
A recent fashion to reduce the device cost of datacenter networks is to leverage multi-tenancy, with which multiple virtual networks of different customers (tenants) are consolidated over a single physical infrastructure. The use of multi-tenancy, however, poses significant operational cost due to the complicated device configuration and the rise in risks of misconfigurations in such shared environment;...
<?Pub Dtl?>End-host profiling by analyzing network traffic comes out as a major stake in traffic engineering. Graphlet constitutes an efficient and common framework for interpreting host behaviors, which essentially consists of a visual representation as a graph. However, graphlet analyses face the issues of choosing between supervised and unsupervised approaches. The former can analyze a priori...
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