StackAct: Performance Evaluation in an IaaS Cloud Multilayer.

Cloud Computing has become synonymous of quality, efficiency, and return of investment in Information Technology, creating new challenges for processing and data integrations. This paper presents the StackAct, a mechanism that allows performing monitoring and obtaining data on the consumption of computing resources of a solution in three layers using orchestrator IaaS Apache CloudStack, XenServer hypervisor and data storage on the NAS OpenFiler system. Performance tests were conducted using three different instances profile in a private cloud computing, allowing measuring CPU consumption, I/O disk and memory in three layers with different service offerings. The tests resulted in a comparison between the layers, it is possible to note the high consumption of disk in the data storage layer, in particular I/O data recording and the high memory consumption on the hypervisor layer, which is justified by the hypervisor itself to allocation of VMs being created and used in the process.