virtual guests are competing for resources on the same physical hardware. Understanding performance of a virtualization layer … on comparing the performance of three hypervisors KVM, Xen, and Proxmox VE. The experiments showed that KVM delivers the … best performance on most of the selected parameters. Xen excels in file system performance and application performance …

The purpose of the article was to develop a methodology for evaluating performance of e-mail servers and to compare the … performance of e-mail servers based on free software (freeware and open source software) with the performance of payment licensed …-mail servers with payment license (Microsoft Exchange and Lotus Domino) were compared. For evaluating the performance (antispam …