Speaker
Mr
Francesco Maria Taurino
(CNR/INFM - INFN - Dip. di Fisica Univ. di Napoli "Federico II")
Description
Virtualization is a methodology of dividing the resources of a computer into multiple
execution environments, by applying one or more concepts or technologies such as
hardware and software partitioning, time-sharing, partial or complete machine
simulation, emulation, quality of service, and many others. These techniques can be
used to consolidate the workloads of several under-utilized server to fewer machines,
to run legacy applications which might simply not run on newer hardware, to provide
secure and isolated sandboxes for running untrusted or potentially insecure
applications, to provide powerful debugging environments and test scenarios.
Xen is an hypervisor which runs multiple guest operating systems with kernels ported
to a special arch very close to normal x86, with strong isolation between virtual
machines and execution performance close to native processors. OpenVirtuozzo is an
operating system-level virtualization solution based on Linux. Any OpenVZ virtual
server behaves like a regular Linux system, isolated from each other (file system,
processes, IPC), but shares a single OS image ensuring that applications do not
conflict.
In this paper we describe our experience and test results with these powerful tools,
used in our IT infrastructure to provide a wide set of core services, like dns, mail,
network printing and client deployment.
Author
Mr
Francesco Maria Taurino
(CNR/INFM - INFN - Dip. di Fisica Univ. di Napoli "Federico II")
Co-author
Mr
Gennaro Tortone
(INFN Napoli)
