-----Original Message----- From: redhat-list-bounces@xxxxxxxxxx [mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of Jose R R Sent: Monday, May 18, 2009 11:03 AM To: General Red Hat Linux discussion list Subject: Re: Xen virtual machines and ntp On Mon, May 18, 2009 at 7:15 AM, mark <m.roth2006@xxxxxxx> wrote: > ESGLinux wrote: >> Hi all, >> >> Now that I could restart my mail server with a Xen kernel (uname -a: Linux >> mailserver 2.6.18-128.el5xen #1 SMP Wed Dec 17 12:01:40 EST 2008 x86_64 >> x86_64 x86_64 GNU/Linux) >> >> >> I suposse it`s not a goog idea to run a non-xen kernel on a Xen host, > <snip> > Really?! > > Ok, that's nothing I would have expected, from my limited experience with VMs. > VMware, you install the "guest" o/s in the VM, and it doesn't have to know > anything about the VM host. > > mark Xen guest paravirtualization, i.e., when the guest or DomU "knows" that it is being virtualized, provides the closest to native hardware performance. Accordingly, open --hence modifiable or capable of being "Xenizied"-- kernels like that of GNU/Linux are the ideal for the so-called cloud computing platform or delivery mechanism. The performance of Software as a Service (SaaS) applications, being served/delivered through the cloud platform, is dependent on the qualities of underlying infrastructure, of which virtualization plays a prominent role. Neither proprietary, closed source, technologies as those by VmWare or MS HyperV, can provide the level of flexibility and/or performance as that enabled by open source Xen technology. Additionally, interoperability and deployment of virtual machines hosting business applications among the different cloud computing providers, including those of private clouds, decreases significantly if closed source, self-serving proprietary virtualization enabler infrastructure technology prevail. -- Jose R R http://www.metztli-it.com --------------------------------------------------------------------------------------------- IBM Lotus Symphony supported on GNU/Linux, Mac OS, and Windows. --------------------------------------------------------------------------------------------- Daylight Saving Time in USA & Canada starts: Sunday 08 March 2009 --------------------------------------------------------------------------------------------- --------------------------------------------------- I thought you couldn't start the Xen services without running a Xen kernel... -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
