We use a combination of XEN and KVM for our webhosting/VPS. The great thing about Virtualization and Linux is the ability backup your virtual machines. If your running a somewhat homogenous setup failover and recovery is rather trivial. XEN running on the proper hardware suffers almost no performance penalty's at almost native speeds though this really depends on how many virtual machines you have running. We use "16 core" i7's which are really 8 when you break it down. I admin an apache SOLR server which relies heavily on java, i have this "pinned" to only utilize a set number of cores and it is serving tens of thousands of queries hourly without any performance impact on other virtual hosts. If there are no budget constraints i highly recommend the Xeon E-series and a dedicated hardware raid controller. We use a combination of platter based disks and SSD drives to get the best performance/reliability.
On Thu, Jul 5, 2012 at 10:19 AM, Sam Hooker <[email protected]> wrote: > Dave, > > I use Xen 3 to run, among other things, an instance of Zimbra within a > paravirtualized CentOS 5 guest. Zimbra relies heavily on Java and > moderately on MySQL, and performs acceptably (although it serves a very > small population). Sizing concerns aside, I didn't have to implement any > workarounds or special tunings to get it to work. > > > Cheers, > > -sth > > sam hooker|[email protected]|http://www.noiseplant.com > > "To invent, you need a good imagination and a pile of junk." > Thomas Edison > > ----- Original Message ----- > > From: "Dave Tisdell" <[email protected]> > > To: [email protected] > > Sent: Thursday, July 5, 2012 9:19:51 AM > > Subject: xen virtualization > > > > Hi, > > > > Are any of you using xen virtualization? I have a client that is > > starting to move some of his servers from OS X to Linux and we are > > considering virtualizing some of the services. He runs a web based > > data collections service for schools. The main thing running inside > > the virtual servers would be JAVA based web apps connecting to a > > MySQL > > database. Any performance issues with JAVA apps inside a xen based > > virtual server I should be aware of? > > Thanks. > > > > Dave > > > > -- > > > > > > This e-mail may contain information protected under the Family > > Educational > > Rights and Privacy Act (FERPA). If this e-mail contains student > > information > > and you are not entitled to access such information under FERPA, > > please > > notify the sender. Federal regulations require that you destroy this > > e-mail > > without reviewing it and you may not forward it to anyone. > > >
