Re: Terrible disk/network performance with kvm

2011-08-16 Thread Orion Poplawski
On 08/15/2011 10:51 PM, Nico Kadel-Garcia wrote: On Mon, Aug 15, 2011 at 6:05 PM, Orion Poplawski wrote: I have a server that I recently migrated from CentOS 5.6 to SL6.1. The host install serves as a basic disk server and runs our nightly backups with amanda. We also have several virtual mac

Re: Terrible disk/network performance with kvm

2011-08-15 Thread Nico Kadel-Garcia
On Mon, Aug 15, 2011 at 6:05 PM, Orion Poplawski wrote: > I have a server that I recently migrated from CentOS 5.6 to SL6.1.  The host > install serves as a basic disk server and runs our nightly backups with > amanda.  We also have several virtual machines running on it, so of which > are mostly

Re: Terrible disk/network performance with kvm

2011-08-15 Thread Steven Haigh
On 16/08/2011 8:29 AM, Orion Poplawski wrote: I'm using LVM volumes for the disk images, stored on my 8 disk raid10 array. While this is not exactly related to KVM, the underlying principles will more than likely be the same for KVM... http://www.crc.id.au/xen-performance-guide/ The key is

Re: Terrible disk/network performance with kvm

2011-08-15 Thread Orion Poplawski
On 08/15/2011 04:15 PM, Morten Stevens wrote: The default settings are bad. Please tell us more about your settings. In the libvirtd qemu settings I'm using virtio for disk and net. Guests are Fedora 14+ and SL5/6 using virtio drivers. I'm using LVM volumes for the disk images, stored on m

Re: Terrible disk/network performance with kvm

2011-08-15 Thread Morten Stevens
On Mon, 15 Aug 2011 16:05:17 -0600, Orion Poplawski wrote: I have a server that I recently migrated from CentOS 5.6 to SL6.1. The host install serves as a basic disk server and runs our nightly backups with amanda. We also have several virtual machines running on it, so of which are mostly idl

Terrible disk/network performance with kvm

2011-08-15 Thread Orion Poplawski
I have a server that I recently migrated from CentOS 5.6 to SL6.1. The host install serves as a basic disk server and runs our nightly backups with amanda. We also have several virtual machines running on it, so of which are mostly idle and others which can be quite busy. Since making the mov