RHEL6 host / CentOS5.6 guest periodically very sluggish

2011-05-08 Thread T Johnson
Hello, I have a perplexing problem I'm hoping I might be able to get some help with. This is a RHEL6 kvm host, with 4 idle CentOS5.6 guests. 3 guests have 1 vpu, 1 guest has 4 vpu. Host is an 8 core/16 thread Nahalem class machine and is idle other than the KVM guests. Probably every 5-10

Re: limiting guest block i/o for qos

2010-11-29 Thread T Johnson
On Mon, Nov 29, 2010 at 4:58 AM, Stefan Hajnoczi stefa...@gmail.com wrote: On Mon, Nov 29, 2010 at 2:00 AM, T Johnson tjohnso...@gmail.com wrote: Hello, On Thu, Nov 25, 2010 at 3:33 AM, Nikola Ciprich extmaill...@linuxbox.cz wrote: Hello Thomas, I t hink blkio-cgroup really can't help You

Re: limiting guest block i/o for qos

2010-11-28 Thread T Johnson
On Thu, Nov 25, 2010 at 12:58:22AM -0500, T Johnson wrote: Hello, Does anyone know of any work in progress or any tricks to limit a guest's i/o requests to a specific throttled rate? I have guests that mount their filesystems via virtio, which are images served on an NFS server. Some

limiting guest block i/o for qos

2010-11-24 Thread T Johnson
Hello, Does anyone know of any work in progress or any tricks to limit a guest's i/o requests to a specific throttled rate? I have guests that mount their filesystems via virtio, which are images served on an NFS server. Some of these guests will flood the server with requests and can then choke