Re: Awful FreeBSD 9 block IO performance in KVM

2012-07-20 Thread Ivan Voras
On 19/07/2012 20:27, Richard Yao wrote: > Dear Everyone, > > FreeBSD 9 has awful block IO performance in KVM. I have experienced it > and others have experienced it. Someone posted slides to slideshare with > benchmarks documenting it: > > http://www.slideshare.net/TakeshiHasegawa1/runningfreebsd

Re: Awful FreeBSD 9 block IO performance in KVM

2012-07-20 Thread Adrian Chadd
On 19 July 2012 11:27, Richard Yao wrote: > Dear Everyone, > > FreeBSD 9 has awful block IO performance in KVM. I have experienced it > and others have experienced it. Someone posted slides to slideshare with > benchmarks documenting it: > > http://www.slideshare.net/TakeshiHasegawa1/runningfreebs

Re: Awful FreeBSD 9 block IO performance in KVM

2012-07-20 Thread Richard Yao
On 07/20/2012 03:44 PM, Adrian Chadd wrote: > On 19 July 2012 11:27, Richard Yao wrote: >> Dear Everyone, >> >> FreeBSD 9 has awful block IO performance in KVM. I have experienced it >> and others have experienced it. Someone posted slides to slideshare with >> benchmarks documenting it: >> >> htt

Re: Awful FreeBSD 9 block IO performance in KVM

2012-07-20 Thread Adrian Chadd
On 20 July 2012 15:26, Richard Yao wrote: > I am in the process of setting up a VM instance specifically for this. > While installing it, I noticed that qemu-kvm printed 'lsi_scsi: error: > ORDERED queue not implemented', which might be a clue as to why the > block device performance is bad. > >

Re: Awful FreeBSD 9 block IO performance in KVM

2012-07-20 Thread Richard Yao
On 07/20/2012 06:26 PM, Richard Yao wrote: > On 07/20/2012 03:44 PM, Adrian Chadd wrote: >> On 19 July 2012 11:27, Richard Yao wrote: >>> Dear Everyone, >>> >>> FreeBSD 9 has awful block IO performance in KVM. I have experienced it >>> and others have experienced it. Someone posted slides to slide