On Thu, Sep 15, 2011 at 7:11 PM, Paolo Bonzini <pbonz...@redhat.com> wrote: ... > Perhaps Ronnie has rough performance numbers comparing in-kernel iSCSI with > libiscsi?
I did some tests some time ago just doing things like 'dd if=/dev/sda of=/dev/null' on the root disk from within a RHEL guest itself and performace was comparable. In some tests libiscsi was a few percent faster, in other tests it was a few percent slower. But overall, very unscientifically performed test, performance was not much different. Now, I am not an expert on tuning cache or tuning the kernel scsi and iscsi layer, so I would not really want to make too many statements in the area other than in some tests I performed, performance was good enough for my use. I would be very happy if someone competent in tuning qemu/scsi/open-iscsi (==that means, not me) would do a real comparasion. regards ronnie sahlberg
