I set up DSS V6 on a virtual machine on a test Hyper-V serving ISCSI Volumes to VMs. I still get significant slowdowns during high IO. I have tweaked the ISCSI settings as given. Microsoft says SQL server can work with ISCSI. Is this likely just a configuration problem with DSS?
I've dedicated an SSD to SQL on a Virtual 10GB network, block IO, and pass-through disk. I just don't see how this does not perform better. I am seeing average IO queue length of > 300 when running sqliosim. All the problems go away if I set the SQL server to use a dynamic VHD on a local 5900 RPM Advanced Fromat drive.