On Mon, Mar 12, 2012 at 9:12 AM, PANKAJ RAWAT <pankajr...@gmail.com> wrote: > Hi all i have a kvm machine and i use qed format as the disk image format > I want to improve the I/O performance of my machine > can anyone tell other then cluster_size and cache what are the tunining > parameters for qed so that i can improve the performance of my VM ?
Cluster and L1/L2 table size are the only QED-specific parameters. What to tune really depends on what bottleneck you are seeing. You need to do disk I/O benchmarks to find that out. If you are generally looking for good settings, I suggest leaving the QED parameters at their default and running with -drive if=virtio,cache=none,aio=native,file=path/to/image.qed with a recent QEMU and host kernel. Stefan
