Thanks for the reply . we can change the cluster_size by *qemu-img* command but how can we change* L1/L2 table size *?
On Mon, Mar 12, 2012 at 3:17 PM, Stefan Hajnoczi <stefa...@gmail.com> wrote: > 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 > -- *Pankaj Rawat*
