On Mon, Apr 17, 2017 at 12:00 PM, 858585 jemmy <jemmy858...@gmail.com> wrote: > On Mon, Apr 17, 2017 at 11:49 AM, Fam Zheng <f...@redhat.com> wrote: >> On Fri, 04/14 14:30, 858585 jemmy wrote: >>> Do you know some other format which have very small cluster size? >> >> 64k is the default cluster size for qcow2 but it can be configured at image >> creation time, as 512 bytes, for example: >> >> $ qemu-img create -f qcow2 test.qcow2 -o cluster_size=512 1G > > Thanks, i will test the performance again.
I find the performance reduce when cluster size is 512. I will optimize the performance and submit a patch later. Thanks. >> >> Fam
