Matthew Miller (mattdm@xxxxxxxxxxxxxxxxx) said: > On Wed, May 15, 2013 at 11:18:04AM -0400, Matthew Miller wrote: > > > 2) I also commented out the "Zeroing out empty space" postinstall stuff, > > > because it drastically increases the image build time for not much benefit, > > > IMHO. > > One time image build cost vs. whatever benefit multipled by every time the > > image is used. :) > > To put some numbers behind it, the compressed qcow2 image with the dd to > zero empty space is 215M out of appliance-creator. Without it, it's 242M. > > If we use a smaller blocksize, or an incrementally shrinking one, we can > shrink it by another megabyte, at the cost of even more build time. I think > that's probably across the worth-it threshold, though. > > Using virt-sparsify seems to take even longer, but does get it down to 208M. > That requires libguestfs, which we can't do in the current build system, but > will be able to in the future one. (Feature rescheduled for F20.) Why not use fstrim on the image file? Bill _______________________________________________ cloud mailing list cloud@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/cloud
