Andrew Olney wrote: > I've been migrating from Xen to KVM for a wide variety of reasons. > > I've noticed, however, that XP installs much much faster with Xen (3.03 > xen-image-xen0-2.6.17-6-generic-xen0 ubuntu) than with KVM (14). > > I haven't clocked it, but for KVM it takes longer than realtime (by the > XP install clock) and with Xen it takes less than realtime. > > I assume that this is all file I/O related, which raises the question: > what file system setup optimizes KVM I/O, e.g. qcow vs. raw? >
The best file format is not a file, but a raw partition or lvm volume. Second best is a raw partition that has been prewritten using dd. Pinning kvm to a cpu may help; try prefixing the command with 'taskset 1'. Please report you experiences, especially about the last hack, as it indicate a serious problem. -- Do not meddle in the internals of kernels, for they are subtle and quick to panic. ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ kvm-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/kvm-devel
