I have two questions: 1. On the OSS/OST side, can one run Lustre as a server on a system running a Xen kernel? 2. Conversely: is the lustre client compatible with Xen kernel machines? Thanks much, Dan -- Dan Ferber, Daniel.Ferber at Sun.com +1 612-486-5167 (Office) +1 651-356-9481 (Cell x29704 (Sun Internal) -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.lustre.org/pipermail/lustre-discuss/attachments/20081004/a97ef0cd/attachment.html
On Oct 4, 2008, at 08:33 , Daniel Ferber wrote:> > I have two questions: > > 1. On the OSS/OST side, can one run Lustre as a server on a system > running a Xen kernel? > > 2. Conversely: is the lustre client compatible with Xen kernel > machines?The answer to both questions is yes - I routinely test Lustre servers and clients on Xen using a RHEL 5 kernel with our patches and configured as a Xen guest. I have not tried a patchless client on a RHEL 5 Xen kernel yet, but I would expect that to work if you built our modules for it. robert> > > Thanks much, > Dan > > > -- > Dan Ferber, Daniel.Ferber at Sun.com > +1 612-486-5167 (Office) > +1 651-356-9481 (Cell > x29704 (Sun Internal) > > > _______________________________________________ > Lustre-discuss mailing list > Lustre-discuss at lists.lustre.org > http://lists.lustre.org/mailman/listinfo/lustre-discuss-------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.lustre.org/pipermail/lustre-discuss/attachments/20081006/5c0a1d50/attachment.html
On Oct 04, 2008 10:33 -0500, Daniel Ferber wrote:> I have two questions: > > 1. On the OSS/OST side, can one run Lustre as a server on a system running a > Xen kernel? > > 2. Conversely: is the lustre client compatible with Xen kernel machines?Note that "work" and "perform well" are two completely different issues. While CPU virtualization is quite efficient these days, IO virtualization is not necessarily very fast at all. Cheers, Andreas -- Andreas Dilger Sr. Staff Engineer, Lustre Group Sun Microsystems of Canada, Inc.
On Oct 6, 2008, at 16:03 , Andreas Dilger wrote:> On Oct 04, 2008 10:33 -0500, Daniel Ferber wrote: >> I have two questions: >> >> 1. On the OSS/OST side, can one run Lustre as a server on a system >> running a >> Xen kernel? >> >> 2. Conversely: is the lustre client compatible with Xen kernel >> machines? > > Note that "work" and "perform well" are two completely different > issues. > While CPU virtualization is quite efficient these days, IO > virtualization > is not necessarily very fast at all. > >I haven''t benchmarked IO on Xen in a long time, but I''d expect a pretty reasonable percentage of native IO at this point. Not quite as efficient as cpu virtualization, of course, but I wouldn''t necessarily say not very fast either. robert