From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexey Dobriyan Subject: Re: How much of a mess does OpenVZ make? ;) Was: What can OpenVZ do? Date: Sat, 14 Mar 2009 03:20:59 +0300 Message-ID: <20090314002059.GA4167@x200.localdomain> References: <20090310215305.GA2078@x200.localdomain> <49B775B4.1040800@free.fr> <20090312145311.GC12390@us.ibm.com> <1236891719.32630.14.camel@bahia> <20090312212124.GA25019@us.ibm.com> <604427e00903122129y37ad791aq5fe7ef2552415da9@mail.gmail.com> <20090313053458.GA28833@us.ibm.com> <20090313193500.GA2285@x200.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: Sender: linux-api-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Linus Torvalds Cc: Sukadev Bhattiprolu , Ying Han , "Serge E. Hallyn" , linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Dave Hansen , linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org, viro-RmSDqhL/yNMiFSDQTTA3OLVCufUGDwFn@public.gmane.org, mingo-X9Un+BFzKDI@public.gmane.org, mpm-VDJrAJ4Gl5ZBDgjK7y7TUQ@public.gmane.org, Andrew Morton , xemul-GEFAQzZX7r8dnm+yROfE0A@public.gmane.org, tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org List-Id: linux-api@vger.kernel.org On Fri, Mar 13, 2009 at 02:01:50PM -0700, Linus Torvalds wrote: > > > On Fri, 13 Mar 2009, Alexey Dobriyan wrote: > > > > > > Let's face it, we're not going to _ever_ checkpoint any kind of general > > > case process. Just TCP makes that fundamentally impossible in the general > > > case, and there are lots and lots of other cases too (just something as > > > totally _trivial_ as all the files in the filesystem that don't get rolled > > > back). > > > > What do you mean here? Unlinked files? > > Or modified files, or anything else. "External state" is a pretty damn > wide net. It's not just TCP sequence numbers and another machine. I think (I think) you're seriously underestimating what's doable with kernel C/R and what's already done. I was told (haven't seen it myself) that Oracle installations and Counter Strike servers were moved between boxes just fine. They were run in specially prepared environment of course, but still. -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html