Messages in this thread | | | Date | Wed, 1 Oct 1997 16:11:33 -0600 | From | Victor Yodaiken <> | Subject | Re: Process Migration on Linux - Impossible? |
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On Wed, Oct 01, 1997 at 11:05:01AM -0500, Tall cool one wrote: > Victor Yodaiken <yodaiken@chelm.cs.nmt.edu> writes: > > On Tue, Sep 30, 1997 at 10:06:25PM -0500, Tall cool one wrote: > > > Personally, I don't have a real need for process migration, but I'd like > > > to see it because of what process migration would allow. The ability of > > > > So you want fault tolerance, not process migration. Don't confuse the > > technique with the result. > > That's an odd thing to say, isn't it? Re-read my first sentence again, > carefully this time. If one can throw a process on another machine at will, > it becomes trivial to checkpoint, yes? Fault tolerance for free.
No. And in any case, its almost always a mistake to argue that Y is desirable, X makes Y possible, so X is desirable. Having process migration leaves you a long way from having fault tolerance. More importantly, if I wanted to add fault-tolerance to Linux I would certainly not start by implementing process migration.
> I'm the first to admit, that the above things are not really that > important to me, just neat and potentially useful. The process migration > thread just made me think about them and suggest potential other (simular) > uses for it.
I think fault tolerance is a wonderful thing. But process migration seems to me to be like virtual memory file systems, a clever idea with no clear applications.
--------------------------------- Victor Yodaiken Department of Computer Science New Mexico Institute of Mining and Technology Socorro NM 87801 Homepage http://www.cs.nmt.edu/~yodaiken PowerPC Linux page http://www.cs.nmt.edu/~linuxppc Real-Time Page http://luz.cs.nmt.edu/~rtlinux
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