Re: A possible idea for Linux: Save running programs to disk

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From: Michael Concannon <[email protected]>
To: Arjan van de Ven <[email protected]>
CC: lokum spand <[email protected]>, [email protected]
Subject: Re: A possible idea for Linux: Save running programs to disk
Date: Sat, 01 Oct 2005 18:21:37 -0400

Arjan van de Ven wrote:

On Sat, 2005-10-01 at 13:30 -0800, lokum spand wrote:


I allow myself to suggest the following, although not sure if I post in
the right group:

Suppose Linux could save the total state of a program to disk, for
instance, imagine a program like mozilla with many open windows. I give
it a SIGNAL-SAVETODISK and the process memory image is dropped to a
file. I can then turn off the computer and later continue using the
program where I left it, by loading it back into memory.

Would that be possible? At least a program can be given a ctrl-z and is



there is a LOT of state though.. the moment you add networking in the
picture the amount of state just isn't funny anymore. Your X example is
a good one as well...


There are a few cluster/parallel computing libraries out there that are starting to allow "process migration"...

One would assume that "saving it to a disk" is simply a degenerate case of migrating the process...

Presuming they have process migration working (and it seemed close a while ago when I last looked), saving to a file might already be supported... I'd google "process migration" and you are likely to find a lot of discussion on this topic...

/mike

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In fact moving processes from one machine to another would be a brilliant feature at my work, since we run fairly large and time-consuming simulations on electronic circuits. If the kernel could natively support bouncing jobs back and forth, that would really be something. Since we simulate with proprietary software, I suppose we can't rely on the simulator being rewritten to support such special libraries.

Does any other Unix variant have process bouncing already?

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