Re: Switching Kernels without Rebooting?

Wilfried Weissmann
2001-07-12T20:45:52Z

Torrey Hoffman wrote:
>
> Jesse Pollard wrote:
>
> [why switching kernels is very hard, and...]
>
> > Before you even try switching kernels, first implement a process
> > checkpoint/restart. The process must be resumed after a boot
> > using the same
> > kernel, with all I/O resumed. Now get it accepted into the kernel.
>
> Hear, hear! That would be a useful feature, maybe not network servers,
> but for pure number crunching apps it would save people having to write
> all the state saving and recovery that is needed now for long term
> computations.

There is a checkpointing and resumeing lib at
ftp://gutemine.geo.uni-koeln.de/pub/chkpt/
I am not sure if it has been ported to linux yet, but it might be worth
a look.

>
> For bonus points, make it work for clusters to synchronously save and
> restore state for the apps running on all the nodes at once...
>
> Torrey

bye,
Wilfried