[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: lost data?

On Thu, 10 May 2001, Jaco van Gorkom wrote:

> George N. White III wrote in message ...
> ...
> >Some OS's (SGI Irix) have a checkpoint facility that works at the level of
> >processes, and doesn't require support built in to the application.  I
> >know there has been some work on checkpointing for linux, as the same
> >capability is required to migrate a process to a new node in some
> >distributed processing systems. I don't know if there is anything you can
> >use with IDL, but it is certainly worth a look.
> ...
> One question here, just for my understanding:
> what kind of thing is checkpointing?
>   Jaco

Checkpointing saves an "image" of a running program in such a way
that you can restart the program at that point in the event of a
crash.  For Linux, see:


You can write applications that save their state, but if you have
OS-level support you can checkpoint applications.  Checkpointing
does impose some constraints on the application, and you may need
lots of disk space to hold the checkpoint files.

George N. White III <gnw3@acm.org> Bedford Institute of Oceanography