From: Michael Neumann <mneumann@...>
Date: 2004-11-24T09:53:44+09:00
Subject: [Ann] Checkpointing Ruby applications (DragonFlyBSD only)

Hi,

With DragonFlyBSD (www.dragonflybsd.org) it's now possible to checkpoint 
processes. That means, that you can store a dump of the running 
application to disk, from which you can resume later on (possibly on 
another machine). I mention this, because it's especially interesting 
for Web frameworks like Wee or Borges, which use Continuations and 
Threads, that are not marshallable (but checkpointable ;-).

I've made a Ruby module around the sys_checkpoint syscall. You can find 
the module here:

   http://www.ntecs.de/viewcvs/viewcvs/DragonFly/checkpoint/

Of course, you have to restore sockets, pipes etc. on resume yourself.

Regards,

   Michael