Date: Wed, 12 Jan 2005 13:40:02 -0800 From: Brooks Davis <brooks@one-eyed-alien.net> To: Siddharth Aggarwal <saggarwa@cs.utah.edu> Cc: freebsd-hackers@freebsd.org Subject: Re: process checkpoint restore facility now in DragonFly BSD Message-ID: <20050112214002.GA21038@odin.ac.hmc.edu> In-Reply-To: <Pine.GSO.4.50L0.0501121412570.2985-100000@faith.cs.utah.edu> References: <Pine.GSO.4.50L0.0501121412570.2985-100000@faith.cs.utah.edu>
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[-- Attachment #1 --] On Wed, Jan 12, 2005 at 02:17:38PM -0700, Siddharth Aggarwal wrote: > > I am responding to a post back in Oct 2003 when the checkpointing feature > was announced for DragonFly. I have been doing some research on this, and > have seen some projects that use Xen VMM to achieve checkpoints of guest > OSes. > > So I was looking for inputs from people as to what everyone feels about > checkpointing, whether it should be done at the physical machine level or > VM level. Pros and Cons of each approach, if any further development was > done on DragonFly for checkpoint since then and if it was stopped, why? > Are there serious limitations to checkpointing a physical machine? > > Sorry for such a vague posting, but I thought this would be a good > platform to get some feedback. The DragonFly lists would be the logical place to discuss DragonFly features. From my perspective as a scientific computing user, VM level checkpointing is it little use since I get the overhead of the VM and I can't easily do the application level checkpointing required to checkpoing distributed programs. There are probably a number of places where it is useful in scientific computing, but I don't find it to be all that intresting. -- Brooks -- Any statement of the form "X is the one, true Y" is FALSE. PGP fingerprint 655D 519C 26A7 82E7 2529 9BF0 5D8E 8BE9 F238 1AD4 [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) iD8DBQFB5ZkpXY6L6fI4GtQRAlG9AJwKKz6OGw5jC8VzAZ1165T2BTbFXQCZAemr F540VRaEwrmV84qWnDAHlsA= =vSbz -----END PGP SIGNATURE-----
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