Not logged in
Log in now
Create an account
Subscribe to LWN
LWN.net Weekly Edition for May 16, 2013
A look at the PyPy 2.0 release
PostgreSQL 9.3 beta: Federated databases and more
LWN.net Weekly Edition for May 9, 2013
(Nearly) full tickless operation in 3.10
Class-based Kernel Resource Management (CKRM) might also be a consolidation enabler. It might also be a little bit faster as it has more information to use then a virtual machine monitor will have.
Gerrit Huizenga at IBM has said "And yes, a hypervisor does have a lot more overhead in many forms.
Something like an overall 2-3% everywhere, where the CKRM impact is
likely to be so small as to be hard to measure in the individual
subsystems, and overall performance impact should be even smaller.
Plus you won't have to manage each operating system instance which
can grow into a pain under virtualization. But I still maintain that
both have their place."
Alan Cox has said "Its more expensive to do a lot of resource management at the VMM level because the virtualisation engine doesn't know anything but its getting indications someone wants to be bigger/smaller. ... Bingo - and areas the virtualiser can't see into, at least not unless it uses the same hooks CKRM uses."
So both virtualization and partitioning will be important.
Copyright © 2013, Eklektix, Inc.
Comments and public postings are copyrighted by their creators.
Linux is a registered trademark of Linus Torvalds