[Vm-dev] Cog in the cloud

Edgar De Cleene edgardec2005 at gmail.com
Sat Dec 20 08:54:14 UTC 2014

Thanks for share.
I away of Pharo world so don’t know about Pharo NOS.
This days i playing with a Cuis fork under 900 classes and under 4 Mb.
What you could do wit it?
See the system running in www.squeakros.org
user: visita
pass: (blank here)
It’s a combination of swiki/blog and exploration of how to build web 2.0 apps without Node, npm, Bower, Grunt ,nothing.
Only HTML5, CSS, JavaScript powered by my Cuis fork.
I want to have a NOS version of it, wish work together exchanging feedback ?

Edgar De Cleene
@morplenauta en twitter
Sent with Sparrow (http://www.sparrowmailapp.com/?sig)

On Saturday, December 20, 2014 at 1:08 AM, Ben Coman wrote:

> Just some thoughts that arose as I skipped along the web...
> With the idea of using Pharo in the cloud, I was thinking of how  
> PharoNOS[1] is basing off top of the Linux kernel, but the examples  
> indicate its operating in User Mode. So I was wondering about  
> performance being greater[2] if the CogVM ran in Kernel Mode. However  
> maybe this could get tangled in the GPL license of the kernel.
> Now I believe FreeBSD/NetBSD license is compatible with COG's MIT  
> license, so that seems a better option for eliminating layers of the  
> operating system. They both[3][4] have pre-built Amazon Machine Images  
> to run on EC2, as well as instructions[5] to build your own AMI. So  
> potentially we could build an AMI with the CogVM linked to the  
> FreeBSDKernel operating in Kernel Mode, with no User Mode. The lack of  
> direct access to memory from the Image, and probably single application  
> focus should be sufficient security to forgo User Mode, and run faster.
> But we could go a step further. Runing in the cloud relies heavily on  
> virtualisation, and for performance[6], most likely on the OS's  
> paravirtualisation interface - to Xen for example. So from Cog, why not  
> interface direct to the Xen FrontEndDriver[7] and eliminate the DomU  
> operating system all together. What I understand from [6] is that Xen's  
> paravirtualisation hooks makes it much easier to boot, than booting on  
> the bare metal of a fully-virtualised system. So the former seems more  
> achievable than the latter (which was the only option in years past),  
> and also be more portable as technology evolves, to any platform Xen  
> runs on.
> Squeak/Pharo on Cog-Xen could be a good choice for a Cloud Operating  
> System[8]. Maybe a good student research project?
> cheers -ben
> [1] http://pillarhub.pharocloud.com/hub/mikefilonov/pharonos
> [2] http://blog.codinghorror.com/understanding-user-and-kernel-mode/
> [3] http://www.daemonology.net/freebsd-on-ec2/
> [4] http://wiki.netbsd.org/amazon_ec2/amis/
> [5] http://wiki.netbsd.org/amazon_ec2/build_your_own_ami/
> [6] http://wiki.xen.org/wiki/Virtualization_Spectrum
> [7] http://wiki.xen.org/wiki/FrontendDriver
> [8] http://wiki.xen.org/wiki/Cloud_Operating_Systems

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