kernel level virtualisation requirements.

[Nikolay Pavlov]

On Friday 12 October 2007 22:54:04 James Gritton wrote:
> Julian Elischer wrote:
>  > What I'd like to see is a bit of a 'a-la-carte' virtualisation
>  > ability.
>
> ...
>
>  > My question to you, the reader, is:
>  > what aspects of virtualisation (the appearance of multiple instances
>  > of some resource) would you like to see in the system?
>
> Of course everything jail has now, and all the network bits that vimage
> offers.
>
> CPU scheduling, in particular schedule the CPU first by jail, and then
> by processes within jail.

This is absolutely "MUST HAVE" feature i think.

>
> Filesystem quotas, without the need for each jail to have its own mount
> point.

Strange, but IMHO it would be better slightly revert this statement:
Filesystem quotas _with_ the need for each jail to have it's own mount 
point, but with out the need to maintain them in fstab (Like it is in 
ZFS). Because you gain the ability to maintain jails in a filesystem 
level(snapshots, cloning, dump, restore and so on).

>
> A lot of things that fall under the IPC category: UNIX domain sockets
> (part of
> jail chroot I suppose), PTYs, tunnel devices, SYSV IPC, file locks.
>
> Swap space and resident memory limits.
>
>
> The sysctl mechanism seems a good way to declare jails as having one
> capability
> or the other.  This would alleviate the need to keep updating the jail
> structure when someone has a new idea, especially handy since the single
> structure makes it very hard to work on more than one new idea at a
> time.


-- 
======================================================================  
- Best regards, Nikolay Pavlov. <<<-----------------------------------    
======================================================================  

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