Re: [CentOS-virt] my domU from jailtime.org using latests xen kernel freezees

[Kai Schaetzl]

Christopher G. Stach II wrote on Thu, 22 May 2008 21:27:13 -0500:

 There are a lot of benefits to using jailtime images which are obvious 
 to those who need them.

Which would be? (Remember, we are talking of CentOS 5 images only!)

Kai

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Re: [CentOS-virt] my domU from jailtime.org using latests xen kernel freezees

[Luke S Crawford]

Kai Schaetzl [EMAIL PROTECTED] writes:
 David Hláèik wrote on Thu, 22 May 2008 13:34:17 +0200:
 
  disk = [ 'tap:aio:/home/xen/webdev/webdev_root.img,sda1,w',
  'tap:aio:/home/xen/webdev/webdev_swap.img,sda2,w' ]
 
 I suggest using file: instead of tap:aio (I haven't tested this, but it's 
 been said here or elsewhere several times that it is faster than tap:aio)  
 I've been using it all the time with good results.)

the tap driver is quite a bit faster than what file: does (file: 
mounts the file as a loopback device, and passes in the loopback device to
the DomU. the tap driver directly manipulates the blocks in the file.)

for more details:

http://www.usenix.org/events/usenix05/tech/general/full_papers/short_papers/warfield/warfield_html/index.html

  root = /dev/sda1 ro
 
 You do not need that, comment it out.

You need that if you are not using pygrub.  

 Btw: *why* do you want to use a jailtime image if you can just 
 install/kickstart a CentOS 5 VM in no time?

I agree this is probably the best course of action if you want CentOS 5. 
virt-install will give you a working system with pygrub (and 
I think pygrub is keen.) 
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