RE: [Xen-users] The questions when I install Xen on RHEL4!!! Plz help me!! Thanks...

["Petersson, Mats" <Mats.Petersson@xxxxxxx>]

 

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From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of ??
Sent: 14 August 2006 12:54
To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] The questions when I install Xen on RHEL4!!! Plz help me!! Thanks...

Hello everyone:

    Last week I learnt to install Xen on RHEL4. The virtual system is Fedora5. I can run it now,but I met several questions. I hope you can help me deal with them.

 

    First: When I use the command "usr/sbin/xm create -c /boot/fc5vm.cfg" to startup Fedora5, it always display this wrong message before the system startup.

      problem:        using config file '/boot/fc5vm.cfg' 

                      warning: The nics option is deprecated,please use an empty vif entry instead:

                      vif = ['']

                      Error:[2,'No such file or directory']

      although it display this wrong message,it can boot the fedora5 on Xen. 

Don't know the answer to this... Maybe you could post the configurtion file and error logs from xm dmesg, /var/log/xend.log and such?

 

   

    Second: If I want to build multi-OS on Xen,Am I need to build several partition on my disk? For example:hda5 for the first fedora5,hda6 for second fedora5. For the moment I only know boot first fedora5 on terminal one,boot second fedora5 on terminal two,but there are only 7 terminals we can use.If I want simulate a cluster which include more than 7 nodes on Xen,the terminals are not enough,so how to deal with this problem?

 

Nope, you can use file-backed VM's just fine - that is, you have a image-file that becomes the "disk" for the virtual machine. You can have as many files as you like on a disk [well, until you run out of diskspace at least...].

 

Obviously, depending on what you're doing with the virtual machine, there may be advantages with using a partition or physical disk, but that's a different storye.

    Third: Can one terminal only boot one virtual OS?

 

Terminal? You can run multiple virtual machines on one machine, but I'm not sure what you mean by the word terminal here. I think you may mean "machine" or "display", in which case the answer is "no, it can be several".

    Fourth: The virtual OS use the physical swap partition.If we have two virtual OS now,does these two OS share the physical swap partition or not? This is my last question! 

 

That would not work. The swap partition is really an extension of your RAM in the computer, and each virtual machine will need to have a swap "partition". But like above, you can use file-backed swap "disks", so the swap-partition is just part of your existing files on the hard-disk.

 

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Mats

    Thansk for all your helps. Plz reply soon!!!

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