Re: [Xen-users] help for physical partition for booting XenU

[Nico Kadel-Garcia <nkadel@xxxxxxxxx>]

techy geek wrote:
> Hi All,
>
> I need help for creating private file system for Guest OS: XenU
>
> I had successfully booted my host OS with Xen0 which is running 
> linux2.6.18 version  and is using the physical device /dev/hda1.
> Now my next step is to  boot the guest OS and  for that  I first need 
> to create the private file system for this  guest OS. As you mentioned 
> there could be 3 methods to create a private file system:
> * File Based image
> * LVM Based
> * Physical Partition
>
> Now as per my understanding, File Based Image is easy to create but 
> has some poor I/O performance and from I/O performance perspective, 
> Physical Partition is better. My requirement for installing Xen is  to 
> do some OS profiling on Guest OS, so that way it seems Physical 
> Partition could be right choice for me.
> Could you please let me know the step-by-step approach to set up 
> Physical partiton for booting XenU. Also let me know the  changes I 
> need to make for my config file for booting XenU-(Guest OS).
> Also, if possible let me know for file based image so that I can have 
> one different domain running on File Based image(File system) and can  
> try profiling on this also.
> My available drives are /dex/hda2 /dev/sda1 /dev/sda2 /dev/sdb1 /dev/sdb2
I like using LVM, because I can more gracefully resize or snapshot the 
partitions and work with the snapshot, rather than the original 
partition, for backup purposes. It's performance is similar if not 
identical to that of a physical partition.
Are you comfortable working with fdisk to create partitions? And what 
does your partitioning look like right now? If all your extra disk is 
already in LVM "physical volumes" and "group volumes", it'll be simpler 
to create a new "logical volume" with the command 'lvcreate'.
You've also failed to say what OS your Dom0 is, which affects the tools 
available for building your DomU, and whether you want full 
virtualization or para-virtualization. It makes a difference!
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