[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-users] xvda vs lvm
> Hi, I'm just wondering if there are any speed or stability differences > between running a system directly of a LVM partition versus a xvd > partition? > I'm a little confused about what you're asking, so I'll explain a few things and hopefully it'll help some. Please ask again if I'm not answering the questions you wanted. > Basicly: > disk = [ 'phy:/dev/LVM/root,xvda,w', ] This exports /dev/LVM/root as the whole disk device /dev/xvda in the guest. > disk= [ 'phy:LVM/root,hda1,w',] This exports /dev/LVM/root (as before) as the partition /dev/hda1 in the guest. So, whether or not you include /dev in the device path, you're still exporting the same device. As to whether to export a whole device or a partition... Exporting as a single partition (e.g. /dev/hda1 in your example) has the advantage that /dev/LVM/root will be directly mountable in dom0 because it will not have been partitioned by the guest. The guest won't be allowed to repartition /dev/hda, it'll be stuck with one partition there. Exporting as a whole device gives the guest flexibility to partition its VBD as it sees fit but means it's slightly less convenient to mount /dev/LVM/root in dom0 (but there are tools to read the partition and make this easy for you). I usually go for the latter approach, but it doesn't matter in terms of speed and stability. It's really quest a question of administration convenience and how you want things to look like the guest. Cheers, Mark -- Dave: Just a question. What use is a unicyle with no seat? And no pedals! Mark: To answer a question with a question: What use is a skateboard? Dave: Skateboards have wheels. Mark: My wheel has a wheel! _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users
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