[CentOS] LVM hatred, was Re: /boot on a separate partition?

Fri Jun 26 10:47:41 UTC 2015
Steve Clark <sclark at netwolves.com>

On 06/25/2015 06:44 PM, Chris Murphy wrote:
> Gordon Messmer gordon.messmer at gmail.com  Wed Jun 24 01:42:13 UTC 2015
>> I wondered the same thing, especially in the context of someone who
>> prefers virtual machines.  LV-backed VMs have *dramatically* better disk
>> performance than file-backed VMs.
> I did a bunch of testing of Raw, qcow2, and LV backed VM storage circa
> Fedora 19/20 and found very little difference. What mattered most was
> the (libvirt) cache setting, accessible by virsh edit the xml config
> or virt-manager through the GUI. There have been a lot of
Which setting did you find most effective?
> optimizations in libvirt and qemu that make qcow2 files perform
> comparable to LVs.
> For migrating VMs, it's easier if they're a file. And qcow2 snapshots
> are more practical than LVM (thick) snapshots. The thin snapshots are
> quite good though they take a lot of familiarity with setting them up.

Stephen Clark
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