[linux-lvm] pvs -a on a partition of ZFS block device
Zdenek Kabelac
zkabelac at redhat.com
Wed Jun 11 09:33:22 UTC 2014
Dne 11.6.2014 10:43, alessandro macuz napsal(a):
>
>
> 2014-06-11 9:53 GMT+02:00 Oliver Rath <rath at mglug.de <mailto:rath at mglug.de>>:
>
> Hi Alex,
>
> Im not sure if I understand right: You take a zfv-Volume to create a lvm
> volume inside? Make it sense to mix two similar concepts in this way? Imho
> zfs and lvm are focussed to different goals, so if you combine it, you get
> the worse of both.
>
> What is your goal mixing these concepts? If you have created a zfs-volume,
> you can mount it directly without detouring over lvm and vice versa.
>
> I think it is much better to decide for one of these (zfs-volumes XOR
> lvm-Volumes) depending on your needs.
>
> Just my 2ct
>
> Regards
> Oliver
>
>
> Hi Oliver,
>
> I see and back your point since the flexibility given by LVM can be obtained
> with ZFS as well.
> In this case I'm not trying to achieve anything but rather dealing with
> something already existing and without making too many changes I'd like to
> access that volume. I think my reasoning is correct but somehow I see
> something non-expected. I thought I could use pvs, and lvs later on, on any
> block device as for any physical disks.
>
> Maybe pvs is coded to work only with some devices on purpose, I haven't looked
> at the source. I don't think what I'm doing is wrong in theory and I would
> like to know if instead, from the theoretically point of view, it is.
>
> Thanks, Alex
Support for ZFS partitions has been embedded into 2.02.106 lvm2 version.
You may as well add it to older version of lvm2 by updating your lvm.conf
https://bugzilla.redhat.com/show_bug.cgi?id=913597
You can add the following to your /etc/lvm.conf devices section to solve the
issue:
types = [ "zvol", 16 ]
Zdenek
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