[ovirt-users] GFS2 and OCFS2 for Shared Storage

[Pavel Gashev]

Fernando,

Clustered LVM doesn’t support lvmthin(7) http://man7.org/linux/man-pages/man7/lvmthin.7.html
There is an oVirt LVM-based thin provisioning implementation.

-----Original Message-----
From: Fernando Frediani <fernando.frediani at upx.com.br>
Date: Wednesday 23 November 2016 at 16:31
To: Pavel Gashev <Pax at acronis.com>, "users at ovirt.org" <users at ovirt.org>
Subject: Re: [ovirt-users] GFS2 and OCFS2 for Shared Storage

Are you sure Pavel ?

As far as I know and it has been discussed in this list before, the 
limitation is in CLVM which doesn't support Thinprovisioning yet. LVM2 
does, but it is not in Clustered mode. I tried to use GFS2 in the past 
for other non-virtualization related stuff and didn't have much success 
either.

What about OCFS2 ? Has anyone ?

Fernando


On 23/11/2016 11:26, Pavel Gashev wrote:
> Fernando,
>
> oVirt supports thin provisioning for shared block storages (DAS or iSCSI). It works using QCOW2 disk images directly on LVM volumes. oVirt extends volumes when QCOW2 is growing.
>
> I tried GFS2. It's slow, and blocks other hosts on a host failure.
>
> -----Original Message-----
> From: <users-bounces at ovirt.org> on behalf of Fernando Frediani <fernando.frediani at upx.com.br>
> Date: Wednesday 23 November 2016 at 15:03
> To: "users at ovirt.org" <users at ovirt.org>
> Subject: [ovirt-users] GFS2 and OCFS2 for Shared Storage
>
> Has anyone managed to use GFS2 or OCFS2 for Shared Block Storage between
> hosts ? How scalable was it and which of the two work better ?
>
> Using traditional CLVM is far from good starting because of the lack of
> Thinprovision so I'm willing to consider either of the Filesystems.
>
> Thanks
>
> Fernando
>
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