Re: [Moosefs-users] RBD

[Ricardo J. B. <ric...@da...>]

El Miércoles 11/04/2012, Quenten Grasso escribió:
> Hi Ricardo,
>
> Well not quite what I meant, however I was referring to this "could" be
> adapted to the moosefs model as it also uses chunks to store data And could
> be very useful to allot of users who are trying to find a reasonable way to
> store virtual machines on mfs without the woes of metadata snap shotting?

Oh, yes, that would be very useful. I wanted to use a moosefs cluster to host 
virtual machines images to replace our current setup (DRBD + LVM), as we are 
currently moving /home to a separate moosefs cluster and the VM images are 
now much smaller.

But moosefs didn't work for me as we use virtio for better performance, but 
there is/was some problem combining fuse and directio.

Mind you, this was several months ago with CentOS 5.x, maybe things are better 
with CentOS 6.x (or with other distros). I'll have to give it try soon.

> Qemu-RBD is userspace vs cephs-RBD which is kernel.

I didn't know about qemu-rbd, it might be worth a look, thanks!

> Regards,
> Quenten Grasso
>
> -----Original Message-----
> From: Ricardo J. Barberis [mailto:ric...@da...]
> Sent: Thursday, 12 April 2012 7:02 AM
> To: moo...@li...
> Subject: Re: [Moosefs-users] RBD
>
> El Miércoles 11/04/2012, Quenten Grasso escribió:
> > Hey All,
> >
> > Has anyone tried using Ceph's Rados Block Device/QEMU-RBD on MooseFS?
> >
> > http://www.linux-kvm.com/content/cephrbd-block-driver-patches-qemu-kvm
> >
> > Regards,
> > Quenten
>
> Um, no but I assume rbd only works with Ceph? (from the website you
> linked: "rbd is described as a linux kernel driver that is part of the ceph
> file system module").
>
> I mean, Ceph is a distributed fault tolerant filesystem, just like MooseFS,
> it's not a "regular" filesystem like ext3, ext4, xfs.
>
> Regards,

-- 
Ricardo J. Barberis
Senior SysAdmin / ITI
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