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Hi Sean,
thanks for the suggestions.

On Thu, 8 Dec 2016 at 23:10, Sean McGinnis <sean.mcginnis at gmx.com> wrote:

> Hi Belmiro,
>
> In Cinder there is the "raw disk device" driver that has been used by some
> for Hadoop and similar applications. That may be something to look at, but
> with a big warning.
>
> That being that it is deprecated in the Ocata release and will be removed
> in Pike.
>
> The reason it is going to be removed has a couple reasons though. One big
> one is that it is unable to meet the "minimum feature set" that we require
> for a Cinder driver. There are just too many restrictions on what can be
> done when you're using raw disk.
>
> The other reason was that after running a set of tests, it we really didn't
> see that much of a difference in uing the raw device driver vs. configuring
> the LVM driver appropriately. I don't have the full details of those tests
> handy at the moment, but I'm sure we can track down some specifics if
> needed.
>
> So I would recommend connecting your JBODs to some compute hosts and using
> that disk space to back LVM, then configure Cinder with the LVM driver to
> use that pool of space to present volumes to your compute instances.
>
> Thanks,
> Sean
>
> On Thu, Dec 08, 2016 at 07:46:35PM +0100, Belmiro Moreira wrote:
> > Hi,
> >
> > we have a set of disk servers (JBOD) that we would like to integrate into
> > our cloud to run   applications like Hadoop and Spark.
> >
> > Using file disks for storage and a huge "/var/lib/nova" is not an option
> > for these use cases so we would like to expose the local drives directly
> to
> > the VMs as ephemeral disks.
> >
> >
> >
> > Is there already something in Nova that allows this?
> >
> >
> >
> > thanks,
> >
> > Belmiro
> >
> > CERN
>
> >
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