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From Dustin Wright <dwri...@untangledtechnology.com>
Subject Re: CloudStack Design: Ceph and local storage
Date Fri, 17 Jun 2016 14:24:00 GMT
Thank you for the valuable feedback. I have been considering the same setup
Jeroen proposed.

I think what most of us want is something like onapp integrated storage. At
least that is what it sounds like to me.

It would be neat if ACS had a system vm baked in for running ceph, or some
type of distributed storage. Either VM or object storage. IMO, Running big
expensive enterprise SAN for your block storage doesn't feel very
cloud-like.

Dustin

On Fri, Jun 17, 2016 at 9:59 AM, Stephan Seitz <
s.seitz@secretresearchfacility.com> wrote:

> Hi!
>
> Independently from cloudstack, I'ld strongly recommend to not use ceph
> and hypervisors on the very same machines. If you just want to build a
> POC this is fine, but If you put load on it, you'll see unpredictible
> behavior (at least on the ceph side) due to heavy I/O demands.
> Ceph recommends at least 1 Core and 1 GB RAM as a rule of thumb for
> each OSD.
> BTW. I also won't run a ceph cluster with only two nodes. Your MON
> should be able to form a quorum, so you'ld need at least three  nodes.
>
> If you run a cluster with less than about 6 or 8 nodes, I'ld give
> gluster a try. I've never tried it myself but I assume this should
> be usable as "pre-setup" Storage at least with KVM Hosts.
>
> cheers,
>
> - Stephan
>
>
>
> Am Freitag, den 17.06.2016, 13:36 +0200 schrieb Jeroen Keerrel:
> > Good afternoon from Hamburg, Germany!
> >
> > Short question:
> > Is it feasible to use CloudStack with Ceph on local storage? As in
> > “hyperconverged”?
> >
> > Before ramping up the infrastructure, I’d like to be sure, before
> > buying new hardware.
> >
> > At the moment: 2 Hosts, each 2 6c XEON CPU, 24GB RAM and each have 6
> > 300GB SAS drives.
> >
> > According to CEPH, they advise bigger disks and separate storage
> > “nodes”.
> > CloudStack documentation says: Smaller, High RPM disks.
> >
> > What would you advise? Buy separate “Storage Nodes” or  ramp up the
> > current nodes?
> >
> > Cheers!
> > Jeroen
> >
> >
> >
> > Jeroen Keerl
> > Keerl IT Services GmbH
> > Birkenstraße 1b . 21521 Aumühle
> > +49 177 6320 317
> > www.keerl-it.com
> > info@keerl-it.com
> > Geschäftsführer. Jacobus J. Keerl
> > Registergericht Lubeck. HRB-Nr. 14511
> > Unsere Allgemeine Geschäftsbedingungen finden Sie hier.
> >
> >
>

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