<div dir="ltr">Nir,<div><br></div><div>The use cases of my current configuration is a mix of duplicated data clusters (Percona/Consul/CouchBase) and ephemeral systems (web servers) that work perfectly when 'locked' to a local host These are built in such a way that losing a physical host reduces redundancy but isn't outwardly service degrading. The other side is the duplicated databases (namely Percona) that would induce a fairly high level of NAS bandwidth that is avoided when they leverage the local storage on their host system.</div><div><br></div><div>The goal would be to have the ability to house the highly redundant and/or ephemeral systems to be housed on the hosts local storage, whereas guests that need HA or one-offs would be housed using the NAS allowing seamless HA or online migration.</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, May 13, 2016 at 7:04 AM, Nir Soffer <span dir="ltr"><<a href="mailto:nsoffer@redhat.com" target="_blank">nsoffer@redhat.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">On Thu, May 12, 2016 at 5:50 AM, Jason Ziemba <<a href="mailto:jason@ziemba.net">jason@ziemba.net</a>> wrote:<br>
> I'm fairly new to oVirt (coming from ProxMox) and trying to wrap my head<br>
> around the mixed (local/NAS) data domain options that are available.<br>
><br>
> I'm trying to configure a set of systems to have local storage, as their<br>
> primary data storage domain, though also want to have the ability to have a<br>
> NAS based data domain for guests that are 'mobile' between hosts. Currently<br>
> I'm able to do one or the other, but not both (so it seems).<br>
><br>
> When I put all of the systems in to a single cluster (or single data-center)<br>
> I'm able to have the shared data domain, though have only found the ability<br>
> to configure one system for local storage (not all of them). When I split<br>
> them out in to separate data centers, they all have their local data domain<br>
> working, but only a single dc is able to access the shared data domain at a<br>
> time.<br>
><br>
> Am I missing something along the way (probably fairly obvious) that does<br>
> exactly what I'm outlining, or is this functionality not available by<br>
> design?<br>
<br>
</span>This is not available by design.<br>
<br>
Can you explain the use case, why do you need to use local storage as<br>
your primary data storage?<br>
<br>
How are you going to migrate your vms if the primary storage is local?<br>
<br>
How are you going to start the vms on another host after host failures,<br>
if the vm storage is on the failed host, and the last state of that disk<br>
is not available or even lost?<br>
<span class="HOEnZb"><font color="#888888"><br>
Nir<br>
</font></span></blockquote></div><br></div>