<div dir="ltr">Luca many thanks! that was fast and good! one last thing, how do I migrate to the new data domain? I use oVirt version 4.2.0<div>Thanks again!</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Mar 8, 2018 at 1:23 PM, Luca 'remix_tj' Lorenzetto <span dir="ltr"><<a href="mailto:lorenzetto.luca@gmail.com" target="_blank">lorenzetto.luca@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hello Maoz,<br>
<br>
i'm serving more than 300 vms in fc setup (and growing).<br>
<span class=""><br>
On Thu, Mar 8, 2018 at 12:16 PM, maoz zadok <<a href="mailto:maozza@gmail.com">maozza@gmail.com</a>> wrote:<br>
> Hello All,<br>
> I connected existing data center with NFS storage domain to a new<br>
> Fiber-Channel storage domain according to the following guide, and I have<br>
> three questions.<br>
> <a href="https://www.ovirt.org/documentation/install-guide/chap-Configuring_Storage/" rel="noreferrer" target="_blank">https://www.ovirt.org/<wbr>documentation/install-guide/<wbr>chap-Configuring_Storage/</a><br>
><br>
> 1. why does the storage domain asks me to "Use Host"?<br>
<br>
</span>Because there are some operations (lvm initialization & so on) to be<br>
done while setting up the volumes on FC storage. These operations will<br>
be performed by the given host<br>
<span class=""><br>
><br>
> does it mean that if this host is down there is no access to the FC storage<br>
> or the next available host elected to manage the FC storage?<br>
<br>
</span>No, storage is mapped by all the hosts and accessed directly<br>
<span class=""><br>
> does it mean that all the traffic to my storage is routed via the selected<br>
> host?<br>
<br>
</span>Absolutely no!<br>
<span class=""><br>
> what is the best practice, do I need to split the workload to other hosts as<br>
> well by letting each host manage one small LUN instead of letting one host<br>
> manage all LUNs or one big LUN?<br>
<br>
</span>I supposte that your question is related to the way that FC is<br>
managed. Since every host sees all the drives, there question is no<br>
more appropriate.<br>
<span class=""><br>
<br>
><br>
> 2. is it possible to set the newly created fiber-channel storage(data<br>
> domain) as master?<br>
<br>
</span>IIRC if you set to maintenance the existing master, another one will<br>
be selected.<br>
<span class=""><br>
><br>
> 3. can I easily migrate all VM disks to the FC storage instead of the NFS?<br>
><br>
<br>
</span>Sure, nfs storage domain or fc storage domain doesn't make difference<br>
in terms of interaction. You can move disks from one to the other<br>
without issues.<br>
<span class="HOEnZb"><font color="#888888"><br>
Luca<br>
<br>
--<br>
"E' assurdo impiegare gli uomini di intelligenza eccellente per fare<br>
calcoli che potrebbero essere affidati a chiunque se si usassero delle<br>
macchine"<br>
Gottfried Wilhelm von Leibnitz, Filosofo e Matematico (1646-1716)<br>
<br>
"Internet è la più grande biblioteca del mondo.<br>
Ma il problema è che i libri sono tutti sparsi sul pavimento"<br>
John Allen Paulos, Matematico (1945-vivente)<br>
<br>
Luca 'remix_tj' Lorenzetto, <a href="http://www.remixtj.net" rel="noreferrer" target="_blank">http://www.remixtj.net</a> , <<a href="mailto:lorenzetto.luca@gmail.com">lorenzetto.luca@gmail.com</a>><br>
</font></span></blockquote></div><br></div>