[ovirt-users] Fibre Channel Protocol (FCP)

[maoz zadok]

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
Thanks again!

On Thu, Mar 8, 2018 at 1:23 PM, Luca 'remix_tj' Lorenzetto <
lorenzetto.luca at gmail.com> wrote:

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