Re: [ovirt-users] Fibre Channel Protocol (FCP)

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(a)gmail.com&gt; 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(a)gmail.com&gt;