On Mon, Apr 30, 2018 at 2:01 PM, Eduardo Mayoral <emayo...@arsys.es> wrote:
> On 30/04/18 12:51, Tony Brian Albers wrote: > > On 30/04/18 11:43, Eduardo Mayoral wrote: > >> Hi, > >> > >> I would like to set up a new oVirt deployment with hosts that have > >> the VMs running on local attached storage. I understand this has the > >> requirement of having each host in its own cluster (and own datacenter, > >> it seems, I understand the need for the dedicated cluster, not so much > >> for the dedicated datacenter). > >> > >> At the same time, I would like to have some shared storage domains > >> so I can use it to export VMs or migrate them around hosts (probably in > >> three stages, first migrate VM storage from local to the shared storage > >> domain, second migrate the host (probably not possible to do a "hot" > >> migration, but at least "cold"), third migrate the VM storage from the > >> shared storage domain to the local storage domain of the new host). > >> > >> So I thought maybe I can deploy a datacenter in shared storage > mode, > >> with one cluster per host. Use one or two shared storage domains for > >> master and as an stage area for planned VM migrations as explained > >> before, and then configure several storage domains, one per host, as > >> posix FS . I would then deploy the VMs on the local posix FS storage > >> domains and set affinity rules for the VMs to their hosts as needed. > >> > >> Would this work? Is there a better way of achieving local storage > >> and retaining the ability to share storage among hosts and migrate VMs? > >> > >> > > Have you thought about using glusterfs? If hosts are physically close, > > that would probably be the best solution. > > > > Actually, yes, I also had glusterfs in mind. However one of the main > reasons to use local storage is performance, and I am concerned about > the write latencies of gluster (If using gluster, I would handle things > so the VM runs on one of the gluster nodes hosting the VM data, so I > assume the read latency will be close to the one I would get with local > storage, but the gluster replica(s) will be on other hosts, so write > latency may be significantly worse). > > Thanks a lot for the suggestion, it is a good one, however, the original > question stands: Would this work? Is there a better way of achieving > local storage and retaining the ability to share storage among hosts and > migrate VMs? > Hi Eduardo, We support shared storage domains in a local data center since oVirt 4.1. Will this help you by any chance? > Best regards, > > -- > Eduardo Mayoral. > _______________________________________________ > Users mailing list > Users@ovirt.org > http://lists.ovirt.org/mailman/listinfo/users >
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