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? Best regards, -- Eduardo Mayoral. _______________________________________________ Users mailing list [email protected] http://lists.ovirt.org/mailman/listinfo/users
