Re: [ovirt-users] Local and Shared storage in same datacenter

Mike, As workaround it's not very hard to create a mount command wrapper that converts local NFS mounts to bind-mounts. The propper way I think is to patch the VDSM service to handle local NFS mounts. In result, a NFS storage will work like a local storage if it's local.

-----Original Message----- From: Mike <maillist(a)probie.nl&gt; Date: Monday 31 October 2016 at 16:33 To: Pavel Gashev <Pax(a)acronis.com&gt;, &quot;users(a)ovirt.org&quot; <users(a)ovirt.org&gt; Subject: Re: [ovirt-users] Local and Shared storage in same datacenter Hi Pavel, Op 31-10-2016 om 11:22 schreef Pavel Gashev: > Mike, > > You can share and use your local storage via NFS. So all your storages are shared, and can be used in the same datacenter. I installed a nfs server on the hypervisor and am using it that way at the moment. It feels 'wrong' but it seems to work okay and it is fast as far as I can tell. Still would like to see another solution without the added latency of nfs and be able to utilize directio, etc. > > -----Original Message----- > From: <users-bounces(a)ovirt.org&gt; on behalf of "Mike (maillinglists)" <maillist(a)probie.nl&gt; > Date: Sunday 30 October 2016 at 13:02 > To: &quot;users(a)ovirt.org&quot; <users(a)ovirt.org&gt; > Subject: [ovirt-users] Local and Shared storage in same datacenter > > Hi guys, > > There have been a few related questions already that I could find, but I > did not find anything relating to my specific use case. > > Currently it is not possible to mix local storage with shared storage in > the same datacenter. > The reason seems to be because of the storage pool manager (SPM). > This is a role in the datacenter provided to one specific host. > > While I understand that this makes having local storage impossible, I > believe there is a use case to have local storage in a shared storage > datacenter. > Consider the following: > I have a few applications that require 1 milli second latency and at > most 2 milli second. > That is not consistenly achievable with shared storage, to that end I > added flash storage to a few hypervisors. > About 5% of my servers require this and are not that resource hungry to > require a dedicated physical server. > That same 5% also has no requirement to be migrated if a host fails. > > So in short I have 5 heavy hosts running ovirt with a shared storage > domain on NFS for 95% of my servers. > All running fine, but I am now unable to run my remaining 5%. > > To finish up my summary I have been testing various virtualization > technologies, like VmWare and Hyper-V. > They allow such configurations as I mentioned. > > I already had some chat on irc with various guys and they suggested that > I put this on the mailing list, so here goes. > > My suggestion would be to evoluate from SPM to SDM. > SDM stands for Storage Domain Manager. > This would create the possibility to have all nodes in the datacenter > participate in the storage handling. > A extra benefit would be that local storage could be added. > > What do you think? > > Thanks for reading. > > Kind regards, > Mike van Goor > _______________________________________________ > Users mailing list > Users(a)ovirt.org > http://lists.ovirt.org/mailman/listinfo/users > > _______________________________________________ Users mailing list Users(a)ovirt.org http://lists.ovirt.org/mailman/listinfo/users