[ovirt-users] fileserver as a guest oVirt

[Daniel Helgenberger]

Hello,

just add my 2ct: I did a lot of bench marking for our SAN (FC LUN's). I
also need file servers for our SMB Clients.

I recommend using Direct Attached LUNs for your purpose and attach them
to the VMs as VirtIO-SCSI disks. You can even added them as shareable to
oVirt if you deploy some kind of SAN file system (we use Quantum's
StorNext).

Bottom line, the implementation of VirtIO-SCSI is so well done and
support in oVirt is great. I cound not see any bottlenecks in the
visualization. For the foreseeable future I will not deploy bare metal
file Servers again.

HTH,

On So, 2014-07-13 at 15:47 +0000, Niklas Fondberg wrote:
> 
> From: Karli Sjöberg <Karli.Sjoberg at slu.se<mailto:Karli.Sjoberg at slu.se>>
> Date: Sunday 13 July 2014 14:51
> To: Niklas Fondberg <niklas at vireone.com<mailto:niklas at vireone.com>>
> Cc: "users at ovirt.org<mailto:users at ovirt.org>" <users at ovirt.org<mailto:users at ovirt.org>>, Karli Sjöberg <Karli.Sjoberg at slu.se<mailto:Karli.Sjoberg at slu.se>>
> Subject: Re: [ovirt-users] fileserver as a guest oVirt
> 
> 
> Den 12 jul 2014 22:49 skrev Niklas Fondberg <niklas at vireone.com<mailto:niklas at vireone.com>>:
> >
> >
> >
> > On 12 jul 2014, at 16:57, "Karli Sjöberg" <Karli.Sjoberg at slu.se<mailto:Karli.Sjoberg at slu.se>> wrote:
> >
> >>
> >> Den 12 jul 2014 15:45 skrev Niklas Fondberg <niklas at vireone.com<mailto:niklas at vireone.com>>:
> >> >
> >> > Hi,
> >> >
> >> > I'm new to oVirt but I must say I am impressed!
> >> > I am running it on a HP DL380 with an external SAS chassi.
> >> > Linux dist is Centos 6.5 and oVirt is 3.4 running all-in-one (for now until we need to have a second host).
> >> >
> >> > Our company (www.vireone.com) deals with system architecture for many telco and media operators and is now setting up a small own datacenter for our internal tests as well as our IT infrastructure.
> >> > We are in the process of installing Zentyal for the SMB purposes on a guest and it would be great to have that guest also serving a fs path directory with NFS + SMB (which is semi crippled on the host after oVirt installation with version 3 et.c.).
> >> >
> >> > Does anyone have an idea of how I can through oVirt (seen several solutions using virsh and kvm) letting my Zentyal Ubuntu guest have access to a host mount point or if necessary (second best) a seperate partition?
> >> >
> >> > Best regards
> >> > Niklas
> >> >
> >>
> >> Why not just give the guest a thin provision virtual hard drive and expand it on a demand basis?
> >>
> >> /K
> >
> > Thanks for the advise but this would not suite us I'm afraid. It would be difficult wrt incremental backups as well as host machine file-routines.
> >
> >
> 
> Well, going by Occam's raizor; the simplest answer is usually correct. Can't really tell what you mean by file-routines but backups would be well served by snapshots (can't get more incremental than that) and disaster recovery could be as easy as a rsync from inside the guest to a remote machine.
> 
> The biggest pros here is the ease of being able to setup an export domain, attach, export the VM, detach domain, and then attach and import to a "real" setup when the AIO starts feeling crowded later on. Thinking ahead is never a bad thing, no?
> 
> /K
> 
> Thanks for your suggestions!
> The thing also is that the performance will be very bad if we have the 25TB SAS array shared for our purposes (lots of media streaming) using a virtual disk.
> What I am after (after more reading) is support for virtio-9p-pci (http://www.linux-kvm.org/page/9p_virtio) using oVirt. Alternative is the Direct LUN hook (http://www.ovirt.org/VDSM-Hooks/directlun, if I can figure out how to work with hooks...)
> Any chance anybody has an answer for these questions?
> 
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Daniel Helgenberger 
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