Den 13 jul 2014 17:47 skrev Niklas Fondberg <nik...@vireone.com>: > > > > From: Karli Sjöberg <karli.sjob...@slu.se> > Date: Sunday 13 July 2014 14:51 > To: Niklas Fondberg <nik...@vireone.com> > Cc: "users@ovirt.org" <users@ovirt.org>, Karli Sjöberg <karli.sjob...@slu.se> > Subject: Re: [ovirt-users] fileserver as a guest oVirt > >> >> Den 12 jul 2014 22:49 skrev Niklas Fondberg <nik...@vireone.com>: >> > >> > >> > >> > On 12 jul 2014, at 16:57, "Karli Sjöberg" <karli.sjob...@slu.se> wrote: >> > >> >> >> >> Den 12 jul 2014 15:45 skrev Niklas Fondberg <nik...@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.
Not that I'm trying to force my view of the world on you, but I get the feeling that you haven't really done any benchmarking to be able to come to any such conslusions. My advice would be to install "bonnie++" in both Host and Guest and compare results. You'll perhaps be surprised just how good a virtual hard drive can be. And remember, it only needs to be able to handle what's coming over the network, so the network is the bottleneck here, not the disks. /K > 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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