Re: [ovirt-users] Hardware critique

Yaniv, I appreciate your input, thanks! I understand that everyone's use case is different, but I was hoping to hear from some users that are using oVirt hyper-converged setup and get some input on the performance. When I research GlusterFS I hear a lot about how it can be slow especially when dealing with small files. I'm starting to wonder if a straight up NFS server with a few SSDs would be less hassle and perhaps offer better VM performance than glusterFS can currently. I want to get the best oVirt performance I can get (on somewhat of a budget) with a fairly small amount of required disk space (under 2TB). I'm not sure if hyper-converged setup w/GlusterFS is the answer or not. I'd like to avoid spending 15k only to find out that it's too slow. On Fri, Apr 6, 2018 at 6:05 AM, Yaniv Kaul <ykaul(a)redhat.com&gt; wrote: > > > On Thu, Apr 5, 2018, 11:39 PM Vincent Royer <vincent(a)epicenergy.ca&gt; > wrote: > >> Jayme, >> >> I'm doing a very similar build, the only difference really is I am using >> SSDs instead of HDDs. I have similar questions as you regarding expected >> performance. Have you considered JBOD + NFS? Putting a Gluster Replica 3 >> on top of RAID 10 arrays sounds very safe, but my gosh the capacity takes a >> massive hit. Am I correct in saying you will only get 4TB total usable >> capacity out of 24TB worth of disks? The cost per TB in that sort of >> scenario is immense. >> >> My plan is two 2TB SSDs per server in JBOD with a caching raid card, >> with replica 3. I would end up with the same 4TB total capacity using 12TB >> of SSDs. >> > > I'm not sure I see the value in RAID card if you don't use RAID and I'm > not sure you really need caching on the card. > Y. > > >> I think Replica 3 is safe enough that you could forgo the RAID 10. But >> I'm talking from zero experience... Would love others to chime in with >> their opinions on both these setups. >> >> *Vincent Royer* >> *778-825-1057* >> >> >> <http://www.epicenergy.ca/> >> *SUSTAINABLE MOBILE ENERGY SOLUTIONS* >> >> >> >> >> On Thu, Apr 5, 2018 at 12:22 PM, Jayme <jaymef(a)gmail.com&gt; wrote: >> >>> Thanks for your feedback. Any other opinions on this proposed setup? >>> I'm very torn over using GlusterFS and what the expected performance may >>> be, there seems to be little information out there. Would love to hear any >>> feedback specifically from ovirt users on hyperconverged configurations. >>> >>> On Thu, Apr 5, 2018 at 2:56 AM, Alex K <rightkicktech(a)gmail.com&gt; wrote: >>> >>>> Hi, >>>> >>>> You should be ok with the setup. >>>> I am running around 20 vms (linux and windows, small and medium size) >>>> with the half of your specs. With 10G network replica 3 is ok. >>>> >>>> Alex >>>> >>>> On Wed, Apr 4, 2018, 16:13 Jayme <jaymef(a)gmail.com&gt; wrote: >>>> >>>>> I'm spec'ing hardware for a 3-node oVirt build (on somewhat of a >>>>> budget). I plan to do 20-30 Linux VMs most of them very light weight + a >>>>> couple of heavier hitting web and DB servers with frequent rsync backups. >>>>> Some have a lot of small files from large github repos etc. >>>>> >>>>> 3X of the following: >>>>> >>>>> Dell PowerEdge R720 >>>>> 2x 2.9 GHz 8 Core E5-2690 (SR0L0) >>>>> 256GB RAM >>>>> PERC H710 >>>>> 2x10GB Nic >>>>> >>>>> Boot/OS will likely be two cheaper small sata/ssd in raid 1. >>>>> >>>>> Gluster bricks comprised of 4x2TB WD Gold 7200RPM SATA HDDs in RAID >>>>> 10 per server. Using a replica 3 setup (and I'm thinking right now with no >>>>> arbiter for extra redundancy, although I'm not sure what the performance >>>>> hit may be as a result). Will this allow for two host failure or just one? >>>>> >>>>> I've been really struggling with storage choices, it seems very >>>>> difficult to predict the performance of glusterFS due to the variance in >>>>> hardware (everyone is using something different). I'm not sure if the >>>>> performance will be adequate enough for my needs. >>>>> >>>>> I will be using an all ready existing Netgear XS716T 10GB switch for >>>>> Gluster storage network. >>>>> >>>>> In addition I plan to build another simple glusterFS storage server >>>>> that I can use to georeplicate the gluster volume to for DR purposes and >>>>> use existing hardware to build an independent standby oVirt host that is >>>>> able to start up a few high priority VMs from the georeplicated glusterFS >>>>> volume if for some reason the primary oVirt cluster/glusterFS volume ever >>>>> failed. >>>>> >>>>> I would love to hear any advice or critiques on this plan. >>>>> >>>>> Thanks! >>>>> _______________________________________________ >>>>> 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 >>> >>> >> _______________________________________________ >> 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