Hi Yaniv, > Il giorno 18 dic 2016, alle ore 17:37, Yaniv Kaul <yk...@redhat.com> ha > scritto: > > > >> On Sun, Dec 18, 2016 at 6:21 PM, Alessandro De Salvo >> <alessandro.desa...@roma1.infn.it> wrote: >> Hi, >> having a 3-node ceph cluster is the bare minimum you can have to make it >> working, unless you want to have just a replica-2 mode, which is not safe. > > How well does it perform?
One if the ceph clusters we use had exactly this setup: 3 DELL R630 (ceph jewel), 6 1TB NL-SAS disks so 3 mons, 6 osds. We bound the cluster network to a dedicated interface, 1Gbps. I can say it works pretty well, the performance reaches up to 100MB/s per rbd device, which is the expected maximum for the network connection. Resiliency is also pretty good, we can loose 2 osds (I.e. a full machine) without impacting on the performance. > >> It's not true that ceph is not easy to configure, you might use very easily >> ceph-deploy, have puppet configuring it or even run it in containers. Using >> docker is in fact the easiest solution, it really requires 10 minutes to >> make a cluster up. I've tried it both with jewel (official containers) and >> kraken (custom containers), and it works pretty well. > > This could be a great blog post in ovirt.org site - care to write something > describing the configuration and setup? Oh sure, if it may be of general interest I'll be glad to. How can I do it? :-) Cheers, Alessandro > Y. > >> The real problem is not creating and configuring a ceph cluster, but using >> it from ovirt, as it requires cinder, i.e. a minimal setup of openstack. We >> have it and it's working pretty well, but it requires some work. For your >> reference we have cinder running on an ovirt VM using gluster. >> Cheers, >> >> Alessandro >> >>> Il giorno 18 dic 2016, alle ore 17:07, Yaniv Kaul <yk...@redhat.com> ha >>> scritto: >>> >>> >>> >>>> On Sun, Dec 18, 2016 at 3:29 PM, rajatjpatel <rajatjpa...@gmail.com> wrote: >>>> Dear Team, >>>> >>>> We are using Ovirt 4.0 for POC what we are doing I want to check with all >>>> Guru's Ovirt. >>>> >>>> We have 2 hp proliant dl 380 with 500GB SAS & 1TB *4 SAS Disk and 500GB >>>> SSD. >>>> >>>> Waht we are done we have install ovirt hyp on these h/w and we have >>>> physical server where we are running our manager for ovirt. For ovirt hyp >>>> we are using only one 500GB of one HDD rest we have kept for ceph, so we >>>> have 3 node as guest running on ovirt and for ceph. My question you all is >>>> what I am doing is right or wrong. >>> >>> I think Ceph requires a lot more resources than above. It's also a bit more >>> challenging to configure. I would highly recommend a 3-node cluster with >>> Gluster. >>> Y. >>> >>>> >>>> Regards >>>> Rajat >>>> >>>> >>>> _______________________________________________ >>>> Users mailing list >>>> Users@ovirt.org >>>> http://lists.ovirt.org/mailman/listinfo/users >>>> >>> >>> _______________________________________________ >>> Users mailing list >>> Users@ovirt.org >>> http://lists.ovirt.org/mailman/listinfo/users >
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