On 07/22/2014 06:15 PM, Itamar Heim wrote:
On 07/16/2014 06:46 PM, Demeter Tibor wrote:
> Hi,
>
> We have a production environment with KVM+centos6 and we want to switch
> to ovirt.
> At this moment we have 12 VM on three independent server.
> This VMs uses the local disks of servers, we don't have a central
> storage.
>
> currently we have for ovirt
>
> - Two Dell R710 with 128 gigs of ram.
> - A third dell server for ovirt-engine.
> - four 1 gb/sec NICs/ server.
> - Smart GB switch
>
> we would like make an ovirt environment with
>
> - clusterized, redundant filesystem, data loss protection
> - If a host goes to down the VMs could made a restart on the remain host
> - LACP/bonding (mode 6) for fast I/O beetwen gluster hosts, we don't
> have 10Gbe nics
> - 8 TB of disk capacity for VMs
>
> we don't want:
>
> - using hw raid on servers, because we need free disk tray for more
> capacity
>
> My questions.
>
> - Which glusterfs method is the best for us for performance?
vijay?
A replicated gluster volume does help for availability and performance.
Please ensure that you optimize the gluster volume for virtualization by
applying the performance settings in virt profile [1].
> - Can I make a real "performance" disk i/o by 4-4 NICs
? Or I need 10
> Gbe nic for this?
> - How much disk need for good redundancy/performance? 4/server or
> 2/server ?
> - What will the weak point our project?
make sure to use gluster with replica 3, which needs 3 servers?
maybe use hosted engine to remove need for dedicated server for it?
Using replica 3 volumes would provide better protection for split-brains.
Thanks,
Vijay
[1]
https://github.com/gluster/glusterfs/blob/master/extras/group-virt.example