[ovirt-users] planning ovirt for production

[Vijay Bellur]

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