[ovirt-users] NAS for oVirt

[Karli Sjöberg]

Den 23 dec. 2016 23:49 skrev "rightkicktech.gmail.com" <rightkicktech at gmail.com>:
>
> Hi Mikhail,
>
> Thank you for your suggestion.
> Have you had any performance issues with freenas? It has been mentioned on some blogs that freenas might have performance issues. Not sure why.

I can't say for sure either since the statement is too unspecific. Like saying that "CentOS might have performance issues", it's too vague. Though what I'd guess is that since ZFS honors syncs over NFS, write performance is affected. Either you turn sync off (epic bad) or add a SSD that you use as log disk which makes the performance problem go away, plus mitigates a lot of the fragmentation that would otherwise build with time. Remember to configure the disks as RAID10, or striped mirrors in ZFS-speak, when using it for VM workload for maximum IOPS.

We have been using a FreeBSD machine with ZFS serving NFS to our oVirt environment for more than five years without larger issues.

Merry Christmas!

/K

> A clean Centos with NFS sounds ok also. What do you do if you need snapshots of data? Lvm snapshots?
>
> Alex
>
> On December 23, 2016 5:08:42 PM EET, "Краснобаев Михаил" <milo1 at ya.ru> wrote:
>>
>> Hi,
>>
>> it mainly depends on the budget. I can give you some advice from my own experience:
>>
>> SMB systems from QNAP or any other vendor don't cope well with the load that OVirt generates (simultaneous access), because they are usually built on slow drives.
>> Using 15K drives helps a bit. I have a Centos machine that is used only as a file storage (NFS, 4x15K drives in raid5).
>>
>> I would suggest trying to built a Freenas machine on NL-SAS drives + SSD cache. In my opinion it would the most cost efficient decision.
>>
>> Best regards,
>>
>> MIkhail
>>
>> 23.12.2016, 15:53, "rightkicktech.gmail.com" <rightkicktech at gmail.com>:
>>>
>>> Hi all,
>>>
>>> I am thinking to setup an environment with oVirt and centralized storage using a NAS that supports NFS and iSCSI.
>>>
>>> The setup will be used to host approx 20 VMs. The VMs wi ll be running critical services and not for testing. I have seen several from QNAP, iXsystems (freenas mini), ...
>>> What NAS would you recommend for this setup?
>>>
>>> Thanx,
>>> Alex
>>> --
>>> Sent from my Android device with K-9 Mail. Please excuse my brevity.,
>>>
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>>
>>
>>
>> --
>> С уважением, Краснобаев Михаил.
>>
>>
>
>
> --
> Sent from my Android device with K-9 Mail. Please excuse my brevity.
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