>Please clarify what are the disk groups that you are referring to? 
Either Raid5/6 or Raid10 with a HW controller(s).


>Regarding your statement  "In JBOD mode, Red Hat support only 'replica 3' >volumes." does this also mean "replica 3" variants ex. 
>"distributed-replicate" 
Nope, As far as I know - only when you have 3 copies of the data ('replica 3' only).

Best Regards,
Strahil Nikolov


On Wed, Oct 14, 2020 at 7:34 AM C Williams <cwilliams3320@gmail.com> wrote:
> Thanks Strahil !
>
> More questions may follow. 
>
> Thanks Again For Your Help !
>
> On Wed, Oct 14, 2020 at 12:29 AM Strahil Nikolov <hunter86_bg@yahoo.com> wrote:
>> Imagine you got a host with 60 Spinning Disks -> I would recommend you to split it to 10/12 disk groups and these groups will represent several bricks (6/5).
>>
>> Keep in mind that when you start using many (some articles state hundreds , but no exact number was given) bricks , you should consider brick multiplexing (cluster.brick-multiplex).
>>
>> So, you can use as many bricks you want , but each brick requires cpu time (separate thread) , tcp port number and memory.
>>
>> In my setup I use multiple bricks in order to spread the load via LACP over several small (1GBE) NICs.
>>
>>
>> The only "limitation" is to have your data on separate hosts , so when you create the volume it is extremely advisable that you follow this model:
>>
>> hostA:/path/to/brick
>> hostB:/path/to/brick
>> hostC:/path/to/brick
>> hostA:/path/to/brick2
>> hostB:/path/to/brick2
>> hostC:/path/to/brick2
>>
>> In JBOD mode, Red Hat support only 'replica 3' volumes - just to keep that in mind.
>>
>> From my perspective , JBOD is suitable for NVMEs/SSDs while spinning disks should be in a raid of some type (maybe RAID10 for perf).
>>
>>
>> Best Regards,
>> Strahil Nikolov
>>
>>
>>
>>
>>
>>
>> В сряда, 14 октомври 2020 г., 06:34:17 Гринуич+3, C Williams <cwilliams3320@gmail.com> написа:
>>
>>
>>
>>
>>
>> Hello,
>>
>> I am getting some questions from others on my team.
>>
>> I have some hosts that could provide up to 6 JBOD disks for oVirt data (not arbiter) bricks 
>>
>> Would this be workable / advisable ?  I'm under the impression there should not be more than 1 data brick per HCI host .
>>
>> Please correct me if I'm wrong.
>>
>> Thank You For Your Help !
>>
>>
>> _______________________________________________
>> Users mailing list -- users@ovirt.org
>> To unsubscribe send an email to users-leave@ovirt.org
>> Privacy Statement: https://www.ovirt.org/privacy-policy.html
>> oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/
>> List Archives: https://lists.ovirt.org/archives/list/users@ovirt.org/message/OGZISNFLEG3GJPDQGWTT7TWRPPAMLPFQ/
>>
>