>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 <[email protected]> wrote:
> Thanks Strahil !
>
> More questions may follow.
>
> Thanks Again For Your Help !
>
> On Wed, Oct 14, 2020 at 12:29 AM Strahil Nikolov <[email protected]>
> 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
>> <[email protected]> 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 !
>>
>>
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