[ovirt-users] oVirt storage best practise

[Elad Ben Aharon]

Hi,
Answer inline

On Thu, Jun 8, 2017 at 1:07 PM, Stefano Bovina <bovy89 at gmail.com> wrote:

> Hi,
> does a storage best practise document for oVirt exist?
>
>
> Some examples:
>
> oVirt allows to extend an existing storage domain: Is it better to keep a
> 1:1 relation between LUN and oVirt storage domain?
>
What do you mean by 1:1 relation? Between storage domain and the number of
LUNs the domain reside on?

> If not, is it better to avoid adding LUNs to an already existing storage
> domain?
>
No problems with storage domain extension.

>
> Following the previous questions:
>
> Is it better to have 1 Big oVirt storage domain or many small oVirt
> storage domains?
>
Depends on your needs, be aware to the following:
- Each domain has its own metadata which allocates ~5GB of the domain size.
- Each domain is being constatntly monitored by the system, so large number
of domain can decrease the system performance.
There are also downsides with having big domains, like less flexability

> There is a max num VM/disks for storage domain?
>
>
> In which case is it better to use "direct attached lun" with respect to an
> image on an oVirt storage domain?
>

>

> Example:
>
> Simple web server:   ----> image
> Large database (simple example):
>    - root,swap etc: 30GB  ----> image?
>    - data disk: 500GB    -----> (direct or image?)
>
> Regards,
>
> Stefano
>
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>
>
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