Hi,

I agree with Yaniv. That's why when Discard After Delete was introduced in
oVirt 4.1, it was false by default.
However, since we realized that the demand for it to be true by default is
high, we changed it in oVirt 4.2 [1] so that it will be true by default.

If you got any further questions, please don't hesitate to ask.

Regards,
Idan

[1] *Bug 1456414* <https://bugzilla.redhat.com/show_bug.cgi?id=1456414> - New
domain should default to true on Discard After Delete

On Sun, Sep 10, 2017 at 2:50 PM, Yaniv Kaul <yk...@redhat.com> wrote:

>
>
> On Sun, Sep 10, 2017 at 1:55 PM, Troels Arvin <tro...@arvin.dk> wrote:
>
>> Hello,
>>
>> In the settings for a storage domain, in "Advanced Options", there is an
>> option "Discard After Delete". The default is that the checkbox is not
>> set.
>>
>> The documentation at
>> https://www.ovirt.org/develop/release-management/features/st
>> orage/discard-
>> after-delete/
>> <https://www.ovirt.org/develop/release-management/features/storage/discard-after-delete/>
>> and
>> https://www.ovirt.org/develop/release-management/features/storage/pass-
>> discard-from-guest-to-underlying-storage/
>> <https://www.ovirt.org/develop/release-management/features/storage/pass-discard-from-guest-to-underlying-storage/>
>> does not mention why the option is not the default. What drawback does
>> the "Dicard After Delete" feature have, since it's not the default?
>>
>
> Simply because in many cases it's not really needed. The whole purpose of
> discarding is to allow the underlying storage to reclaim unused space. But
> usually there's no need for it - you've deleted a disk, but you'd like to
> use this space for a different disk - there's no need to give it back to
> the storage (imagine file deletion in file system).
> It only makes sense when the underlying storage is thin provisioned and
> you need the space.
> Y.
>
>
>>
>> --
>> Regards,
>> Troels Arvin
>>
>> _______________________________________________
>> Users mailing list
>> Users@ovirt.org
>> http://lists.ovirt.org/mailman/listinfo/users
>>
>
>
> _______________________________________________
> Users mailing list
> Users@ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
>
>
_______________________________________________
Users mailing list -- users@ovirt.org
To unsubscribe send an email to users-le...@ovirt.org

Reply via email to