[ovirt-users] Reclaim/Trim/issue_discards : how to inform my LUNs about disk space waste?

[Itamar Heim]

On 07/22/2014 07:21 PM, Nicolas Ecarnot wrote:
> Le 22/07/2014 14:23, Federico Simoncelli a écrit :
>>> In my hosts, I see that /etc/lvm/lvm.conf shows :
>>>
>>> issue_discards = 0
>>>
>>> Can I enable it to 1 ?
>>>
>>> Thank you?
>>
>> You can change it but it's not going to affect the lvm behavior in VDSM
>> since we don't use the host lvm config file.
>>
>> This will be probably addressed as part of bz1017284 as we're considering
>> to extend discard also to vdsm images (and not direct luns only).
>>
>> https://bugzilla.redhat.com/show_bug.cgi?id=1017284
>
> I tried with and without my RH subscription, but I'm not allowd to read
> this bug...
>

fixed, but its currently mostly a place holder titled:

Bug 1017284 - [RFE] Add SCSI discard support for DirectLUN disks sitting 
on a virtio-scsi controller