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

[Nicolas Ecarnot]

Le 22/07/2014 14:23, Federico Simoncelli a écrit :
> ----- Original Message -----
>> From: "Nicolas Ecarnot" <nicolas at ecarnot.net>
>> To: "users" <users at ovirt.org>
>> Sent: Thursday, July 3, 2014 10:54:57 AM
>> Subject: [ovirt-users] Reclaim/Trim/issue_discards : how to inform my LUNs about disk space waste?
>>
>> Hi,
>>
>> 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.

Frederico,

May you describe a little more how it's done, explain the principle, or 
point us to a place where we can learn more about how LVM is used in 
oVirt, amongst the manager and the hosts.

Thank you.

>
> 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
>


-- 
Nicolas Ecarnot