On Mon, Jul 22, 2013 at 10:18:48PM +0200, Zdenek Kabelac wrote: > It's your backend device used for thinpool data which doesn't > support discard. So it fallbacks to nopassdown behaviour (discard > is processed only at pool level). So, it seems that my backend device(of which I've no idea!!) does not support discard. > > >I'm invoking these commands on a VM. I do not know, from where these > >storage were mapped to my VM(were done my some storage admin). However > > Important piece of puzzle - if you want to see TRIM command hits your storage, > your storage needs to support it ;) > > BTW it's perfectly ok to use thin pool only with nopassdown. > > Zdenek > > > NOTE: issue_discard in lvm.conf is not related in any way with > --discards option for thin pool creation. Hmm. Thank you for your time and answering my queries. !!amit _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
