Hi Folks, Recently had a query from someone using an array supporting thin provisioning with zero page reclaim[1]. They wanted a method to write zeros to all the unallocated space in a VG to trigger a reclaim of unused regions in the VG's PVs. My suggestion was to lvcreate a -l100%FREE LV named "filler" and overwrite it from /dev/zero. It seems like this might something a lot of users want as this functionality gets to be more common. I wondered if it could be worth adding a script to automate this or even an option to vgchange (e.g. --zero-free-space)? Didn't have time to try putting anything together yet but it seems such a feature could be useful. Regards, Bryn. [1] http://blogs.hds.com/hu/2009/03/zero-page-reclaim.html _______________________________________________ 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/
