Hi, I'd like you to take a look at this patch for potential DocImpact. https://review.openstack.org/29343 Log: commit aa3b01ce0ad67d6441a5b3aa2844db9dc7485bdf Author: Alexey Ovchinnikov <aovchinnikov at mirantis.com> Date: Thu May 16 11:52:09 2013 +0400 Implementation of Volume Affinity Filter. This filter allows one to schedule an instance on the same host to which specific volume belongs. Blueprint volume-affinity-filter DocImpact Change-Id: If86acacafb1ba363c31d067fab902d594371dde6 Automatically generated bug (please review): https://bugs.launchpad.net/bugs/1192557