In case you haven't seen it, CA PAM 2.7 has been released. Check it out here: http://www.ca.com/us/support/ca-support-online/product-content/status/announcement-documents/2016/ca-privileged-access-manager-v2-7-general-availability-announcement.aspx. If you prefer, 2.6.3 recently was released as well. It contains the clustering fixes that were also included in 2.7. Please check the Release Notes for both, to see what works best for you.