The new features below were added for the cluster (shared disk) scenario of LVM2 in upstream half year ago. I'm new to LVM2, and have been busy with bugfix things this days. This hackweek gives a good opportunity to do some research on them:

1. System ID

is for static ownership of VGs by hosts: http://man7.org/linux/man-pages/man7/lvmsystemid.7.html

The nearest equivalent to system ID in the past has been configuring lvm.conf filters uniquely on each host.

1. lvmlockd

is for dynamically sharing VGs among hosts: http://man7.org/linux/man-pages/man8/lvmlockd.8.html

Using lvmlockd with dlm is similar to what clvmd has done in the past. Using lvmlockd with sanlock has no prior equivalent.