In addition to bug fixes, NLVM provides the following enhancements and changes in OES 2015:
Two Pool Types: When creating a pool, you can specify the pool type as NSS64 or NSS32. If no type is specified, NLVM defaults to NSS32.
Force Creation in Mixed Cluster: If required as part of upgrading a cluster to OES 2015, you can force the creation of a 64-bit pool in a mixed-node cluster (one that contains pre-OES 2015 servers).
This should only be used as an interim solution because 64-bit NSS pools are not accessible from pre-OES 2015 nodes.
New Display Option: You can display all size outputs in a specified human-readable format, such as KB, MB, GB, and so on using the -p option.