Smart policies for data placement and storage tiering of Lustre - Xi Li, Whamcloud
In a massive storage system, it becomes more and more common to see heterogeneous media being used at the same time. Different types of mechanical hard disks, SSDs and NVMe can all be attached as storage media in a single Lustre file system with a unified name-space. These devices have different specifications on the aspects of capacity, latency, bandwidth, reliability, cost and so on. A major challenge to the Lustre file system is how to provide necessary support to the users so as to help them to get the maximum benefit out of the different specifications of the storage media.