Background migration of logical volumes (LVs) during operation via MARS is the key for low-cost virtual storage pools on thousands of servers, reducing server hardware and networking costs because no expensive O(n^2) storage network is needed anymore. It also increases reliability for many usage scenarios when compared to similarly sized big storage clusters. First experiences from 1&1 Internet SE, Shared Hosting Linux, are reported.
Thomas Schoebel-Theuer has been working in operating systems since the 1980s, both in academia and in industry. He is an old-school Linux kernel hacker, inventor of the dentry cache for speeding up metadata access to filesystems. Currently he is working in industry on long-distance replication of petabytes of data, and on background migration in big sharding clusters / grids.