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A Red Hat training course is available for Red Hat Gluster Storage

3.2. No Metadata with the Elastic Hashing Algorithm

Unlike other storage systems with a distributed file system, Red Hat Gluster Storage does not create, store, or use a separate metadata index. Instead, Red Hat Gluster Storage places and locates files algorithmically. All storage node servers in the trusted storage pool can locate any piece of data without looking it up in an index or querying another server. Red Hat Gluster Storage uses an elastic hashing algorithm to locate data in the storage pool, removing a common source of I/O bottlenecks and single point of failure. Data access is fully parallelized and performance scales linearly.