+ <para>An extended attribute that describes the default stripe pattern
+ for new files created within that directory. This is also inherited by
+ new subdirectories at the time they are created.</para>
+ </glossdef>
+ </glossentry>
+ <glossentry xml:id="DNE" condition='l24'>
+ <glossterm>Distributed namespace (DNE)</glossterm>
+ <glossdef>
+ <para>A collection of metadata targets serving a single file
+ system namespace. Prior to DNE, Lustre file systems were limited to a
+ single metadata target for the entire name space. Without the ability
+ to distribute metadata load over multiple targets, Lustre file system
+ performance is limited. Lustre was enhanced with DNE functionality in
+ two development phases. After completing the first phase of development
+ in Lustre software version 2.4, <emphasis>Remote Directories</emphasis>
+ allows the metadata for sub-directories to be serviced by an
+ independent MDT(s). After completing the second phase of development in
+ Lustre software version 2.8, <emphasis>Striped Directories</emphasis>
+ allows files in a single directory to be serviced by multiple MDTs.
+ </para>