Knowledge Base - Glossary

• MAU
  Minimum Allocatable Unit; the smallest unit of hardware resource that PBS will allocate to a job. On Pleiades, one MAU equals one node. On Endeavour, one MAU equals eight cores. See KB article 271. 
• MDS
  Metadata Server; service nodes of the Lustre filesystems at NAS that manage all metadata operations such as assigning and tracking the names and storage locations of directories and files on the Object Storage Target (OST). See KB article 224. 
• MDT
  Metadata Target; a storage device on the Lustre filesystems at NAS where metadata (name, ownership, permissions, and file type) are stored. See KB article 224.