[LU-8055] Further ldev improvements

• Type: Improvement
• Resolution: Fixed
• Priority: Trivial
• Fix Version/s: Lustre 2.9.0
• Labels: llnl patch
• Assignee: Joseph Gmitter (Inactive)
• Reporter: Giuseppe Di Natale (Inactive)

Description

Allow for hostname and backend file system to be used in command substitution. Enable output to be filtered by a server's type/role (i.e. mdt, ost, mgt, mgs). Introduce a new query to return all unique hostnames contained within a file system.