[LU-17512] add conditional operator for 'jobid_name'

• Type: Improvement
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.16.0
• Labels: easy lug24dd
• Severity: 3
• Assignee: Max Dilger
• Reporter: Andreas Dilger

Description

It would be useful to add a conditional operator like jobid_name=%j?%H:%e:%u in jobid_interpret_string() to allow using jobid_var if it is set, otherwise use the short hostname.

This allows adding the hostname for interactive jobs that don't have the jobid_var environment variable set (e.g. on login nodes or commands that are run on compute nodes outside of the configured job scheduler), while also not splitting up the job stats for a single 5000-node job into 5000x separate JobIDs to track on the servers for cases where jobid_var is set.

Issue Links

• is related to: LU-17296 NRS TBF default rules
• is related to: LU-14339 Add a option %H to avoid the jobid too long
• is related to: LU-16376 lprocfs_job_stats_log() Invalid jobid size (37), expect(32)
• is related to: LU-10698 Specify complex JobIDs for Lustre
• is related to: LU-12330 Support per-session JOBID without using the environment
• is related to: LU-16766 Combine some kernel process names for jobid