Checklist for "stable" landing point

[rhc54]

With the project winding down, it is time to define a stable landing point where we can leave it for those wanting to use it. This means:

• removing all stale code, particularly components that aren't actively used
• collapsing frameworks into single code directories where multiple variations are not required (e.g., rtc)
• reducing complexity wherever possible

We'll keep a checklist here as we work thru the process - will culminate in a new PRRTE v4 release series

Code pruning and correction

• Remove "likwid" mapper - never implemented
• Remove "slurm" and "mpich" personalities - never fully implemented nor used
• Collapse "rtc" framework
• Collapse "oob" framework - consolidate the messaging system and refactor it
• Remove "psched" tool - being replaced by external "dynasched" Python project
• Revamp tool system - replace individual tools (e.g., "pterm") with options to "prte" itself to remove conflicts with other packages, need to design this as we must retain "prterun" and "prun" as separate cmds
• Resolve "permanent" solution to the Slurm plm problem - use new launcher lib if it becomes available, otherwise may need to remove envar support for the internal "srun" cmd line options (see also: Slurm integration #1974)

Enhancements

• Add PRRTE-internal resiliency support - recover connections to grandparents when parent connection is lost, restore parent connection if/when parent returns, number collective messages to ensure replay when necessary

Scheduler integration

• Resolve question of moving scheduler integration support into separate branch
• Complete node extension support for adding nodes on-the-fly
• Complete session directive support - e.g., session/job preemption

[naughtont3]

* [ ]  Resolve "permanent" solution to the Slurm plm problem - use new launcher lib _if_ it becomes available, otherwise may need to remove envar support for the internal "srun" cmd line options

Quick follow-up after 3oct2024 teleconf, I was mistaken and the SLURM_VERSION is not exported as an envvar within the allocation. Appears you must go through one of the utilities (e.g., srun --version, scontrol show config | grep SLURM_VERSION).

shell: $ srun --version
slurm 24.05.2
shell: $ scontrol show config | grep SLURM_VERSION
SLURM_VERSION           = 24.05.2
shell: $ echo $SLURM_VERSION

shell: $

[rhc54]

If you just get an allocation (salloc and no srun) is there anything you can see that might give us a hint as to version, even if it doesn't give us a direct value?

[naughtont3]

Unfortunately, i do not see anything that would give an indication (salloc and then env | grep SLURM).