add flux multi-prog for MPMD support
#6881
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Problem: Flux does not currently support for MPMD (multiple program multiple data) execution for parallel jobs, Add a new command `flux multi-prog` which takes a mandatory config file which maps task rank to program and arguments. This utility is then used as the command and arguments to `flux submit` and/or `flux run`, i.e. $ flux run -N4 flux multi-prog test.conf Fixes flux-framework#2414
Problem: There's no man page for `flux multi-prog`. Add one. Update spelling dictionary.
garlick
approved these changes
Jun 18, 2025
Problem: There are no tests of the `flux multi-prog` utility. Add a new sharness test t2720-python-cli-multi-prog.t for this purpose.
Problem: There are no tab completions for flux-multi-prog(1). Add them.
Codecov ReportAttention: Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## master #6881 +/- ##
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Coverage 83.85% 83.86%
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Files 538 539 +1
Lines 89962 90056 +94
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+ Hits 75440 75521 +81
- Misses 14522 14535 +13
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This PR takes the MPMD workaround script from #2414 and turns it into an official Flux command:
flux multi-prog.This is meant to be used as the command and arguments to
flux runandflux submitfor MPMD support in the near term until more advanced capabilities are added to jobspec. This allows Flux to have this basic capability instead of requiring users to search an issue and copy a workaround script.This PR includes a manpage and tests for the new command.