Add section on recovering disconnected SLURM interactive sessions#322
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Add section on recovering disconnected SLURM interactive sessions#322d-morrison wants to merge 2 commits into
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Document why interactive sessions drop, how to prevent it with a terminal multiplexer, and how to reconnect to a surviving allocation (including the --overlap flag required on SLURM 20.11+). Add references to the srun, salloc, squeue, and sattach documentation. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_0177QtQQ7Ebz4Yg5GAVH7QJp
Replace literal em-dashes with pandoc `---` to satisfy the check-chars workflow, and add "multiplexer" and "reattach" to the spellcheck wordlist. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_0177QtQQ7Ebz4Yg5GAVH7QJp
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Summary
Adds a new "Recovering a disconnected interactive session" section to the HPC/SLURM chapter (
slurm.qmd), documenting what to do when an interactive SLURM session drops.This is a corrected version of advice that circulates online (e.g. AI-generated answers suggesting you can always "reenter" a dropped allocation). The key correction: for a plain interactive
srun --pty/sallocsession, losing the terminal usually tears down the whole allocation, not just the shell — so there is often nothing left to reattach to. The section therefore leads with prevention and is explicit about when recovery is actually possible.What's covered
tmux/screenon the login node, then launch the allocation from inside it so it survives an SSH drop; reattach withtmux attach.squeue --me, then open a new job step withsrun --jobid=<JOBID> --overlap --pty bash.--overlapcaveat — flagged in acallout-important: required since SLURM 20.11, otherwisesrunhangs waiting for resources the running step holds.sattachas the alternative for reattaching to an existing step's I/O, plus acallout-notethat exact behavior is cluster-specific.References
Added
@onlinebib entries tobook.bibfor thesrun,salloc,squeue, andsattachSchedMD documentation pages, cited inline in the new section (matching the existing@slurmsbatch reference).🤖 Generated with Claude Code
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