docs: local-disk tiering design note (spike-verified) - #8
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Design note for keeping the agent's working tree and caches on the compute node's /local/job$ID while the shared mirror stays the durable repository: a post-commit hook publishes each commit to the mirror, and a periodic snapshot of the dirty tree lands on refs/sucoder/wip/<name>. Replaces the orphan-prone all-on-/local --local-disk layout. Includes measured filesystem facts (~/mirrors is a Lustre symlink; flock fails only on NFS $HOME), a manual spike on n0036.savio4 that verified every claim (clone 3.5s, commit-to-published 1.15s, snapshot 1.27s, restore byte-identical), and the finding that no deadline watchdog runs for confined jobs because _start_slurm_timer is only reached on the salloc path. Also links persistent-presence.org from the docs index, which was published but unlisted. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01StcQgXQDE4F6eJer1sEXRb
…pdate The docs job failed twice in a row on PR #8 with E: Failed to fetch https://dl.google.com/linux/chrome-stable/deb/dists/stable/main/binary-amd64/Packages.gz Hash Sum mismatch before reaching org-publish. Only emacs-nox from Ubuntu's repos is needed. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01StcQgXQDE4F6eJer1sEXRb
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Design note for a disposable working tree on
/local/job$IDwith the shared mirror as the durable repo and git as the sync (post-commit hook + periodic WIP snapshot onrefs/sucoder/wip/<name>). Spike-verified on n0036.savio4; results table in the note. Also linkspersistent-presence.orgfrom the docs index.Companion finding, to be fixed separately: no deadline watchdog runs for confined jobs (
_start_slurm_timeris only reached via_ensure_slurm_node,cli.py:1130).🤖 Generated with Claude Code
https://claude.ai/code/session_01StcQgXQDE4F6eJer1sEXRb