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docs: rapid-db's daily DLM set is application-consistent through AWS's pre and post script, with a set-age dead-man (dlm-prepost) - #150

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rusholme merged 1 commit into
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dlm-prepost/1-decision
Oct 28, 2026
Merged

rusholme merged 1 commit into
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dlm-prepost/1-decision

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What and why

This PR adds one decisions.md ruling for rapid-db's pre and post script: the design's Records bullet ("a decisions.md line for the pre/post script"). The mechanism is rapid_systems PR 449 (merged f281b19). It deployed on 2026-10-28; the hand pair and the alarm state are in that PR and the brief's t1/.

An operations item, so no runbook PR: the record of the change is rapid_systems' templates and docs, and this ruling.

Files

system/decisions.md (one entry at the head of Rulings).

Divergences

None. The clone-seeding half of the design's Records bullet belongs to restore-drill.

Measurements

What Value
Freeze on rapid-db, hand pair (the document's FROZEN to THAWED stamps) 2.015 s, 07:12:14.569 to 07:12:16.584 UTC
CHECKPOINT in the pre-script 59 ms
Auto-thaw with no post, scratch XFS 60.06 s after the freeze, post exit 203
rapid-db-snapshot-set-age after deploy OK, age 0.78 h (set started 06:24:36 UTC)

Improvements seen

None.

Session notes

None.

What the next task must know

dlm-prepost-check reads the 2026-10-29 scheduled run.

🤖 Generated with Claude Code

…s pre and post script, with a set-age dead-man (dlm-prepost, rapid_systems PR 449)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
@rusholme
rusholme merged commit 1d579b2 into main Oct 28, 2026
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rusholme deleted the dlm-prepost/1-decision branch October 28, 2026 07:27
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