New internal/web/service/probe package keeps probe history in its own
probe.db beside the panel DB (single connection, WAL), so history
writes never contend with the panel write lock.
- Minute rows per hub semantics: a held-reading rhythm books traffic
against each reading own arrival; minute buckets merge (means,
rounded int means, peaks) and the stored net rate derives from the
kernel counters between row marks, falling back to agent rates at
epoch breaks.
- probe_traffic ledger: accumulate is a line port of hub traffic.rs
(baseline alignment, same-boot shrink books 0, epoch change books 0,
unseen-boot exception books the whole counters-since-boot measured
against the master last-seen stamp, per-direction period resets,
saturating adds); reads gate stale day/month stamps to zero.
- probe_meta rows are ensured for every reporting agent (B3 edits
them in place); probe_ping_* tables are created now, written by B4.
- Hourly roll_up behind a watermark (hour-aligned, late grace,
pre-retention hours skipped unfoldered) and watermark-guarded
chunked prune (minute tier 7 days or the retention window when
shorter; hourly tier to retention_days, default 7, cap 365).
- Wiring: heartbeat files probe samples after the snapshot update
(last-seen captured before touch); housekeeping hangs off the
existing robfig/cron in web.startTask (@hourly + one pass a minute
after startup, mirroring the hub boot pass); Server.stop books held
readings. Every failure path logs and degrades - a broken probe.db
never fails a heartbeat or the panel.
Rogue