feat(mesh): pull/lease streaming scheduler — Pando StreamLender/Limiter (move 2) - #27
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…er (move 2)
Continues the volunteer-mesh march. Turns synchronous place->dispatch into an opportunistic,
async, churn-tolerant pull model — the thing that actually scales to 400k flaky nodes.
tools/lease_scheduler.py:
- workers LEASE Work Units when idle (pull) -> faster/idler devices pull more (adaptive, no
speed estimation), slow ones pull less (automatic backpressure).
- conservative single-copy: one WU to at most one worker at a time (maximize distinct units in
flight); redundant-quorum is an optional overlay, not the default.
- crash-stop work-stealing: a worker that misses its lease deadline has its unit RE-LENT by
index; a late result from the crashed worker is dropped (re-lent copy is authoritative).
- ordered re-merge (results_in_order); per-worker Limiter (max_in_flight); heartbeat extends a
lease's deadline.
Distilled from Pando (Personal Volunteer Computing in Browsers). Tests: +7 = 129 tools tests green.
docs/VOLUNTEER_MESH.md move 2 -> shipped; work_unit verification is now explicitly the optional
overlay on top of pull/lease dispatch. Makefile `lease`; CapD scheduler link.
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Continues the volunteer-mesh march — turns synchronous
place→dispatchinto an opportunistic, async, churn-tolerant pull model, the thing that actually scales to 400k flaky nodes.tools/lease_scheduler.py:Distilled from Pando. 129 tools tests green.
docs/VOLUNTEER_MESH.mdmove 2 → shipped; verification (#25) is now explicitly the overlay on top of pull/lease dispatch.