Daan MeijerandClaude Fable 5.1
8e008da364
The discard sweep of a dropped signature read the whole pending_releases table per signature (a parallel seq scan over the poster test, four minutes on the HDD that starved the lanes' claims): a partial index on (group_id, tool, poster) WHERE status = 0 makes it a range, and the sweep queries a poster's rows by it and a tool's and group's by the ladder index. The batch store's pending upsert, the record, and the sweep deadlocked on pending_releases and pending_classes rows locked in different orders, and a deadlocked flush dropped its outcomes: lockOrder() sorts every multi-row statement's set the same way, and a flush that deadlocks anyway keeps its outcomes for the next. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
502 lines
20 KiB
TypeScript
502 lines
20 KiB
TypeScript
import db from '@adonisjs/lucid/services/db'
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import type { TransactionClientContract } from '@adonisjs/lucid/types/database'
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import coordinatorConfig from '#config/coordinator'
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import { explored } from '#lib/rules/index'
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import { usableName, type Inspection } from '#lib/probe/index'
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import RuleSets from '#services/rule_sets'
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import { twinKey, twinNames } from '#services/hash_twins'
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/** pending_releases.status (migration 6400). */
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export const PENDING = {
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waiting: 0,
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named: 1,
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discarded: 2,
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exhausted: 3,
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naming: 4,
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taken: 9,
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} as const
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/** The probe targets of a pending release in the order of effort: a par2 names the set's files outright, an archive's start its entries, a lone file only its yEnc name, a 7z's tail is the costliest find. */
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export const EFFORT = ['par2', 'archive', 'lone', '7z-tail'] as const
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export interface PendingTarget {
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kind: string
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messageId: string
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file: string
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/** The target article's bytes (candidates from 2026-11-02 on). */
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bytes?: number
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}
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/** One probe the ladder hands the prober: the next target of a pending release. */
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export interface PendingProbe {
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/** pending_releases.release_key as hex. */
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releaseKey: string
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kind: string
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messageId: string
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file: string
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tool: string
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groupId: number
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/** Its class (lib/release/classes.ts; 0 for a row from before the classes). */
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klass: number
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poster: string
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/** Targets probed before this one. */
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tries: number
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targets: number
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}
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export type PendingOutcome = {
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probe: PendingProbe
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status: 'done' | 'missing' | 'error' | 'waiting'
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inspection?: Inspection
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}
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export function byEffort(targets: PendingTarget[]): PendingTarget[] {
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const rank = (kind: string) => {
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const i = (EFFORT as readonly string[]).indexOf(kind)
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return i < 0 ? EFFORT.length : i
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}
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return [...targets].sort((a, b) => rank(a.kind) - rank(b.kind))
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}
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/** A class's record (pending_classes), for the claim's order. */
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interface ClassRow {
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tool: string
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groupId: number
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klass: number
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probed: number
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named: number
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waiting: number
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}
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/** The record is read again this often. */
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const CLASSES_MS = 60_000
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/** A class found short of a claim's share is left alone this long. */
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const EMPTY_MS = 5 * 60_000
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/**
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* Rows in one order for a statement that locks many of them (pending_releases by key, pending_classes and
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* pending_signatures by theirs): the batch store, the record, the claim and the sweep all lock the same way, so two
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* of them can't deadlock on each other (LOG.md (134)).
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*/
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export function lockOrder<T>(rows: Iterable<T>, key: (row: T) => string): T[] {
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return [...rows].sort((a, b) => {
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const ka = key(a)
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const kb = key(b)
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return ka < kb ? -1 : ka > kb ? 1 : 0
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})
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}
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/** The prior rate of an unexplored class and its weight in probes: the ladder's overall rate on 2026-11-02 (LOG.md (130)). */
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const PRIOR_RATE = 0.15
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const PRIOR_WEIGHT = 10
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/** One class takes at most this share of a claim: the rest explores the classes after it. */
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const CLASS_SHARE = 0.25
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/** The expected naming rate of a class: its record shrunk towards the prior. */
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export function classScore(c: { probed: number; named: number }): number {
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return (c.named + PRIOR_RATE * PRIOR_WEIGHT) / (c.probed + PRIOR_WEIGHT)
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}
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/** An UPDATE returns its rows in no order: the claim's (the cheapest target, then the oldest) restored. */
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function claimed(rows: any[]): any[] {
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const bytes = (r: any) =>
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r.target_bytes === null ? Number.POSITIVE_INFINITY : Number(r.target_bytes)
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return [...rows].sort(
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(a, b) =>
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bytes(a) - bytes(b) ||
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new Date(a.created_at).getTime() - new Date(b.created_at).getTime() ||
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Number(a.first_article) - Number(b.first_article)
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)
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}
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function toProbe(r: any): PendingProbe {
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const targets = byEffort(r.candidates as PendingTarget[])
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const tries = Number(r.tries)
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const target = targets[Math.min(tries, targets.length - 1)]
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return {
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releaseKey: r.release_key,
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kind: target.kind,
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messageId: target.messageId,
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file: target.file,
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tool: r.tool,
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groupId: Number(r.group_id),
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klass: Number(r.klass ?? 0),
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poster: r.poster,
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tries,
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targets: targets.length,
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}
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}
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/**
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* The pending ladder (REBUILD.md decision f): pending_releases probed from least to most effort, a usable name
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* handing the release to the namer (app/services/pending_namer.ts), no name after the last target exhausting it;
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* every finished climb counted on its signature (tool, group, poster; and the tool and group together) and on its
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* class (tool, group, size bucket × name shape × partial; lib/release/classes.ts, LOG.md (130)), and a signature
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* or class with enough probes and next to no names dropped: its waiting releases are discarded without a probe,
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* a sample of them (the rules' samplePercent) still climbing so the rate keeps being measured. The claim takes the
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* classes with the best record first (classScore), the cheapest target first within one.
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*/
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class PendingLadder {
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/** A previous prober's claims back in the queue. */
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async release(): Promise<number> {
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const { rowCount } = await db.rawQuery(
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`UPDATE pending_releases SET status = ? WHERE status = ?`,
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[PENDING.waiting, PENDING.taken]
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)
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return rowCount ?? 0
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}
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/** The ladder's record per class, cached CLASSES_MS between claims, best first; classes found empty, until when. */
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private classes: ClassRow[] = []
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private classesAt = 0
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private empty = new Map<string, number>()
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/** The record read again on the next claim (the tests). */
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forget() {
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this.classesAt = 0
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this.empty.clear()
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}
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/** pending_classes with waiting releases and not dropped, by their expected rate (a prior for the unexplored). */
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private async classRows(): Promise<ClassRow[]> {
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if (Date.now() - this.classesAt < CLASSES_MS) return this.classes
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const { rows } = await db.rawQuery(
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`SELECT tool, group_id, klass, probed, named, waiting FROM pending_classes WHERE waiting > 0 AND NOT dropped`
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)
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this.classes = rows
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.map((r: any) => ({
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tool: r.tool as string,
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groupId: Number(r.group_id),
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klass: Number(r.klass),
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probed: Number(r.probed),
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named: Number(r.named),
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waiting: Number(r.waiting),
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}))
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.sort((a: ClassRow, b: ClassRow) => classScore(b) - classScore(a))
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this.classesAt = Date.now()
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return this.classes
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}
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/**
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* The next target of up to `n` waiting releases with a target left, claimed: by class, the best record first,
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* at most CLASS_SHARE of the claim from one class (the rest explores the classes after it), the cheapest target
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* and then the oldest within one; what the classes don't fill, the oldest of the rest (rows from before the
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* classes, status 0 of a class without a row).
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*/
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async claim(n: number): Promise<PendingProbe[]> {
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if (n <= 0) return []
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const out: PendingProbe[] = []
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const perClass = Math.max(1, Math.floor(n * CLASS_SHARE))
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const now = Date.now()
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for (const c of await this.classRows()) {
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if (out.length >= n) break
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const key = `${c.tool}\t${c.groupId}\t${c.klass}`
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if ((this.empty.get(key) ?? 0) > now) continue
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const want = Math.min(perClass, n - out.length)
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const { rows } = await db.rawQuery(
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`UPDATE pending_releases p SET status = ? FROM (
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SELECT release_key FROM pending_releases
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WHERE status = ? AND tool = ? AND group_id = ? AND klass = ? AND finished AND tries < jsonb_array_length(candidates)
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ORDER BY target_bytes NULLS LAST, created_at, first_article LIMIT ? FOR UPDATE SKIP LOCKED) c
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WHERE p.release_key = c.release_key
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RETURNING encode(p.release_key, 'hex') AS release_key, p.candidates, p.tries, p.tool, p.group_id, p.klass, coalesce(p.poster, '') AS poster, p.target_bytes, p.created_at, p.first_article`,
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[PENDING.taken, PENDING.waiting, c.tool, c.groupId, c.klass, want]
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)
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if (rows.length < want) this.empty.set(key, now + EMPTY_MS)
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if (rows.length > 0) {
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await db.rawQuery(
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`UPDATE pending_classes SET waiting = greatest(0, waiting - ?) WHERE tool = ? AND group_id = ? AND klass = ?`,
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[rows.length, c.tool, c.groupId, c.klass]
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)
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}
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out.push(...claimed(rows).map(toProbe))
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}
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if (out.length < n) {
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const { rows } = await db.rawQuery(
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`UPDATE pending_releases p SET status = ? FROM (
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SELECT release_key FROM pending_releases
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WHERE status = ? AND finished AND tries < jsonb_array_length(candidates)
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ORDER BY created_at, first_article LIMIT ? FOR UPDATE SKIP LOCKED) c
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WHERE p.release_key = c.release_key
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RETURNING encode(p.release_key, 'hex') AS release_key, p.candidates, p.tries, p.tool, p.group_id, p.klass, coalesce(p.poster, '') AS poster, p.target_bytes, p.created_at, p.first_article`,
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[PENDING.taken, PENDING.waiting, n - out.length]
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)
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out.push(...claimed(rows).map(toProbe))
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}
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return out
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}
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/**
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* What the probes showed: a usable name moves the release to the namer (status 4), else the next target, or the
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* end of the ladder (status 3); the finished climbs counted on their signatures.
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*/
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async record(outcomes: PendingOutcome[], trx: TransactionClientContract | typeof db = db) {
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if (outcomes.length === 0) return
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// A twin by content names what the probe itself didn't (hash_twins.ts).
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const twins = await twinNames(
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outcomes
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.filter((o) => o.status === 'done' && o.inspection?.hash16k && o.inspection.size)
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.map((o) => ({ hash16k: o.inspection!.hash16k!, size: o.inspection!.size })),
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trx
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)
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const rows = outcomes.map((o) => {
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const p = o.probe
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if (o.status === 'waiting') {
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return {
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release_key: p.releaseKey,
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status: PENDING.waiting,
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tries: p.tries,
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named: null,
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inspection: null,
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final: null,
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}
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}
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const probed = o.status === 'done' && o.inspection ? usableName(o.inspection, p.kind) : null
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const twin =
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o.status === 'done' && o.inspection?.hash16k
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? twins.get(twinKey(o.inspection.hash16k, o.inspection.size))
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: undefined
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const name = probed ?? twin ?? null
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const tries = p.tries + 1
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const inspection = {
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kind: p.kind,
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status: o.status,
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result: o.inspection ? { ...o.inspection, par2: undefined } : null,
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}
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if (name)
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return {
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release_key: p.releaseKey,
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status: PENDING.naming,
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tries: 0,
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named: name,
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inspection,
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final: 'named',
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}
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if (tries >= p.targets)
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return {
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release_key: p.releaseKey,
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status: PENDING.exhausted,
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tries,
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named: null,
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inspection,
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final: 'exhausted',
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}
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return {
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release_key: p.releaseKey,
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status: PENDING.waiting,
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tries,
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named: null,
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inspection,
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final: null,
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}
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})
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await trx.rawQuery(
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`UPDATE pending_releases p SET status = v.status, tries = v.tries, named = coalesce(v.named, p.named),
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inspections = CASE WHEN v.inspection IS NULL THEN p.inspections ELSE p.inspections || v.inspection END,
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probed_at = CASE WHEN v.inspection IS NULL THEN p.probed_at ELSE now() END
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FROM jsonb_to_recordset(?::jsonb) AS v(release_key text, status int, tries int, named text, inspection jsonb)
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WHERE p.release_key = decode(v.release_key, 'hex')`,
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[
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JSON.stringify(
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lockOrder(
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rows.map(({ final: _final, ...row }) => row),
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(r) => r.release_key
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)
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),
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]
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)
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// The signatures: the poster's own and the tool's and group's together.
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const counts = new Map<
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string,
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{ tool: string; group_id: number; poster: string; probed: number; named: number }
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>()
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for (const [i, o] of outcomes.entries()) {
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const final = rows[i].final
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if (!final) continue
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for (const poster of [o.probe.poster, '']) {
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const key = `${o.probe.tool}\t${o.probe.groupId}\t${poster}`
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const entry = counts.get(key) ?? {
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tool: o.probe.tool,
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group_id: o.probe.groupId,
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poster,
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probed: 0,
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named: 0,
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}
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entry.probed++
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if (final === 'named') entry.named++
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counts.set(key, entry)
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}
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}
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if (counts.size === 0) return
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const { pendingMinProbes, pendingMaxNamed } = coordinatorConfig.probe
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await trx.rawQuery(
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`INSERT INTO pending_signatures (tool, group_id, poster, probed, named)
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SELECT v.tool, v.group_id, v.poster, v.probed, v.named FROM jsonb_to_recordset(?::jsonb) AS v(tool text, group_id int, poster text, probed int, named int)
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ON CONFLICT (tool, group_id, poster) DO UPDATE SET probed = pending_signatures.probed + excluded.probed, named = pending_signatures.named + excluded.named, updated_at = now()`,
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[JSON.stringify(lockOrder(counts.values(), (c) => `${c.tool}\t${c.group_id}\t${c.poster}`))]
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)
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await trx.rawQuery(
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`UPDATE pending_signatures s SET dropped = (s.probed >= ?::int AND s.named::float <= s.probed * ?::float),
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swept_at = CASE WHEN s.dropped THEN s.swept_at END
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FROM jsonb_to_recordset(?::jsonb) AS v(tool text, group_id int, poster text)
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WHERE s.tool = v.tool AND s.group_id = v.group_id AND s.poster = v.poster`,
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[
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pendingMinProbes,
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pendingMaxNamed,
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JSON.stringify(
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lockOrder(counts.values(), (c) => `${c.tool}\t${c.group_id}\t${c.poster}`).map(
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({ tool, group_id, poster }) => ({ tool, group_id, poster })
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)
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),
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]
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)
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// The classes: the same record per (tool, group, class), and a probe given back is waiting again.
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const classes = new Map<
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string,
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{
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tool: string
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group_id: number
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klass: number
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probed: number
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named: number
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waiting: number
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}
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>()
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for (const [i, o] of outcomes.entries()) {
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const key = `${o.probe.tool}\t${o.probe.groupId}\t${o.probe.klass}`
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const entry = classes.get(key) ?? {
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tool: o.probe.tool,
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group_id: o.probe.groupId,
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klass: o.probe.klass,
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probed: 0,
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named: 0,
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waiting: 0,
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}
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const final = rows[i].final
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if (final) entry.probed++
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if (final === 'named') entry.named++
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if (o.status === 'waiting') entry.waiting++
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classes.set(key, entry)
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}
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await trx.rawQuery(
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`INSERT INTO pending_classes (tool, group_id, klass, probed, named, waiting)
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SELECT v.tool, v.group_id, v.klass, v.probed, v.named, v.waiting FROM jsonb_to_recordset(?::jsonb) AS v(tool text, group_id int, klass int, probed int, named int, waiting int)
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ON CONFLICT (tool, group_id, klass) DO UPDATE SET probed = pending_classes.probed + excluded.probed, named = pending_classes.named + excluded.named,
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waiting = pending_classes.waiting + excluded.waiting, updated_at = now()`,
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[JSON.stringify(lockOrder(classes.values(), (c) => `${c.tool}\t${c.group_id}\t${c.klass}`))]
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)
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await trx.rawQuery(
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`UPDATE pending_classes c SET dropped = (c.probed >= ?::int AND c.named::float <= c.probed * ?::float),
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swept_at = CASE WHEN c.dropped THEN c.swept_at END
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FROM jsonb_to_recordset(?::jsonb) AS v(tool text, group_id int, klass int)
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WHERE c.tool = v.tool AND c.group_id = v.group_id AND c.klass = v.klass`,
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[
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pendingMinProbes,
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pendingMaxNamed,
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JSON.stringify(
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lockOrder(classes.values(), (c) => `${c.tool}\t${c.group_id}\t${c.klass}`).map(
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({ tool, group_id, klass }) => ({ tool, group_id, klass })
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)
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),
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]
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)
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}
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/**
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* Waiting releases of a dropped class or signature discarded without a probe, the explored sample excepted; how
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* many. Each dropped class or signature is swept once (swept_at; null again when the record drops it anew),
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* `perSweep` of them at most, each by its index (the claim's for a class, the signature index for a poster's
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* rows, the ladder's for a tool's and group's) in rounds of `limit`. The prober runs this beside the lanes, not
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* in the claim (LOG.md (133)); the edge drops new releases of dropped signatures and classes itself, so one
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* sweep is all a drop needs.
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*/
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async discard(limit = 10_000, perSweep = 20): Promise<number> {
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const { samplePercent } = await RuleSets.current()
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let discarded = 0
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const { rows: classes } = await db.rawQuery(
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`SELECT tool, group_id, klass FROM pending_classes WHERE dropped AND swept_at IS NULL ORDER BY group_id, tool, klass LIMIT ?`,
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[perSweep]
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)
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for (const c of classes) {
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let rows: any[]
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do {
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;({ rows } = await db.rawQuery(
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`SELECT encode(release_key, 'hex') AS release_key FROM pending_releases
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WHERE status = ? AND tool = ? AND group_id = ? AND klass = ? LIMIT ?`,
|
||
[PENDING.waiting, c.tool, c.group_id, c.klass, limit]
|
||
))
|
||
discarded += await this.discardKeys(rows, samplePercent)
|
||
} while (rows.length === limit && rows.some((r) => !explored(r.release_key, samplePercent)))
|
||
await db.rawQuery(
|
||
`UPDATE pending_classes SET swept_at = now() WHERE tool = ? AND group_id = ? AND klass = ?`,
|
||
[c.tool, c.group_id, c.klass]
|
||
)
|
||
}
|
||
const { rows: signatures } = await db.rawQuery(
|
||
`SELECT tool, group_id, poster FROM pending_signatures WHERE dropped AND swept_at IS NULL ORDER BY group_id, tool, poster LIMIT ?`,
|
||
[perSweep]
|
||
)
|
||
for (const s of signatures) {
|
||
let rows: any[]
|
||
do {
|
||
// The poster's rows by the signature index, a tool's and group's by the ladder's: never a test on the rows,
|
||
// which was a scan of the whole table per signature on the HDD (LOG.md (134)).
|
||
;({ rows } =
|
||
s.poster === ''
|
||
? await db.rawQuery(
|
||
`SELECT encode(release_key, 'hex') AS release_key FROM pending_releases
|
||
WHERE status = ? AND group_id = ? AND tool = ? LIMIT ?`,
|
||
[PENDING.waiting, s.group_id, s.tool, limit]
|
||
)
|
||
: await db.rawQuery(
|
||
`SELECT encode(release_key, 'hex') AS release_key FROM pending_releases
|
||
WHERE status = ? AND group_id = ? AND tool = ? AND poster = ? LIMIT ?`,
|
||
[PENDING.waiting, s.group_id, s.tool, s.poster, limit]
|
||
))
|
||
discarded += await this.discardKeys(rows, samplePercent)
|
||
} while (rows.length === limit && rows.some((r) => !explored(r.release_key, samplePercent)))
|
||
await db.rawQuery(
|
||
`UPDATE pending_signatures SET swept_at = now() WHERE tool = ? AND group_id = ? AND poster = ?`,
|
||
[s.tool, s.group_id, s.poster]
|
||
)
|
||
}
|
||
return discarded
|
||
}
|
||
|
||
/** The rows discarded (status 2), the explored sample excepted, their classes' waiting counts lowered; how many. */
|
||
private async discardKeys(rows: any[], samplePercent: number): Promise<number> {
|
||
const keys = rows
|
||
.map((r: any) => r.release_key as string)
|
||
.filter((key: string) => !explored(key, samplePercent))
|
||
.sort()
|
||
if (keys.length === 0) return 0
|
||
const { rows: gone } = await db.rawQuery(
|
||
`UPDATE pending_releases SET status = ? WHERE status = ? AND release_key = ANY(SELECT decode(k, 'hex') FROM unnest(?::text[]) AS k)
|
||
RETURNING tool, group_id, klass`,
|
||
[PENDING.discarded, PENDING.waiting, keys]
|
||
)
|
||
const counts = new Map<string, { tool: string; group_id: number; klass: number; n: number }>()
|
||
for (const g of gone) {
|
||
const key = `${g.tool}\t${g.group_id}\t${g.klass}`
|
||
const entry = counts.get(key) ?? {
|
||
tool: g.tool,
|
||
group_id: Number(g.group_id),
|
||
klass: Number(g.klass),
|
||
n: 0,
|
||
}
|
||
entry.n++
|
||
counts.set(key, entry)
|
||
}
|
||
if (counts.size > 0) {
|
||
await db.rawQuery(
|
||
`UPDATE pending_classes c SET waiting = greatest(0, c.waiting - v.n)
|
||
FROM jsonb_to_recordset(?::jsonb) AS v(tool text, group_id int, klass int, n int)
|
||
WHERE c.tool = v.tool AND c.group_id = v.group_id AND c.klass = v.klass`,
|
||
[JSON.stringify(lockOrder(counts.values(), (c) => `${c.tool}\t${c.group_id}\t${c.klass}`))]
|
||
)
|
||
}
|
||
return gone.length
|
||
}
|
||
}
|
||
|
||
export default new PendingLadder()
|