edge-node: the edge worker in Rust
tools/edge-bench-rs/src/bin/edge-node.rs: leases ranges, reads the coordinator's framed stream (one thread reads and inflates a frame ahead, libdeflate), indexes with the shared RangeIndexer and posts batches as gzipped JSON in order on a thread of its own (one batch may wait). As commands/edge_node.ts: retries for network trouble and 5xx, 409 = lease lost, a batch once 500k articles or 100k files wait, a chunk that doesn't inflate reported (fetched plain next time), the range given back on SIGTERM/SIGINT, --max-mbit shared by the threads; plus a heartbeat when no batch went out for a minute. One range per thread (--threads, default one per core). End to end against the web server (a.b.models 2017215-4017214 from the capture, spooled): the server stored the same from both workers (38,228 releases with every column, chunks, 481 candidates, rule counts, 57 fragments with their JSON). Rust 9 s / 5.1 CPU-s, TypeScript 17 s. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Daan MeijerandClaude Opus 5.5 committed
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commit
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1 file changed
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//! The edge worker in Rust (REBUILD.md, part 2; commands/edge_node.ts): leases
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//! ranges from the coordinator, reads their XOVER chunks from its stream,
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//! indexes them (the same RangeIndexer as edge-bench-rs, kept identical to
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//! the TypeScript by check.ts) and posts the batches. One range per thread.
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//!
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//! COORDINATOR_URL=… NODE_TOKEN=… edge-node [--threads N] [--batch-articles 500000] [--ranges N] [--max-mbit M]
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//!
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//! SIGTERM/SIGINT: each thread gives its range back after the current chunk
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//! (the next worker resumes at the last stored batch).
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use edge_bench_rs::indexer::{Batch, RangeIndexer};
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use edge_bench_rs::names::Rules;
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use edge_bench_rs::wire;
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use flate2::write::GzEncoder;
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use serde::Deserialize;
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use std::collections::HashMap;
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use std::io::{Read, Write};
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use std::sync::atomic::{AtomicBool, AtomicI64, Ordering};
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use std::sync::mpsc::{sync_channel, Receiver};
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use std::sync::{Arc, Mutex};
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use std::time::{Duration, Instant};
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#[global_allocator]
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static GLOBAL: mimalloc::MiMalloc = mimalloc::MiMalloc;
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/// A batch is posted once this many files (completed, or cut at an edge) wait, whatever its articles (commands/edge_node.ts).
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const MAX_PENDING_FILES: usize = 100_000;
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const RETRIES: u32 = 8;
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const IDLE: Duration = Duration::from_secs(30);
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/// Without a post for this long, the range's lease is kept alive by a heartbeat.
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const HEARTBEAT: Duration = Duration::from_secs(60);
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fn log(level: &str, message: &str) {
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println!("[ {level} ] {message}");
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}
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#[derive(Deserialize)]
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struct LeaseJson {
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range: RangeJson,
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rules: RulesJson,
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}
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#[derive(Deserialize)]
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struct RangeJson {
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id: i64,
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group: String,
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start: i64,
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end: i64,
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next: i64,
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}
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#[derive(Deserialize)]
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#[serde(rename_all = "camelCase")]
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struct RulesJson {
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version: i64,
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priorities: HashMap<String, u32>,
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#[serde(default)]
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dropped_signatures: Vec<String>,
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#[serde(default)]
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dropped_tools: Option<Vec<String>>,
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#[serde(default)]
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per_article_max_parts: Option<u32>,
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#[serde(default)]
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sample_percent: Option<f64>,
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#[serde(default)]
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drop_executables: Option<bool>,
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}
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impl RulesJson {
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fn rules(self) -> Rules {
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let mut rules = Rules::defaults(self.priorities.into_iter().collect());
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rules.version = self.version;
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rules.dropped_signatures = self.dropped_signatures.into_iter().collect();
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if let Some(tools) = self.dropped_tools {
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rules.dropped_tools = tools.into_iter().collect();
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}
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if let Some(n) = self.per_article_max_parts {
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rules.per_article_max_parts = n;
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}
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if let Some(p) = self.sample_percent {
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rules.sample_percent = p;
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}
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if let Some(e) = self.drop_executables {
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rules.drop_executables = e;
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}
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rules
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}
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}
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#[derive(Deserialize)]
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struct StoredJson {
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releases: u64,
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candidates: u64,
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}
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#[derive(Debug)]
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enum ApiError {
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/// 409: the range is no longer this node's (or the batch was stale): stop it, don't give it back.
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LeaseLost(String),
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Other(String),
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}
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impl std::fmt::Display for ApiError {
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fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
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match self {
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ApiError::LeaseLost(m) | ApiError::Other(m) => f.write_str(m),
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}
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}
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}
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/// The coordinator's node API, with retries for network trouble and 5xx (as the TypeScript Api).
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struct Api {
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base: String,
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token: String,
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agent: ureq::Agent,
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}
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impl Api {
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fn new(base: &str, token: &str) -> Self {
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let agent: ureq::Agent = ureq::Agent::config_builder()
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.http_status_as_error(false)
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.timeout_connect(Some(Duration::from_secs(30)))
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.timeout_recv_response(Some(Duration::from_secs(600)))
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.build()
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.into();
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Api { base: base.trim_end_matches('/').to_string(), token: token.to_string(), agent }
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}
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/// A request, retried; `body`: JSON bytes (gzipped when `gzip`).
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fn request(&self, method: &str, path: &str, body: Option<&[u8]>, gzip: bool, accept: &str) -> Result<ureq::http::Response<ureq::Body>, ApiError> {
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let url = format!("{}/api/v1/node/{path}", self.base);
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let auth = format!("Bearer {}", self.token);
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for attempt in 1..=RETRIES {
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let result = match method {
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"GET" => self.agent.get(&url).header("Authorization", &auth).header("Accept", accept).call(),
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_ => {
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let mut request = self.agent.post(&url).header("Authorization", &auth).header("Accept", accept).header("Content-Type", "application/json");
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if gzip {
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request = request.header("Content-Encoding", "gzip");
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}
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request.send(body.unwrap_or(b"{}"))
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}
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};
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match result {
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Ok(mut response) => {
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let status = response.status().as_u16();
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if status == 409 {
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let text = response.body_mut().read_to_string().unwrap_or_default();
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let message = serde_json::from_str::<serde_json::Value>(&text).ok().and_then(|v| v["error"].as_str().map(str::to_string)).unwrap_or_else(|| "lease lost".into());
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return Err(ApiError::LeaseLost(message));
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}
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if status < 500 {
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return Ok(response);
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}
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if attempt == RETRIES {
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return Err(ApiError::Other(format!("{path}: HTTP {status}")));
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}
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}
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Err(error) => {
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if attempt == RETRIES {
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return Err(ApiError::Other(format!("{path}: {error}")));
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}
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}
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}
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std::thread::sleep(Duration::from_millis(60_000.min(1000 * 2u64.pow(attempt))));
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}
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unreachable!()
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}
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fn lease(&self) -> Result<Option<LeaseJson>, ApiError> {
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let mut response = self.request("POST", "lease", None, false, "application/json")?;
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match response.status().as_u16() {
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204 => Ok(None),
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200 => {
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let text = response.body_mut().read_to_string().map_err(|e| ApiError::Other(format!("lease: {e}")))?;
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serde_json::from_str(&text).map(Some).map_err(|e| ApiError::Other(format!("lease: {e}")))
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}
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status => Err(ApiError::Other(format!("lease: HTTP {status}"))),
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}
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}
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fn stream(&self, range: i64) -> Result<Box<dyn Read + Send>, ApiError> {
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let response = self.request("GET", &format!("ranges/{range}/stream"), None, false, "application/octet-stream")?;
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if response.status().as_u16() != 200 {
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return Err(ApiError::Other(format!("stream: HTTP {}", response.status())));
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}
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Ok(Box::new(response.into_body().into_reader()))
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}
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/// Posts a batch (gzipped JSON): the releases and candidates stored, and the bytes posted.
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fn batch(&self, range: i64, batch: &Batch) -> Result<(u64, u64, usize), ApiError> {
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let json = wire::to_json(batch);
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let mut gz = GzEncoder::new(Vec::with_capacity(json.len() / 3), flate2::Compression::new(1));
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gz.write_all(&json).unwrap();
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let body = gz.finish().unwrap();
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let mut response = self.request("POST", &format!("ranges/{range}/batches"), Some(&body), true, "application/json")?;
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if response.status().as_u16() != 200 {
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return Err(ApiError::Other(format!("batch: HTTP {}", response.status())));
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}
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let text = response.body_mut().read_to_string().map_err(|e| ApiError::Other(format!("batch: {e}")))?;
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let stored: StoredJson = serde_json::from_str(&text).map_err(|e| ApiError::Other(format!("batch: {e}")))?;
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Ok((stored.releases, stored.candidates, body.len()))
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}
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fn call(&self, range: i64, action: &str) -> Result<(), ApiError> {
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let response = self.request("POST", &format!("ranges/{range}/{action}"), None, false, "application/json")?;
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match response.status().as_u16() {
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200..=299 => Ok(()),
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status => Err(ApiError::Other(format!("{action}: HTTP {status}"))),
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}
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}
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fn corrupt(&self, range: i64, from: i64) -> Result<(), ApiError> {
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let body = format!("{{\"from\":{from}}}");
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let response = self.request("POST", &format!("ranges/{range}/corrupt"), Some(body.as_bytes()), false, "application/json")?;
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match response.status().as_u16() {
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200..=299 => Ok(()),
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status => Err(ApiError::Other(format!("corrupt: HTTP {status}"))),
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}
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}
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}
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/// One frame of the range's stream: a chunk inflated (or why it didn't), or a keep-alive.
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enum Frame {
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Chunk { from: i64, to: i64, text: Result<Vec<u8>, String> },
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KeepAlive,
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End,
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Failed(String),
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}
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/// Reads frames (8 B from, 8 B to, 4 B length, data) and inflates them, one frame ahead of the indexer.
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fn read_frames(mut stream: Box<dyn Read + Send>, bytes_per_second: Option<f64>) -> Receiver<Frame> {
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let (tx, rx) = sync_channel::<Frame>(2);
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std::thread::spawn(move || {
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let mut decompressor = libdeflater::Decompressor::new();
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let started = Instant::now();
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let mut read_bytes = 0f64;
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loop {
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let mut head = [0u8; 20];
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match read_full(&mut stream, &mut head) {
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Ok(0) => {
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let _ = tx.send(Frame::End);
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return;
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}
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Ok(20) => {}
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Ok(n) => {
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let _ = tx.send(Frame::Failed(format!("stream ended inside a frame ({n} bytes)")));
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return;
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}
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Err(e) => {
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let _ = tx.send(Frame::Failed(format!("stream: {e}")));
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return;
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}
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}
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let from = u64::from_be_bytes(head[0..8].try_into().unwrap()) as i64;
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let to = u64::from_be_bytes(head[8..16].try_into().unwrap()) as i64;
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let length = u32::from_be_bytes(head[16..20].try_into().unwrap()) as usize;
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let mut data = vec![0u8; length];
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match read_full(&mut stream, &mut data) {
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Ok(n) if n == length => {}
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Ok(n) => {
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let _ = tx.send(Frame::Failed(format!("stream ended inside a frame ({} of {length} bytes)", n)));
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return;
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}
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Err(e) => {
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let _ = tx.send(Frame::Failed(format!("stream: {e}")));
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return;
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}
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}
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// --max-mbit: read no faster than the cap (TCP holds the coordinator back).
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if let Some(rate) = bytes_per_second {
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read_bytes += (20 + length) as f64;
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let due = Duration::from_secs_f64(((read_bytes - rate) / rate).max(0.0));
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let elapsed = started.elapsed();
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if due > elapsed {
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std::thread::sleep(due - elapsed);
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}
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}
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let frame = if length == 0 && from == 0 {
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Frame::KeepAlive
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} else {
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Frame::Chunk { from, to, text: inflate(&data, &mut decompressor) }
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};
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if tx.send(frame).is_err() {
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return;
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}
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}
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});
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rx
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}
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/// Reads until `buf` is full or the stream ends: the bytes read.
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fn read_full(stream: &mut dyn Read, buf: &mut [u8]) -> std::io::Result<usize> {
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let mut at = 0;
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while at < buf.len() {
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match stream.read(&mut buf[at..]) {
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Ok(0) => break,
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Ok(n) => at += n,
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Err(e) if e.kind() == std::io::ErrorKind::Interrupted => continue,
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Err(e) => return Err(e),
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}
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}
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Ok(at)
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}
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/// A chunk as the news server sent it (zlib; gzip too), whole.
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fn inflate(raw: &[u8], d: &mut libdeflater::Decompressor) -> Result<Vec<u8>, String> {
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let mut out = vec![0u8; raw.len() * 4 + 4096];
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loop {
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let result = if raw.starts_with(&[0x1f, 0x8b]) { d.gzip_decompress(raw, &mut out) } else { d.zlib_decompress(raw, &mut out) };
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match result {
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Ok(n) => {
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out.truncate(n);
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return Ok(out);
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}
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Err(libdeflater::DecompressionError::InsufficientSpace) => out.resize(out.len() * 2, 0),
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Err(e) => return Err(e.to_string()),
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}
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}
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}
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struct Config {
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batch_articles: i64,
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bytes_per_second: Option<f64>,
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}
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#[derive(Default)]
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struct Totals {
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headers: u64,
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releases: u64,
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candidates: u64,
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bytes: usize,
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post_ms: u128,
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}
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/// One leased range, start to finish (commands/edge_node.ts runRange).
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fn run_range(api: &Arc<Api>, lease: LeaseJson, config: &Config, stopping: &AtomicBool) {
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let range = lease.range;
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let started = Instant::now();
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let mut indexer = RangeIndexer::new(&range.group, range.start, range.end, range.next, lease.rules.rules(), 5);
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let totals = Arc::new(Mutex::new(Totals::default()));
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let post_error: Arc<Mutex<Option<ApiError>>> = Arc::new(Mutex::new(None));
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let last_contact = Arc::new(AtomicI64::new(0));
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let since = Instant::now();
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// Posts in order on their own thread; the indexer goes on meanwhile (one batch may wait).
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let (post_tx, post_rx) = sync_channel::<Batch>(1);
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let poster = {
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let (api, totals, post_error, last_contact) = (api.clone(), totals.clone(), post_error.clone(), last_contact.clone());
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std::thread::spawn(move || {
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for batch in post_rx {
|
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if post_error.lock().unwrap().is_some() {
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continue;
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}
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let at = Instant::now();
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match api.batch(range.id, &batch) {
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Ok((releases, candidates, bytes)) => {
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let mut t = totals.lock().unwrap();
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t.post_ms += at.elapsed().as_millis();
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t.bytes += bytes;
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t.headers += batch.headers;
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t.releases += releases;
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t.candidates += candidates;
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last_contact.store(since.elapsed().as_millis() as i64, Ordering::Relaxed);
|
||||
}
|
||||
Err(e) => *post_error.lock().unwrap() = Some(e),
|
||||
}
|
||||
}
|
||||
})
|
||||
};
|
||||
let frames = match api.stream(range.id) {
|
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Ok(stream) => read_frames(stream, config.bytes_per_second),
|
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Err(e) => {
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log("error", &format!("Range {} failed: {e}; giving it back.", range.id));
|
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let _ = api.call(range.id, "release");
|
||||
return;
|
||||
}
|
||||
};
|
||||
let mut batch_from = range.next;
|
||||
let mut reached_end = false;
|
||||
let mut corrupt: Option<(i64, i64, String)> = None;
|
||||
let mut failure: Option<String> = None;
|
||||
for frame in frames.iter() {
|
||||
if stopping.load(Ordering::Relaxed) || post_error.lock().unwrap().is_some() {
|
||||
break;
|
||||
}
|
||||
// Keep the lease while no batch goes out (slow ranges wait for the spool).
|
||||
if since.elapsed().as_millis() as i64 - last_contact.load(Ordering::Relaxed) > HEARTBEAT.as_millis() as i64 {
|
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last_contact.store(since.elapsed().as_millis() as i64, Ordering::Relaxed);
|
||||
let _ = api.call(range.id, "heartbeat");
|
||||
}
|
||||
match frame {
|
||||
Frame::KeepAlive => continue,
|
||||
Frame::End => break,
|
||||
Frame::Failed(e) => {
|
||||
failure = Some(e);
|
||||
break;
|
||||
}
|
||||
Frame::Chunk { from, to, text } => {
|
||||
let data = match text {
|
||||
Ok(data) => data,
|
||||
Err(e) => {
|
||||
corrupt = Some((from, to, e));
|
||||
break;
|
||||
}
|
||||
};
|
||||
indexer.add_text(&String::from_utf8_lossy(&data), to + 1);
|
||||
reached_end = to >= range.end;
|
||||
if reached_end {
|
||||
indexer.finish();
|
||||
}
|
||||
if reached_end || to + 1 - batch_from >= config.batch_articles || indexer.pending() >= MAX_PENDING_FILES {
|
||||
if post_tx.send(indexer.take()).is_err() {
|
||||
break;
|
||||
}
|
||||
batch_from = to + 1;
|
||||
}
|
||||
if reached_end {
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
drop(post_tx);
|
||||
let _ = poster.join();
|
||||
let post_error = post_error.lock().unwrap().take();
|
||||
if let Some((from, to, e)) = corrupt {
|
||||
// The server's compressed reply cut short: reported, fetched plain next time.
|
||||
log("warn", &format!("Range {}: chunk {from}–{to} doesn't inflate ({e}); reported, the range goes back", range.id));
|
||||
let _ = api.corrupt(range.id, from);
|
||||
return;
|
||||
}
|
||||
match post_error {
|
||||
Some(ApiError::LeaseLost(m)) => {
|
||||
log("warn", &format!("Range {}: {m}", range.id));
|
||||
return;
|
||||
}
|
||||
Some(ApiError::Other(m)) => {
|
||||
log("error", &format!("Range {} failed: {m}; giving it back.", range.id));
|
||||
let _ = api.call(range.id, "release");
|
||||
return;
|
||||
}
|
||||
None => {}
|
||||
}
|
||||
if let Some(e) = failure {
|
||||
log("error", &format!("Range {} failed: {e}; giving it back.", range.id));
|
||||
let _ = api.call(range.id, "release");
|
||||
return;
|
||||
}
|
||||
if !reached_end {
|
||||
log("info", &format!("Range {}: giving it back.", range.id));
|
||||
let _ = api.call(range.id, "release");
|
||||
return;
|
||||
}
|
||||
match api.call(range.id, "finish") {
|
||||
Ok(()) => {
|
||||
let t = totals.lock().unwrap();
|
||||
let seconds = started.elapsed().as_secs_f64();
|
||||
log(
|
||||
"info",
|
||||
&format!(
|
||||
"{} {}–{}: {} headers in {:.0} s ({:.0}/s), {} release chunks, {} probe candidates; posted {:.1} MB in {:.1} s.",
|
||||
range.group,
|
||||
range.start,
|
||||
range.end,
|
||||
t.headers,
|
||||
seconds,
|
||||
t.headers as f64 / seconds,
|
||||
t.releases,
|
||||
t.candidates,
|
||||
t.bytes as f64 / 1e6,
|
||||
t.post_ms as f64 / 1000.0
|
||||
),
|
||||
);
|
||||
}
|
||||
Err(e) => log("warn", &format!("Range {}: {e}", range.id)),
|
||||
}
|
||||
}
|
||||
|
||||
fn main() {
|
||||
let args: Vec<String> = std::env::args().collect();
|
||||
let flag = |name: &str| args.iter().position(|a| a == name).and_then(|i| args.get(i + 1)).cloned();
|
||||
let url = std::env::var("COORDINATOR_URL").expect("COORDINATOR_URL is needed");
|
||||
let token = std::env::var("NODE_TOKEN").expect("NODE_TOKEN is needed");
|
||||
let threads: usize = flag("--threads")
|
||||
.or_else(|| std::env::var("EDGE_PROCESSES").ok())
|
||||
.map(|v| v.parse().unwrap())
|
||||
.filter(|&n| n > 0)
|
||||
.unwrap_or_else(|| std::thread::available_parallelism().map(|n| n.get()).unwrap_or(1));
|
||||
let ranges: Option<usize> = flag("--ranges").map(|v| v.parse().unwrap());
|
||||
let max_mbit: Option<f64> = flag("--max-mbit").or_else(|| std::env::var("EDGE_MAX_MBIT").ok()).map(|v| v.parse().unwrap()).filter(|&m: &f64| m > 0.0);
|
||||
let config = Arc::new(Config {
|
||||
batch_articles: flag("--batch-articles").map(|v| v.parse().unwrap()).unwrap_or(500_000),
|
||||
// The node's cap, shared by its threads.
|
||||
bytes_per_second: max_mbit.map(|m| m * 1e6 / 8.0 / threads as f64),
|
||||
});
|
||||
let stopping = Arc::new(AtomicBool::new(false));
|
||||
signal_hook::flag::register(signal_hook::consts::SIGTERM, stopping.clone()).unwrap();
|
||||
signal_hook::flag::register(signal_hook::consts::SIGINT, stopping.clone()).unwrap();
|
||||
let api = Arc::new(Api::new(&url, &token));
|
||||
log("info", &format!("Starting {threads} worker threads{}.", max_mbit.map(|m| format!(" (download cap {m} Mbit/s)")).unwrap_or_default()));
|
||||
let workers: Vec<_> = (0..threads)
|
||||
.map(|_| {
|
||||
let (api, config, stopping) = (api.clone(), config.clone(), stopping.clone());
|
||||
std::thread::spawn(move || {
|
||||
let mut done = 0;
|
||||
while !stopping.load(Ordering::Relaxed) && ranges.is_none_or(|n| done < n) {
|
||||
match api.lease() {
|
||||
Ok(Some(lease)) => {
|
||||
run_range(&api, lease, &config, &stopping);
|
||||
done += 1;
|
||||
}
|
||||
Ok(None) if ranges.is_some() => break,
|
||||
Ok(None) => idle(&stopping),
|
||||
Err(e) => {
|
||||
log("warn", &format!("Lease failed: {e}"));
|
||||
idle(&stopping);
|
||||
}
|
||||
}
|
||||
}
|
||||
})
|
||||
})
|
||||
.collect();
|
||||
for worker in workers {
|
||||
let _ = worker.join();
|
||||
}
|
||||
}
|
||||
|
||||
fn idle(stopping: &AtomicBool) {
|
||||
let until = Instant::now() + IDLE;
|
||||
while Instant::now() < until && !stopping.load(Ordering::Relaxed) {
|
||||
std::thread::sleep(Duration::from_millis(500));
|
||||
}
|
||||
}
|
||||
Reference in new issue
Block a user