tracks lexicons and how many times they appeared on the jetstream
ptr.pet
1use std::{ops::Deref, time::Duration, u64};
2
3use itertools::Itertools;
4use rclite::Arc;
5use smol_str::ToSmolStr;
6use tokio_util::sync::CancellationToken;
7use tracing::Level;
8use tracing_subscriber::EnvFilter;
9
10use crate::{
11 api::serve,
12 db::{Db, DbConfig, EventRecord},
13 error::AppError,
14 jetstream::JetstreamClient,
15 utils::{CLOCK, RelativeDateTime, get_time},
16};
17
18mod api;
19mod db;
20mod error;
21mod jetstream;
22mod utils;
23
24#[cfg(not(target_env = "msvc"))]
25#[global_allocator]
26static GLOBAL: tikv_jemallocator::Jemalloc = tikv_jemallocator::Jemalloc;
27
28#[cfg(target_env = "msvc")]
29#[global_allocator]
30static ALLOC: snmalloc_rs::SnMalloc = snmalloc_rs::SnMalloc;
31
32#[tokio::main]
33async fn main() {
34 tracing_subscriber::fmt::fmt()
35 .with_env_filter(
36 EnvFilter::builder()
37 .with_default_directive(Level::INFO.into())
38 .from_env_lossy(),
39 )
40 .compact()
41 .init();
42
43 match std::env::args().nth(1).as_deref() {
44 Some("compact") => {
45 compact();
46 return;
47 }
48 Some("migrate") => {
49 migrate();
50 return;
51 }
52 Some("debug") => {
53 debug();
54 return;
55 }
56 Some(x) => {
57 tracing::error!("unknown command: {}", x);
58 return;
59 }
60 None => {}
61 }
62
63 let cancel_token = CancellationToken::new();
64
65 let db = Arc::new(
66 Db::new(DbConfig::default(), cancel_token.child_token()).expect("couldnt create db"),
67 );
68
69 rustls::crypto::ring::default_provider()
70 .install_default()
71 .expect("cant install rustls crypto provider");
72
73 let mut jetstream =
74 match JetstreamClient::new("wss://jetstream2.us-west.bsky.network/subscribe") {
75 Ok(client) => client,
76 Err(err) => {
77 tracing::error!("can't create jetstream client: {err}");
78 return;
79 }
80 };
81
82 let (event_tx, mut event_rx) = tokio::sync::mpsc::channel(1000);
83 let consume_events = tokio::spawn({
84 let consume_cancel = cancel_token.child_token();
85 async move {
86 jetstream.connect().await?;
87 loop {
88 tokio::select! {
89 maybe_event = jetstream.read(consume_cancel.child_token()) => match maybe_event {
90 Ok(event) => {
91 let Some(record) = EventRecord::from_jetstream(event) else {
92 continue;
93 };
94 event_tx.send(record).await?;
95 }
96 Err(err) => return Err(err),
97 },
98 _ = consume_cancel.cancelled() => break Ok(()),
99 }
100 }
101 }
102 });
103
104 let ingest_events = std::thread::spawn({
105 let db = db.clone();
106 move || {
107 let mut buffer = Vec::new();
108 loop {
109 let read = event_rx.blocking_recv_many(&mut buffer, 100);
110 if let Err(err) = db.ingest_events(buffer.drain(..)) {
111 tracing::error!("failed to ingest events: {}", err);
112 }
113 if read == 0 || db.is_shutting_down() {
114 break;
115 }
116 }
117 }
118 });
119
120 let db_task = tokio::task::spawn({
121 let db = db.clone();
122 async move {
123 let sync_period = Duration::from_secs(10);
124 let mut sync_interval = tokio::time::interval(sync_period);
125 sync_interval.set_missed_tick_behavior(tokio::time::MissedTickBehavior::Delay);
126
127 let compact_period = std::time::Duration::from_secs(60 * 30); // 30 mins
128 let mut compact_interval = tokio::time::interval(compact_period);
129 compact_interval.set_missed_tick_behavior(tokio::time::MissedTickBehavior::Delay);
130
131 loop {
132 let sync_db = async || {
133 tokio::task::spawn_blocking({
134 let db = db.clone();
135 move || {
136 if db.is_shutting_down() {
137 return;
138 }
139 match db.sync(false) {
140 Ok(_) => (),
141 Err(e) => tracing::error!("failed to sync db: {}", e),
142 }
143 }
144 })
145 .await
146 .unwrap();
147 };
148 let compact_db = async || {
149 tokio::task::spawn_blocking({
150 let db = db.clone();
151 move || {
152 if db.is_shutting_down() {
153 return;
154 }
155 let end = get_time() - compact_period / 2;
156 let start = end - compact_period;
157 let range = start.as_secs()..end.as_secs();
158 tracing::info!(
159 {
160 start = %RelativeDateTime::from_now(start),
161 end = %RelativeDateTime::from_now(end),
162 },
163 "running compaction...",
164 );
165 match db.compact_all(db.cfg.max_block_size, range, false) {
166 Ok(_) => (),
167 Err(e) => tracing::error!("failed to compact db: {}", e),
168 }
169 }
170 })
171 .await
172 .unwrap();
173 };
174 tokio::select! {
175 _ = sync_interval.tick() => sync_db().await,
176 _ = compact_interval.tick() => compact_db().await,
177 _ = db.shutting_down() => break,
178 }
179 }
180 }
181 });
182
183 tokio::select! {
184 res = serve(db.clone(), cancel_token.child_token()) => {
185 if let Err(e) = res {
186 tracing::error!("serve failed: {}", e);
187 }
188 }
189 res = consume_events => {
190 let err =
191 res
192 .map_err(AppError::from)
193 .and_then(std::convert::identity)
194 .expect_err("consume events cant return ok");
195 tracing::error!("consume events failed: {}", err);
196 },
197 _ = tokio::signal::ctrl_c() => {
198 tracing::info!("received ctrl+c!");
199 cancel_token.cancel();
200 }
201 }
202
203 tracing::info!("shutting down...");
204 cancel_token.cancel();
205 ingest_events.join().expect("failed to join ingest events");
206 db_task.await.expect("cant join db task");
207 db.sync(true).expect("cant sync db");
208}
209
210fn debug() {
211 let db = Db::new(DbConfig::default(), CancellationToken::new()).expect("couldnt create db");
212 let info = db.info().expect("cant get db info");
213 println!("disk size: {}", info.disk_size);
214 for (nsid, blocks) in info.nsids {
215 print!("{nsid}:");
216 let mut last_size = 0;
217 let mut same_size_count = 0;
218 for item_count in blocks {
219 if item_count == last_size {
220 same_size_count += 1;
221 } else {
222 if same_size_count > 1 {
223 print!("x{}", same_size_count);
224 }
225 print!(" {item_count}");
226 same_size_count = 0;
227 }
228 last_size = item_count;
229 }
230 print!("\n");
231 }
232}
233
234fn compact() {
235 let db = Db::new(
236 DbConfig::default().ks(|c| {
237 c.max_journaling_size(u64::MAX)
238 .max_write_buffer_size(u64::MAX)
239 }),
240 CancellationToken::new(),
241 )
242 .expect("couldnt create db");
243 let info = db.info().expect("cant get db info");
244 db.major_compact().expect("cant compact");
245 std::thread::sleep(Duration::from_secs(5));
246 let compacted_info = db.info().expect("cant get db info");
247 println!(
248 "disk size: {} -> {}",
249 info.disk_size, compacted_info.disk_size
250 );
251 for (nsid, blocks) in info.nsids {
252 println!(
253 "{nsid}: {} -> {}",
254 blocks.len(),
255 compacted_info.nsids[&nsid].len()
256 )
257 }
258}
259
260fn migrate() {
261 let cancel_token = CancellationToken::new();
262 let from = Arc::new(
263 Db::new(
264 DbConfig::default().path(".fjall_data_from"),
265 cancel_token.child_token(),
266 )
267 .expect("couldnt create db"),
268 );
269 let to = Arc::new(
270 Db::new(
271 DbConfig::default().path(".fjall_data_to").ks(|c| {
272 c.max_journaling_size(1024 * 1024 * 1024 * 8)
273 .max_write_buffer_size(u64::MAX)
274 .compaction_workers(rayon::current_num_threads() * 2)
275 .flush_workers(rayon::current_num_threads() * 2)
276 }),
277 cancel_token.child_token(),
278 )
279 .expect("couldnt create db"),
280 );
281
282 let nsids = from.get_nsids().collect::<Vec<_>>();
283 let eps_thread = std::thread::spawn({
284 let to = to.clone();
285 move || {
286 loop {
287 std::thread::sleep(Duration::from_secs(3));
288 tracing::info!("{} rps", to.eps());
289 }
290 }
291 });
292 let mut threads = Vec::with_capacity(nsids.len());
293 let start = CLOCK.now();
294 for nsid in nsids {
295 let from = from.clone();
296 let to = to.clone();
297 threads.push(std::thread::spawn(move || {
298 tracing::info!("{}: migrating...", nsid.deref());
299 let mut count = 0_u64;
300 for hits in from.get_hits(&nsid, ..).chunks(100000).into_iter() {
301 to.ingest_events(hits.map(|hit| {
302 count += 1;
303 let hit = hit.expect("cant decode hit");
304 EventRecord {
305 nsid: nsid.to_smolstr(),
306 timestamp: hit.timestamp,
307 deleted: hit.deser().unwrap().deleted,
308 }
309 }))
310 .expect("cant record event");
311 }
312 tracing::info!("{}: ingested {} events...", nsid.deref(), count);
313 count
314 }));
315 }
316 let mut total_count = 0_u64;
317 for thread in threads {
318 let count = thread.join().expect("thread panicked");
319 total_count += count;
320 }
321 let read_time = start.elapsed();
322 let read_per_second = total_count as f64 / read_time.as_secs_f64();
323 drop(from);
324 tracing::info!("starting sync!!!");
325 to.sync(true).expect("cant sync");
326 tracing::info!("persisting...");
327 let total_time = start.elapsed();
328 let write_per_second = total_count as f64 / (total_time - read_time).as_secs_f64();
329 tracing::info!(
330 "migrated {total_count} events in {total_time:?} ({read_per_second:.2} rps, {write_per_second:.2} wps)"
331 );
332}