Line data Source code
1 : //! This module implements Timeline lifecycle management and has all necessary code
2 : //! to glue together SafeKeeper and all other background services.
3 :
4 : use anyhow::{anyhow, bail, Result};
5 : use camino::{Utf8Path, Utf8PathBuf};
6 : use remote_storage::RemotePath;
7 : use safekeeper_api::models::{PeerInfo, TimelineTermBumpResponse};
8 : use safekeeper_api::Term;
9 : use tokio::fs::{self};
10 : use tokio_util::sync::CancellationToken;
11 : use utils::id::TenantId;
12 : use utils::sync::gate::Gate;
13 :
14 : use std::cmp::max;
15 : use std::ops::{Deref, DerefMut};
16 : use std::sync::atomic::{AtomicBool, AtomicU64, Ordering};
17 : use std::sync::Arc;
18 : use std::time::Duration;
19 : use tokio::sync::{RwLock, RwLockReadGuard, RwLockWriteGuard};
20 : use tokio::{sync::watch, time::Instant};
21 : use tracing::*;
22 : use utils::http::error::ApiError;
23 : use utils::{
24 : id::{NodeId, TenantTimelineId},
25 : lsn::Lsn,
26 : };
27 :
28 : use storage_broker::proto::SafekeeperTimelineInfo;
29 : use storage_broker::proto::TenantTimelineId as ProtoTenantTimelineId;
30 :
31 : use crate::control_file;
32 : use crate::rate_limit::RateLimiter;
33 : use crate::receive_wal::WalReceivers;
34 : use crate::safekeeper::{AcceptorProposerMessage, ProposerAcceptorMessage, SafeKeeper, TermLsn};
35 : use crate::send_wal::WalSenders;
36 : use crate::state::{EvictionState, TimelineMemState, TimelinePersistentState, TimelineState};
37 : use crate::timeline_guard::ResidenceGuard;
38 : use crate::timeline_manager::{AtomicStatus, ManagerCtl};
39 : use crate::timelines_set::TimelinesSet;
40 : use crate::wal_backup::{self, remote_timeline_path};
41 : use crate::wal_backup_partial::PartialRemoteSegment;
42 :
43 : use crate::metrics::{FullTimelineInfo, WalStorageMetrics, MISC_OPERATION_SECONDS};
44 : use crate::wal_storage::{Storage as wal_storage_iface, WalReader};
45 : use crate::SafeKeeperConf;
46 : use crate::{debug_dump, timeline_manager, wal_storage};
47 :
48 0 : fn peer_info_from_sk_info(sk_info: &SafekeeperTimelineInfo, ts: Instant) -> PeerInfo {
49 0 : PeerInfo {
50 0 : sk_id: NodeId(sk_info.safekeeper_id),
51 0 : term: sk_info.term,
52 0 : last_log_term: sk_info.last_log_term,
53 0 : flush_lsn: Lsn(sk_info.flush_lsn),
54 0 : commit_lsn: Lsn(sk_info.commit_lsn),
55 0 : local_start_lsn: Lsn(sk_info.local_start_lsn),
56 0 : pg_connstr: sk_info.safekeeper_connstr.clone(),
57 0 : http_connstr: sk_info.http_connstr.clone(),
58 0 : ts,
59 0 : }
60 0 : }
61 :
62 : // vector-based node id -> peer state map with very limited functionality we
63 : // need.
64 : #[derive(Debug, Clone, Default)]
65 : pub struct PeersInfo(pub Vec<PeerInfo>);
66 :
67 : impl PeersInfo {
68 0 : fn get(&mut self, id: NodeId) -> Option<&mut PeerInfo> {
69 0 : self.0.iter_mut().find(|p| p.sk_id == id)
70 0 : }
71 :
72 0 : fn upsert(&mut self, p: &PeerInfo) {
73 0 : match self.get(p.sk_id) {
74 0 : Some(rp) => *rp = p.clone(),
75 0 : None => self.0.push(p.clone()),
76 : }
77 0 : }
78 : }
79 :
80 : pub type ReadGuardSharedState<'a> = RwLockReadGuard<'a, SharedState>;
81 :
82 : /// WriteGuardSharedState is a wrapper around `RwLockWriteGuard<SharedState>` that
83 : /// automatically updates `watch::Sender` channels with state on drop.
84 : pub struct WriteGuardSharedState<'a> {
85 : tli: Arc<Timeline>,
86 : guard: RwLockWriteGuard<'a, SharedState>,
87 : }
88 :
89 : impl<'a> WriteGuardSharedState<'a> {
90 0 : fn new(tli: Arc<Timeline>, guard: RwLockWriteGuard<'a, SharedState>) -> Self {
91 0 : WriteGuardSharedState { tli, guard }
92 0 : }
93 : }
94 :
95 : impl Deref for WriteGuardSharedState<'_> {
96 : type Target = SharedState;
97 :
98 0 : fn deref(&self) -> &Self::Target {
99 0 : &self.guard
100 0 : }
101 : }
102 :
103 : impl DerefMut for WriteGuardSharedState<'_> {
104 0 : fn deref_mut(&mut self) -> &mut Self::Target {
105 0 : &mut self.guard
106 0 : }
107 : }
108 :
109 : impl Drop for WriteGuardSharedState<'_> {
110 0 : fn drop(&mut self) {
111 0 : let term_flush_lsn =
112 0 : TermLsn::from((self.guard.sk.last_log_term(), self.guard.sk.flush_lsn()));
113 0 : let commit_lsn = self.guard.sk.state().inmem.commit_lsn;
114 0 :
115 0 : let _ = self.tli.term_flush_lsn_watch_tx.send_if_modified(|old| {
116 0 : if *old != term_flush_lsn {
117 0 : *old = term_flush_lsn;
118 0 : true
119 : } else {
120 0 : false
121 : }
122 0 : });
123 0 :
124 0 : let _ = self.tli.commit_lsn_watch_tx.send_if_modified(|old| {
125 0 : if *old != commit_lsn {
126 0 : *old = commit_lsn;
127 0 : true
128 : } else {
129 0 : false
130 : }
131 0 : });
132 0 :
133 0 : // send notification about shared state update
134 0 : self.tli.shared_state_version_tx.send_modify(|old| {
135 0 : *old += 1;
136 0 : });
137 0 : }
138 : }
139 :
140 : /// This structure is stored in shared state and represents the state of the timeline.
141 : ///
142 : /// Usually it holds SafeKeeper, but it also supports offloaded timeline state. In this
143 : /// case, SafeKeeper is not available (because WAL is not present on disk) and all
144 : /// operations can be done only with control file.
145 : pub enum StateSK {
146 : Loaded(SafeKeeper<control_file::FileStorage, wal_storage::PhysicalStorage>),
147 : Offloaded(Box<TimelineState<control_file::FileStorage>>),
148 : // Not used, required for moving between states.
149 : Empty,
150 : }
151 :
152 : impl StateSK {
153 0 : pub fn flush_lsn(&self) -> Lsn {
154 0 : match self {
155 0 : StateSK::Loaded(sk) => sk.wal_store.flush_lsn(),
156 0 : StateSK::Offloaded(state) => match state.eviction_state {
157 0 : EvictionState::Offloaded(flush_lsn) => flush_lsn,
158 0 : _ => panic!("StateSK::Offloaded mismatches with eviction_state from control_file"),
159 : },
160 0 : StateSK::Empty => unreachable!(),
161 : }
162 0 : }
163 :
164 : /// Get a reference to the control file's timeline state.
165 0 : pub fn state(&self) -> &TimelineState<control_file::FileStorage> {
166 0 : match self {
167 0 : StateSK::Loaded(sk) => &sk.state,
168 0 : StateSK::Offloaded(ref s) => s,
169 0 : StateSK::Empty => unreachable!(),
170 : }
171 0 : }
172 :
173 0 : pub fn state_mut(&mut self) -> &mut TimelineState<control_file::FileStorage> {
174 0 : match self {
175 0 : StateSK::Loaded(sk) => &mut sk.state,
176 0 : StateSK::Offloaded(ref mut s) => s,
177 0 : StateSK::Empty => unreachable!(),
178 : }
179 0 : }
180 :
181 0 : pub fn last_log_term(&self) -> Term {
182 0 : self.state()
183 0 : .acceptor_state
184 0 : .get_last_log_term(self.flush_lsn())
185 0 : }
186 :
187 0 : pub async fn term_bump(&mut self, to: Option<Term>) -> Result<TimelineTermBumpResponse> {
188 0 : self.state_mut().term_bump(to).await
189 0 : }
190 :
191 : /// Close open WAL files to release FDs.
192 0 : fn close_wal_store(&mut self) {
193 0 : if let StateSK::Loaded(sk) = self {
194 0 : sk.wal_store.close();
195 0 : }
196 0 : }
197 :
198 : /// Update timeline state with peer safekeeper data.
199 0 : pub async fn record_safekeeper_info(&mut self, sk_info: &SafekeeperTimelineInfo) -> Result<()> {
200 0 : // update commit_lsn if safekeeper is loaded
201 0 : match self {
202 0 : StateSK::Loaded(sk) => sk.record_safekeeper_info(sk_info).await?,
203 0 : StateSK::Offloaded(_) => {}
204 0 : StateSK::Empty => unreachable!(),
205 : }
206 :
207 : // update everything else, including remote_consistent_lsn and backup_lsn
208 0 : let mut sync_control_file = false;
209 0 : let state = self.state_mut();
210 0 : let wal_seg_size = state.server.wal_seg_size as u64;
211 0 :
212 0 : state.inmem.backup_lsn = max(Lsn(sk_info.backup_lsn), state.inmem.backup_lsn);
213 0 : sync_control_file |= state.backup_lsn + wal_seg_size < state.inmem.backup_lsn;
214 0 :
215 0 : state.inmem.remote_consistent_lsn = max(
216 0 : Lsn(sk_info.remote_consistent_lsn),
217 0 : state.inmem.remote_consistent_lsn,
218 0 : );
219 0 : sync_control_file |=
220 0 : state.remote_consistent_lsn + wal_seg_size < state.inmem.remote_consistent_lsn;
221 0 :
222 0 : state.inmem.peer_horizon_lsn =
223 0 : max(Lsn(sk_info.peer_horizon_lsn), state.inmem.peer_horizon_lsn);
224 0 : sync_control_file |= state.peer_horizon_lsn + wal_seg_size < state.inmem.peer_horizon_lsn;
225 0 :
226 0 : if sync_control_file {
227 0 : state.flush().await?;
228 0 : }
229 0 : Ok(())
230 0 : }
231 :
232 : /// Previously known as epoch_start_lsn. Needed only for reference in some APIs.
233 0 : pub fn term_start_lsn(&self) -> Lsn {
234 0 : match self {
235 0 : StateSK::Loaded(sk) => sk.term_start_lsn,
236 0 : StateSK::Offloaded(_) => Lsn(0),
237 0 : StateSK::Empty => unreachable!(),
238 : }
239 0 : }
240 :
241 : /// Used for metrics only.
242 0 : pub fn wal_storage_metrics(&self) -> WalStorageMetrics {
243 0 : match self {
244 0 : StateSK::Loaded(sk) => sk.wal_store.get_metrics(),
245 0 : StateSK::Offloaded(_) => WalStorageMetrics::default(),
246 0 : StateSK::Empty => unreachable!(),
247 : }
248 0 : }
249 :
250 : /// Returns WAL storage internal LSNs for debug dump.
251 0 : pub fn wal_storage_internal_state(&self) -> (Lsn, Lsn, Lsn, bool) {
252 0 : match self {
253 0 : StateSK::Loaded(sk) => sk.wal_store.internal_state(),
254 : StateSK::Offloaded(_) => {
255 0 : let flush_lsn = self.flush_lsn();
256 0 : (flush_lsn, flush_lsn, flush_lsn, false)
257 : }
258 0 : StateSK::Empty => unreachable!(),
259 : }
260 0 : }
261 :
262 : /// Access to SafeKeeper object. Panics if offloaded, should be good to use from WalResidentTimeline.
263 0 : pub fn safekeeper(
264 0 : &mut self,
265 0 : ) -> &mut SafeKeeper<control_file::FileStorage, wal_storage::PhysicalStorage> {
266 0 : match self {
267 0 : StateSK::Loaded(sk) => sk,
268 : StateSK::Offloaded(_) => {
269 0 : panic!("safekeeper is offloaded, cannot be used")
270 : }
271 0 : StateSK::Empty => unreachable!(),
272 : }
273 0 : }
274 :
275 : /// Moves control file's state structure out of the enum. Used to switch states.
276 0 : fn take_state(self) -> TimelineState<control_file::FileStorage> {
277 0 : match self {
278 0 : StateSK::Loaded(sk) => sk.state,
279 0 : StateSK::Offloaded(state) => *state,
280 0 : StateSK::Empty => unreachable!(),
281 : }
282 0 : }
283 : }
284 :
285 : /// Shared state associated with database instance
286 : pub struct SharedState {
287 : /// Safekeeper object
288 : pub(crate) sk: StateSK,
289 : /// In memory list containing state of peers sent in latest messages from them.
290 : pub(crate) peers_info: PeersInfo,
291 : // True value hinders old WAL removal; this is used by snapshotting. We
292 : // could make it a counter, but there is no need to.
293 : pub(crate) wal_removal_on_hold: bool,
294 : }
295 :
296 : impl SharedState {
297 : /// Creates a new SharedState.
298 0 : pub fn new(sk: StateSK) -> Self {
299 0 : Self {
300 0 : sk,
301 0 : peers_info: PeersInfo(vec![]),
302 0 : wal_removal_on_hold: false,
303 0 : }
304 0 : }
305 :
306 : /// Restore SharedState from control file. If file doesn't exist, bails out.
307 0 : pub fn restore(conf: &SafeKeeperConf, ttid: &TenantTimelineId) -> Result<Self> {
308 0 : let timeline_dir = get_timeline_dir(conf, ttid);
309 0 : let control_store = control_file::FileStorage::restore_new(&timeline_dir, conf.no_sync)?;
310 0 : if control_store.server.wal_seg_size == 0 {
311 0 : bail!(TimelineError::UninitializedWalSegSize(*ttid));
312 0 : }
313 :
314 0 : let sk = match control_store.eviction_state {
315 : EvictionState::Present => {
316 0 : let wal_store = wal_storage::PhysicalStorage::new(
317 0 : ttid,
318 0 : &timeline_dir,
319 0 : &control_store,
320 0 : conf.no_sync,
321 0 : )?;
322 0 : StateSK::Loaded(SafeKeeper::new(
323 0 : TimelineState::new(control_store),
324 0 : wal_store,
325 0 : conf.my_id,
326 0 : )?)
327 : }
328 : EvictionState::Offloaded(_) => {
329 0 : StateSK::Offloaded(Box::new(TimelineState::new(control_store)))
330 : }
331 : };
332 :
333 0 : Ok(Self::new(sk))
334 0 : }
335 :
336 0 : pub(crate) fn get_wal_seg_size(&self) -> usize {
337 0 : self.sk.state().server.wal_seg_size as usize
338 0 : }
339 :
340 0 : fn get_safekeeper_info(
341 0 : &self,
342 0 : ttid: &TenantTimelineId,
343 0 : conf: &SafeKeeperConf,
344 0 : standby_apply_lsn: Lsn,
345 0 : ) -> SafekeeperTimelineInfo {
346 0 : SafekeeperTimelineInfo {
347 0 : safekeeper_id: conf.my_id.0,
348 0 : tenant_timeline_id: Some(ProtoTenantTimelineId {
349 0 : tenant_id: ttid.tenant_id.as_ref().to_owned(),
350 0 : timeline_id: ttid.timeline_id.as_ref().to_owned(),
351 0 : }),
352 0 : term: self.sk.state().acceptor_state.term,
353 0 : last_log_term: self.sk.last_log_term(),
354 0 : flush_lsn: self.sk.flush_lsn().0,
355 0 : // note: this value is not flushed to control file yet and can be lost
356 0 : commit_lsn: self.sk.state().inmem.commit_lsn.0,
357 0 : remote_consistent_lsn: self.sk.state().inmem.remote_consistent_lsn.0,
358 0 : peer_horizon_lsn: self.sk.state().inmem.peer_horizon_lsn.0,
359 0 : safekeeper_connstr: conf
360 0 : .advertise_pg_addr
361 0 : .to_owned()
362 0 : .unwrap_or(conf.listen_pg_addr.clone()),
363 0 : http_connstr: conf.listen_http_addr.to_owned(),
364 0 : backup_lsn: self.sk.state().inmem.backup_lsn.0,
365 0 : local_start_lsn: self.sk.state().local_start_lsn.0,
366 0 : availability_zone: conf.availability_zone.clone(),
367 0 : standby_horizon: standby_apply_lsn.0,
368 0 : }
369 0 : }
370 :
371 : /// Get our latest view of alive peers status on the timeline.
372 : /// We pass our own info through the broker as well, so when we don't have connection
373 : /// to the broker returned vec is empty.
374 0 : pub(crate) fn get_peers(&self, heartbeat_timeout: Duration) -> Vec<PeerInfo> {
375 0 : let now = Instant::now();
376 0 : self.peers_info
377 0 : .0
378 0 : .iter()
379 0 : // Regard peer as absent if we haven't heard from it within heartbeat_timeout.
380 0 : .filter(|p| now.duration_since(p.ts) <= heartbeat_timeout)
381 0 : .cloned()
382 0 : .collect()
383 0 : }
384 : }
385 :
386 : #[derive(Debug, thiserror::Error)]
387 : pub enum TimelineError {
388 : #[error("Timeline {0} was cancelled and cannot be used anymore")]
389 : Cancelled(TenantTimelineId),
390 : #[error("Timeline {0} was not found in global map")]
391 : NotFound(TenantTimelineId),
392 : #[error("Timeline {0} creation is in progress")]
393 : CreationInProgress(TenantTimelineId),
394 : #[error("Timeline {0} exists on disk, but wasn't loaded on startup")]
395 : Invalid(TenantTimelineId),
396 : #[error("Timeline {0} is already exists")]
397 : AlreadyExists(TenantTimelineId),
398 : #[error("Timeline {0} is not initialized, wal_seg_size is zero")]
399 : UninitializedWalSegSize(TenantTimelineId),
400 : #[error("Timeline {0} is not initialized, pg_version is unknown")]
401 : UninitialinzedPgVersion(TenantTimelineId),
402 : }
403 :
404 : // Convert to HTTP API error.
405 : impl From<TimelineError> for ApiError {
406 0 : fn from(te: TimelineError) -> ApiError {
407 0 : match te {
408 0 : TimelineError::NotFound(ttid) => {
409 0 : ApiError::NotFound(anyhow!("timeline {} not found", ttid).into())
410 : }
411 0 : _ => ApiError::InternalServerError(anyhow!("{}", te)),
412 : }
413 0 : }
414 : }
415 :
416 : /// Timeline struct manages lifecycle (creation, deletion, restore) of a safekeeper timeline.
417 : /// It also holds SharedState and provides mutually exclusive access to it.
418 : pub struct Timeline {
419 : pub ttid: TenantTimelineId,
420 : pub remote_path: RemotePath,
421 :
422 : /// Used to broadcast commit_lsn updates to all background jobs.
423 : commit_lsn_watch_tx: watch::Sender<Lsn>,
424 : commit_lsn_watch_rx: watch::Receiver<Lsn>,
425 :
426 : /// Broadcasts (current term, flush_lsn) updates, walsender is interested in
427 : /// them when sending in recovery mode (to walproposer or peers). Note: this
428 : /// is just a notification, WAL reading should always done with lock held as
429 : /// term can change otherwise.
430 : term_flush_lsn_watch_tx: watch::Sender<TermLsn>,
431 : term_flush_lsn_watch_rx: watch::Receiver<TermLsn>,
432 :
433 : /// Broadcasts shared state updates.
434 : shared_state_version_tx: watch::Sender<usize>,
435 : shared_state_version_rx: watch::Receiver<usize>,
436 :
437 : /// Safekeeper and other state, that should remain consistent and
438 : /// synchronized with the disk. This is tokio mutex as we write WAL to disk
439 : /// while holding it, ensuring that consensus checks are in order.
440 : mutex: RwLock<SharedState>,
441 : walsenders: Arc<WalSenders>,
442 : walreceivers: Arc<WalReceivers>,
443 : timeline_dir: Utf8PathBuf,
444 : manager_ctl: ManagerCtl,
445 : conf: Arc<SafeKeeperConf>,
446 :
447 : /// Hold this gate from code that depends on the Timeline's non-shut-down state. While holding
448 : /// this gate, you must respect [`Timeline::cancel`]
449 : pub(crate) gate: Gate,
450 :
451 : /// Delete/cancel will trigger this, background tasks should drop out as soon as it fires
452 : pub(crate) cancel: CancellationToken,
453 :
454 : // timeline_manager controlled state
455 : pub(crate) broker_active: AtomicBool,
456 : pub(crate) wal_backup_active: AtomicBool,
457 : pub(crate) last_removed_segno: AtomicU64,
458 : pub(crate) mgr_status: AtomicStatus,
459 : }
460 :
461 : impl Timeline {
462 : /// Constructs a new timeline.
463 0 : pub fn new(
464 0 : ttid: TenantTimelineId,
465 0 : timeline_dir: &Utf8Path,
466 0 : remote_path: &RemotePath,
467 0 : shared_state: SharedState,
468 0 : conf: Arc<SafeKeeperConf>,
469 0 : ) -> Arc<Self> {
470 0 : let (commit_lsn_watch_tx, commit_lsn_watch_rx) =
471 0 : watch::channel(shared_state.sk.state().commit_lsn);
472 0 : let (term_flush_lsn_watch_tx, term_flush_lsn_watch_rx) = watch::channel(TermLsn::from((
473 0 : shared_state.sk.last_log_term(),
474 0 : shared_state.sk.flush_lsn(),
475 0 : )));
476 0 : let (shared_state_version_tx, shared_state_version_rx) = watch::channel(0);
477 0 :
478 0 : let walreceivers = WalReceivers::new();
479 0 :
480 0 : Arc::new(Self {
481 0 : ttid,
482 0 : remote_path: remote_path.to_owned(),
483 0 : timeline_dir: timeline_dir.to_owned(),
484 0 : commit_lsn_watch_tx,
485 0 : commit_lsn_watch_rx,
486 0 : term_flush_lsn_watch_tx,
487 0 : term_flush_lsn_watch_rx,
488 0 : shared_state_version_tx,
489 0 : shared_state_version_rx,
490 0 : mutex: RwLock::new(shared_state),
491 0 : walsenders: WalSenders::new(walreceivers.clone()),
492 0 : walreceivers,
493 0 : gate: Default::default(),
494 0 : cancel: CancellationToken::default(),
495 0 : manager_ctl: ManagerCtl::new(),
496 0 : conf,
497 0 : broker_active: AtomicBool::new(false),
498 0 : wal_backup_active: AtomicBool::new(false),
499 0 : last_removed_segno: AtomicU64::new(0),
500 0 : mgr_status: AtomicStatus::new(),
501 0 : })
502 0 : }
503 :
504 : /// Load existing timeline from disk.
505 0 : pub fn load_timeline(
506 0 : conf: Arc<SafeKeeperConf>,
507 0 : ttid: TenantTimelineId,
508 0 : ) -> Result<Arc<Timeline>> {
509 0 : let _enter = info_span!("load_timeline", timeline = %ttid.timeline_id).entered();
510 :
511 0 : let shared_state = SharedState::restore(conf.as_ref(), &ttid)?;
512 0 : let timeline_dir = get_timeline_dir(conf.as_ref(), &ttid);
513 0 : let remote_path = remote_timeline_path(&ttid)?;
514 :
515 0 : Ok(Timeline::new(
516 0 : ttid,
517 0 : &timeline_dir,
518 0 : &remote_path,
519 0 : shared_state,
520 0 : conf,
521 0 : ))
522 0 : }
523 :
524 : /// Bootstrap new or existing timeline starting background tasks.
525 0 : pub fn bootstrap(
526 0 : self: &Arc<Timeline>,
527 0 : _shared_state: &mut WriteGuardSharedState<'_>,
528 0 : conf: &SafeKeeperConf,
529 0 : broker_active_set: Arc<TimelinesSet>,
530 0 : partial_backup_rate_limiter: RateLimiter,
531 0 : ) {
532 0 : let (tx, rx) = self.manager_ctl.bootstrap_manager();
533 :
534 0 : let Ok(gate_guard) = self.gate.enter() else {
535 : // Init raced with shutdown
536 0 : return;
537 : };
538 :
539 : // Start manager task which will monitor timeline state and update
540 : // background tasks.
541 0 : tokio::spawn({
542 0 : let this = self.clone();
543 0 : let conf = conf.clone();
544 0 : async move {
545 0 : let _gate_guard = gate_guard;
546 0 : timeline_manager::main_task(
547 0 : ManagerTimeline { tli: this },
548 0 : conf,
549 0 : broker_active_set,
550 0 : tx,
551 0 : rx,
552 0 : partial_backup_rate_limiter,
553 0 : )
554 0 : .await
555 0 : }
556 0 : });
557 0 : }
558 :
559 : /// Background timeline activities (which hold Timeline::gate) will no
560 : /// longer run once this function completes.
561 0 : pub async fn shutdown(&self) {
562 0 : info!("timeline {} shutting down", self.ttid);
563 0 : self.cancel.cancel();
564 0 :
565 0 : // Wait for any concurrent tasks to stop using this timeline, to avoid e.g. attempts
566 0 : // to read deleted files.
567 0 : self.gate.close().await;
568 0 : }
569 :
570 : /// Delete timeline from disk completely, by removing timeline directory.
571 : ///
572 : /// Also deletes WAL in s3. Might fail if e.g. s3 is unavailable, but
573 : /// deletion API endpoint is retriable.
574 : ///
575 : /// Timeline must be in shut-down state (i.e. call [`Self::shutdown`] first)
576 0 : pub async fn delete(
577 0 : &self,
578 0 : shared_state: &mut WriteGuardSharedState<'_>,
579 0 : only_local: bool,
580 0 : ) -> Result<bool> {
581 0 : // Assert that [`Self::shutdown`] was already called
582 0 : assert!(self.cancel.is_cancelled());
583 0 : assert!(self.gate.close_complete());
584 :
585 : // Close associated FDs. Nobody will be able to touch timeline data once
586 : // it is cancelled, so WAL storage won't be opened again.
587 0 : shared_state.sk.close_wal_store();
588 0 :
589 0 : if !only_local && self.conf.is_wal_backup_enabled() {
590 : // Note: we concurrently delete remote storage data from multiple
591 : // safekeepers. That's ok, s3 replies 200 if object doesn't exist and we
592 : // do some retries anyway.
593 0 : wal_backup::delete_timeline(&self.ttid).await?;
594 0 : }
595 0 : let dir_existed = delete_dir(&self.timeline_dir).await?;
596 0 : Ok(dir_existed)
597 0 : }
598 :
599 : /// Returns if timeline is cancelled.
600 0 : pub fn is_cancelled(&self) -> bool {
601 0 : self.cancel.is_cancelled()
602 0 : }
603 :
604 : /// Take a writing mutual exclusive lock on timeline shared_state.
605 0 : pub async fn write_shared_state<'a>(self: &'a Arc<Self>) -> WriteGuardSharedState<'a> {
606 0 : WriteGuardSharedState::new(self.clone(), self.mutex.write().await)
607 0 : }
608 :
609 0 : pub async fn read_shared_state(&self) -> ReadGuardSharedState {
610 0 : self.mutex.read().await
611 0 : }
612 :
613 : /// Returns commit_lsn watch channel.
614 0 : pub fn get_commit_lsn_watch_rx(&self) -> watch::Receiver<Lsn> {
615 0 : self.commit_lsn_watch_rx.clone()
616 0 : }
617 :
618 : /// Returns term_flush_lsn watch channel.
619 0 : pub fn get_term_flush_lsn_watch_rx(&self) -> watch::Receiver<TermLsn> {
620 0 : self.term_flush_lsn_watch_rx.clone()
621 0 : }
622 :
623 : /// Returns watch channel for SharedState update version.
624 0 : pub fn get_state_version_rx(&self) -> watch::Receiver<usize> {
625 0 : self.shared_state_version_rx.clone()
626 0 : }
627 :
628 : /// Returns wal_seg_size.
629 0 : pub async fn get_wal_seg_size(&self) -> usize {
630 0 : self.read_shared_state().await.get_wal_seg_size()
631 0 : }
632 :
633 : /// Returns state of the timeline.
634 0 : pub async fn get_state(&self) -> (TimelineMemState, TimelinePersistentState) {
635 0 : let state = self.read_shared_state().await;
636 0 : (
637 0 : state.sk.state().inmem.clone(),
638 0 : TimelinePersistentState::clone(state.sk.state()),
639 0 : )
640 0 : }
641 :
642 : /// Returns latest backup_lsn.
643 0 : pub async fn get_wal_backup_lsn(&self) -> Lsn {
644 0 : self.read_shared_state().await.sk.state().inmem.backup_lsn
645 0 : }
646 :
647 : /// Sets backup_lsn to the given value.
648 0 : pub async fn set_wal_backup_lsn(self: &Arc<Self>, backup_lsn: Lsn) -> Result<()> {
649 0 : if self.is_cancelled() {
650 0 : bail!(TimelineError::Cancelled(self.ttid));
651 0 : }
652 :
653 0 : let mut state = self.write_shared_state().await;
654 0 : state.sk.state_mut().inmem.backup_lsn = max(state.sk.state().inmem.backup_lsn, backup_lsn);
655 0 : // we should check whether to shut down offloader, but this will be done
656 0 : // soon by peer communication anyway.
657 0 : Ok(())
658 0 : }
659 :
660 : /// Get safekeeper info for broadcasting to broker and other peers.
661 0 : pub async fn get_safekeeper_info(&self, conf: &SafeKeeperConf) -> SafekeeperTimelineInfo {
662 0 : let standby_apply_lsn = self.walsenders.get_hotstandby().reply.apply_lsn;
663 0 : let shared_state = self.read_shared_state().await;
664 0 : shared_state.get_safekeeper_info(&self.ttid, conf, standby_apply_lsn)
665 0 : }
666 :
667 : /// Update timeline state with peer safekeeper data.
668 0 : pub async fn record_safekeeper_info(
669 0 : self: &Arc<Self>,
670 0 : sk_info: SafekeeperTimelineInfo,
671 0 : ) -> Result<()> {
672 : {
673 0 : let mut shared_state = self.write_shared_state().await;
674 0 : shared_state.sk.record_safekeeper_info(&sk_info).await?;
675 0 : let peer_info = peer_info_from_sk_info(&sk_info, Instant::now());
676 0 : shared_state.peers_info.upsert(&peer_info);
677 0 : }
678 0 : Ok(())
679 0 : }
680 :
681 0 : pub async fn get_peers(&self, conf: &SafeKeeperConf) -> Vec<PeerInfo> {
682 0 : let shared_state = self.read_shared_state().await;
683 0 : shared_state.get_peers(conf.heartbeat_timeout)
684 0 : }
685 :
686 0 : pub fn get_walsenders(&self) -> &Arc<WalSenders> {
687 0 : &self.walsenders
688 0 : }
689 :
690 0 : pub fn get_walreceivers(&self) -> &Arc<WalReceivers> {
691 0 : &self.walreceivers
692 0 : }
693 :
694 : /// Returns flush_lsn.
695 0 : pub async fn get_flush_lsn(&self) -> Lsn {
696 0 : self.read_shared_state().await.sk.flush_lsn()
697 0 : }
698 :
699 : /// Gather timeline data for metrics.
700 0 : pub async fn info_for_metrics(&self) -> Option<FullTimelineInfo> {
701 0 : if self.is_cancelled() {
702 0 : return None;
703 0 : }
704 0 :
705 0 : let (ps_feedback_count, last_ps_feedback) = self.walsenders.get_ps_feedback_stats();
706 0 : let state = self.read_shared_state().await;
707 0 : Some(FullTimelineInfo {
708 0 : ttid: self.ttid,
709 0 : ps_feedback_count,
710 0 : last_ps_feedback,
711 0 : wal_backup_active: self.wal_backup_active.load(Ordering::Relaxed),
712 0 : timeline_is_active: self.broker_active.load(Ordering::Relaxed),
713 0 : num_computes: self.walreceivers.get_num() as u32,
714 0 : last_removed_segno: self.last_removed_segno.load(Ordering::Relaxed),
715 0 : epoch_start_lsn: state.sk.term_start_lsn(),
716 0 : mem_state: state.sk.state().inmem.clone(),
717 0 : persisted_state: TimelinePersistentState::clone(state.sk.state()),
718 0 : flush_lsn: state.sk.flush_lsn(),
719 0 : wal_storage: state.sk.wal_storage_metrics(),
720 0 : })
721 0 : }
722 :
723 : /// Returns in-memory timeline state to build a full debug dump.
724 0 : pub async fn memory_dump(&self) -> debug_dump::Memory {
725 0 : let state = self.read_shared_state().await;
726 :
727 0 : let (write_lsn, write_record_lsn, flush_lsn, file_open) =
728 0 : state.sk.wal_storage_internal_state();
729 0 :
730 0 : debug_dump::Memory {
731 0 : is_cancelled: self.is_cancelled(),
732 0 : peers_info_len: state.peers_info.0.len(),
733 0 : walsenders: self.walsenders.get_all(),
734 0 : wal_backup_active: self.wal_backup_active.load(Ordering::Relaxed),
735 0 : active: self.broker_active.load(Ordering::Relaxed),
736 0 : num_computes: self.walreceivers.get_num() as u32,
737 0 : last_removed_segno: self.last_removed_segno.load(Ordering::Relaxed),
738 0 : epoch_start_lsn: state.sk.term_start_lsn(),
739 0 : mem_state: state.sk.state().inmem.clone(),
740 0 : mgr_status: self.mgr_status.get(),
741 0 : write_lsn,
742 0 : write_record_lsn,
743 0 : flush_lsn,
744 0 : file_open,
745 0 : }
746 0 : }
747 :
748 : /// Apply a function to the control file state and persist it.
749 0 : pub async fn map_control_file<T>(
750 0 : self: &Arc<Self>,
751 0 : f: impl FnOnce(&mut TimelinePersistentState) -> Result<T>,
752 0 : ) -> Result<T> {
753 0 : let mut state = self.write_shared_state().await;
754 0 : let mut persistent_state = state.sk.state_mut().start_change();
755 : // If f returns error, we abort the change and don't persist anything.
756 0 : let res = f(&mut persistent_state)?;
757 : // If persisting fails, we abort the change and return error.
758 0 : state
759 0 : .sk
760 0 : .state_mut()
761 0 : .finish_change(&persistent_state)
762 0 : .await?;
763 0 : Ok(res)
764 0 : }
765 :
766 0 : pub async fn term_bump(self: &Arc<Self>, to: Option<Term>) -> Result<TimelineTermBumpResponse> {
767 0 : let mut state = self.write_shared_state().await;
768 0 : state.sk.term_bump(to).await
769 0 : }
770 :
771 : /// Guts of [`Self::wal_residence_guard`] and [`Self::try_wal_residence_guard`]
772 0 : async fn do_wal_residence_guard(
773 0 : self: &Arc<Self>,
774 0 : block: bool,
775 0 : ) -> Result<Option<WalResidentTimeline>> {
776 0 : let op_label = if block {
777 0 : "wal_residence_guard"
778 : } else {
779 0 : "try_wal_residence_guard"
780 : };
781 :
782 0 : if self.is_cancelled() {
783 0 : bail!(TimelineError::Cancelled(self.ttid));
784 0 : }
785 0 :
786 0 : debug!("requesting WalResidentTimeline guard");
787 0 : let started_at = Instant::now();
788 0 : let status_before = self.mgr_status.get();
789 :
790 : // Wait 30 seconds for the guard to be acquired. It can time out if someone is
791 : // holding the lock (e.g. during `SafeKeeper::process_msg()`) or manager task
792 : // is stuck.
793 0 : let res = tokio::time::timeout_at(started_at + Duration::from_secs(30), async {
794 0 : if block {
795 0 : self.manager_ctl.wal_residence_guard().await.map(Some)
796 : } else {
797 0 : self.manager_ctl.try_wal_residence_guard().await
798 : }
799 0 : })
800 0 : .await;
801 :
802 0 : let guard = match res {
803 0 : Ok(Ok(guard)) => {
804 0 : let finished_at = Instant::now();
805 0 : let elapsed = finished_at - started_at;
806 0 : MISC_OPERATION_SECONDS
807 0 : .with_label_values(&[op_label])
808 0 : .observe(elapsed.as_secs_f64());
809 0 :
810 0 : guard
811 : }
812 0 : Ok(Err(e)) => {
813 0 : warn!(
814 0 : "error acquiring in {op_label}, statuses {:?} => {:?}",
815 0 : status_before,
816 0 : self.mgr_status.get()
817 : );
818 0 : return Err(e);
819 : }
820 : Err(_) => {
821 0 : warn!(
822 0 : "timeout acquiring in {op_label} guard, statuses {:?} => {:?}",
823 0 : status_before,
824 0 : self.mgr_status.get()
825 : );
826 0 : anyhow::bail!("timeout while acquiring WalResidentTimeline guard");
827 : }
828 : };
829 :
830 0 : Ok(guard.map(|g| WalResidentTimeline::new(self.clone(), g)))
831 0 : }
832 :
833 : /// Get the timeline guard for reading/writing WAL files.
834 : /// If WAL files are not present on disk (evicted), they will be automatically
835 : /// downloaded from remote storage. This is done in the manager task, which is
836 : /// responsible for issuing all guards.
837 : ///
838 : /// NB: don't use this function from timeline_manager, it will deadlock.
839 : /// NB: don't use this function while holding shared_state lock.
840 0 : pub async fn wal_residence_guard(self: &Arc<Self>) -> Result<WalResidentTimeline> {
841 0 : self.do_wal_residence_guard(true)
842 0 : .await
843 0 : .map(|m| m.expect("Always get Some in block=true mode"))
844 0 : }
845 :
846 : /// Get the timeline guard for reading/writing WAL files if the timeline is resident,
847 : /// else return None
848 0 : pub(crate) async fn try_wal_residence_guard(
849 0 : self: &Arc<Self>,
850 0 : ) -> Result<Option<WalResidentTimeline>> {
851 0 : self.do_wal_residence_guard(false).await
852 0 : }
853 :
854 0 : pub async fn backup_partial_reset(self: &Arc<Self>) -> Result<Vec<String>> {
855 0 : self.manager_ctl.backup_partial_reset().await
856 0 : }
857 : }
858 :
859 : /// This is a guard that allows to read/write disk timeline state.
860 : /// All tasks that are trying to read/write WAL from disk should use this guard.
861 : pub struct WalResidentTimeline {
862 : pub tli: Arc<Timeline>,
863 : _guard: ResidenceGuard,
864 : }
865 :
866 : impl WalResidentTimeline {
867 0 : pub fn new(tli: Arc<Timeline>, _guard: ResidenceGuard) -> Self {
868 0 : WalResidentTimeline { tli, _guard }
869 0 : }
870 : }
871 :
872 : impl Deref for WalResidentTimeline {
873 : type Target = Arc<Timeline>;
874 :
875 0 : fn deref(&self) -> &Self::Target {
876 0 : &self.tli
877 0 : }
878 : }
879 :
880 : impl WalResidentTimeline {
881 : /// Returns true if walsender should stop sending WAL to pageserver. We
882 : /// terminate it if remote_consistent_lsn reached commit_lsn and there is no
883 : /// computes. While there might be nothing to stream already, we learn about
884 : /// remote_consistent_lsn update through replication feedback, and we want
885 : /// to stop pushing to the broker if pageserver is fully caughtup.
886 0 : pub async fn should_walsender_stop(&self, reported_remote_consistent_lsn: Lsn) -> bool {
887 0 : if self.is_cancelled() {
888 0 : return true;
889 0 : }
890 0 : let shared_state = self.read_shared_state().await;
891 0 : if self.walreceivers.get_num() == 0 {
892 0 : return shared_state.sk.state().inmem.commit_lsn == Lsn(0) || // no data at all yet
893 0 : reported_remote_consistent_lsn >= shared_state.sk.state().inmem.commit_lsn;
894 0 : }
895 0 : false
896 0 : }
897 :
898 : /// Ensure that current term is t, erroring otherwise, and lock the state.
899 0 : pub async fn acquire_term(&self, t: Term) -> Result<ReadGuardSharedState> {
900 0 : let ss = self.read_shared_state().await;
901 0 : if ss.sk.state().acceptor_state.term != t {
902 0 : bail!(
903 0 : "failed to acquire term {}, current term {}",
904 0 : t,
905 0 : ss.sk.state().acceptor_state.term
906 0 : );
907 0 : }
908 0 : Ok(ss)
909 0 : }
910 :
911 : /// Pass arrived message to the safekeeper.
912 0 : pub async fn process_msg(
913 0 : &self,
914 0 : msg: &ProposerAcceptorMessage,
915 0 : ) -> Result<Option<AcceptorProposerMessage>> {
916 0 : if self.is_cancelled() {
917 0 : bail!(TimelineError::Cancelled(self.ttid));
918 0 : }
919 :
920 : let mut rmsg: Option<AcceptorProposerMessage>;
921 : {
922 0 : let mut shared_state = self.write_shared_state().await;
923 0 : rmsg = shared_state.sk.safekeeper().process_msg(msg).await?;
924 :
925 : // if this is AppendResponse, fill in proper hot standby feedback.
926 0 : if let Some(AcceptorProposerMessage::AppendResponse(ref mut resp)) = rmsg {
927 0 : resp.hs_feedback = self.walsenders.get_hotstandby().hs_feedback;
928 0 : }
929 : }
930 0 : Ok(rmsg)
931 0 : }
932 :
933 0 : pub async fn get_walreader(&self, start_lsn: Lsn) -> Result<WalReader> {
934 0 : let (_, persisted_state) = self.get_state().await;
935 0 : let enable_remote_read = self.conf.is_wal_backup_enabled();
936 0 :
937 0 : WalReader::new(
938 0 : &self.ttid,
939 0 : self.timeline_dir.clone(),
940 0 : &persisted_state,
941 0 : start_lsn,
942 0 : enable_remote_read,
943 0 : )
944 0 : }
945 :
946 0 : pub fn get_timeline_dir(&self) -> Utf8PathBuf {
947 0 : self.timeline_dir.clone()
948 0 : }
949 :
950 : /// Update in memory remote consistent lsn.
951 0 : pub async fn update_remote_consistent_lsn(&self, candidate: Lsn) {
952 0 : let mut shared_state = self.write_shared_state().await;
953 0 : shared_state.sk.state_mut().inmem.remote_consistent_lsn = max(
954 0 : shared_state.sk.state().inmem.remote_consistent_lsn,
955 0 : candidate,
956 0 : );
957 0 : }
958 : }
959 :
960 : /// This struct contains methods that are used by timeline manager task.
961 : pub(crate) struct ManagerTimeline {
962 : pub(crate) tli: Arc<Timeline>,
963 : }
964 :
965 : impl Deref for ManagerTimeline {
966 : type Target = Arc<Timeline>;
967 :
968 0 : fn deref(&self) -> &Self::Target {
969 0 : &self.tli
970 0 : }
971 : }
972 :
973 : impl ManagerTimeline {
974 0 : pub(crate) fn timeline_dir(&self) -> &Utf8PathBuf {
975 0 : &self.tli.timeline_dir
976 0 : }
977 :
978 : /// Manager requests this state on startup.
979 0 : pub(crate) async fn bootstrap_mgr(&self) -> (bool, Option<PartialRemoteSegment>) {
980 0 : let shared_state = self.read_shared_state().await;
981 0 : let is_offloaded = matches!(
982 0 : shared_state.sk.state().eviction_state,
983 : EvictionState::Offloaded(_)
984 : );
985 0 : let partial_backup_uploaded = shared_state.sk.state().partial_backup.uploaded_segment();
986 0 :
987 0 : (is_offloaded, partial_backup_uploaded)
988 0 : }
989 :
990 : /// Try to switch state Present->Offloaded.
991 0 : pub(crate) async fn switch_to_offloaded(
992 0 : &self,
993 0 : partial: &PartialRemoteSegment,
994 0 : ) -> anyhow::Result<()> {
995 0 : let mut shared = self.write_shared_state().await;
996 :
997 : // updating control file
998 0 : let mut pstate = shared.sk.state_mut().start_change();
999 :
1000 0 : if !matches!(pstate.eviction_state, EvictionState::Present) {
1001 0 : bail!(
1002 0 : "cannot switch to offloaded state, current state is {:?}",
1003 0 : pstate.eviction_state
1004 0 : );
1005 0 : }
1006 0 :
1007 0 : if partial.flush_lsn != shared.sk.flush_lsn() {
1008 0 : bail!(
1009 0 : "flush_lsn mismatch in partial backup, expected {}, got {}",
1010 0 : shared.sk.flush_lsn(),
1011 0 : partial.flush_lsn
1012 0 : );
1013 0 : }
1014 0 :
1015 0 : if partial.commit_lsn != pstate.commit_lsn {
1016 0 : bail!(
1017 0 : "commit_lsn mismatch in partial backup, expected {}, got {}",
1018 0 : pstate.commit_lsn,
1019 0 : partial.commit_lsn
1020 0 : );
1021 0 : }
1022 0 :
1023 0 : if partial.term != shared.sk.last_log_term() {
1024 0 : bail!(
1025 0 : "term mismatch in partial backup, expected {}, got {}",
1026 0 : shared.sk.last_log_term(),
1027 0 : partial.term
1028 0 : );
1029 0 : }
1030 0 :
1031 0 : pstate.eviction_state = EvictionState::Offloaded(shared.sk.flush_lsn());
1032 0 : shared.sk.state_mut().finish_change(&pstate).await?;
1033 : // control file is now switched to Offloaded state
1034 :
1035 : // now we can switch shared.sk to Offloaded, shouldn't fail
1036 0 : let prev_sk = std::mem::replace(&mut shared.sk, StateSK::Empty);
1037 0 : let cfile_state = prev_sk.take_state();
1038 0 : shared.sk = StateSK::Offloaded(Box::new(cfile_state));
1039 0 :
1040 0 : Ok(())
1041 0 : }
1042 :
1043 : /// Try to switch state Offloaded->Present.
1044 0 : pub(crate) async fn switch_to_present(&self) -> anyhow::Result<()> {
1045 0 : let mut shared = self.write_shared_state().await;
1046 :
1047 : // trying to restore WAL storage
1048 0 : let wal_store = wal_storage::PhysicalStorage::new(
1049 0 : &self.ttid,
1050 0 : &self.timeline_dir,
1051 0 : shared.sk.state(),
1052 0 : self.conf.no_sync,
1053 0 : )?;
1054 :
1055 : // updating control file
1056 0 : let mut pstate = shared.sk.state_mut().start_change();
1057 :
1058 0 : if !matches!(pstate.eviction_state, EvictionState::Offloaded(_)) {
1059 0 : bail!(
1060 0 : "cannot switch to present state, current state is {:?}",
1061 0 : pstate.eviction_state
1062 0 : );
1063 0 : }
1064 0 :
1065 0 : if wal_store.flush_lsn() != shared.sk.flush_lsn() {
1066 0 : bail!(
1067 0 : "flush_lsn mismatch in restored WAL, expected {}, got {}",
1068 0 : shared.sk.flush_lsn(),
1069 0 : wal_store.flush_lsn()
1070 0 : );
1071 0 : }
1072 0 :
1073 0 : pstate.eviction_state = EvictionState::Present;
1074 0 : shared.sk.state_mut().finish_change(&pstate).await?;
1075 :
1076 : // now we can switch shared.sk to Present, shouldn't fail
1077 0 : let prev_sk = std::mem::replace(&mut shared.sk, StateSK::Empty);
1078 0 : let cfile_state = prev_sk.take_state();
1079 0 : shared.sk = StateSK::Loaded(SafeKeeper::new(cfile_state, wal_store, self.conf.my_id)?);
1080 :
1081 0 : Ok(())
1082 0 : }
1083 :
1084 : /// Update current manager state, useful for debugging manager deadlocks.
1085 0 : pub(crate) fn set_status(&self, status: timeline_manager::Status) {
1086 0 : self.mgr_status.store(status, Ordering::Relaxed);
1087 0 : }
1088 : }
1089 :
1090 : /// Deletes directory and it's contents. Returns false if directory does not exist.
1091 0 : async fn delete_dir(path: &Utf8PathBuf) -> Result<bool> {
1092 0 : match fs::remove_dir_all(path).await {
1093 0 : Ok(_) => Ok(true),
1094 0 : Err(e) if e.kind() == std::io::ErrorKind::NotFound => Ok(false),
1095 0 : Err(e) => Err(e.into()),
1096 : }
1097 0 : }
1098 :
1099 : /// Get a path to the tenant directory. If you just need to get a timeline directory,
1100 : /// use WalResidentTimeline::get_timeline_dir instead.
1101 0 : pub fn get_tenant_dir(conf: &SafeKeeperConf, tenant_id: &TenantId) -> Utf8PathBuf {
1102 0 : conf.workdir.join(tenant_id.to_string())
1103 0 : }
1104 :
1105 : /// Get a path to the timeline directory. If you need to read WAL files from disk,
1106 : /// use WalResidentTimeline::get_timeline_dir instead. This function does not check
1107 : /// timeline eviction status and WAL files might not be present on disk.
1108 0 : pub fn get_timeline_dir(conf: &SafeKeeperConf, ttid: &TenantTimelineId) -> Utf8PathBuf {
1109 0 : get_tenant_dir(conf, &ttid.tenant_id).join(ttid.timeline_id.to_string())
1110 0 : }
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