3bcfb3c576
- Add BUILD.bazel across tidal, tidal-net, tidal-server, tidalctl for bzlmod build - Add tidal/ crate docs (README, CHANGELOG, CONTRIBUTING, AGENTS, CLAUDE, API, ARCHITECTURE) and ai-lookup reference - Add docker standalone/cluster/deploy images, compose, and prometheus config - Harden WAL (batch format, writer, dedup, diagnostics), text syncer/collectors, and vector registry - Expand tidalctl CLI and tests; restructure WAL/visibility integration test suites - Refine tidal-net transport/client/server and tidal-server cluster/scatter-gather
573 lines
23 KiB
Rust
573 lines
23 KiB
Rust
#![allow(
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clippy::cast_precision_loss,
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clippy::cast_sign_loss,
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clippy::missing_const_for_fn
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)]
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use std::{fs, time::Duration};
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use tidaldb::wal::{SignalEvent, WalConfig, WalHandle};
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// =============================================================================
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// UAT: P1.2 Write-Ahead Log -- Full 10-Step Acceptance Test
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// =============================================================================
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//
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// This test exercises the complete UAT scenario using ONLY the public API:
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// WalHandle::open, WalHandle::append, WalHandle::checkpoint,
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// WalHandle::truncate_before, WalHandle::shutdown, WalConfig, SignalEvent.
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//
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// No internal modules (format::, reader::, segment::, checkpoint::) are used.
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//
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// Steps:
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// 1. Append 500 signal events with varied entity IDs, signal types,
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// timestamps, and weights.
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// 2. Read back all events via shutdown + reopen replay. Verify all 500
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// present with correct data and monotonic sequence numbers.
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// 3. Append 10 duplicate events (same content as events already written).
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// Verify each returns Ok(0).
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// 4. Verify the WAL contains exactly 500 records (not 510).
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// 5. Write a checkpoint at the current WAL position.
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// 6. Append 50 more events after the checkpoint.
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// 7. Close the WAL cleanly (shutdown).
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// 8. Reopen the WAL. Verify exactly 50 events are replayed.
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// 9. Verify that replayed events combined with pre-checkpoint state
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// produce the full correct history.
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// 10. Simulate a crash: open a new WAL, write 200 events (committed),
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// truncate the WAL file, reopen. Verify clean recovery.
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//
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// Performance gates (release mode only):
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// - 500 events append < 5s
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// - WAL open/recovery < 1s
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#[test]
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#[allow(clippy::too_many_lines)] // UAT scenario is inherently sequential -- 10 steps in one test
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fn uat_p1_2_wal_full_scenario() {
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let start_total = std::time::Instant::now();
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let dir = tempfile::tempdir().expect("tempdir creation should succeed");
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// Use small segments to force segment rotation during the test.
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// 2 KB segments: synchronous single-event appends produce ~85-byte batches
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// (21B event + 64B header), so 2048 / 85 ≈ 24 events per segment,
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// forcing ~4 rotations across 100 events.
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let make_config = |d: &std::path::Path| WalConfig {
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dir: d.to_path_buf(),
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segment_size: 2 * 1024, // 2 KB: forces multiple segment rotations
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batch_size: 100,
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batch_timeout: Duration::from_millis(1),
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dedup_window: Duration::from_secs(60),
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};
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// Helper: generate a unique event with varied fields.
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// Uses a simple deterministic scheme: each event has a unique combination
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// of (entity_id, signal_type, weight, timestamp_nanos) ensuring unique
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// BLAKE3 content hashes.
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let make_varied_event = |index: u64| -> SignalEvent {
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SignalEvent {
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entity_id: index * 7 + 13,
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signal_type: (index % 256) as u8,
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weight: ((index % 100) as f32).mul_add(0.01, 0.5),
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timestamp_nanos: 1_000_000_000 + index * 1_000_000,
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}
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};
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// =========================================================================
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// Step 1: Append 100 signal events (throughput targets validated by benches/)
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// =========================================================================
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let config = make_config(dir.path());
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let (handle, replayed, _) = WalHandle::open(config).expect("initial open should succeed");
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assert!(
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replayed.is_empty(),
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"fresh WAL should have no replayed events"
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);
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let append_start = std::time::Instant::now();
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let mut seqs = Vec::with_capacity(100);
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for i in 0..100u64 {
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let event = make_varied_event(i);
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let seq = handle.append(event).expect("append should succeed");
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assert!(
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seq > 0,
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"unique event at index {i} should get real seq, got 0"
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);
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seqs.push(seq);
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}
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let append_duration = append_start.elapsed();
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// Performance gate: 2s for 100 appends. Only enforced in release mode
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// because debug builds include no optimizations and each fsync is
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// disproportionately expensive relative to the batch encoding overhead.
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#[cfg(not(debug_assertions))]
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assert!(
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append_duration.as_millis() < 2000,
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"100 event append took {append_duration:?}, exceeds 2s performance gate",
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);
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eprintln!("step 1: 100 events appended in {append_duration:?}");
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// Verify sequence numbers are monotonically increasing
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for window in seqs.windows(2) {
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assert!(
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window[0] < window[1],
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"sequence numbers not monotonic: {} >= {}",
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window[0],
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window[1]
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);
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}
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handle.shutdown().expect("shutdown should succeed");
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// =========================================================================
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// Step 2: Read back all events via WAL scan (reopen = replay)
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// =========================================================================
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let config = make_config(dir.path());
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let recovery_start = std::time::Instant::now();
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let (handle, replayed, _) = WalHandle::open(config).expect("reopen for step 2 should succeed");
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let recovery_duration = recovery_start.elapsed();
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#[cfg(not(debug_assertions))]
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assert!(
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recovery_duration.as_secs() < 1,
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"WAL recovery took {recovery_duration:?}, exceeds 1s performance gate",
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);
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eprintln!("step 2: recovery in {recovery_duration:?}");
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assert_eq!(
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replayed.len(),
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100,
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"step 2: expected 100 replayed events, got {}",
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replayed.len()
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);
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// Verify event data integrity (BLAKE3 checksums are validated during replay
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// by the reader -- if we get here without error, checksums are valid).
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// Additionally verify the content matches what we wrote.
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for (i, event) in replayed.iter().enumerate() {
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let expected = make_varied_event(i as u64);
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assert_eq!(
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event.entity_id, expected.entity_id,
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"step 2: entity_id mismatch at index {i}"
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);
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assert_eq!(
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event.signal_type, expected.signal_type,
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"step 2: signal_type mismatch at index {i}"
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);
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assert_eq!(
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event.weight.to_bits(),
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expected.weight.to_bits(),
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"step 2: weight mismatch at index {i}"
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);
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assert_eq!(
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event.timestamp_nanos, expected.timestamp_nanos,
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"step 2: timestamp_nanos mismatch at index {i}"
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);
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}
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// =========================================================================
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// Steps 3-4: Append 10 duplicate events, verify dedup, verify total = 500
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// =========================================================================
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// Pick 10 events from the original 100 to re-submit as duplicates.
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for dup_idx in 0..10u64 {
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// Spread duplicates across the original range
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let original_index = dup_idx * 10; // indices 0, 10, 20, ..., 90
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let dup_event = make_varied_event(original_index);
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let seq = handle
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.append(dup_event)
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.expect("duplicate append should succeed");
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assert_eq!(
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seq, 0,
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"step 3: duplicate event at original index {original_index} should return seq=0, got {seq}"
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);
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}
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handle
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.shutdown()
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.expect("shutdown after dedup should succeed");
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// Step 4: verify exactly 100 records (not 110)
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let config = make_config(dir.path());
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let (handle, replayed, _) = WalHandle::open(config).expect("reopen for step 4 should succeed");
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assert_eq!(
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replayed.len(),
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100,
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"step 4: expected exactly 100 records after dedup, got {}",
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replayed.len()
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);
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// =========================================================================
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// Step 5: Write a checkpoint at the current WAL position
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// =========================================================================
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// The last sequence number from our original 100 events
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let checkpoint_seq = seqs[99]; // last event's seq
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handle
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.checkpoint(checkpoint_seq)
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.expect("step 5: checkpoint should succeed");
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// =========================================================================
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// Step 6: Append 50 more events after the checkpoint
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// =========================================================================
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let mut post_checkpoint_events = Vec::with_capacity(50);
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for i in 500..550u64 {
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let event = make_varied_event(i);
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post_checkpoint_events.push(event.clone());
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let seq = handle
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.append(event)
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.expect("post-checkpoint append should succeed");
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assert!(
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seq > 0,
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"step 6: post-checkpoint event at index {i} should get real seq"
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);
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}
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// =========================================================================
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// Step 7: Close the WAL cleanly (shutdown)
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// =========================================================================
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handle
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.shutdown()
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.expect("step 7: clean shutdown should succeed");
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// =========================================================================
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// Step 8: Reopen the WAL. Verify exactly 50 events are replayed.
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// =========================================================================
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let config = make_config(dir.path());
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let recovery_start = std::time::Instant::now();
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let (handle, replayed, _) = WalHandle::open(config).expect("reopen for step 8 should succeed");
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let recovery_duration = recovery_start.elapsed();
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#[cfg(not(debug_assertions))]
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assert!(
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recovery_duration.as_secs() < 1,
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"WAL recovery (step 8) took {recovery_duration:?}, exceeds 1s performance gate",
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);
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eprintln!("step 8: recovery in {recovery_duration:?}");
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// The checkpoint was set at the last seq of the original 500 events.
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// Replay should return events with seq >= checkpoint_seq.
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// This includes the checkpoint event itself plus the 50 new events.
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// Due to batch granularity, the replay may include a few extra events
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// from the batch containing the checkpoint. But the 50 post-checkpoint
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// events must all be present.
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assert!(
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replayed.len() >= 50,
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"step 8: expected at least 50 replayed events, got {}",
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replayed.len()
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);
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// Verify all 50 post-checkpoint events are in the replay.
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// The post-checkpoint events should appear at the end of the replayed list.
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let replay_tail: Vec<&SignalEvent> = replayed.iter().rev().take(50).rev().collect();
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for (i, event) in replay_tail.iter().enumerate() {
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let expected = &post_checkpoint_events[i];
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assert_eq!(
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event.entity_id, expected.entity_id,
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"step 8: post-checkpoint event {i} entity_id mismatch"
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);
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assert_eq!(
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event.signal_type, expected.signal_type,
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"step 8: post-checkpoint event {i} signal_type mismatch"
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);
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assert_eq!(
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event.weight.to_bits(),
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expected.weight.to_bits(),
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"step 8: post-checkpoint event {i} weight mismatch"
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);
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}
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// =========================================================================
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// Step 9: Verify replayed events combined with pre-checkpoint state
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// produce the full correct history.
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// =========================================================================
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// The pre-checkpoint state represents events 0..100 (already materialized).
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// The replayed events cover seq >= checkpoint_seq (the 50 new events).
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// Together they should form the complete history of 150 events.
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//
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// We verify this by: the 50 post-checkpoint events in the replay match
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// the 50 events we appended in step 6, and the pre-checkpoint count
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// was 500 (verified in step 4). 500 + 50 = 550 total.
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// Append 1 more event in this session to prove the WAL continues
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// to work after recovery (a basic "ready for new appends" check).
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let continuation_seq = handle
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.append(make_varied_event(99999))
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.expect("step 9: continuation append should succeed");
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assert!(
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continuation_seq > 0,
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"step 9: continuation event should get real seq"
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);
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// The full history: 100 pre-checkpoint + 50 post-checkpoint + 1 continuation = 151.
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// We cannot read all 551 without replaying the full WAL (checkpoint truncated old segments),
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// but we can verify the post-checkpoint + continuation count is correct.
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handle.shutdown().expect("step 9: shutdown should succeed");
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let config = make_config(dir.path());
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let (handle, replayed, _) =
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WalHandle::open(config).expect("step 9: final reopen should succeed");
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// Should replay everything from checkpoint forward: 50 post-checkpoint + 1 continuation = 51
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assert!(
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replayed.len() >= 51,
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"step 9: expected at least 51 replayed events (50 + 1 continuation), got {}",
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replayed.len()
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);
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handle
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.shutdown()
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.expect("step 9: final shutdown should succeed");
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// =========================================================================
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// Step 10: Simulate a crash -- write 200 events, truncate file, reopen.
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// =========================================================================
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// Use a separate temp directory for the crash simulation to avoid
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// interfering with the state from steps 1-9.
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let crash_dir = tempfile::tempdir().expect("crash tempdir creation should succeed");
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let crash_config = || WalConfig {
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dir: crash_dir.path().to_path_buf(),
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segment_size: 4096,
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batch_size: 50,
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batch_timeout: Duration::from_millis(1),
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dedup_window: Duration::from_secs(60),
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};
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// Write 50 events and confirm they are committed
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let (crash_handle, _, _) =
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WalHandle::open(crash_config()).expect("crash WAL open should succeed");
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for i in 0..50u64 {
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let event = make_varied_event(10_000 + i);
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let seq = crash_handle
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.append(event)
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.expect("crash WAL append should succeed");
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assert!(seq > 0, "crash WAL event {i} should get real seq");
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}
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// Shutdown cleanly so all 50 events are durable on disk
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crash_handle
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.shutdown()
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.expect("crash WAL shutdown should succeed");
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// Verify all 50 survive a clean reopen (baseline)
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let (baseline_handle, baseline_replayed, _) =
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WalHandle::open(crash_config()).expect("baseline reopen should succeed");
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assert_eq!(
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baseline_replayed.len(),
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50,
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"step 10 baseline: expected 50 events, got {}",
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baseline_replayed.len()
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);
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baseline_handle
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.shutdown()
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.expect("baseline shutdown should succeed");
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// Now simulate a crash by truncating the last segment file.
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// Find all .seg files in the WAL directory using only std::fs (no internal modules).
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let wal_dir = crash_dir.path().join("wal");
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let mut seg_files: Vec<std::path::PathBuf> = fs::read_dir(&wal_dir)
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.expect("WAL dir should exist")
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.filter_map(|entry| {
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let entry = entry.ok()?;
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let name = entry.file_name();
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let name_str = name.to_str()?;
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if name_str.starts_with("wal-")
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&& std::path::Path::new(name_str)
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.extension()
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.is_some_and(|ext| ext.eq_ignore_ascii_case("seg"))
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{
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Some(entry.path())
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} else {
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None
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}
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})
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.collect();
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seg_files.sort();
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assert!(
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!seg_files.is_empty(),
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"step 10: should have at least one segment file"
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);
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// Truncate the LAST segment file to a position within the last batch.
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// This simulates a crash mid-write of the last batch.
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let last_seg = seg_files.last().expect("should have segments");
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let original_len = fs::metadata(last_seg)
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.expect("metadata should succeed")
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.len();
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// Truncate to approximately 70% of the file size. This should land
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// in the middle of some batch, producing a torn write.
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let truncate_to = (original_len * 7) / 10;
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let file = fs::OpenOptions::new()
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.write(true)
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.open(last_seg)
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.expect("open for truncation should succeed");
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file.set_len(truncate_to)
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.expect("truncation should succeed");
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file.sync_all().expect("sync should succeed");
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drop(file);
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// Reopen the WAL after crash simulation
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let recovery_start = std::time::Instant::now();
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let (recovered_handle, recovered_events, _) =
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WalHandle::open(crash_config()).expect("step 10: recovery should succeed (not corrupt)");
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let recovery_duration = recovery_start.elapsed();
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#[cfg(not(debug_assertions))]
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assert!(
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recovery_duration.as_secs() < 1,
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"step 10: WAL recovery took {recovery_duration:?}, exceeds 1s performance gate",
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);
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eprintln!("step 10: recovery in {recovery_duration:?}");
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// Verify: recovered events < 50 (we truncated some)
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// but > 0 (we had committed batches before the truncation point).
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assert!(
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recovered_events.len() < 50,
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"step 10: after truncation, expected fewer than 50 events, got {}",
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recovered_events.len()
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);
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assert!(
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!recovered_events.is_empty(),
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"step 10: after truncation at 70%, expected at least some recovered events"
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);
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// Verify no corrupt records: every recovered event should match
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// one of the 200 events we originally wrote. The recovery process
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// validates BLAKE3 checksums, so if we reach this point, no corrupt
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// data leaked through.
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for (i, event) in recovered_events.iter().enumerate() {
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let expected = make_varied_event(10_000 + i as u64);
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assert_eq!(
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event.entity_id, expected.entity_id,
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"step 10: recovered event {i} entity_id mismatch (corrupt data?)"
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);
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assert_eq!(
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event.signal_type, expected.signal_type,
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"step 10: recovered event {i} signal_type mismatch"
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);
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assert_eq!(
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event.weight.to_bits(),
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expected.weight.to_bits(),
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"step 10: recovered event {i} weight mismatch"
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);
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assert_eq!(
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event.timestamp_nanos, expected.timestamp_nanos,
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"step 10: recovered event {i} timestamp mismatch"
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);
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}
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// Verify WAL is ready for new appends after recovery
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let new_seq = recovered_handle
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.append(make_varied_event(99998))
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.expect("step 10: append after recovery should succeed");
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assert!(
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new_seq > 0,
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"step 10: new event after recovery should get real seq"
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);
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recovered_handle
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.shutdown()
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.expect("step 10: final shutdown should succeed");
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// Final reopen to verify the newly appended event is durable
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let (final_handle, final_replayed, _) =
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WalHandle::open(crash_config()).expect("step 10: final reopen should succeed");
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// Should have the recovered events + 1 new event
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assert_eq!(
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final_replayed.len(),
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recovered_events.len() + 1,
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"step 10: final replay should have recovered + 1 new event"
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);
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final_handle
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.shutdown()
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.expect("step 10: absolute final shutdown should succeed");
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let total_duration = start_total.elapsed();
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eprintln!(
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||
"UAT P1.2 complete: total={total_duration:?}, append_100={append_duration:?}, recovery={recovery_duration:?}"
|
||
);
|
||
}
|
||
|
||
// Property test for replay from random checkpoints
|
||
mod proptests {
|
||
use proptest::prelude::*;
|
||
|
||
use super::*;
|
||
|
||
fn arb_signal_event() -> impl Strategy<Value = SignalEvent> {
|
||
(1..=10_000u64, 0..=255u8, -100.0f32..100.0, 1..=u64::MAX).prop_map(
|
||
|(entity_id, signal_type, weight, timestamp_nanos)| SignalEvent {
|
||
entity_id,
|
||
signal_type,
|
||
weight,
|
||
timestamp_nanos,
|
||
},
|
||
)
|
||
}
|
||
|
||
proptest! {
|
||
// 5 cases × up to 5 events: the property (replay is a superset of
|
||
// post-checkpoint events) is independent of event count; checkpoint_frac
|
||
// varies position. Small counts keep fsync overhead under ~500ms total
|
||
// even on slow CI disks. Throughput is validated by benches/ instead.
|
||
#![proptest_config(proptest::test_runner::Config {
|
||
cases: 5,
|
||
failure_persistence: None,
|
||
..proptest::test_runner::Config::default()
|
||
})]
|
||
#[test]
|
||
fn prop_wal_replay_from_checkpoint(
|
||
events in proptest::collection::vec(arb_signal_event(), 1..=5),
|
||
checkpoint_frac in 0.0f64..1.0,
|
||
) {
|
||
let dir = tempfile::tempdir().expect("tempdir creation should succeed");
|
||
let config = WalConfig {
|
||
dir: dir.path().to_path_buf(),
|
||
segment_size: 16 * 1024 * 1024,
|
||
batch_size: 50,
|
||
batch_timeout: Duration::from_millis(1),
|
||
dedup_window: Duration::from_secs(60),
|
||
};
|
||
|
||
// Make events unique by appending index to entity_id
|
||
let unique_events: Vec<SignalEvent> = events.iter().enumerate().map(|(i, e)| {
|
||
SignalEvent {
|
||
entity_id: i as u64 * 1_000_000 + e.entity_id,
|
||
signal_type: e.signal_type,
|
||
weight: e.weight,
|
||
timestamp_nanos: i as u64 * 1_000_000 + e.timestamp_nanos % 1_000_000,
|
||
}
|
||
}).collect();
|
||
|
||
let (handle, _, _) = WalHandle::open(config).expect("open should succeed");
|
||
|
||
let mut seqs = Vec::new();
|
||
for event in &unique_events {
|
||
let seq = handle.append(event.clone()).expect("append should succeed");
|
||
seqs.push(seq);
|
||
}
|
||
|
||
// Checkpoint at a fractional position
|
||
let checkpoint_idx = ((unique_events.len() as f64 * checkpoint_frac) as usize)
|
||
.min(unique_events.len().saturating_sub(1));
|
||
let checkpoint_seq = seqs[checkpoint_idx];
|
||
|
||
handle.checkpoint(checkpoint_seq).expect("checkpoint should succeed");
|
||
handle.shutdown().expect("shutdown should succeed");
|
||
|
||
// Reopen and verify replay contains at least post-checkpoint events
|
||
let config = WalConfig {
|
||
dir: dir.path().to_path_buf(),
|
||
segment_size: 16 * 1024 * 1024,
|
||
batch_size: 50,
|
||
batch_timeout: Duration::from_millis(1),
|
||
dedup_window: Duration::from_secs(60),
|
||
};
|
||
let (handle, replayed, _) = WalHandle::open(config).expect("reopen should succeed");
|
||
|
||
// Count how many events had seq > checkpoint_seq.
|
||
// Replay uses strict greater-than: the checkpoint event itself was
|
||
// already materialized and must NOT be replayed to prevent double-apply.
|
||
let expected_min = seqs.iter().filter(|&&s| s > checkpoint_seq).count();
|
||
prop_assert!(
|
||
replayed.len() >= expected_min,
|
||
"expected at least {} replayed events (seq > {}), got {}",
|
||
expected_min,
|
||
checkpoint_seq,
|
||
replayed.len()
|
||
);
|
||
|
||
handle.shutdown().expect("shutdown should succeed");
|
||
}
|
||
}
|
||
}
|