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rustfs/crates/scanner/src/scanner.rs
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Henry Guo 105b6fbfde fix(scanner): honor explicit cycle cadence (#6313) 
Co-authored-by: Henry Guo <marshawcoco@users.noreply.github.com>
Co-authored-by: houseme <housemecn@gmail.com>
2026-08-20 23:35:03 +08:00

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// Copyright 2024 RustFS Team
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
use std::collections::BTreeMap;
use std::future::Future;
#[cfg(test)]
use std::sync::Mutex as StdMutex;
use std::sync::{Arc, LazyLock, RwLock};
use crate::data_usage_define::{
BACKGROUND_HEAL_INFO_PATH, DATA_USAGE_BLOOM_NAME_PATH, DATA_USAGE_OBJ_NAME_PATH, DATA_USAGE_OBSERVED_OBJ_NAME_PATH,
DataUsageCache, DataUsageCacheRevision, LEGACY_DATA_USAGE_OBJ_NAME_PATH, read_config_with_revision,
};
use crate::runtime_config::{
ScannerRuntimeConfig, ScannerRuntimeConfigSource, refresh_scanner_runtime_config_from_global, scanner_bitrot_cycle,
scanner_cycle_interval, scanner_runtime_config_changed, scanner_runtime_config_generation, scanner_start_delay,
set_scanner_default_cycle_secs,
};
use crate::scanner_budget::{ScannerCycleBudget, ScannerCycleBudgetConfig, ScannerCycleBudgetReason};
use crate::scanner_folder::{data_usage_update_dir_cycles, heal_object_select_prob};
use crate::scanner_io::{
ScannerCycleDeferReason, ScannerCycleStatus, ScannerIOCycle, dirty_usage_bucket_notified, dirty_usage_buckets_pending,
dirty_usage_generation, scanner_dirty_usage_state, scanner_maintenance_changed, scanner_maintenance_generation,
};
use crate::sleeper::{SCANNER_SLEEPER, set_scanner_default_speed};
use crate::{DataUsageInfo, ScannerActivityGuard, ScannerError, ScannerRuntimeGuard};
use crate::{ScannerConfigObjectDelete, ScannerObjectIO, ScannerObjectOptions};
use bytes::Bytes;
use chrono::{DateTime, Utc};
use rustfs_common::heal_channel::HealScanMode;
use rustfs_common::metrics::{
CurrentCycle, Metric, Metrics, ScanCyclePartialReason, ScanCycleWorkSnapshot, ScannerUsageSaveResult, ScannerWorkSource,
emit_scan_cycle_complete, emit_scan_cycle_deferred, emit_scan_cycle_partial_with_source, emit_scan_cycle_superseded,
global_metrics,
};
use rustfs_config::ScannerSpeed;
#[cfg(test)]
use rustfs_config::{
ENV_SCANNER_BITROT_CYCLE_SECS, ENV_SCANNER_CYCLE_MAX_DIRECTORIES, ENV_SCANNER_CYCLE_MAX_DURATION_SECS,
ENV_SCANNER_CYCLE_MAX_OBJECTS,
};
use rustfs_config::{ENV_SCANNER_CYCLE, ENV_SCANNER_SPEED, ENV_SCANNER_START_DELAY_SECS};
use rustfs_data_usage::observed_data_usage_is_newer;
use serde::{Deserialize, Serialize};
use sha2::{Digest as _, Sha256};
#[cfg(test)]
use tokio::sync::Notify;
use tokio::sync::mpsc;
use tokio::time::{Duration, Instant};
use tokio_util::sync::CancellationToken;
use tokio_util::task::AbortOnDropHandle;
use tracing::{debug, error, info, instrument, warn};
use crate::storage_api::scan::{
BucketOperations, BucketOptions, NamespaceLocking as _, SCANNER_ACTIVITY_LEGACY_PROTOCOL_VERSION,
SCANNER_ACTIVITY_PREVIOUS_PROTOCOL_VERSION, SCANNER_ACTIVITY_PROTOCOL_VERSION,
};
use crate::{
ECStore, EcstoreError, RUSTFS_META_BUCKET, ScannerLifecycleConfigExt as _, ScannerReplicationConfigExt as _,
get_lifecycle_config, get_replication_config, invalidate_admin_data_usage_snapshot_cache,
invalidate_data_usage_snapshot_cache, read_config, replace_bucket_usage_memory_from_info, save_config,
save_config_shared_with_preconditions, save_config_with_preconditions, scanner_is_erasure_sd,
};
const LOG_COMPONENT_SCANNER: &str = "scanner";
const LOG_SUBSYSTEM_RUNTIME: &str = "runtime";
const LOG_SUBSYSTEM_BACKGROUND_HEAL: &str = "background_heal";
const EVENT_SCANNER_CYCLE_STATE: &str = "scanner_cycle_state";
const EVENT_SCANNER_LOCK_STATE: &str = "scanner_lock_state";
const EVENT_SCANNER_PERSIST_STATE: &str = "scanner_persist_state";
const EVENT_SCANNER_RUNTIME_CONFIG: &str = "scanner_runtime_config";
const EVENT_SCANNER_BACKGROUND_HEAL_STATE: &str = "scanner_background_heal_state";
const METRIC_SCANNER_LEADER_LOCK_TOTAL: &str = "rustfs_scanner_leader_lock_total";
const CLEAN_IDLE_MAX_INTERVAL: Duration = Duration::from_secs(24 * 60 * 60);
const MAX_SCANNER_SCHEDULE_DELAY: Duration = Duration::from_secs(365 * 24 * 60 * 60);
const CLEAN_IDLE_BACKOFF_FACTOR: u32 = 2;
/// First-retry delay after a scanner cycle cannot publish authoritative usage.
///
/// A superseded cycle is the *expected* outcome of the dirty-usage fast path:
/// a write burst marks buckets dirty, the scanner wakes within milliseconds,
/// and the still-landing writes then supersede the snapshot it took. Charging
/// that first race a full cycle interval means a burst of writes surfaces in
/// usage/quota accounting roughly two cycles late (measured: ~120 s on an
/// otherwise idle instance whose clean-idle backoff had doubled a 60 s
/// interval), which defeats the fast path it is meant to protect.
///
/// The exponential growth in [`ScannerRetryBackoff::retry_interval`] is
/// what protects against a persistently hot bucket driving an unbroken
/// full-scan loop, so it can start small: 5 s, 10 s, 20 s … capped by
/// [`SCANNER_RETRY_MAX_INTERVAL`]. A one-off race recovers in seconds; a
/// genuinely hot bucket still reaches minute-scale backoff within a handful of
/// cycles. Preflight deferrals use the same bounded schedule so a temporarily
/// unavailable peer cannot drive a tight retry loop.
const SCANNER_RETRY_BASE_INTERVAL: Duration = Duration::from_secs(5);
const SCANNER_RETRY_MAX_INTERVAL: Duration = Duration::from_secs(30 * 60);
const SCANNER_LEADER_LOCK_POLL_INTERVAL: Duration = Duration::from_secs(1);
#[cfg(not(test))]
const SCANNER_LOCK_LOSS_SHUTDOWN_TIMEOUT: Duration = Duration::from_secs(30);
#[cfg(test)]
const SCANNER_LOCK_LOSS_SHUTDOWN_TIMEOUT: Duration = Duration::from_millis(50);
const MAINTENANCE_FEATURE_INSPECTION_TIMEOUT: Duration = Duration::from_secs(30);
const MAINTENANCE_FEATURE_INSPECTION_RETRY_BASE_INTERVAL: Duration = Duration::from_secs(5 * 60);
const MAINTENANCE_FEATURE_INSPECTION_RETRY_MAX_INTERVAL: Duration = Duration::from_secs(60 * 60);
const MAX_MAINTENANCE_FEATURE_INSPECTION_ATTEMPTS: usize = 2;
const SCANNER_PERSIST_CAS_RETRIES: usize = 2;
const DATA_USAGE_BACKUP_INTERVAL_CYCLES: u64 = 10;
const SCANNER_CYCLE_STATE_MAGIC: &[u8; 8] = b"RSCYC001";
const SCANNER_CYCLE_STATE_HEADER_LEN: usize = 24;
#[cfg(test)]
const ENV_SCANNER_START_DELAY_SECS_DEPRECATED: &str = "RUSTFS_DATA_SCANNER_START_DELAY_SECS";
#[cfg(test)]
type ScannerCycleStatePersistTestHook = (u64, Arc<Notify>);
#[cfg(test)]
static SCANNER_CYCLE_STATE_PERSIST_TEST_HOOK: LazyLock<StdMutex<Option<ScannerCycleStatePersistTestHook>>> =
LazyLock::new(|| StdMutex::new(None));
#[cfg(test)]
struct ScannerCycleStatePersistTestHookGuard;
#[cfg(test)]
impl Drop for ScannerCycleStatePersistTestHookGuard {
fn drop(&mut self) {
*SCANNER_CYCLE_STATE_PERSIST_TEST_HOOK
.lock()
.unwrap_or_else(|poisoned| poisoned.into_inner()) = None;
}
}
#[cfg(test)]
fn set_scanner_cycle_state_persist_test_hook(leader_epoch: u64, reached: Arc<Notify>) -> ScannerCycleStatePersistTestHookGuard {
*SCANNER_CYCLE_STATE_PERSIST_TEST_HOOK
.lock()
.unwrap_or_else(|poisoned| poisoned.into_inner()) = Some((leader_epoch, reached));
ScannerCycleStatePersistTestHookGuard
}
#[cfg(test)]
fn notify_scanner_cycle_state_persist_test_hook(leader_epoch: u64) {
let reached = SCANNER_CYCLE_STATE_PERSIST_TEST_HOOK
.lock()
.unwrap_or_else(|poisoned| poisoned.into_inner())
.as_ref()
.filter(|(expected_epoch, _)| *expected_epoch == leader_epoch)
.map(|(_, reached)| reached.clone());
if let Some(reached) = reached {
reached.notify_one();
}
}
#[derive(Clone, Copy, Debug, Serialize)]
#[non_exhaustive]
pub struct ScannerCycleScheduleStatus {
effective_interval_seconds: u64,
clean_idle_backoff_enabled: bool,
clean_idle_backoff_multiplier: u64,
superseded_retry_backoff_enabled: bool,
superseded_cycles: u32,
}
impl Default for ScannerCycleScheduleStatus {
fn default() -> Self {
Self {
effective_interval_seconds: 0,
clean_idle_backoff_enabled: false,
clean_idle_backoff_multiplier: 1,
superseded_retry_backoff_enabled: false,
superseded_cycles: 0,
}
}
}
impl ScannerCycleScheduleStatus {
pub fn effective_interval_seconds(self) -> u64 {
self.effective_interval_seconds
}
}
static SCANNER_CYCLE_SCHEDULE: LazyLock<RwLock<ScannerCycleScheduleStatus>> =
LazyLock::new(|| RwLock::new(ScannerCycleScheduleStatus::default()));
pub fn scanner_cycle_schedule_status() -> ScannerCycleScheduleStatus {
*SCANNER_CYCLE_SCHEDULE.read().unwrap_or_else(|poisoned| poisoned.into_inner())
}
fn record_scanner_cycle_schedule(
effective_interval: Duration,
clean_idle_backoff_enabled: bool,
clean_idle_backoff_multiplier: u64,
superseded_retry_backoff_enabled: bool,
superseded_cycles: u32,
) {
let effective_interval_seconds = effective_interval
.as_secs()
.saturating_add(u64::from(effective_interval.subsec_nanos() != 0));
let mut schedule = SCANNER_CYCLE_SCHEDULE
.write()
.unwrap_or_else(|poisoned| poisoned.into_inner());
*schedule = ScannerCycleScheduleStatus {
effective_interval_seconds,
clean_idle_backoff_enabled,
clean_idle_backoff_multiplier: clean_idle_backoff_multiplier.max(1),
superseded_retry_backoff_enabled,
superseded_cycles,
};
}
fn reset_scanner_cycle_schedule() {
record_scanner_cycle_schedule(Duration::ZERO, false, 1, false, 0);
}
/// Returns the base cycle interval.
/// Priority order:
/// 1. RUSTFS_SCANNER_CYCLE (if set, overrides everything)
/// 2. RUSTFS_SCANNER_START_DELAY_SECS (for backward compatibility)
/// 3. Deployment-specific default cycle override
/// 4. RUSTFS_SCANNER_SPEED preset
#[cfg(test)]
fn cycle_interval() -> Duration {
resolve_scanner_runtime_config().cycle_interval
}
fn scanner_cycle_budget_config() -> ScannerCycleBudgetConfig {
resolve_scanner_runtime_config().cycle_budget
}
fn record_scanner_leader_lock_state(state: &'static str) {
metrics::counter!(
METRIC_SCANNER_LEADER_LOCK_TOTAL,
"state" => state
)
.increment(1);
}
#[cfg(test)]
fn scanner_cycle_max_duration() -> Option<Duration> {
resolve_scanner_runtime_config().cycle_budget.max_duration
}
fn resolve_scanner_runtime_config() -> crate::runtime_config::ScannerRuntimeConfig {
#[cfg(test)]
{
crate::runtime_config::resolve_scanner_runtime_config_from_global()
}
#[cfg(not(test))]
{
crate::runtime_config::current_scanner_runtime_config()
}
}
fn scan_cycle_partial_reason(reason: Option<ScannerCycleBudgetReason>) -> ScanCyclePartialReason {
match reason {
Some(ScannerCycleBudgetReason::Runtime) => ScanCyclePartialReason::Runtime,
Some(ScannerCycleBudgetReason::Objects) => ScanCyclePartialReason::Objects,
Some(ScannerCycleBudgetReason::Directories) => ScanCyclePartialReason::Directories,
None => ScanCyclePartialReason::Unknown,
}
}
fn scan_cycle_partial_source(reason: Option<ScannerCycleBudgetReason>) -> Option<ScannerWorkSource> {
match reason {
Some(ScannerCycleBudgetReason::Objects | ScannerCycleBudgetReason::Directories) => Some(ScannerWorkSource::Usage),
Some(ScannerCycleBudgetReason::Runtime) | None => None,
}
}
/// Compute a randomized inter-cycle sleep.
// Delay is scan interval +- 10%, with a floor of 1 second.
fn randomized_cycle_delay() -> Duration {
randomized_cycle_delay_for(scanner_cycle_interval())
}
fn randomized_cycle_delay_for(interval: Duration) -> Duration {
let interval = interval.max(Duration::from_secs(1)).min(MAX_SCANNER_SCHEDULE_DELAY);
// Uniform in [-0.1, 0.1), keeping actual delay within 10% of interval.
let jitter_factor = (rand::random::<f64>() * 0.2) - 0.1;
let delay = interval.mul_f64(1.0 + jitter_factor);
delay.max(Duration::from_secs(1)).min(MAX_SCANNER_SCHEDULE_DELAY)
}
fn cap_clean_idle_cycle_delay(delay: Duration, max_interval: Duration, enabled: bool) -> Duration {
if !enabled {
return delay;
}
let max_interval = max_interval.max(Duration::from_secs(1));
if delay <= max_interval {
return delay;
}
// Reflect positive jitter below the cap instead of collapsing every
// positive sample onto the same instant once backoff reaches its ceiling.
max_interval
.saturating_sub(delay.saturating_sub(max_interval))
.max(Duration::from_secs(1))
}
fn initial_scanner_delay_for(start_delay_secs: Option<u64>) -> Duration {
start_delay_secs
.map(|secs| randomized_cycle_delay_for(Duration::from_secs(secs)))
.unwrap_or_else(randomized_cycle_delay)
}
fn initial_scanner_delay_for_startup(
start_delay_secs: Option<u64>,
usage_cache_is_cold: bool,
has_buckets: bool,
has_active_replication: bool,
) -> Duration {
// Skip the startup delay when the cache is cold (first ever scan) OR when active replication
// rules exist. A cold usage cache also covers startup-before-bucket-creation: running the
// first cycle promptly keeps later bucket metrics bounded by the normal scanner cycle instead
// of an extra startup delay. Replication config is live-read at startup by
// configure_scanner_defaults, so this signal is always current regardless of when the persisted
// DataUsageInfo was last written.
if usage_cache_is_cold || (has_active_replication && has_buckets) {
Duration::ZERO
} else {
initial_scanner_delay_for(start_delay_secs)
}
}
fn data_usage_info_is_cold(info: &DataUsageInfo) -> bool {
!info.is_complete_bucket_usage_snapshot()
}
fn usage_cache_needs_prompt_scan(authoritative: &DataUsageInfo, observed: Option<&DataUsageInfo>) -> bool {
data_usage_info_is_cold(authoritative)
|| observed.is_some_and(|observed| observed_data_usage_is_newer(observed, authoritative))
}
async fn read_data_usage_config_for_startup(storeapi: &Arc<impl ScannerObjectIO>) -> Result<Option<Vec<u8>>, EcstoreError> {
async fn read_pair(storeapi: &Arc<impl ScannerObjectIO>, primary_path: &str) -> Result<Option<Vec<u8>>, EcstoreError> {
match read_config(storeapi.clone(), primary_path).await {
Ok(data) => Ok(Some(data)),
Err(EcstoreError::ConfigNotFound) => {
let backup_path = format!("{primary_path}.bkp");
match read_config(storeapi.clone(), backup_path.as_str()).await {
Ok(data) => Ok(Some(data)),
Err(EcstoreError::ConfigNotFound) => Ok(None),
Err(err) => Err(err),
}
}
Err(err) => Err(err),
}
}
for path in [DATA_USAGE_OBJ_NAME_PATH.as_str(), LEGACY_DATA_USAGE_OBJ_NAME_PATH.as_str()] {
if let Some(data) = read_pair(storeapi, path).await? {
return Ok(Some(data));
}
}
Ok(None)
}
fn data_usage_backup_due(data_usage_info: &DataUsageInfo) -> bool {
data_usage_info
.scanner_cycle
.is_some_and(|cycle| cycle % DATA_USAGE_BACKUP_INTERVAL_CYCLES == 0)
}
async fn sync_data_usage_backup_from_primary(
ctx: &CancellationToken,
storeapi: Arc<impl ScannerObjectIO>,
) -> Result<(), EcstoreError> {
let backup_path = format!("{}.bkp", DATA_USAGE_OBJ_NAME_PATH.as_str());
for retry in 0..=SCANNER_PERSIST_CAS_RETRIES {
if ctx.is_cancelled() {
return Ok(());
}
let (primary, _) = read_config_with_revision(storeapi.clone(), DATA_USAGE_OBJ_NAME_PATH.as_str()).await?;
let primary = primary.ok_or_else(|| EcstoreError::other("authoritative data usage snapshot is missing"))?;
serde_json::from_slice::<DataUsageInfo>(&primary)
.map_err(|err| EcstoreError::other(format!("authoritative data usage snapshot is invalid: {err}")))?;
let primary = Bytes::from(primary);
let (backup, revision) = read_config_with_revision(storeapi.clone(), &backup_path).await?;
if backup.as_deref() == Some(primary.as_ref()) {
return Ok(());
}
let sha256hex = Some(hex_simd::encode_to_string(Sha256::digest(&primary), hex_simd::AsciiCase::Lower));
let save_result = save_config_shared_with_preconditions(
storeapi.clone(),
&backup_path,
primary.clone(),
sha256hex,
revision.preconditions(),
)
.await;
match save_result {
Ok(_) => {}
Err(err) => {
let (observed, _) = read_config_with_revision(storeapi.clone(), &backup_path).await?;
if observed.as_deref() == Some(primary.as_ref()) {
// The write committed even though the response was lost.
} else if err == EcstoreError::PreconditionFailed && retry < SCANNER_PERSIST_CAS_RETRIES {
continue;
} else {
return Err(err);
}
}
}
let (current_primary, _) = read_config_with_revision(storeapi.clone(), DATA_USAGE_OBJ_NAME_PATH.as_str()).await?;
if current_primary.as_deref() == Some(primary.as_ref()) {
return Ok(());
}
if retry < SCANNER_PERSIST_CAS_RETRIES {
continue;
}
}
Err(EcstoreError::other(
"authoritative data usage snapshot changed while synchronizing its backup",
))
}
async fn persisted_usage_cache_is_cold_for_startup(storeapi: &Arc<ECStore>) -> bool {
let Some(data) = (match read_data_usage_config_for_startup(storeapi).await {
Ok(data) => data,
Err(err) => {
warn!(
target: "rustfs::scanner",
event = EVENT_SCANNER_PERSIST_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
path = %DATA_USAGE_OBJ_NAME_PATH.as_str(),
state = "startup_inspect_failed",
error = %err,
"Scanner startup cache inspection failed"
);
return false;
}
}) else {
return true;
};
match serde_json::from_slice::<DataUsageInfo>(&data) {
Ok(info) => {
if data_usage_info_is_cold(&info) {
return true;
}
match read_config(storeapi.clone(), DATA_USAGE_OBSERVED_OBJ_NAME_PATH.as_str()).await {
Ok(observed) => match serde_json::from_slice::<DataUsageInfo>(&observed) {
Ok(observed) => usage_cache_needs_prompt_scan(&info, Some(&observed)),
Err(err) => {
warn!(
target: "rustfs::scanner",
event = EVENT_SCANNER_PERSIST_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
path = %DATA_USAGE_OBSERVED_OBJ_NAME_PATH.as_str(),
state = "startup_observed_decode_failed",
error = %err,
"Scanner startup found an invalid observational snapshot and will refresh it promptly"
);
true
}
},
Err(EcstoreError::ConfigNotFound) => false,
Err(err) => {
warn!(
target: "rustfs::scanner",
event = EVENT_SCANNER_PERSIST_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
path = %DATA_USAGE_OBSERVED_OBJ_NAME_PATH.as_str(),
state = "startup_observed_inspect_failed",
error = %err,
"Scanner startup could not inspect the observational snapshot"
);
false
}
}
}
Err(err) => {
warn!(
target: "rustfs::scanner",
event = EVENT_SCANNER_PERSIST_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
path = %DATA_USAGE_OBJ_NAME_PATH.as_str(),
state = "startup_decode_failed",
error = %err,
"Scanner startup cache decode failed"
);
true
}
}
}
async fn initial_scanner_startup_usage_state(storeapi: &Arc<ECStore>) -> (bool, bool) {
let has_buckets = match storeapi
.list_bucket(&BucketOptions {
no_metadata: true,
..Default::default()
})
.await
{
Ok(buckets) => !buckets.is_empty(),
Err(err) => {
warn!(
target: "rustfs::scanner",
event = EVENT_SCANNER_RUNTIME_CONFIG,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
state = "startup_bucket_inspect_failed",
error = %err,
"Scanner startup bucket inspection failed"
);
false
}
};
(persisted_usage_cache_is_cold_for_startup(storeapi).await, has_buckets)
}
pub async fn init_data_scanner(ctx: CancellationToken, storeapi: Arc<ECStore>) {
let (startup_features, startup_maintenance_generation) = configure_scanner_defaults(&ctx, &storeapi).await;
// Force init global sleeper so config is read once at startup.
let _ = &*SCANNER_SLEEPER;
if let Err(err) = refresh_scanner_runtime_config_from_global() {
warn!(
target: "rustfs::scanner",
event = EVENT_SCANNER_RUNTIME_CONFIG,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
state = "startup_apply_failed",
error = %err,
"Scanner runtime config apply failed at startup"
);
}
let replication_active = startup_features.replication;
let ctx_clone = ctx;
let storeapi_clone = storeapi;
let runtime_guard = ScannerRuntimeGuard::new();
tokio::spawn(async move {
let _runtime_guard = runtime_guard;
let (usage_cache_is_cold, has_buckets) = initial_scanner_startup_usage_state(&storeapi_clone).await;
let sleep_time = initial_scanner_delay_for_startup(
scanner_start_delay().map(|duration| duration.as_secs()),
usage_cache_is_cold,
has_buckets,
replication_active,
);
if sleep_time.is_zero() {
let skip_reason = if usage_cache_is_cold {
"usage_cache_cold"
} else {
"replication_active"
};
info!(
target: "rustfs::scanner",
event = EVENT_SCANNER_CYCLE_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
state = "startup_delay_skipped",
reason = skip_reason,
"Scanner startup delay skipped"
);
} else {
tokio::time::sleep(sleep_time).await;
}
loop {
if ctx_clone.is_cancelled() {
break;
}
if let Err(e) = run_data_scanner_with_maintenance_state(
ctx_clone.clone(),
storeapi_clone.clone(),
startup_features,
startup_maintenance_generation,
)
.await
{
error!(
target: "rustfs::scanner",
event = EVENT_SCANNER_CYCLE_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
state = "run_failed",
error = %e,
"Scanner runtime iteration failed"
);
}
// Backoff before retrying after lock contention or scanner-level failures.
// Keep this cancellation-aware so shutdown is not delayed by backoff sleep.
tokio::select! {
_ = ctx_clone.cancelled() => break,
_ = tokio::time::sleep(randomized_cycle_delay()) => {}
}
}
});
}
#[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]
struct ScannerMaintenanceFeatures {
lifecycle: bool,
replication: bool,
inspection_failed: bool,
}
impl ScannerMaintenanceFeatures {
fn needs_regular_cycle(self) -> bool {
self.lifecycle || self.replication || self.inspection_failed
}
}
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
enum MaintenanceInspectionDecision {
Accept,
Retry,
PreserveBaseCycle,
}
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
enum MaintenanceInspectionAttempt {
Completed(ScannerMaintenanceFeatures),
TimedOut,
Cancelled,
}
async fn wait_for_maintenance_feature_inspection<F>(
ctx: &CancellationToken,
inspection: F,
timeout: Duration,
) -> MaintenanceInspectionAttempt
where
F: Future<Output = ScannerMaintenanceFeatures>,
{
tokio::select! {
_ = ctx.cancelled() => MaintenanceInspectionAttempt::Cancelled,
result = tokio::time::timeout(timeout, inspection) => match result {
Ok(features) => MaintenanceInspectionAttempt::Completed(features),
Err(_) => MaintenanceInspectionAttempt::TimedOut,
},
}
}
fn maintenance_inspection_decision(generation: u64, current_generation: u64, attempts: usize) -> MaintenanceInspectionDecision {
if generation == current_generation {
MaintenanceInspectionDecision::Accept
} else if attempts < MAX_MAINTENANCE_FEATURE_INSPECTION_ATTEMPTS {
MaintenanceInspectionDecision::Retry
} else {
MaintenanceInspectionDecision::PreserveBaseCycle
}
}
fn single_disk_default_speed() -> ScannerSpeed {
ScannerSpeed::Default
}
async fn detect_scanner_maintenance_features(storeapi: &Arc<ECStore>) -> ScannerMaintenanceFeatures {
let mut features = ScannerMaintenanceFeatures::default();
let buckets = match storeapi
.list_bucket(&BucketOptions {
no_metadata: true,
..Default::default()
})
.await
{
Ok(buckets) => buckets,
Err(err) => {
warn!(
target: "rustfs::scanner",
event = EVENT_SCANNER_RUNTIME_CONFIG,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
state = "maintenance_feature_inspect_failed",
error = %err,
"Scanner maintenance feature inspection failed; preserving speed-based cycle"
);
features.inspection_failed = true;
return features;
}
};
for bucket in buckets {
if !features.lifecycle {
match get_lifecycle_config(&bucket.name).await {
Ok((lifecycle, _)) => {
features.lifecycle = lifecycle.has_active_rules("");
}
Err(EcstoreError::ConfigNotFound) => {}
Err(err) => {
warn!(
target: "rustfs::scanner",
event = EVENT_SCANNER_RUNTIME_CONFIG,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
bucket = %bucket.name,
state = "lifecycle_inspect_failed",
error = %err,
"Scanner lifecycle inspection failed; preserving speed-based cycle"
);
features.inspection_failed = true;
}
}
}
if !features.replication {
match get_replication_config(&bucket.name).await {
Ok((replication, _)) => {
features.replication = replication.has_active_rules("", true);
}
Err(EcstoreError::ConfigNotFound) => {}
Err(err) => {
warn!(
target: "rustfs::scanner",
event = EVENT_SCANNER_RUNTIME_CONFIG,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
bucket = %bucket.name,
state = "replication_inspect_failed",
error = %err,
"Scanner replication inspection failed; preserving speed-based cycle"
);
features.inspection_failed = true;
}
}
}
if features.needs_regular_cycle() {
break;
}
}
features
}
async fn detect_stable_scanner_maintenance_features(
ctx: &CancellationToken,
storeapi: &Arc<ECStore>,
) -> Option<(ScannerMaintenanceFeatures, u64)> {
detect_stable_scanner_maintenance_features_with(
ctx,
|| detect_scanner_maintenance_features(storeapi),
MAINTENANCE_FEATURE_INSPECTION_TIMEOUT,
)
.await
}
async fn detect_stable_scanner_maintenance_features_with<F, Fut>(
ctx: &CancellationToken,
mut inspect: F,
timeout: Duration,
) -> Option<(ScannerMaintenanceFeatures, u64)>
where
F: FnMut() -> Fut,
Fut: Future<Output = ScannerMaintenanceFeatures>,
{
let mut attempts = 0usize;
loop {
attempts += 1;
let generation = scanner_maintenance_generation();
let mut features = match wait_for_maintenance_feature_inspection(ctx, inspect(), timeout).await {
MaintenanceInspectionAttempt::Completed(features) => features,
MaintenanceInspectionAttempt::Cancelled => return None,
MaintenanceInspectionAttempt::TimedOut => {
warn!(
target: "rustfs::scanner",
event = EVENT_SCANNER_RUNTIME_CONFIG,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
timeout = ?timeout,
state = "maintenance_feature_inspection_timed_out",
"Scanner maintenance feature inspection timed out; preserving the base cycle"
);
ScannerMaintenanceFeatures {
inspection_failed: true,
..Default::default()
}
}
};
let current_generation = scanner_maintenance_generation();
match maintenance_inspection_decision(generation, current_generation, attempts) {
MaintenanceInspectionDecision::Accept => return Some((features, current_generation)),
MaintenanceInspectionDecision::Retry => {}
MaintenanceInspectionDecision::PreserveBaseCycle => {
features.inspection_failed = true;
warn!(
target: "rustfs::scanner",
event = EVENT_SCANNER_RUNTIME_CONFIG,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
attempts = MAX_MAINTENANCE_FEATURE_INSPECTION_ATTEMPTS,
state = "maintenance_feature_inspection_unstable",
"Scanner maintenance configuration changed repeatedly during inspection; preserving the base cycle"
);
return Some((features, current_generation));
}
}
}
}
async fn configure_scanner_defaults(
ctx: &CancellationToken,
storeapi: &Arc<ECStore>,
) -> (ScannerMaintenanceFeatures, Option<u64>) {
if storeapi.setup_is_erasure_sd().await {
let (features, maintenance_generation) = detect_stable_scanner_maintenance_features(ctx, storeapi)
.await
.unwrap_or_else(|| {
(
ScannerMaintenanceFeatures {
inspection_failed: true,
..Default::default()
},
scanner_maintenance_generation(),
)
});
// Single-disk keeps the speed-preset-derived default cycle (60s at the
// `default` preset) instead of a special shorter cycle: no measured
// cold-start ILM latency basis for an override, and clean-idle backoff
// already stretches idle cadence. Decision record: backlog#1878 (HS-16).
set_scanner_default_speed(single_disk_default_speed());
set_scanner_default_cycle_secs(None);
info!(
target: "rustfs::scanner",
event = EVENT_SCANNER_RUNTIME_CONFIG,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
env_speed = ENV_SCANNER_SPEED,
env_cycle = ENV_SCANNER_CYCLE,
env_start_delay = ENV_SCANNER_START_DELAY_SECS,
lifecycle_active = features.lifecycle,
replication_active = features.replication,
feature_inspection_failed = features.inspection_failed,
state = "single_disk_defaults_applied",
"Scanner defaults applied"
);
(features, Some(maintenance_generation))
} else {
set_scanner_default_speed(ScannerSpeed::Default);
set_scanner_default_cycle_secs(None);
(ScannerMaintenanceFeatures::default(), None)
}
}
#[cfg(test)]
fn bitrot_scan_cycle() -> Option<Duration> {
resolve_scanner_runtime_config().bitrot_cycle
}
fn get_cycle_scan_mode(
current_cycle: u64,
bitrot_start_cycle: u64,
bitrot_start_time: Option<DateTime<Utc>>,
bitrot_cycle: Option<Duration>,
) -> HealScanMode {
let Some(bitrot_cycle) = bitrot_cycle else {
return HealScanMode::Normal;
};
if bitrot_cycle.is_zero() {
return HealScanMode::Deep;
}
if current_cycle.saturating_sub(bitrot_start_cycle) < heal_object_select_prob() as u64 {
return HealScanMode::Deep;
}
let Some(bitrot_start_time) = bitrot_start_time else {
return HealScanMode::Deep;
};
let elapsed = Utc::now()
.signed_duration_since(bitrot_start_time)
.to_std()
.unwrap_or(Duration::ZERO);
if elapsed >= bitrot_cycle {
HealScanMode::Deep
} else {
HealScanMode::Normal
}
}
fn background_heal_info_for_scan_start(
mut info: BackgroundHealInfo,
current_cycle: u64,
scan_mode: HealScanMode,
now: DateTime<Utc>,
bitrot_cycle: Option<Duration>,
) -> Option<BackgroundHealInfo> {
let reset_bitrot_start =
scan_mode == HealScanMode::Deep && should_reset_bitrot_start(&info, current_cycle, now, bitrot_cycle);
if info.current_scan_mode == scan_mode && !reset_bitrot_start {
return None;
}
info.current_scan_mode = scan_mode;
if reset_bitrot_start {
info.bitrot_start_cycle = current_cycle;
info.bitrot_start_time = Some(now);
}
Some(info)
}
fn should_reset_bitrot_start(
info: &BackgroundHealInfo,
current_cycle: u64,
now: DateTime<Utc>,
bitrot_cycle: Option<Duration>,
) -> bool {
let Some(bitrot_start_time) = info.bitrot_start_time else {
return true;
};
let Some(bitrot_cycle) = bitrot_cycle else {
return false;
};
if bitrot_cycle.is_zero() {
return true;
}
if current_cycle.saturating_sub(info.bitrot_start_cycle) < heal_object_select_prob() as u64 {
return false;
}
let elapsed = now
.signed_duration_since(bitrot_start_time)
.to_std()
.unwrap_or(Duration::ZERO);
elapsed >= bitrot_cycle
}
fn background_heal_info_for_scan_complete(mut info: BackgroundHealInfo, scan_mode: HealScanMode) -> Option<BackgroundHealInfo> {
if scan_mode != HealScanMode::Deep || info.current_scan_mode != HealScanMode::Deep {
return None;
}
info.current_scan_mode = HealScanMode::Normal;
Some(info)
}
fn background_heal_info_for_scan_result(
info: BackgroundHealInfo,
scan_mode: HealScanMode,
success: bool,
) -> Option<BackgroundHealInfo> {
if !success {
return None;
}
background_heal_info_for_scan_complete(info, scan_mode)
}
fn retain_recent_cycle_completions(cycle_completed: &mut Vec<DateTime<Utc>>) {
let keep = data_usage_update_dir_cycles() as usize;
if cycle_completed.len() > keep {
let drop_count = cycle_completed.len() - keep;
cycle_completed.drain(..drop_count);
}
}
/// Get lock acquire timeout from environment variable RUSTFS_LOCK_ACQUIRE_TIMEOUT (in seconds)
/// Defaults to 5 seconds if not set or invalid
/// For distributed environments with multiple nodes, a longer timeout may be needed
fn get_lock_acquire_timeout() -> Duration {
Duration::from_secs(rustfs_utils::get_env_u64("RUSTFS_LOCK_ACQUIRE_TIMEOUT", 5))
}
fn data_usage_persist_timeout() -> Duration {
DataUsageCache::persistence_timeout()
}
async fn mark_scan_cycle_idle(cycle_info: &mut CurrentCycle, cycle_metrics_guard: &mut ScannerCycleMetricsGuard) {
cycle_info.current = 0;
global_metrics().clear_current_scan_mode();
cycle_metrics_guard.finish(cycle_info.clone()).await;
}
#[instrument(skip_all)]
#[hotpath::measure]
async fn run_data_scanner_cycle(
ctx: &CancellationToken,
storeapi: &Arc<ECStore>,
cycle_info: &mut CurrentCycle,
cycle_revision: &mut DataUsageCacheRevision,
leader_epoch: u64,
) -> ScannerCycleOutcome {
let _activity_guard = ScannerActivityGuard::new();
if let Err(err) = refresh_scanner_runtime_config_from_global() {
warn!(
target: "rustfs::scanner",
event = EVENT_SCANNER_RUNTIME_CONFIG,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
state = "refresh_failed",
error = %err,
"Scanner runtime config refresh failed"
);
}
let configured_cycle_interval = scanner_cycle_interval();
let configured_bitrot_cycle = scanner_bitrot_cycle();
let cycle_budget_config = scanner_cycle_budget_config();
let usage_persist_timeout = data_usage_persist_timeout();
global_metrics().record_scanner_cycle_config(
configured_cycle_interval,
configured_bitrot_cycle,
cycle_budget_config.max_duration,
cycle_budget_config.max_objects,
cycle_budget_config.max_directories,
);
cycle_info.current = cycle_info.next;
let now = Instant::now();
cycle_info.started = Utc::now();
let mut cycle_metrics_guard = ScannerCycleMetricsGuard::new(cycle_info.clone()).await;
let mut background_heal_info = read_background_heal_info(storeapi.clone()).await;
let scan_mode = get_cycle_scan_mode(
cycle_info.current,
background_heal_info.bitrot_start_cycle,
background_heal_info.bitrot_start_time,
configured_bitrot_cycle,
);
info!(
target: "rustfs::scanner",
event = EVENT_SCANNER_CYCLE_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
cycle = cycle_info.current,
scan_mode = ?scan_mode,
state = "started",
"Scanner cycle started"
);
let _scan_mode_guard = ScannerScanModeGuard::new(scan_mode);
if let Some(new_heal_info) = background_heal_info_for_scan_start(
background_heal_info.clone(),
cycle_info.current,
scan_mode,
Utc::now(),
configured_bitrot_cycle,
) {
background_heal_info = new_heal_info.clone();
save_background_heal_info(storeapi.clone(), new_heal_info).await;
}
let cycle_start = std::time::Instant::now();
let usage_persist_baseline = match read_config_with_revision(storeapi.clone(), DATA_USAGE_OBJ_NAME_PATH.as_str()).await {
Ok((data, revision)) => DataUsagePersistBaseline {
data: data.map(Bytes::from),
revision,
},
Err(err) => {
error!(
target: "rustfs::scanner",
event = EVENT_SCANNER_PERSIST_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
cycle = cycle_info.current,
path = %DATA_USAGE_OBJ_NAME_PATH.as_str(),
state = "usage_baseline_load_failed",
error = %err,
"Scanner cycle could not capture the data usage persistence baseline"
);
emit_scan_cycle_complete(false, cycle_start.elapsed());
mark_scan_cycle_idle(cycle_info, &mut cycle_metrics_guard).await;
return ScannerCycleOutcome::Failed;
}
};
let (sender, receiver) = mpsc::channel::<DataUsageInfo>(1);
let storeapi_clone = storeapi.clone();
let ctx_clone = ctx.clone();
let mut usage_persist_task = AbortOnDropHandle::new(tokio::spawn(async move {
store_data_usage_in_backend_with_outcome_for_epoch_and_baseline(
ctx_clone,
storeapi_clone,
receiver,
Some(leader_epoch),
Some(usage_persist_baseline),
)
.await
}));
let done_cycle = Metrics::time(Metric::ScanCycle);
let cycle_budget = ScannerCycleBudget::new(ctx, cycle_budget_config);
let scan_result = storeapi
.clone()
.nsscanner_with_status(
cycle_budget.token(),
cycle_budget.clone(),
sender,
cycle_info.current,
leader_epoch,
scan_mode,
)
.await;
let budget_elapsed = cycle_budget.budget_elapsed() && !ctx.is_cancelled();
let usage_persist_outcome = match wait_for_data_usage_persist_task(ctx, &mut usage_persist_task, usage_persist_timeout).await
{
DataUsagePersistTaskResult::Completed(outcome) => outcome,
DataUsagePersistTaskResult::JoinFailed(err) => {
error!(
target: "rustfs::scanner",
event = EVENT_SCANNER_PERSIST_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
cycle = cycle_info.current,
state = "usage_persist_task_failed",
error = %err,
"Scanner data usage persistence task failed"
);
DataUsagePersistOutcome::Failed
}
DataUsagePersistTaskResult::Cancelled => {
debug!(
target: "rustfs::scanner",
event = EVENT_SCANNER_PERSIST_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
cycle = cycle_info.current,
state = "usage_persist_task_cancelled",
"Scanner data usage persistence task cancelled"
);
DataUsagePersistOutcome::Failed
}
DataUsagePersistTaskResult::TimedOut => {
error!(
target: "rustfs::scanner",
event = EVENT_SCANNER_PERSIST_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
cycle = cycle_info.current,
timeout = ?usage_persist_timeout,
state = "usage_persist_task_timed_out",
"Scanner data usage persistence task timed out"
);
DataUsagePersistOutcome::Failed
}
};
let unresolved_heal_work = global_metrics().current_scan_cycle_has_unresolved_heal_work();
let scan_cycle_result = match scan_result {
Ok(result) => result,
Err(e) => {
error!(
target: "rustfs::scanner",
event = EVENT_SCANNER_CYCLE_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
cycle = cycle_info.current,
scan_mode = ?scan_mode,
state = "failed",
duration = ?now.elapsed(),
error = %e,
"Scanner cycle failed"
);
emit_scan_cycle_complete(false, cycle_start.elapsed());
if !ctx.is_cancelled()
&& let Some(new_heal_info) = background_heal_info_for_scan_result(background_heal_info.clone(), scan_mode, false)
{
save_background_heal_info(storeapi.clone(), new_heal_info).await;
}
mark_scan_cycle_idle(cycle_info, &mut cycle_metrics_guard).await;
return ScannerCycleOutcome::Failed;
}
};
if ctx.is_cancelled() {
debug!(
target: "rustfs::scanner",
event = EVENT_SCANNER_CYCLE_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
cycle = cycle_info.current,
state = "cancelled_before_commit",
"Scanner cycle stopped before committing cycle state"
);
emit_scan_cycle_complete(false, cycle_start.elapsed());
mark_scan_cycle_idle(cycle_info, &mut cycle_metrics_guard).await;
return ScannerCycleOutcome::Failed;
}
if let Some(required_cycle) = scan_cycle_result.required_cycle_floor() {
warn!(
target: "rustfs::scanner",
event = EVENT_SCANNER_CYCLE_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
cycle = cycle_info.current,
required_cycle,
state = "cache_cycle_ahead",
"Scanner cycle is recovering to a newer durable cache generation"
);
emit_scan_cycle_partial_with_source(cycle_start.elapsed(), ScanCyclePartialReason::Unknown, None);
return if persist_required_scanner_cycle_floor(
ctx,
storeapi.clone(),
cycle_info,
cycle_revision,
leader_epoch,
required_cycle,
&mut cycle_metrics_guard,
)
.await
{
ScannerCycleOutcome::Partial
} else {
ScannerCycleOutcome::Failed
};
}
if usage_persist_outcome == DataUsagePersistOutcome::Failed {
error!(
target: "rustfs::scanner",
event = EVENT_SCANNER_PERSIST_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
cycle = cycle_info.current,
state = "usage_not_durable",
"Scanner cycle completed without a durable data usage snapshot"
);
emit_scan_cycle_complete(false, cycle_start.elapsed());
mark_scan_cycle_idle(cycle_info, &mut cycle_metrics_guard).await;
return ScannerCycleOutcome::Failed;
}
if budget_elapsed {
warn!(
target: "rustfs::scanner",
event = EVENT_SCANNER_CYCLE_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
cycle = cycle_info.current,
duration = ?now.elapsed(),
reason = ?cycle_budget.reason(),
max_duration = ?cycle_budget.max_duration(),
max_objects = ?cycle_budget.max_objects(),
max_directories = ?cycle_budget.max_directories(),
state = "budget_reached",
"Scanner cycle budget reached"
);
let budget_reason = cycle_budget.reason();
emit_scan_cycle_partial_with_source(
cycle_start.elapsed(),
scan_cycle_partial_reason(budget_reason),
scan_cycle_partial_source(budget_reason),
);
return if finalize_partial_scan_cycle(
ctx,
storeapi.clone(),
cycle_info,
cycle_revision,
leader_epoch,
&mut cycle_metrics_guard,
)
.await
{
ScannerCycleOutcome::Partial
} else {
ScannerCycleOutcome::Failed
};
}
let (completion_outcome, scanner_pending_maintenance_work, remote_dirty_usage_acknowledgements) =
finalize_scanner_cycle_result(scan_cycle_result, usage_persist_outcome);
let remote_dirty_usage_pending = if remote_dirty_usage_acknowledgements.is_empty() {
false
} else if let Some(notification_system) = storeapi.notification_system() {
let acknowledgement_count = remote_dirty_usage_acknowledgements.len();
let acknowledgements = remote_dirty_usage_acknowledgements
.into_iter()
.map(|acknowledgement| (acknowledgement.host, acknowledgement.instance_id, acknowledgement.generation))
.collect();
remote_dirty_usage_acknowledgement_pending(
cycle_info.current,
acknowledgement_count,
notification_system.acknowledge_scanner_dirty_usage(acknowledgements),
)
.await
} else {
warn!(
target: "rustfs::scanner",
event = EVENT_SCANNER_PERSIST_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
cycle = cycle_info.current,
state = "remote_dirty_usage_acknowledgement_unavailable",
"Scanner cycle cannot acknowledge remote dirty usage without a notification system"
);
true
};
let pending_maintenance_work = scanner_pending_maintenance_work || unresolved_heal_work || remote_dirty_usage_pending;
match completion_outcome {
ScannerCycleOutcome::Failed => {
error!(
target: "rustfs::scanner",
event = EVENT_SCANNER_PERSIST_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
cycle = cycle_info.current,
outcome = ?usage_persist_outcome,
state = "usage_not_durable",
"Scanner cycle completed without a durable data usage snapshot"
);
emit_scan_cycle_complete(false, cycle_start.elapsed());
mark_scan_cycle_idle(cycle_info, &mut cycle_metrics_guard).await;
return ScannerCycleOutcome::Failed;
}
ScannerCycleOutcome::Partial => {
if ctx.is_cancelled() {
debug!(
target: "rustfs::scanner",
event = EVENT_SCANNER_CYCLE_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
cycle = cycle_info.current,
state = "incomplete_cancelled",
"Scanner cycle stopped before a complete usage snapshot was produced"
);
} else {
warn!(
target: "rustfs::scanner",
event = EVENT_SCANNER_CYCLE_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
cycle = cycle_info.current,
state = "incomplete",
"Scanner cycle ended without a complete usage snapshot"
);
}
emit_scan_cycle_partial_with_source(cycle_start.elapsed(), ScanCyclePartialReason::Unknown, None);
return if finalize_partial_scan_cycle(
ctx,
storeapi.clone(),
cycle_info,
cycle_revision,
leader_epoch,
&mut cycle_metrics_guard,
)
.await
{
ScannerCycleOutcome::Partial
} else {
ScannerCycleOutcome::Failed
};
}
ScannerCycleOutcome::Deferred(reason) => {
info!(
target: "rustfs::scanner",
event = EVENT_SCANNER_CYCLE_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
cycle = cycle_info.current,
reason = reason.as_str(),
state = "deferred",
"Scanner cycle deferred before usage scanning began"
);
emit_scan_cycle_deferred(cycle_start.elapsed());
mark_scan_cycle_idle(cycle_info, &mut cycle_metrics_guard).await;
return ScannerCycleOutcome::Deferred(reason);
}
ScannerCycleOutcome::Superseded => {
info!(
target: "rustfs::scanner",
event = EVENT_SCANNER_CYCLE_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
cycle = cycle_info.current,
state = "superseded",
"Scanner cycle usage snapshot was superseded by concurrent namespace activity"
);
if finalize_partial_scan_cycle(
ctx,
storeapi.clone(),
cycle_info,
cycle_revision,
leader_epoch,
&mut cycle_metrics_guard,
)
.await
{
emit_scan_cycle_superseded(cycle_start.elapsed());
return ScannerCycleOutcome::Superseded;
}
emit_scan_cycle_complete(false, cycle_start.elapsed());
return ScannerCycleOutcome::Failed;
}
ScannerCycleOutcome::Completed | ScannerCycleOutcome::CompletedWithPendingMaintenance => {}
}
if let Err(err) = advance_scanner_cycle(cycle_info) {
error!(
target: "rustfs::scanner",
event = EVENT_SCANNER_PERSIST_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
state = "cycle_counter_exhausted",
error = %err,
"Scanner completed cycle could not advance"
);
mark_scan_cycle_idle(cycle_info, &mut cycle_metrics_guard).await;
emit_scan_cycle_complete(false, cycle_start.elapsed());
return ScannerCycleOutcome::Failed;
}
cycle_info.current = 0;
cycle_info.cycle_completed.push(Utc::now());
global_metrics().clear_current_scan_mode();
retain_recent_cycle_completions(&mut cycle_info.cycle_completed);
if !persist_scanner_cycle_state(ctx, storeapi.clone(), cycle_info, cycle_revision, leader_epoch).await {
cycle_metrics_guard.finish(cycle_info.clone()).await;
emit_scan_cycle_complete(false, cycle_start.elapsed());
return ScannerCycleOutcome::Failed;
}
done_cycle();
emit_scan_cycle_complete(true, cycle_start.elapsed());
if let Some(new_heal_info) = background_heal_info_for_scan_result(background_heal_info.clone(), scan_mode, true) {
save_background_heal_info(storeapi.clone(), new_heal_info).await;
}
info!(
target: "rustfs::scanner",
event = EVENT_SCANNER_CYCLE_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
cycle = cycle_info.current,
scan_mode = ?scan_mode,
state = "completed",
duration = ?now.elapsed(),
cycles_total = cycle_info.cycle_completed.len(),
"Scanner cycle completed"
);
cycle_metrics_guard.finish(cycle_info.clone()).await;
scanner_cycle_outcome_with_pending_maintenance(ScannerCycleOutcome::Completed, pending_maintenance_work)
}
struct ScannerCycleMetricsGuard {
start: Option<ScanCycleWorkSnapshot>,
}
impl ScannerCycleMetricsGuard {
async fn new(cycle: CurrentCycle) -> Self {
Self {
start: Some(global_metrics().start_scan_cycle_work_with_cycle(cycle).await),
}
}
async fn finish(&mut self, cycle: CurrentCycle) {
if let Some(start) = self.start {
global_metrics().finish_scan_cycle_work_with_cycle(start, cycle).await;
self.start = None;
}
}
}
impl Drop for ScannerCycleMetricsGuard {
fn drop(&mut self) {
if let Some(start) = self.start.take() {
global_metrics().finish_scan_cycle_work(start);
}
}
}
pub async fn run_data_scanner(ctx: CancellationToken, storeapi: Arc<ECStore>) -> Result<(), ScannerError> {
let (maintenance_features, maintenance_generation) = configure_scanner_defaults(&ctx, &storeapi).await;
run_data_scanner_with_maintenance_state(ctx, storeapi, maintenance_features, maintenance_generation).await
}
async fn run_data_scanner_with_maintenance_state(
ctx: CancellationToken,
storeapi: Arc<ECStore>,
mut maintenance_features: ScannerMaintenanceFeatures,
mut maintenance_generation_seen: Option<u64>,
) -> Result<(), ScannerError> {
reset_scanner_cycle_schedule();
// Acquire leader lock (write lock) to ensure only one scanner runs
let guard = match storeapi.new_ns_lock(RUSTFS_META_BUCKET, "leader.lock").await {
Ok(ns_lock) => match ns_lock.get_write_lock_quiet(get_lock_acquire_timeout()).await {
Ok(guard) => {
record_scanner_leader_lock_state("acquired");
global_metrics().record_scanner_leader_liveness("acquired", true, "").await;
debug!(
target: "rustfs::scanner",
event = EVENT_SCANNER_LOCK_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
lock_name = "leader.lock",
state = "acquired",
"Scanner leader lock acquired"
);
guard
}
Err(e) => {
record_scanner_leader_lock_state("contended");
global_metrics()
.record_scanner_leader_liveness("contended", false, e.to_string())
.await;
debug!(
target: "rustfs::scanner",
event = EVENT_SCANNER_LOCK_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
lock_name = "leader.lock",
state = "contended",
error = ?e,
"Scanner leader lock contended"
);
return Ok(());
}
},
Err(e) => {
record_scanner_leader_lock_state("create_failed");
global_metrics()
.record_scanner_leader_liveness("create_failed", false, e.to_string())
.await;
error!(
target: "rustfs::scanner",
event = EVENT_SCANNER_LOCK_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
lock_name = "leader.lock",
state = "create_failed",
error = %e,
"Scanner leader lock creation failed"
);
return Ok(());
}
};
let single_disk = storeapi.setup_is_erasure_sd().await;
let erasure = storeapi.setup_is_erasure().await;
let distributed = storeapi.setup_is_dist_erasure().await;
let clean_idle_topology_supported = single_disk || erasure;
let mut dirty_usage_generation_seen = dirty_usage_generation();
let mut runtime_config_generation_seen = scanner_runtime_config_generation();
let mut clean_idle_backoff = ScannerCleanIdleBackoff::default();
let mut superseded_backoff = ScannerRetryBackoff::default();
let mut deferred_backoff = ScannerRetryBackoff::default();
let initial_runtime_config = resolve_scanner_runtime_config();
if clean_idle_topology_supported
&& scanner_clean_idle_backoff_configured(&initial_runtime_config)
&& maintenance_generation_seen.is_none()
{
let Some((features, generation)) = detect_stable_scanner_maintenance_features(&ctx, &storeapi).await else {
global_metrics().set_cycle(None).await;
return Ok(());
};
maintenance_features = features;
maintenance_generation_seen = Some(generation);
}
let mut maintenance_inspection_retry = ScannerMaintenanceInspectionRetry::from_features(maintenance_features, Instant::now());
let mut scanner_activity_seen = None;
let mut scanner_activity_backoff_blocked = false;
if scanner_activity_probe_required(
clean_idle_topology_supported,
scanner_activity_backoff_blocked,
maintenance_features,
&initial_runtime_config,
) {
observe_scanner_activity(&storeapi, distributed, &mut scanner_activity_seen).await;
}
let (buf, mut cycle_revision) = match read_config_with_revision(storeapi.clone(), DATA_USAGE_BLOOM_NAME_PATH.as_str()).await {
Ok((buf, revision)) => (buf.unwrap_or_default(), revision),
Err(err) => {
error!(
target: "rustfs::scanner",
event = EVENT_SCANNER_PERSIST_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
path = %&*DATA_USAGE_BLOOM_NAME_PATH,
state = "revision_load_failed",
error = %err,
"Scanner cycle state revision load failed"
);
global_metrics().set_cycle(None).await;
return Ok(());
}
};
let (mut cycle_info, mut leader_epoch) = match decode_scanner_cycle_state_for_startup(&buf) {
Ok(state) => state,
Err(err) => {
error!(
target: "rustfs::scanner",
event = EVENT_SCANNER_PERSIST_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
path = %&*DATA_USAGE_BLOOM_NAME_PATH,
state = "cycle_decode_failed",
error = %err,
"Scanner stopped because persisted cycle state is invalid"
);
global_metrics().set_cycle(None).await;
return Ok(());
}
};
let usage_floor = match persisted_usage_floor(storeapi.clone()).await {
Ok(floor) => floor,
Err(err) => {
error!(
target: "rustfs::scanner",
event = EVENT_SCANNER_PERSIST_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
path = %DATA_USAGE_OBJ_NAME_PATH.as_str(),
state = "usage_floor_load_failed",
error = %err,
"Scanner stopped because the persisted usage floor could not be loaded"
);
global_metrics().set_cycle(None).await;
return Ok(());
}
};
apply_persisted_usage_floor(&mut cycle_info, &mut leader_epoch, usage_floor);
if ctx.is_cancelled() || guard.is_lock_lost() {
global_metrics().set_cycle(None).await;
return Ok(());
}
let claim_ctx = ctx.child_token();
let leadership_claimed = await_scanner_cycle_with_lock_fence(
&claim_ctx,
claim_scanner_leadership(&claim_ctx, storeapi.clone(), &mut cycle_info, &mut cycle_revision, &mut leader_epoch),
guard.lock_lost_notified(),
)
.await
.unwrap_or(false);
if guard.is_lock_lost() {
record_scanner_leader_lock_lost("Scanner leader lock lost while claiming the leadership epoch").await;
global_metrics().set_cycle(None).await;
return Ok(());
}
if !leadership_claimed {
error!(
target: "rustfs::scanner",
event = EVENT_SCANNER_LOCK_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
lock_name = "leader.lock",
state = "epoch_claim_failed",
"Scanner stopped because the leadership epoch could not be claimed"
);
global_metrics()
.record_scanner_leader_liveness("epoch_claim_failed", false, "leadership epoch claim failed")
.await;
global_metrics().set_cycle(None).await;
return Ok(());
}
if !ctx.is_cancelled() {
// Preserve previous behavior: run one cycle immediately after lock acquisition.
let dirty_generation_before_cycle = dirty_usage_generation();
let dirty_usage_pending_before_cycle = dirty_usage_buckets_pending();
let maintenance_generation_before_cycle = scanner_maintenance_generation();
if guard.is_lock_lost() {
record_scanner_leader_lock_lost("Scanner leader lock lost before the initial cycle").await;
global_metrics().set_cycle(None).await;
return Ok(());
}
let cycle_ctx = ctx.child_token();
let initial_outcome = await_scanner_cycle_with_lock_fence(
&cycle_ctx,
run_data_scanner_cycle(&cycle_ctx, &storeapi, &mut cycle_info, &mut cycle_revision, leader_epoch),
guard.lock_lost_notified(),
)
.await
.unwrap_or(ScannerCycleOutcome::Failed);
superseded_backoff.record_retryable_cycle(initial_outcome == ScannerCycleOutcome::Superseded);
deferred_backoff.record_retryable_cycle(matches!(initial_outcome, ScannerCycleOutcome::Deferred(_)));
dirty_usage_generation_seen = dirty_generation_before_cycle;
if guard.is_lock_lost() {
record_scanner_leader_lock_lost("Scanner leader lock lost during the initial cycle").await;
global_metrics().set_cycle(None).await;
return Ok(());
}
let runtime_config = resolve_scanner_runtime_config();
let scanner_activity_observation = if scanner_activity_probe_required(
clean_idle_topology_supported,
scanner_activity_backoff_blocked,
maintenance_features,
&runtime_config,
) {
observe_scanner_activity(&storeapi, distributed, &mut scanner_activity_seen).await
} else {
scanner_activity_seen = None;
ScannerActivityObservation::NotRequired
};
if scanner_activity_observation == ScannerActivityObservation::MaintenanceChanged {
scanner_activity_backoff_blocked = true;
}
let scanner_activity_ready = !scanner_activity_backoff_blocked && scanner_activity_seen.is_some();
let backoff_enabled = scanner_clean_idle_backoff_enabled(
clean_idle_topology_supported,
scanner_activity_ready,
maintenance_features,
&runtime_config,
);
record_scanner_cycle_result(
&mut clean_idle_backoff,
&runtime_config,
backoff_enabled,
ScannerCycleWakeReason::Timer,
initial_outcome,
scanner_cycle_observed_dirty_work(
dirty_usage_pending_before_cycle,
dirty_generation_before_cycle,
dirty_usage_generation(),
) || maintenance_generation_before_cycle != scanner_maintenance_generation()
|| scanner_activity_observed_work(scanner_activity_observation),
);
runtime_config_generation_seen = scanner_runtime_config_generation();
}
loop {
if ctx.is_cancelled() {
break;
}
let runtime_config = resolve_scanner_runtime_config();
if clean_idle_topology_supported && scanner_clean_idle_backoff_configured(&runtime_config) {
let current_generation = scanner_maintenance_generation();
if maintenance_generation_seen != Some(current_generation) {
scanner_activity_seen = None;
scanner_activity_backoff_blocked = scanner_activity_backoff_blocked_after_wake(
scanner_activity_backoff_blocked,
ScannerCycleWakeReason::MaintenanceConfig,
);
let Some((features, generation)) = detect_stable_scanner_maintenance_features(&ctx, &storeapi).await else {
break;
};
maintenance_features = features;
maintenance_generation_seen = Some(generation);
maintenance_inspection_retry.record_inspection(features, Instant::now());
}
}
if !scanner_activity_probe_required(
clean_idle_topology_supported,
scanner_activity_backoff_blocked,
maintenance_features,
&runtime_config,
) {
scanner_activity_seen = None;
}
let scanner_activity_ready = !scanner_activity_backoff_blocked && scanner_activity_seen.is_some();
let backoff_enabled = scanner_clean_idle_backoff_enabled(
clean_idle_topology_supported,
scanner_activity_ready,
maintenance_features,
&runtime_config,
);
let mut wait_plan =
scanner_cycle_wait_plan(&runtime_config, clean_idle_backoff, backoff_enabled, randomized_cycle_delay_for);
let superseded_retry_interval = superseded_backoff.retry_interval(runtime_config.cycle_interval);
let deferred_retry_interval = deferred_backoff.retry_interval(runtime_config.cycle_interval);
let convergence_retry_interval = superseded_retry_interval.or(deferred_retry_interval);
if let Some(retry_interval) = convergence_retry_interval {
wait_plan.effective_interval = retry_interval;
wait_plan.delay = randomized_cycle_delay_for(retry_interval).min(retry_interval);
}
let dirty_generation_before_wait = dirty_usage_generation();
let dirty_usage_pending_before_wait = dirty_usage_buckets_pending();
let maintenance_generation_before_wait = scanner_maintenance_generation();
record_scanner_cycle_schedule(
wait_plan.effective_interval,
backoff_enabled,
u64::from(clean_idle_backoff.interval_multiplier),
superseded_retry_interval.is_some(),
superseded_backoff.consecutive_cycles,
);
debug!(
target: "rustfs::scanner",
event = EVENT_SCANNER_CYCLE_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
configured_interval = ?runtime_config.cycle_interval,
effective_interval = ?wait_plan.effective_interval,
clean_idle_max_interval = ?wait_plan.clean_idle_max_interval,
scheduled_delay = ?wait_plan.delay,
interval_multiplier = clean_idle_backoff.interval_multiplier,
clean_idle_backoff_enabled = backoff_enabled,
superseded_retry_backoff_enabled = superseded_retry_interval.is_some(),
superseded_cycles = superseded_backoff.consecutive_cycles,
deferred_retry_backoff_enabled = deferred_retry_interval.is_some(),
deferred_cycles = deferred_backoff.consecutive_cycles,
lifecycle_active = maintenance_features.lifecycle,
replication_active = maintenance_features.replication,
feature_inspection_failed = maintenance_features.inspection_failed,
state = "wait_scheduled",
"Scanner cycle wait scheduled"
);
let activity_poll_interval = backoff_enabled.then_some(runtime_config.cycle_interval.max(Duration::from_secs(1)));
let wake_reason = wait_for_next_scanner_cycle_with_activity(
&ctx,
wait_plan.delay,
activity_poll_interval,
&mut scanner_activity_seen,
ScannerCycleObservedGenerations::for_wait(
&runtime_config,
convergence_retry_interval,
dirty_usage_generation_seen,
runtime_config_generation_seen,
maintenance_generation_before_wait,
),
|| guard.is_lock_lost(),
|| probe_scanner_activity(storeapi.as_ref(), distributed),
)
.await;
scanner_activity_backoff_blocked =
scanner_activity_backoff_blocked_after_wake(scanner_activity_backoff_blocked, wake_reason);
match wake_reason {
ScannerCycleWakeReason::Cancelled => break,
ScannerCycleWakeReason::LeaderLockLost => {
record_scanner_leader_lock_lost("Scanner leader lock lost while waiting for the next cycle").await;
break;
}
ScannerCycleWakeReason::RuntimeConfig => {
runtime_config_generation_seen = scanner_runtime_config_generation();
maintenance_generation_seen = None;
scanner_activity_seen = None;
clean_idle_backoff.reset();
continue;
}
ScannerCycleWakeReason::MaintenanceConfig => {
maintenance_generation_seen = None;
scanner_activity_seen = None;
clean_idle_backoff.reset();
continue;
}
ScannerCycleWakeReason::ClusterMaintenance => {
clean_idle_backoff.reset();
}
ScannerCycleWakeReason::Timer
| ScannerCycleWakeReason::DirtyUsage
| ScannerCycleWakeReason::ClusterActivity
| ScannerCycleWakeReason::ClusterActivityUnavailable => {}
}
if wake_reason == ScannerCycleWakeReason::DirtyUsage {
debug!(
target: "rustfs::scanner",
event = EVENT_SCANNER_CYCLE_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
state = "dirty_usage_wakeup",
"Scanner cycle woke for dirty usage work"
);
}
if matches!(
wake_reason,
ScannerCycleWakeReason::ClusterActivity
| ScannerCycleWakeReason::ClusterMaintenance
| ScannerCycleWakeReason::ClusterActivityUnavailable
) {
let cluster_activity_verified = wake_reason == ScannerCycleWakeReason::ClusterActivity;
debug!(
target: "rustfs::scanner",
event = EVENT_SCANNER_CYCLE_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
state = "cluster_activity_wakeup",
cluster_activity_verified,
"Scanner cycle woke for cluster activity"
);
}
if guard.is_lock_lost() {
record_scanner_leader_lock_lost("Scanner leader lock lost before starting the next cycle").await;
break;
}
let dirty_generation_before_cycle = dirty_usage_generation();
let cycle_ctx = ctx.child_token();
let outcome = await_scanner_cycle_with_lock_fence(
&cycle_ctx,
run_data_scanner_cycle(&cycle_ctx, &storeapi, &mut cycle_info, &mut cycle_revision, leader_epoch),
guard.lock_lost_notified(),
)
.await
.unwrap_or(ScannerCycleOutcome::Failed);
superseded_backoff.record_retryable_cycle(outcome == ScannerCycleOutcome::Superseded);
deferred_backoff.record_retryable_cycle(matches!(outcome, ScannerCycleOutcome::Deferred(_)));
dirty_usage_generation_seen = dirty_generation_before_cycle;
if guard.is_lock_lost() {
record_scanner_leader_lock_lost("Scanner leader lock lost during a scanner cycle").await;
break;
}
let current_runtime_generation = scanner_runtime_config_generation();
let runtime_config_changed = current_runtime_generation != runtime_config_generation_seen;
runtime_config_generation_seen = current_runtime_generation;
if runtime_config_changed {
maintenance_generation_seen = None;
clean_idle_backoff.reset();
}
let runtime_config = resolve_scanner_runtime_config();
let current_maintenance_generation = scanner_maintenance_generation();
let maintenance_config_changed =
maintenance_generation_seen.is_some_and(|generation| generation != current_maintenance_generation);
let retry_failed_inspection = maintenance_inspection_retry.retry_due(maintenance_features, wake_reason, Instant::now());
if clean_idle_topology_supported
&& scanner_clean_idle_backoff_configured(&runtime_config)
&& (maintenance_config_changed || retry_failed_inspection)
{
let Some((features, generation)) = detect_stable_scanner_maintenance_features(&ctx, &storeapi).await else {
break;
};
maintenance_features = features;
maintenance_generation_seen = Some(generation);
maintenance_inspection_retry.record_inspection(features, Instant::now());
}
if runtime_config_changed {
clean_idle_backoff.reset();
continue;
}
if maintenance_config_changed {
scanner_activity_seen = None;
scanner_activity_backoff_blocked = scanner_activity_backoff_blocked_after_wake(
scanner_activity_backoff_blocked,
ScannerCycleWakeReason::MaintenanceConfig,
);
clean_idle_backoff.reset();
continue;
}
let scanner_activity_observation = if scanner_activity_probe_required(
clean_idle_topology_supported,
scanner_activity_backoff_blocked,
maintenance_features,
&runtime_config,
) {
observe_scanner_activity(&storeapi, distributed, &mut scanner_activity_seen).await
} else {
scanner_activity_seen = None;
ScannerActivityObservation::NotRequired
};
if scanner_activity_observation == ScannerActivityObservation::MaintenanceChanged {
scanner_activity_backoff_blocked = true;
}
let scanner_activity_ready = !scanner_activity_backoff_blocked && scanner_activity_seen.is_some();
let backoff_enabled = scanner_clean_idle_backoff_enabled(
clean_idle_topology_supported,
scanner_activity_ready,
maintenance_features,
&runtime_config,
);
record_scanner_cycle_result(
&mut clean_idle_backoff,
&runtime_config,
backoff_enabled,
wake_reason,
outcome,
scanner_cycle_observed_dirty_work(
dirty_usage_pending_before_wait,
dirty_generation_before_wait,
dirty_usage_generation(),
) || scanner_activity_observed_work(scanner_activity_observation),
);
}
global_metrics().set_cycle(None).await;
reset_scanner_cycle_schedule();
if !guard.is_lock_lost() {
global_metrics().record_scanner_leader_liveness("stopped", false, "").await;
}
debug!(
target: "rustfs::scanner",
event = EVENT_SCANNER_CYCLE_STATE,
component = LOG_COMPONENT_SCANNER,
subsystem = LOG_SUBSYSTEM_RUNTIME,
state = "stopped",
"Scanner runtime stopped"
);
Ok(())
}
struct ScannerScanModeGuard;
impl ScannerScanModeGuard {
fn new(scan_mode: HealScanMode) -> Self {
global_metrics().set_current_scan_mode(scan_mode);
Self
}
}
impl Drop for ScannerScanModeGuard {
fn drop(&mut self) {
global_metrics().clear_current_scan_mode();
}
}
fn scanner_cycle_completion_outcome(
scan_status: ScannerCycleStatus,
usage_persist_outcome: DataUsagePersistOutcome,
has_dirty_usage: bool,
has_failed_dirty_usage: bool,
) -> ScannerCycleOutcome {
match (scan_status, usage_persist_outcome) {
(_, DataUsagePersistOutcome::Failed) => ScannerCycleOutcome::Failed,
(ScannerCycleStatus::Deferred(reason), DataUsagePersistOutcome::NoUpdate)
if !has_dirty_usage && !has_failed_dirty_usage =>
{
ScannerCycleOutcome::Deferred(reason)
}
(ScannerCycleStatus::Deferred(_), _) => ScannerCycleOutcome::Failed,
(ScannerCycleStatus::Superseded, _) if !has_failed_dirty_usage => ScannerCycleOutcome::Superseded,
(ScannerCycleStatus::Superseded, _) => ScannerCycleOutcome::Failed,
(
ScannerCycleStatus::Incomplete,
DataUsagePersistOutcome::Saved | DataUsagePersistOutcome::AlreadyDurable | DataUsagePersistOutcome::PriorCycleDurable,
) if !has_failed_dirty_usage => ScannerCycleOutcome::Partial,
(ScannerCycleStatus::Incomplete, _) => ScannerCycleOutcome::Failed,
(
ScannerCycleStatus::Complete,
DataUsagePersistOutcome::Saved | DataUsagePersistOutcome::AlreadyDurable | DataUsagePersistOutcome::PriorCycleDurable,
) => ScannerCycleOutcome::Completed,
(ScannerCycleStatus::Complete, DataUsagePersistOutcome::Current) if !has_dirty_usage => ScannerCycleOutcome::Completed,
(ScannerCycleStatus::Complete, _) => ScannerCycleOutcome::Failed,
}
}
fn finalize_scanner_cycle_result(
scan_cycle_result: crate::scanner_io::ScannerCycleResult,
usage_persist_outcome: DataUsagePersistOutcome,
) -> (ScannerCycleOutcome, bool, Vec<ScannerDirtyUsageAcknowledgement>) {
let completion_outcome = scanner_cycle_completion_outcome(
scan_cycle_result.status,
usage_persist_outcome,
scan_cycle_result.has_dirty_usage_to_acknowledge(),
scan_cycle_result.has_failed_dirty_usage(),
);
let pending_maintenance_work = scan_cycle_result.has_pending_maintenance_work();
let durable_complete_snapshot = scan_cycle_result.status == ScannerCycleStatus::Complete
&& matches!(
usage_persist_outcome,
DataUsagePersistOutcome::Saved | DataUsagePersistOutcome::AlreadyDurable
);
let remote_dirty_usage_acknowledgements = if durable_complete_snapshot {
scan_cycle_result.acknowledge_durable_usage()
} else {
Vec::new()
};
(completion_outcome, pending_maintenance_work, remote_dirty_usage_acknowledgements)
}
/// Decide whether an incoming usage snapshot must be skipped as stale, given the local
/// wall clock `now`. Mirrors `stale_data_usage_persist_reason` in
/// `crates/ecstore/src/data_usage/mod.rs` — keep the two consistent.
///
/// If the persisted `existing.last_update` is future-dated beyond
/// [`rustfs_data_usage::USAGE_LAST_UPDATE_FUTURE_TOLERANCE`] (clock step-back or a
/// slower-clock scanner leader), it is untrustworthy: the save is allowed so usage
/// stats cannot freeze forever.
fn stale_data_usage_update_reason(
incoming: &DataUsageInfo,
existing: &DataUsageInfo,
now: std::time::SystemTime,
) -> Option<&'static str> {
match (incoming.scanner_epoch, existing.scanner_epoch) {
(Some(incoming_epoch), Some(existing_epoch)) if incoming_epoch < existing_epoch => {
return Some("older_scanner_epoch");
}
(Some(incoming_epoch), Some(existing_epoch)) if incoming_epoch > existing_epoch => return None,
(Some(_), None) => return None,
(None, Some(_)) => return Some("missing_incoming_scanner_epoch"),
(Some(_), Some(_)) | (None, None) => {}
}
match (incoming.scanner_cycle, existing.scanner_cycle) {
(Some(incoming_cycle), Some(existing_cycle)) if incoming_cycle < existing_cycle => {
return Some("older_scanner_cycle");
}
(Some(incoming_cycle), Some(existing_cycle)) if incoming_cycle == existing_cycle => {
return Some("conflicting_same_scanner_cycle");
}
(Some(_), Some(_)) | (Some(_), None) => return None,
(None, Some(_)) => return Some("missing_incoming_scanner_cycle"),
(None, None) => {}
}
match (incoming.last_update, existing.last_update) {
(Some(new_ts), Some(existing_ts))
if new_ts <= existing_ts && !rustfs_data_usage::usage_last_update_is_untrusted_future(existing_ts, now) =>
{
Some("older_or_equal_last_update")
}
(None, Some(_)) => Some("missing_incoming_last_update"),
_ => None,
}
}
fn data_usage_reintroduces_missing_bucket(incoming: &DataUsageInfo, existing: Option<&DataUsageInfo>) -> bool {
let Some(existing) = existing else {
return !incoming.buckets_usage.is_empty() || !incoming.bucket_sizes.is_empty();
};
incoming
.buckets_usage
.keys()
.chain(incoming.bucket_sizes.keys())
.any(|bucket| !existing.buckets_usage.contains_key(bucket) && !existing.bucket_sizes.contains_key(bucket))
}
/// Store data usage info in backend. Will store all objects sent on the receiver until closed.
mod activity;
mod cycle_state;
mod heal_info;
mod leadership;
mod usage_store;
use activity::*;
use cycle_state::*;
use leadership::*;
use usage_store::*;
pub use activity::scanner_topology_digest;
pub(crate) use activity::{
ScannerActivitySnapshot, ScannerDirtyUsageAcknowledgement, probe_scanner_activity, scanner_activity_allows_usage_publication,
scanner_activity_snapshot_digest, scanner_dirty_usage_acknowledgements,
};
pub(crate) use activity::{ScannerCycleOutcome, scanner_cycle_outcome_with_pending_maintenance};
#[cfg(test)]
pub(crate) use cycle_state::encode_scanner_cycle_fence_for_test;
pub(crate) use cycle_state::{current_scanner_leader_epoch, decode_persisted_scanner_cycle_fence};
pub use heal_info::{BackgroundHealInfo, read_background_heal_info, save_background_heal_info};
pub use usage_store::store_data_usage_in_backend;
#[cfg(test)]
mod tests;
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