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feat(scanner): add versioned scan checkpoints (#3220)

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Co-authored-by: Henry Guo <marshawcoco@users.noreply.github.com>
This commit is contained in:
Henry Guo
2026-06-05 21:49:41 +08:00
committed by GitHub
parent f1b8f8312d
commit 0d445afda9
2 changed files with 100 additions and 4 deletions
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crates/scanner/src/scanner_folder.rs
+68 -4
View File
@@ -19,12 +19,15 @@ use std::sync::{Arc, Once};
use std::time::{Duration, Instant, SystemTime};
use crate::ReplTargetSizeSummary;
use crate::data_usage_define::{DataUsageCache, DataUsageEntry, DataUsageHash, DataUsageHashMap, SizeSummary, hash_path};
use crate::data_usage_define::{
DataUsageCache, DataUsageEntry, DataUsageHash, DataUsageHashMap, DataUsageScanCheckpoint, DataUsageScanCheckpointReason,
SizeSummary, hash_path,
};
use crate::error::ScannerError;
use crate::runtime_config::{
scanner_alert_excess_folders, scanner_alert_excess_version_size, scanner_alert_excess_versions, scanner_yield_every_n_objects,
};
use crate::scanner_budget::ScannerCycleBudget;
use crate::scanner_budget::{ScannerCycleBudget, ScannerCycleBudgetReason};
use crate::scanner_io::ScannerIODisk as _;
use crate::sleeper::DynamicSleeper;
use metrics::{counter, describe_counter};
@@ -206,6 +209,31 @@ fn order_queued_folders_for_resume(folders: &mut [QueuedFolder], resume_after: O
order_items_for_resume(folders, resume_after, |folder| folder.folder.name.as_str());
}
fn checkpoint_reason_from_budget(reason: Option<ScannerCycleBudgetReason>) -> DataUsageScanCheckpointReason {
match reason {
Some(ScannerCycleBudgetReason::Runtime) => DataUsageScanCheckpointReason::Runtime,
Some(ScannerCycleBudgetReason::Objects) => DataUsageScanCheckpointReason::Objects,
Some(ScannerCycleBudgetReason::Directories) => DataUsageScanCheckpointReason::Directories,
None => DataUsageScanCheckpointReason::Unknown,
}
}
fn set_scan_checkpoint(cache: &mut DataUsageCache, reason: DataUsageScanCheckpointReason) {
let resume_after = cache.info.scan_resume_after.clone().or_else(|| {
cache
.info
.scan_checkpoint
.as_ref()
.map(|checkpoint| checkpoint.resume_after.clone())
});
if let Some(resume_after) = resume_after {
cache.info.scan_checkpoint = Some(DataUsageScanCheckpoint::new(resume_after, reason));
} else {
cache.info.scan_checkpoint = None;
}
}
fn should_alert_excessive_versions(remaining_versions: usize, cumulative_size: i64) -> (bool, bool) {
let too_many_versions = remaining_versions as u64 >= scanner_excess_versions_threshold();
let too_large_versions = cumulative_size > 0 && cumulative_size as u64 >= scanner_excess_version_size_threshold();
@@ -848,6 +876,9 @@ impl FolderScanner {
fn record_scan_resume_hint(&mut self, folder: &str) {
self.new_cache.info.scan_resume_after = Some(folder.to_string());
self.update_cache.info.scan_resume_after = Some(folder.to_string());
let checkpoint = DataUsageScanCheckpoint::new(folder.to_string(), DataUsageScanCheckpointReason::Unknown);
self.new_cache.info.scan_checkpoint = Some(checkpoint.clone());
self.update_cache.info.scan_checkpoint = Some(checkpoint);
}
fn alert_excessive_folders(&self, folder: &str, total_folders: usize) {
@@ -1224,7 +1255,13 @@ impl FolderScanner {
}
}
let scan_resume_after = self.old_cache.info.scan_resume_after.as_deref();
let scan_resume_after = self
.old_cache
.info
.scan_checkpoint
.as_ref()
.map(|checkpoint| checkpoint.resume_after.as_str())
.or(self.old_cache.info.scan_resume_after.as_deref());
let mut queued_folders = Vec::with_capacity(new_folders.len() + existing_folders.len());
queued_folders.extend(new_folders.into_iter().map(|folder| QueuedFolder {
folder,
@@ -1704,7 +1741,7 @@ pub async fn scan_data_folder(
updates,
last_update: SystemTime::UNIX_EPOCH,
update_current_path,
budget,
budget: budget.clone(),
skip_heal,
local_disk,
};
@@ -1731,6 +1768,7 @@ pub async fn scan_data_folder(
new_cache.info.last_update = Some(SystemTime::now());
new_cache.info.next_cycle = cache.info.next_cycle;
new_cache.info.scan_resume_after = None;
new_cache.info.scan_checkpoint = None;
close_disk().await;
Ok(new_cache.clone())
@@ -1752,6 +1790,7 @@ pub async fn scan_data_folder(
new_cache.force_compact(DATA_SCANNER_COMPACT_AT_CHILDREN);
new_cache.info.last_update = Some(SystemTime::now());
new_cache.info.next_cycle = cache.info.next_cycle;
set_scan_checkpoint(new_cache, checkpoint_reason_from_budget(budget.reason()));
close_disk().await;
return Err(ScannerError::PartialCache(Box::new(new_cache.clone())));
}
@@ -1958,6 +1997,26 @@ mod tests {
assert!(!should_yield_after_object(128, 0));
}
#[test]
fn test_checkpoint_reason_from_budget_maps_all_budget_reasons() {
assert_eq!(
checkpoint_reason_from_budget(Some(crate::scanner_budget::ScannerCycleBudgetReason::Runtime)),
crate::data_usage_define::DataUsageScanCheckpointReason::Runtime
);
assert_eq!(
checkpoint_reason_from_budget(Some(crate::scanner_budget::ScannerCycleBudgetReason::Objects)),
crate::data_usage_define::DataUsageScanCheckpointReason::Objects
);
assert_eq!(
checkpoint_reason_from_budget(Some(crate::scanner_budget::ScannerCycleBudgetReason::Directories)),
crate::data_usage_define::DataUsageScanCheckpointReason::Directories
);
assert_eq!(
checkpoint_reason_from_budget(None),
crate::data_usage_define::DataUsageScanCheckpointReason::Unknown
);
}
#[test]
fn test_order_folders_for_resume_rotates_after_exact_resume_hint() {
let mut folders = vec![
@@ -2468,6 +2527,10 @@ mod tests {
};
assert_eq!(partial_cache.info.scan_resume_after.as_deref(), Some("bucket/child-b"));
let checkpoint = partial_cache.info.scan_checkpoint.as_ref().expect("partial scan checkpoint");
assert_eq!(checkpoint.version, crate::data_usage_define::DATA_USAGE_SCAN_CHECKPOINT_VERSION);
assert_eq!(checkpoint.resume_after, "bucket/child-b");
assert_eq!(checkpoint.reason, crate::data_usage_define::DataUsageScanCheckpointReason::Directories);
assert!(
partial_cache
.root()
@@ -2585,6 +2648,7 @@ mod tests {
.expect("scan should complete successfully");
assert!(result.info.scan_resume_after.is_none());
assert!(result.info.scan_checkpoint.is_none());
assert_eq!(result.info.next_cycle, 11);
}