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[improvement](be) Support dynamic file cache capacity #65477

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[improvement](be) Support dynamic file cache capacity #65477

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516 changes: 394 additions & 122 deletions be/src/io/cache/block_file_cache.cpp
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33 changes: 32 additions & 1 deletion be/src/io/cache/block_file_cache.h
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Original file line number Diff line number Diff line change
Expand Up @@ -212,7 +212,7 @@ class BlockFileCache {
Status initialize();

/// Cache capacity in bytes.
[[nodiscard]] size_t capacity() const { return _capacity; }
[[nodiscard]] size_t capacity() const;

// try to release all releasable block
// it maybe hang the io/system
Expand Down Expand Up @@ -264,6 +264,16 @@ class BlockFileCache {
* @returns summary message
*/
std::string reset_capacity(size_t new_capacity);
std::string reset_capacity(size_t new_capacity, bool auto_capacity);

Status prepare_reset_capacity(const BlockFileCacheResetRequest& request,
const std::optional<FileCacheDiskState>& observed_disk,
FileCacheResizePlan* plan) const;
Status apply_reset_capacity(const FileCacheResizePlan& plan, FileCachePathResizeResult* result);
Status reset_capacity(const BlockFileCacheResetRequest& request,
FileCachePathResizeResult* result);

Status get_runtime_info(FileCacheRuntimeInfo* info) const;

std::map<size_t, FileBlockSPtr> get_blocks_by_key(const UInt128Wrapper& hash);

Expand Down Expand Up @@ -467,8 +477,12 @@ class BlockFileCache {
size_t get_used_cache_size_unlocked(FileCacheType type,
std::lock_guard<std::mutex>& cache_lock) const;

void check_disk_resource_limit(const FileCacheDiskState& disk_state);
void check_need_evict_cache_in_advance(const FileCacheDiskState& disk_state);
void check_disk_resource_limit();
void check_need_evict_cache_in_advance();
void maybe_reset_capacity_from_disk(const FileCacheDiskState& disk_state,
uint64_t expected_generation);

size_t get_available_cache_size_unlocked(FileCacheType type,
std::lock_guard<std::mutex>& cache_lock) const;
Expand All @@ -479,6 +493,7 @@ class BlockFileCache {
bool need_to_move(FileCacheType cell_type, FileCacheType query_type) const;

void run_background_monitor();
void run_background_monitor_once();
void run_background_gc();
void run_background_lru_log_replay();
size_t replay_lru_logs_once();
Expand Down Expand Up @@ -522,10 +537,20 @@ class BlockFileCache {

void clear_need_update_lru_blocks();

Status apply_reset_capacity_unlocked(const FileCacheResizePlan& plan,
FileCachePathResizeResult* result,
std::lock_guard<std::mutex>& cache_lock);
void update_resize_pending_unlocked(std::lock_guard<std::mutex>& cache_lock);
void update_disk_state_unlocked(const FileCacheDiskState& disk_state,
std::lock_guard<std::mutex>& cache_lock);
void record_resize_failure(FileCacheResizeSource source, const Status& status);
void evict_over_capacity(size_t batch_size, std::lock_guard<std::mutex>& cache_lock);

// info
std::string _cache_base_path;
size_t _capacity = 0;
size_t _max_file_block_size = 0;
FileCacheCapacityState _capacity_state;

mutable std::mutex _mutex;
bool _close {false};
Expand Down Expand Up @@ -572,6 +597,12 @@ class BlockFileCache {

// metrics
std::shared_ptr<bvar::Status<size_t>> _cache_capacity_metrics;
std::shared_ptr<bvar::Status<size_t>> _resize_pending_bytes_metrics;
std::shared_ptr<bvar::Status<size_t>> _disk_total_capacity_metrics;
std::shared_ptr<bvar::Status<size_t>> _disk_available_capacity_metrics;
std::shared_ptr<bvar::Status<int>> _capacity_mode_metrics;
std::shared_ptr<bvar::Adder<size_t>> _auto_resize_success_metrics;
std::shared_ptr<bvar::Adder<size_t>> _auto_resize_failure_metrics;
std::shared_ptr<bvar::Status<size_t>> _cur_cache_size_metrics;
std::shared_ptr<bvar::Status<size_t>> _cur_ttl_cache_size_metrics;
std::shared_ptr<bvar::Status<size_t>> _cur_ttl_cache_lru_queue_cache_size_metrics;
Expand Down
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