2022-01-13 11:57:56 +00:00
|
|
|
#include "FileCache.h"
|
|
|
|
|
|
|
|
#include <Common/randomSeed.h>
|
|
|
|
#include <Common/SipHash.h>
|
|
|
|
#include <Common/hex.h>
|
|
|
|
#include <IO/ReadHelpers.h>
|
2022-01-21 15:39:34 +00:00
|
|
|
#include <IO/WriteBufferFromFile.h>
|
|
|
|
#include <IO/ReadSettings.h>
|
|
|
|
#include <IO/WriteBufferFromString.h>
|
|
|
|
#include <IO/Operators.h>
|
2022-01-13 11:57:56 +00:00
|
|
|
#include <pcg-random/pcg_random.hpp>
|
|
|
|
#include <filesystem>
|
|
|
|
|
|
|
|
namespace fs = std::filesystem;
|
|
|
|
|
|
|
|
namespace DB
|
|
|
|
{
|
2022-01-21 15:39:34 +00:00
|
|
|
namespace ErrorCodes
|
|
|
|
{
|
2022-02-18 15:38:23 +00:00
|
|
|
extern const int REMOTE_FS_OBJECT_CACHE_ERROR;
|
2022-01-23 17:33:22 +00:00
|
|
|
extern const int LOGICAL_ERROR;
|
2022-01-21 15:39:34 +00:00
|
|
|
}
|
2022-01-13 11:57:56 +00:00
|
|
|
|
|
|
|
namespace
|
|
|
|
{
|
2022-02-18 15:38:23 +00:00
|
|
|
String keyToStr(const IFileCache::Key & key)
|
2022-01-13 11:57:56 +00:00
|
|
|
{
|
|
|
|
return getHexUIntLowercase(key);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2022-02-18 15:38:23 +00:00
|
|
|
IFileCache::IFileCache(
|
2022-01-26 18:43:23 +00:00
|
|
|
const String & cache_base_path_,
|
|
|
|
size_t max_size_,
|
2022-02-18 09:06:13 +00:00
|
|
|
size_t max_element_size_,
|
|
|
|
size_t max_file_segment_size_)
|
2022-01-26 18:43:23 +00:00
|
|
|
: cache_base_path(cache_base_path_)
|
|
|
|
, max_size(max_size_)
|
|
|
|
, max_element_size(max_element_size_)
|
2022-02-18 09:06:13 +00:00
|
|
|
, max_file_segment_size(max_file_segment_size_)
|
2022-01-13 11:57:56 +00:00
|
|
|
{
|
|
|
|
}
|
|
|
|
|
2022-02-18 15:38:23 +00:00
|
|
|
IFileCache::Key IFileCache::hash(const String & path)
|
2022-01-13 11:57:56 +00:00
|
|
|
{
|
|
|
|
return sipHash128(path.data(), path.size());
|
|
|
|
}
|
|
|
|
|
2022-02-18 15:38:23 +00:00
|
|
|
String IFileCache::getPathInLocalCache(const Key & key, size_t offset)
|
2022-01-13 11:57:56 +00:00
|
|
|
{
|
|
|
|
auto key_str = keyToStr(key);
|
|
|
|
return fs::path(cache_base_path) / key_str.substr(0, 3) / key_str / std::to_string(offset);
|
|
|
|
}
|
|
|
|
|
2022-02-18 15:38:23 +00:00
|
|
|
String IFileCache::getPathInLocalCache(const Key & key)
|
2022-01-13 11:57:56 +00:00
|
|
|
{
|
|
|
|
auto key_str = keyToStr(key);
|
|
|
|
return fs::path(cache_base_path) / key_str.substr(0, 3) / key_str;
|
|
|
|
}
|
|
|
|
|
2022-02-18 15:38:23 +00:00
|
|
|
bool IFileCache::shouldBypassCache()
|
2022-01-24 22:07:02 +00:00
|
|
|
{
|
|
|
|
return !CurrentThread::isInitialized()
|
|
|
|
|| !CurrentThread::get().getQueryContext()
|
2022-02-15 09:11:33 +00:00
|
|
|
|| CurrentThread::getQueryId().size == 0;
|
2022-01-24 22:07:02 +00:00
|
|
|
}
|
|
|
|
|
2022-02-18 09:06:13 +00:00
|
|
|
LRUFileCache::LRUFileCache(const String & cache_base_path_, size_t max_size_, size_t max_element_size_, size_t max_file_segment_size_)
|
|
|
|
: IFileCache(cache_base_path_, max_size_, max_element_size_, max_file_segment_size_)
|
|
|
|
, log(&Poco::Logger::get("LRUFileCache"))
|
2022-01-13 11:57:56 +00:00
|
|
|
{
|
|
|
|
if (fs::exists(cache_base_path))
|
2022-02-18 15:38:23 +00:00
|
|
|
loadCacheInfoIntoMemory();
|
2022-01-13 11:57:56 +00:00
|
|
|
else
|
|
|
|
fs::create_directories(cache_base_path);
|
2022-01-21 15:39:34 +00:00
|
|
|
|
|
|
|
startup_restore_finished = true;
|
2022-01-13 11:57:56 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void LRUFileCache::useCell(
|
2022-01-24 22:07:02 +00:00
|
|
|
const FileSegmentCell & cell, FileSegments & result, std::lock_guard<std::mutex> & /* cache_lock */)
|
2022-01-13 11:57:56 +00:00
|
|
|
{
|
2022-01-30 11:35:28 +00:00
|
|
|
auto file_segment = cell.file_segment;
|
|
|
|
if (file_segment->download_state == FileSegment::State::DOWNLOADED
|
2022-02-18 15:38:23 +00:00
|
|
|
&& fs::file_size(getPathInLocalCache(file_segment->key(), file_segment->offset())) == 0)
|
2022-01-30 11:35:28 +00:00
|
|
|
throw Exception(ErrorCodes::LOGICAL_ERROR,
|
|
|
|
"Cannot have zero size downloaded file segments. Current file segment: {}",
|
|
|
|
file_segment->range().toString());
|
|
|
|
|
2022-01-13 11:57:56 +00:00
|
|
|
result.push_back(cell.file_segment);
|
2022-01-21 15:39:34 +00:00
|
|
|
|
|
|
|
/**
|
|
|
|
* A cell receives a queue iterator on first successful space reservation attempt
|
|
|
|
* (space is reserved incrementally on each read buffer nextImpl() call).
|
|
|
|
*/
|
|
|
|
if (cell.queue_iterator)
|
|
|
|
{
|
|
|
|
/// Move to the end of the queue. The iterator remains valid.
|
|
|
|
queue.splice(queue.end(), queue, *cell.queue_iterator);
|
|
|
|
}
|
2022-01-13 11:57:56 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
LRUFileCache::FileSegmentCell * LRUFileCache::getCell(
|
2022-01-24 22:07:02 +00:00
|
|
|
const Key & key, size_t offset, std::lock_guard<std::mutex> & /* cache_lock */)
|
2022-01-13 11:57:56 +00:00
|
|
|
{
|
|
|
|
auto it = files.find(key);
|
|
|
|
if (it == files.end())
|
|
|
|
return nullptr;
|
|
|
|
|
|
|
|
auto & offsets = it->second;
|
|
|
|
auto cell_it = offsets.find(offset);
|
|
|
|
if (cell_it == offsets.end())
|
|
|
|
return nullptr;
|
|
|
|
|
|
|
|
return &cell_it->second;
|
|
|
|
}
|
|
|
|
|
|
|
|
FileSegments LRUFileCache::getImpl(
|
2022-01-24 22:07:02 +00:00
|
|
|
const Key & key, const FileSegment::Range & range, std::lock_guard<std::mutex> & cache_lock)
|
2022-01-13 11:57:56 +00:00
|
|
|
{
|
|
|
|
/// Given range = [left, right] and non-overlapping ordered set of file segments,
|
|
|
|
/// find list [segment1, ..., segmentN] of segments which intersect with given range.
|
|
|
|
|
|
|
|
auto it = files.find(key);
|
|
|
|
if (it == files.end())
|
|
|
|
return {};
|
|
|
|
|
|
|
|
const auto & file_segments = it->second;
|
|
|
|
if (file_segments.empty())
|
|
|
|
{
|
2022-02-18 15:38:23 +00:00
|
|
|
auto key_path = getPathInLocalCache(key);
|
|
|
|
|
|
|
|
files.erase(key);
|
|
|
|
|
|
|
|
if (fs::exists(key_path))
|
|
|
|
fs::remove(key_path);
|
|
|
|
|
2022-01-13 11:57:56 +00:00
|
|
|
return {};
|
|
|
|
}
|
|
|
|
|
|
|
|
FileSegments result;
|
|
|
|
auto segment_it = file_segments.lower_bound(range.left);
|
|
|
|
if (segment_it == file_segments.end())
|
|
|
|
{
|
|
|
|
/// N - last cached segment for given file key, segment{N}.offset < range.left:
|
|
|
|
/// segment{N} segment{N}
|
|
|
|
/// [________ [_______]
|
|
|
|
/// [__________] OR [________]
|
|
|
|
/// ^ ^
|
|
|
|
/// range.left range.left
|
|
|
|
|
2022-02-18 15:38:23 +00:00
|
|
|
const auto & cell = file_segments.rbegin()->second;
|
2022-01-13 11:57:56 +00:00
|
|
|
if (cell.file_segment->range().right < range.left)
|
|
|
|
return {};
|
|
|
|
|
|
|
|
useCell(cell, result, cache_lock);
|
|
|
|
}
|
|
|
|
else /// segment_it <-- segmment{k}
|
|
|
|
{
|
|
|
|
if (segment_it != file_segments.begin())
|
|
|
|
{
|
|
|
|
const auto & prev_cell = std::prev(segment_it)->second;
|
|
|
|
const auto & prev_cell_range = prev_cell.file_segment->range();
|
|
|
|
|
|
|
|
if (range.left <= prev_cell_range.right)
|
|
|
|
{
|
|
|
|
/// segment{k-1} segment{k}
|
|
|
|
/// [________] [_____
|
|
|
|
/// [___________
|
|
|
|
/// ^
|
|
|
|
/// range.left
|
|
|
|
|
|
|
|
useCell(prev_cell, result, cache_lock);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/// segment{k} ... segment{k-1} segment{k} segment{k}
|
|
|
|
/// [______ [______] [____ [________
|
|
|
|
/// [_________ OR [________ OR [______] ^
|
|
|
|
/// ^ ^ ^ segment{k}.offset
|
|
|
|
/// range.left range.left range.right
|
|
|
|
|
|
|
|
while (segment_it != file_segments.end())
|
|
|
|
{
|
|
|
|
const auto & cell = segment_it->second;
|
|
|
|
if (range.right < cell.file_segment->range().left)
|
|
|
|
break;
|
2022-01-21 15:39:34 +00:00
|
|
|
|
2022-01-13 11:57:56 +00:00
|
|
|
useCell(cell, result, cache_lock);
|
|
|
|
++segment_it;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
2022-02-18 09:06:13 +00:00
|
|
|
FileSegments LRUFileCache::splitRangeIntoEmptyCells(
|
|
|
|
const Key & key, size_t offset, size_t size, std::lock_guard<std::mutex> & cache_lock)
|
|
|
|
{
|
|
|
|
assert(size > 0);
|
|
|
|
|
|
|
|
auto current_pos = offset;
|
|
|
|
auto end_pos_non_included = offset + size;
|
|
|
|
|
|
|
|
size_t current_cell_size;
|
|
|
|
size_t remaining_size = size;
|
|
|
|
|
|
|
|
FileSegments file_segments;
|
|
|
|
while (current_pos < end_pos_non_included)
|
|
|
|
{
|
|
|
|
current_cell_size = std::min(remaining_size, max_file_segment_size);
|
|
|
|
remaining_size -= current_cell_size;
|
|
|
|
|
|
|
|
auto * cell = addCell(key, current_pos, current_cell_size, FileSegment::State::EMPTY, cache_lock);
|
|
|
|
if (cell)
|
|
|
|
file_segments.push_back(cell->file_segment);
|
|
|
|
|
|
|
|
current_pos += current_cell_size;
|
|
|
|
}
|
|
|
|
|
|
|
|
assert(file_segments.empty() || offset + size - 1 == file_segments.back()->range().right);
|
|
|
|
return file_segments;
|
|
|
|
}
|
|
|
|
|
2022-01-13 11:57:56 +00:00
|
|
|
FileSegmentsHolder LRUFileCache::getOrSet(const Key & key, size_t offset, size_t size)
|
|
|
|
{
|
|
|
|
FileSegment::Range range(offset, offset + size - 1);
|
|
|
|
|
|
|
|
std::lock_guard cache_lock(mutex);
|
|
|
|
|
|
|
|
/// Get all segments which intersect with the given range.
|
|
|
|
auto file_segments = getImpl(key, range, cache_lock);
|
|
|
|
|
|
|
|
if (file_segments.empty())
|
|
|
|
{
|
2022-02-18 09:06:13 +00:00
|
|
|
file_segments = splitRangeIntoEmptyCells(key, offset, size, cache_lock);
|
2022-01-13 11:57:56 +00:00
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
/// There are segments [segment1, ..., segmentN]
|
|
|
|
/// (non-overlapping, non-empty, ascending-ordered) which (maybe partially)
|
|
|
|
/// intersect with given range.
|
|
|
|
|
|
|
|
/// It can have holes:
|
|
|
|
/// [____________________] -- requested range
|
|
|
|
/// [____] [_] [_________] -- intersecting cache [segment1, ..., segmentN]
|
2022-01-21 15:39:34 +00:00
|
|
|
///
|
|
|
|
/// For each such hole create a cell with file segment state EMPTY.
|
2022-01-13 11:57:56 +00:00
|
|
|
|
|
|
|
auto it = file_segments.begin();
|
|
|
|
auto segment_range = (*it)->range();
|
|
|
|
|
|
|
|
size_t current_pos;
|
|
|
|
if (segment_range.left < range.left)
|
|
|
|
{
|
|
|
|
/// [_______ -- requested range
|
|
|
|
/// [_______
|
|
|
|
/// ^
|
|
|
|
/// segment1
|
|
|
|
|
|
|
|
current_pos = segment_range.right + 1;
|
|
|
|
++it;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
current_pos = range.left;
|
|
|
|
|
|
|
|
while (current_pos <= range.right && it != file_segments.end())
|
|
|
|
{
|
|
|
|
segment_range = (*it)->range();
|
|
|
|
|
|
|
|
if (current_pos == segment_range.left)
|
|
|
|
{
|
|
|
|
current_pos = segment_range.right + 1;
|
|
|
|
++it;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
assert(current_pos < segment_range.left);
|
|
|
|
|
|
|
|
auto hole_size = segment_range.left - current_pos;
|
2022-02-18 09:06:13 +00:00
|
|
|
file_segments.splice(it, splitRangeIntoEmptyCells(key, current_pos, hole_size, cache_lock));
|
2022-01-13 11:57:56 +00:00
|
|
|
|
|
|
|
current_pos = segment_range.right + 1;
|
|
|
|
++it;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (current_pos <= range.right)
|
|
|
|
{
|
|
|
|
/// ________] -- requested range
|
|
|
|
/// _____]
|
|
|
|
/// ^
|
|
|
|
/// segmentN
|
|
|
|
|
|
|
|
auto hole_size = range.right - current_pos + 1;
|
2022-02-18 09:06:13 +00:00
|
|
|
file_segments.splice(file_segments.end(), splitRangeIntoEmptyCells(key, current_pos, hole_size, cache_lock));
|
2022-01-13 11:57:56 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2022-01-24 22:07:02 +00:00
|
|
|
/// TODO: remove this extra debug logging.
|
|
|
|
String ranges;
|
|
|
|
for (const auto & s : file_segments)
|
2022-01-26 18:43:23 +00:00
|
|
|
ranges += "\nRange: " + s->range().toString() + ", download state: " + FileSegment::stateToString(s->download_state) + " ";
|
2022-01-24 22:07:02 +00:00
|
|
|
LOG_TEST(log, "Cache getOrSet. Key: {}, range: {}, file_segments number: {}, ranges: {}",
|
|
|
|
keyToStr(key), range.toString(), file_segments.size(), ranges);
|
|
|
|
|
2022-01-22 10:41:11 +00:00
|
|
|
assert(!file_segments.empty());
|
2022-01-13 11:57:56 +00:00
|
|
|
return FileSegmentsHolder(std::move(file_segments));
|
|
|
|
}
|
|
|
|
|
2022-01-21 15:39:34 +00:00
|
|
|
LRUFileCache::FileSegmentCell * LRUFileCache::addCell(
|
2022-01-26 18:43:23 +00:00
|
|
|
const Key & key, size_t offset, size_t size, FileSegment::State state,
|
|
|
|
std::lock_guard<std::mutex> & /* cache_lock */)
|
2022-01-13 11:57:56 +00:00
|
|
|
{
|
2022-01-22 22:56:24 +00:00
|
|
|
/// Create a file segment cell and put it in `files` map by [key][offset].
|
|
|
|
|
2022-01-13 11:57:56 +00:00
|
|
|
if (!size)
|
|
|
|
return nullptr; /// Empty files are not cached.
|
|
|
|
|
|
|
|
if (files[key].contains(offset))
|
2022-02-18 15:38:23 +00:00
|
|
|
throw Exception(ErrorCodes::REMOTE_FS_OBJECT_CACHE_ERROR,
|
2022-01-13 11:57:56 +00:00
|
|
|
"Cache already exists for key: `{}`, offset: {}, size: {}", keyToStr(key), offset, size);
|
|
|
|
|
2022-01-21 15:39:34 +00:00
|
|
|
auto file_segment = std::make_shared<FileSegment>(offset, size, key, this, state);
|
2022-01-22 22:56:24 +00:00
|
|
|
FileSegmentCell cell(std::move(file_segment), queue);
|
2022-01-13 11:57:56 +00:00
|
|
|
|
|
|
|
auto & offsets = files[key];
|
|
|
|
|
|
|
|
if (offsets.empty())
|
|
|
|
{
|
2022-02-18 15:38:23 +00:00
|
|
|
auto key_path = getPathInLocalCache(key);
|
2022-01-13 11:57:56 +00:00
|
|
|
if (!fs::exists(key_path))
|
|
|
|
fs::create_directories(key_path);
|
|
|
|
}
|
|
|
|
|
|
|
|
auto [it, inserted] = offsets.insert({offset, std::move(cell)});
|
|
|
|
if (!inserted)
|
2022-02-18 15:38:23 +00:00
|
|
|
throw Exception(ErrorCodes::LOGICAL_ERROR,
|
2022-01-13 11:57:56 +00:00
|
|
|
"Failed to insert into cache key: `{}`, offset: {}, size: {}", keyToStr(key), offset, size);
|
|
|
|
|
|
|
|
return &(it->second);
|
|
|
|
}
|
|
|
|
|
2022-01-24 22:07:02 +00:00
|
|
|
bool LRUFileCache::tryReserve(const Key & key_, size_t offset_, size_t size, std::lock_guard<std::mutex> & cache_lock)
|
2022-01-21 15:39:34 +00:00
|
|
|
{
|
2022-01-23 16:51:18 +00:00
|
|
|
auto removed_size = 0;
|
|
|
|
size_t queue_size = queue.size();
|
|
|
|
assert(queue_size <= max_element_size);
|
2022-01-22 22:56:24 +00:00
|
|
|
|
2022-01-30 11:35:28 +00:00
|
|
|
/// Since space reservation is incremental, cache cell already exists if it's state is EMPTY.
|
2022-01-23 16:51:18 +00:00
|
|
|
/// And it cache cell does not exist on startup -- as we first check for space and then add a cell.
|
|
|
|
auto * cell_for_reserve = getCell(key_, offset_, cache_lock);
|
2022-01-22 22:56:24 +00:00
|
|
|
|
2022-01-23 16:51:18 +00:00
|
|
|
/// A cell acquires a LRUQueue iterator on first successful space reservation attempt.
|
2022-02-21 12:54:03 +00:00
|
|
|
/// cell_for_reserve can be nullptr here when we call tryReserve() from loadCacheInfoIntoMemory().
|
2022-01-23 16:51:18 +00:00
|
|
|
if (!cell_for_reserve || !cell_for_reserve->queue_iterator)
|
|
|
|
queue_size += 1;
|
2022-01-13 11:57:56 +00:00
|
|
|
|
|
|
|
auto is_overflow = [&]
|
|
|
|
{
|
|
|
|
return (current_size + size - removed_size > max_size)
|
|
|
|
|| (max_element_size != 0 && queue_size > max_element_size);
|
|
|
|
};
|
|
|
|
|
2022-01-21 15:39:34 +00:00
|
|
|
std::vector<FileKeyAndOffset> to_evict;
|
2022-01-13 11:57:56 +00:00
|
|
|
|
|
|
|
auto key_it = queue.begin();
|
|
|
|
while (is_overflow() && key_it != queue.end())
|
|
|
|
{
|
|
|
|
const auto [key, offset] = *key_it++;
|
|
|
|
|
|
|
|
auto * cell = getCell(key, offset, cache_lock);
|
|
|
|
if (!cell)
|
2022-02-18 15:38:23 +00:00
|
|
|
throw Exception(ErrorCodes::REMOTE_FS_OBJECT_CACHE_ERROR,
|
2022-01-13 11:57:56 +00:00
|
|
|
"Cache became inconsistent. Key: {}, offset: {}", keyToStr(key), offset);
|
|
|
|
|
|
|
|
size_t cell_size = cell->size();
|
|
|
|
|
|
|
|
/// It is guaranteed that cell is not removed from cache as long as
|
|
|
|
/// pointer to corresponding file segment is hold by any other thread.
|
|
|
|
|
|
|
|
if (cell->releasable())
|
|
|
|
{
|
2022-01-23 16:51:18 +00:00
|
|
|
switch (cell->file_segment->download_state)
|
2022-01-13 11:57:56 +00:00
|
|
|
{
|
|
|
|
case FileSegment::State::DOWNLOADED:
|
|
|
|
{
|
|
|
|
/// Cell will actually be removed only if
|
|
|
|
/// we managed to reserve enough space.
|
|
|
|
|
2022-01-21 15:39:34 +00:00
|
|
|
to_evict.emplace_back(key, offset);
|
|
|
|
break;
|
|
|
|
}
|
2022-01-13 11:57:56 +00:00
|
|
|
default:
|
|
|
|
{
|
2022-01-21 15:39:34 +00:00
|
|
|
remove(key, offset, cache_lock);
|
2022-01-13 11:57:56 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
removed_size += cell_size;
|
|
|
|
--queue_size;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (is_overflow())
|
|
|
|
return false;
|
|
|
|
|
2022-01-23 16:51:18 +00:00
|
|
|
if (cell_for_reserve && !cell_for_reserve->queue_iterator)
|
|
|
|
cell_for_reserve->queue_iterator = queue.insert(queue.end(), std::make_pair(key_, offset_));
|
|
|
|
|
2022-01-21 15:39:34 +00:00
|
|
|
for (auto & [key, offset] : to_evict)
|
|
|
|
remove(key, offset, cache_lock);
|
2022-01-13 11:57:56 +00:00
|
|
|
|
|
|
|
current_size += size - removed_size;
|
|
|
|
if (current_size > (1ull << 63))
|
2022-02-18 15:38:23 +00:00
|
|
|
throw Exception(ErrorCodes::LOGICAL_ERROR, "Cache became inconsistent. There must be a bug");
|
2022-01-13 11:57:56 +00:00
|
|
|
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
2022-01-21 15:39:34 +00:00
|
|
|
void LRUFileCache::remove(
|
2022-01-24 22:07:02 +00:00
|
|
|
Key key, size_t offset, std::lock_guard<std::mutex> & cache_lock)
|
2022-01-13 11:57:56 +00:00
|
|
|
{
|
2022-01-21 15:39:34 +00:00
|
|
|
LOG_TEST(log, "Remove. Key: {}, offset: {}", keyToStr(key), offset);
|
2022-01-13 11:57:56 +00:00
|
|
|
|
2022-01-23 17:33:22 +00:00
|
|
|
auto * cell = getCell(key, offset, cache_lock);
|
|
|
|
if (!cell)
|
2022-02-18 15:38:23 +00:00
|
|
|
throw Exception(ErrorCodes::REMOTE_FS_OBJECT_CACHE_ERROR, "No cache cell for key: {}, offset: {}", keyToStr(key), offset);
|
2022-01-23 17:33:22 +00:00
|
|
|
|
|
|
|
if (cell->queue_iterator)
|
|
|
|
queue.erase(*cell->queue_iterator);
|
2022-01-13 11:57:56 +00:00
|
|
|
|
2022-01-21 15:39:34 +00:00
|
|
|
auto & offsets = files[key];
|
|
|
|
offsets.erase(offset);
|
2022-01-13 11:57:56 +00:00
|
|
|
|
2022-02-18 15:38:23 +00:00
|
|
|
auto cache_file_path = getPathInLocalCache(key, offset);
|
2022-01-13 11:57:56 +00:00
|
|
|
if (fs::exists(cache_file_path))
|
|
|
|
{
|
|
|
|
try
|
|
|
|
{
|
|
|
|
fs::remove(cache_file_path);
|
|
|
|
|
2022-01-21 15:39:34 +00:00
|
|
|
if (startup_restore_finished && offsets.empty())
|
2022-02-18 15:38:23 +00:00
|
|
|
{
|
|
|
|
auto key_path = getPathInLocalCache(key);
|
|
|
|
|
|
|
|
files.erase(key);
|
|
|
|
|
|
|
|
if (fs::exists(key_path))
|
|
|
|
fs::remove(key_path);
|
|
|
|
}
|
2022-01-13 11:57:56 +00:00
|
|
|
}
|
|
|
|
catch (...)
|
|
|
|
{
|
2022-02-18 15:38:23 +00:00
|
|
|
throw Exception(ErrorCodes::REMOTE_FS_OBJECT_CACHE_ERROR,
|
2022-01-13 11:57:56 +00:00
|
|
|
"Removal of cached file failed. Key: {}, offset: {}, path: {}, error: {}",
|
|
|
|
keyToStr(key), offset, cache_file_path, getCurrentExceptionMessage(false));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2022-02-18 15:38:23 +00:00
|
|
|
void LRUFileCache::loadCacheInfoIntoMemory()
|
2022-01-13 11:57:56 +00:00
|
|
|
{
|
|
|
|
std::lock_guard cache_lock(mutex);
|
|
|
|
|
|
|
|
Key key;
|
|
|
|
UInt64 offset;
|
|
|
|
size_t size;
|
|
|
|
std::vector<FileSegmentCell *> cells;
|
|
|
|
|
|
|
|
/// cache_base_path / key_prefix / key / offset
|
|
|
|
|
|
|
|
fs::directory_iterator key_prefix_it{cache_base_path};
|
|
|
|
for (; key_prefix_it != fs::directory_iterator(); ++key_prefix_it)
|
|
|
|
{
|
|
|
|
fs::directory_iterator key_it{key_prefix_it->path()};
|
|
|
|
for (; key_it != fs::directory_iterator(); ++key_it)
|
|
|
|
{
|
2022-01-21 15:39:34 +00:00
|
|
|
key = unhexUInt<UInt128>(key_it->path().filename().string().data());
|
2022-01-13 11:57:56 +00:00
|
|
|
|
|
|
|
fs::directory_iterator offset_it{key_it->path()};
|
|
|
|
for (; offset_it != fs::directory_iterator(); ++offset_it)
|
|
|
|
{
|
|
|
|
bool parsed = tryParse<UInt64>(offset, offset_it->path().filename());
|
|
|
|
if (!parsed)
|
2022-01-23 16:51:18 +00:00
|
|
|
{
|
|
|
|
LOG_WARNING(log, "Unexpected file: ", offset_it->path().string());
|
2022-02-15 09:11:33 +00:00
|
|
|
continue; /// Or just remove? Some unexpected file.
|
2022-01-23 16:51:18 +00:00
|
|
|
}
|
2022-01-13 11:57:56 +00:00
|
|
|
|
|
|
|
size = offset_it->file_size();
|
2022-01-23 16:51:18 +00:00
|
|
|
if (!size)
|
|
|
|
{
|
|
|
|
fs::remove(offset_it->path());
|
|
|
|
continue;
|
|
|
|
}
|
2022-01-13 11:57:56 +00:00
|
|
|
|
2022-01-23 16:51:18 +00:00
|
|
|
if (tryReserve(key, offset, size, cache_lock))
|
2022-01-13 11:57:56 +00:00
|
|
|
{
|
2022-01-23 16:51:18 +00:00
|
|
|
auto * cell = addCell(key, offset, size, FileSegment::State::DOWNLOADED, cache_lock);
|
|
|
|
if (cell)
|
|
|
|
cells.push_back(cell);
|
2022-01-13 11:57:56 +00:00
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
LOG_WARNING(log,
|
|
|
|
"Cache capacity changed (max size: {}, available: {}), cached file `{}` does not fit in cache anymore (size: {})",
|
2022-01-24 22:07:02 +00:00
|
|
|
max_size, availableSize(), key_it->path().string(), size);
|
2022-01-23 16:51:18 +00:00
|
|
|
fs::remove(offset_it->path());
|
2022-01-13 11:57:56 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Shuffle cells to have random order in LRUQueue as at startup all cells have the same priority.
|
|
|
|
pcg64 generator(randomSeed());
|
|
|
|
std::shuffle(cells.begin(), cells.end(), generator);
|
|
|
|
for (const auto & cell : cells)
|
2022-01-21 15:39:34 +00:00
|
|
|
queue.splice(queue.end(), queue, *cell->queue_iterator);
|
2022-01-13 11:57:56 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void LRUFileCache::remove(const Key & key)
|
|
|
|
{
|
|
|
|
std::lock_guard cache_lock(mutex);
|
|
|
|
|
|
|
|
auto it = files.find(key);
|
|
|
|
if (it == files.end())
|
|
|
|
return;
|
|
|
|
|
2022-01-21 15:39:34 +00:00
|
|
|
auto & offsets = it->second;
|
2022-01-13 11:57:56 +00:00
|
|
|
|
2022-01-21 15:39:34 +00:00
|
|
|
for (auto & [offset, _] : offsets)
|
|
|
|
remove(key, offset, cache_lock);
|
|
|
|
}
|
|
|
|
|
2022-01-13 11:57:56 +00:00
|
|
|
LRUFileCache::Stat LRUFileCache::getStat()
|
|
|
|
{
|
|
|
|
std::lock_guard cache_lock(mutex);
|
|
|
|
|
|
|
|
Stat stat
|
|
|
|
{
|
|
|
|
.size = queue.size(),
|
2022-01-24 22:07:02 +00:00
|
|
|
.available = availableSize(),
|
2022-01-13 11:57:56 +00:00
|
|
|
.downloaded_size = 0,
|
|
|
|
.downloading_size = 0,
|
|
|
|
};
|
|
|
|
|
|
|
|
for (const auto & [key, offset] : queue)
|
|
|
|
{
|
|
|
|
const auto * cell = getCell(key, offset, cache_lock);
|
|
|
|
if (!cell)
|
2022-02-18 15:38:23 +00:00
|
|
|
throw Exception(ErrorCodes::REMOTE_FS_OBJECT_CACHE_ERROR,
|
2022-01-13 11:57:56 +00:00
|
|
|
"Cache became inconsistent. Key: {}, offset: {}", keyToStr(key), offset);
|
|
|
|
|
2022-01-23 16:51:18 +00:00
|
|
|
switch (cell->file_segment->download_state)
|
2022-01-13 11:57:56 +00:00
|
|
|
{
|
|
|
|
case FileSegment::State::DOWNLOADED:
|
|
|
|
{
|
|
|
|
++stat.downloaded_size;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case FileSegment::State::DOWNLOADING:
|
|
|
|
{
|
|
|
|
++stat.downloading_size;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return stat;
|
|
|
|
}
|
|
|
|
|
2022-01-22 22:56:24 +00:00
|
|
|
void LRUFileCache::reduceSizeToDownloaded(
|
2022-01-24 22:07:02 +00:00
|
|
|
const Key & key, size_t offset, std::lock_guard<std::mutex> & cache_lock)
|
2022-01-21 15:39:34 +00:00
|
|
|
{
|
2022-01-22 22:56:24 +00:00
|
|
|
/**
|
|
|
|
* In case file was partially downloaded and it's download cannot be continued
|
|
|
|
* because of no space left in cache, we need to be able to cut cell's size to downloaded_size.
|
|
|
|
*/
|
2022-01-21 15:39:34 +00:00
|
|
|
|
2022-01-22 22:56:24 +00:00
|
|
|
auto * cell = getCell(key, offset, cache_lock);
|
2022-01-21 15:39:34 +00:00
|
|
|
|
2022-01-22 22:56:24 +00:00
|
|
|
if (!cell)
|
2022-02-18 15:38:23 +00:00
|
|
|
throw Exception(ErrorCodes::REMOTE_FS_OBJECT_CACHE_ERROR, "No cell found for key: {}, offset: {}", keyToStr(key), offset);
|
2022-01-21 15:39:34 +00:00
|
|
|
|
2022-01-22 22:56:24 +00:00
|
|
|
const auto & file_segment = cell->file_segment;
|
2022-01-21 15:39:34 +00:00
|
|
|
|
2022-01-22 22:56:24 +00:00
|
|
|
size_t downloaded_size = file_segment->downloaded_size;
|
|
|
|
if (downloaded_size == file_segment->range().size())
|
2022-02-18 15:38:23 +00:00
|
|
|
throw Exception(ErrorCodes::REMOTE_FS_OBJECT_CACHE_ERROR,
|
2022-01-22 22:56:24 +00:00
|
|
|
"Nothing to reduce, file segment fully downloaded, key: {}, offset: {}", keyToStr(key), offset);
|
2022-01-13 11:57:56 +00:00
|
|
|
|
2022-01-22 22:56:24 +00:00
|
|
|
cell->file_segment = std::make_shared<FileSegment>(offset, downloaded_size, key, this, FileSegment::State::DOWNLOADED);
|
2022-01-21 15:39:34 +00:00
|
|
|
}
|
|
|
|
|
2022-01-23 16:51:18 +00:00
|
|
|
bool LRUFileCache::isLastFileSegmentHolder(
|
2022-01-24 22:07:02 +00:00
|
|
|
const Key & key, size_t offset, std::lock_guard<std::mutex> & cache_lock)
|
2022-01-21 15:39:34 +00:00
|
|
|
{
|
2022-01-23 16:51:18 +00:00
|
|
|
auto * cell = getCell(key, offset, cache_lock);
|
|
|
|
|
|
|
|
if (!cell)
|
|
|
|
throw Exception(ErrorCodes::LOGICAL_ERROR, "No cell found for key: {}, offset: {}", keyToStr(key), offset);
|
|
|
|
|
2022-02-15 09:11:33 +00:00
|
|
|
/// The caller of this method is last file segment holder if use count is 2 (the second pointer is cache itself)
|
2022-01-23 16:51:18 +00:00
|
|
|
return cell->file_segment.use_count() == 2;
|
2022-01-13 11:57:56 +00:00
|
|
|
}
|
|
|
|
|
2022-01-22 22:56:24 +00:00
|
|
|
LRUFileCache::FileSegmentCell::FileSegmentCell(FileSegmentPtr file_segment_, LRUQueue & queue_)
|
|
|
|
: file_segment(file_segment_)
|
2022-01-13 11:57:56 +00:00
|
|
|
{
|
2022-01-22 22:56:24 +00:00
|
|
|
/**
|
|
|
|
* Cell can be created with either DOWNLOADED or EMPTY file segment's state.
|
2022-01-23 16:51:18 +00:00
|
|
|
* File segment acquires DOWNLOADING state and creates LRUQueue iterator on first
|
2022-01-22 22:56:24 +00:00
|
|
|
* successful getOrSetDownaloder call.
|
|
|
|
*/
|
2022-01-13 11:57:56 +00:00
|
|
|
|
2022-01-22 22:56:24 +00:00
|
|
|
switch (file_segment->download_state)
|
2022-01-13 11:57:56 +00:00
|
|
|
{
|
2022-01-22 22:56:24 +00:00
|
|
|
case FileSegment::State::DOWNLOADED:
|
2022-01-13 11:57:56 +00:00
|
|
|
{
|
2022-01-22 22:56:24 +00:00
|
|
|
queue_iterator = queue_.insert(queue_.end(), getKeyAndOffset());
|
2022-01-13 11:57:56 +00:00
|
|
|
break;
|
|
|
|
}
|
2022-01-22 22:56:24 +00:00
|
|
|
case FileSegment::State::EMPTY:
|
2022-01-13 11:57:56 +00:00
|
|
|
{
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
default:
|
2022-02-18 15:38:23 +00:00
|
|
|
throw Exception(ErrorCodes::REMOTE_FS_OBJECT_CACHE_ERROR,
|
2022-01-22 22:56:24 +00:00
|
|
|
"Can create cell with either DOWNLOADED or EMPTY state, got: {}",
|
2022-01-26 18:43:23 +00:00
|
|
|
FileSegment::stateToString(file_segment->download_state));
|
2022-01-13 11:57:56 +00:00
|
|
|
}
|
2022-01-21 15:39:34 +00:00
|
|
|
}
|
|
|
|
|
2022-01-26 09:35:46 +00:00
|
|
|
String LRUFileCache::dumpStructure(const Key & key_)
|
2022-01-21 15:39:34 +00:00
|
|
|
{
|
|
|
|
std::lock_guard cache_lock(mutex);
|
|
|
|
|
|
|
|
WriteBufferFromOwnString result;
|
|
|
|
for (auto it = queue.begin(); it != queue.end(); ++it)
|
|
|
|
{
|
|
|
|
auto [key, offset] = *it;
|
2022-01-26 09:35:46 +00:00
|
|
|
if (key == key_)
|
|
|
|
{
|
|
|
|
auto * cell = getCell(key, offset, cache_lock);
|
|
|
|
result << (it != queue.begin() ? ", " : "") << cell->file_segment->range().toString();
|
|
|
|
result << "(state: " << cell->file_segment->download_state << ")";
|
|
|
|
}
|
2022-01-13 11:57:56 +00:00
|
|
|
}
|
2022-01-21 15:39:34 +00:00
|
|
|
return result.str();
|
|
|
|
}
|
2022-01-13 11:57:56 +00:00
|
|
|
|
|
|
|
}
|