rocksdb/file/delete_scheduler_test.cc

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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
#include "file/delete_scheduler.h"
#include <atomic>
#include <cinttypes>
#include <thread>
#include <vector>
#include "file/file_util.h"
#include "file/sst_file_manager_impl.h"
#include "rocksdb/env.h"
#include "rocksdb/options.h"
#include "test_util/sync_point.h"
#include "test_util/testharness.h"
#include "util/string_util.h"
#ifndef ROCKSDB_LITE
namespace ROCKSDB_NAMESPACE {
class DeleteSchedulerTest : public testing::Test {
public:
DeleteSchedulerTest() : env_(Env::Default()) {
const int kNumDataDirs = 3;
dummy_files_dirs_.reserve(kNumDataDirs);
for (size_t i = 0; i < kNumDataDirs; ++i) {
dummy_files_dirs_.emplace_back(
test::PerThreadDBPath(env_, "delete_scheduler_dummy_data_dir") +
ToString(i));
DestroyAndCreateDir(dummy_files_dirs_.back());
}
stats_ = ROCKSDB_NAMESPACE::CreateDBStatistics();
}
~DeleteSchedulerTest() override {
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->LoadDependency({});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->ClearAllCallBacks();
for (const auto& dummy_files_dir : dummy_files_dirs_) {
DestroyDir(env_, dummy_files_dir);
}
}
void DestroyAndCreateDir(const std::string& dir) {
ASSERT_OK(DestroyDir(env_, dir));
EXPECT_OK(env_->CreateDir(dir));
}
int CountNormalFiles(size_t dummy_files_dirs_idx = 0) {
std::vector<std::string> files_in_dir;
EXPECT_OK(env_->GetChildren(dummy_files_dirs_[dummy_files_dirs_idx],
&files_in_dir));
int normal_cnt = 0;
for (auto& f : files_in_dir) {
if (!DeleteScheduler::IsTrashFile(f)) {
normal_cnt++;
}
}
return normal_cnt;
}
int CountTrashFiles(size_t dummy_files_dirs_idx = 0) {
std::vector<std::string> files_in_dir;
EXPECT_OK(env_->GetChildren(dummy_files_dirs_[dummy_files_dirs_idx],
&files_in_dir));
int trash_cnt = 0;
for (auto& f : files_in_dir) {
if (DeleteScheduler::IsTrashFile(f)) {
trash_cnt++;
}
}
return trash_cnt;
}
std::string NewDummyFile(const std::string& file_name, uint64_t size = 1024,
size_t dummy_files_dirs_idx = 0) {
std::string file_path =
dummy_files_dirs_[dummy_files_dirs_idx] + "/" + file_name;
std::unique_ptr<WritableFile> f;
env_->NewWritableFile(file_path, &f, EnvOptions());
std::string data(size, 'A');
EXPECT_OK(f->Append(data));
EXPECT_OK(f->Close());
sst_file_mgr_->OnAddFile(file_path);
return file_path;
}
void NewDeleteScheduler() {
// Tests in this file are for DeleteScheduler component and don't create any
// DBs, so we need to set max_trash_db_ratio to 100% (instead of default
// 25%)
sst_file_mgr_.reset(
new SstFileManagerImpl(env_->GetSystemClock(), env_->GetFileSystem(),
nullptr, rate_bytes_per_sec_,
/* max_trash_db_ratio= */ 1.1, 128 * 1024));
delete_scheduler_ = sst_file_mgr_->delete_scheduler();
sst_file_mgr_->SetStatisticsPtr(stats_);
}
Env* env_;
std::vector<std::string> dummy_files_dirs_;
int64_t rate_bytes_per_sec_;
DeleteScheduler* delete_scheduler_;
std::unique_ptr<SstFileManagerImpl> sst_file_mgr_;
std::shared_ptr<Statistics> stats_;
};
// Test the basic functionality of DeleteScheduler (Rate Limiting).
// 1- Create 100 dummy files
// 2- Delete the 100 dummy files using DeleteScheduler
// --- Hold DeleteScheduler::BackgroundEmptyTrash ---
// 3- Wait for DeleteScheduler to delete all files in trash
// 4- Verify that BackgroundEmptyTrash used to correct penlties for the files
// 5- Make sure that all created files were completely deleted
TEST_F(DeleteSchedulerTest, BasicRateLimiting) {
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->LoadDependency({
{"DeleteSchedulerTest::BasicRateLimiting:1",
"DeleteScheduler::BackgroundEmptyTrash"},
});
std::vector<uint64_t> penalties;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DeleteScheduler::BackgroundEmptyTrash:Wait",
[&](void* arg) { penalties.push_back(*(static_cast<uint64_t*>(arg))); });
int dir_synced = 0;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DeleteScheduler::DeleteTrashFile::AfterSyncDir", [&](void* arg) {
dir_synced++;
std::string* dir = reinterpret_cast<std::string*>(arg);
EXPECT_EQ(dummy_files_dirs_[0], *dir);
});
int num_files = 100; // 100 files
uint64_t file_size = 1024; // every file is 1 kb
std::vector<uint64_t> delete_kbs_per_sec = {512, 200, 100, 50, 25};
for (size_t t = 0; t < delete_kbs_per_sec.size(); t++) {
penalties.clear();
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->ClearTrace();
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
DestroyAndCreateDir(dummy_files_dirs_[0]);
rate_bytes_per_sec_ = delete_kbs_per_sec[t] * 1024;
NewDeleteScheduler();
dir_synced = 0;
// Create 100 dummy files, every file is 1 Kb
std::vector<std::string> generated_files;
for (int i = 0; i < num_files; i++) {
std::string file_name = "file" + ToString(i) + ".data";
generated_files.push_back(NewDummyFile(file_name, file_size));
}
// Delete dummy files and measure time spent to empty trash
for (int i = 0; i < num_files; i++) {
ASSERT_OK(delete_scheduler_->DeleteFile(generated_files[i],
dummy_files_dirs_[0]));
}
ASSERT_EQ(CountNormalFiles(), 0);
uint64_t delete_start_time = env_->NowMicros();
TEST_SYNC_POINT("DeleteSchedulerTest::BasicRateLimiting:1");
delete_scheduler_->WaitForEmptyTrash();
uint64_t time_spent_deleting = env_->NowMicros() - delete_start_time;
auto bg_errors = delete_scheduler_->GetBackgroundErrors();
ASSERT_EQ(bg_errors.size(), 0);
uint64_t total_files_size = 0;
uint64_t expected_penlty = 0;
ASSERT_EQ(penalties.size(), num_files);
for (int i = 0; i < num_files; i++) {
total_files_size += file_size;
expected_penlty = ((total_files_size * 1000000) / rate_bytes_per_sec_);
ASSERT_EQ(expected_penlty, penalties[i]);
}
ASSERT_GT(time_spent_deleting, expected_penlty * 0.9);
ASSERT_EQ(num_files, dir_synced);
ASSERT_EQ(CountTrashFiles(), 0);
ASSERT_EQ(num_files, stats_->getAndResetTickerCount(FILES_MARKED_TRASH));
ASSERT_EQ(0, stats_->getAndResetTickerCount(FILES_DELETED_IMMEDIATELY));
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
}
TEST_F(DeleteSchedulerTest, MultiDirectoryDeletionsScheduled) {
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->LoadDependency({
{"DeleteSchedulerTest::MultiDbPathDeletionsScheduled:1",
"DeleteScheduler::BackgroundEmptyTrash"},
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
rate_bytes_per_sec_ = 1 << 20; // 1MB
NewDeleteScheduler();
// Generate dummy files in multiple directories
const size_t kNumFiles = dummy_files_dirs_.size();
const size_t kFileSize = 1 << 10; // 1KB
std::vector<std::string> generated_files;
for (size_t i = 0; i < kNumFiles; i++) {
generated_files.push_back(NewDummyFile("file", kFileSize, i));
ASSERT_EQ(1, CountNormalFiles(i));
}
// Mark dummy files as trash
for (size_t i = 0; i < kNumFiles; i++) {
ASSERT_OK(delete_scheduler_->DeleteFile(generated_files[i], ""));
ASSERT_EQ(0, CountNormalFiles(i));
ASSERT_EQ(1, CountTrashFiles(i));
}
TEST_SYNC_POINT("DeleteSchedulerTest::MultiDbPathDeletionsScheduled:1");
delete_scheduler_->WaitForEmptyTrash();
// Verify dummy files eventually got deleted
for (size_t i = 0; i < kNumFiles; i++) {
ASSERT_EQ(0, CountNormalFiles(i));
ASSERT_EQ(0, CountTrashFiles(i));
}
ASSERT_EQ(kNumFiles, stats_->getAndResetTickerCount(FILES_MARKED_TRASH));
ASSERT_EQ(0, stats_->getAndResetTickerCount(FILES_DELETED_IMMEDIATELY));
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
// Same as the BasicRateLimiting test but delete files in multiple threads.
// 1- Create 100 dummy files
// 2- Delete the 100 dummy files using DeleteScheduler using 10 threads
// --- Hold DeleteScheduler::BackgroundEmptyTrash ---
// 3- Wait for DeleteScheduler to delete all files in queue
// 4- Verify that BackgroundEmptyTrash used to correct penlties for the files
// 5- Make sure that all created files were completely deleted
TEST_F(DeleteSchedulerTest, RateLimitingMultiThreaded) {
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->LoadDependency({
{"DeleteSchedulerTest::RateLimitingMultiThreaded:1",
"DeleteScheduler::BackgroundEmptyTrash"},
});
std::vector<uint64_t> penalties;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DeleteScheduler::BackgroundEmptyTrash:Wait",
[&](void* arg) { penalties.push_back(*(static_cast<uint64_t*>(arg))); });
int thread_cnt = 10;
int num_files = 10; // 10 files per thread
uint64_t file_size = 1024; // every file is 1 kb
std::vector<uint64_t> delete_kbs_per_sec = {512, 200, 100, 50, 25};
for (size_t t = 0; t < delete_kbs_per_sec.size(); t++) {
penalties.clear();
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->ClearTrace();
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
DestroyAndCreateDir(dummy_files_dirs_[0]);
rate_bytes_per_sec_ = delete_kbs_per_sec[t] * 1024;
NewDeleteScheduler();
// Create 100 dummy files, every file is 1 Kb
std::vector<std::string> generated_files;
for (int i = 0; i < num_files * thread_cnt; i++) {
std::string file_name = "file" + ToString(i) + ".data";
generated_files.push_back(NewDummyFile(file_name, file_size));
}
// Delete dummy files using 10 threads and measure time spent to empty trash
std::atomic<int> thread_num(0);
std::vector<port::Thread> threads;
std::function<void()> delete_thread = [&]() {
int idx = thread_num.fetch_add(1);
int range_start = idx * num_files;
int range_end = range_start + num_files;
for (int j = range_start; j < range_end; j++) {
ASSERT_OK(delete_scheduler_->DeleteFile(generated_files[j], ""));
}
};
for (int i = 0; i < thread_cnt; i++) {
threads.emplace_back(delete_thread);
}
for (size_t i = 0; i < threads.size(); i++) {
threads[i].join();
}
uint64_t delete_start_time = env_->NowMicros();
TEST_SYNC_POINT("DeleteSchedulerTest::RateLimitingMultiThreaded:1");
delete_scheduler_->WaitForEmptyTrash();
uint64_t time_spent_deleting = env_->NowMicros() - delete_start_time;
auto bg_errors = delete_scheduler_->GetBackgroundErrors();
ASSERT_EQ(bg_errors.size(), 0);
uint64_t total_files_size = 0;
uint64_t expected_penlty = 0;
ASSERT_EQ(penalties.size(), num_files * thread_cnt);
for (int i = 0; i < num_files * thread_cnt; i++) {
total_files_size += file_size;
expected_penlty = ((total_files_size * 1000000) / rate_bytes_per_sec_);
ASSERT_EQ(expected_penlty, penalties[i]);
}
ASSERT_GT(time_spent_deleting, expected_penlty * 0.9);
ASSERT_EQ(CountNormalFiles(), 0);
ASSERT_EQ(CountTrashFiles(), 0);
ASSERT_EQ(num_files * thread_cnt,
stats_->getAndResetTickerCount(FILES_MARKED_TRASH));
ASSERT_EQ(0, stats_->getAndResetTickerCount(FILES_DELETED_IMMEDIATELY));
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
}
// Disable rate limiting by setting rate_bytes_per_sec_ to 0 and make sure
// that when DeleteScheduler delete a file it delete it immediately and don't
// move it to trash
TEST_F(DeleteSchedulerTest, DisableRateLimiting) {
int bg_delete_file = 0;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DeleteScheduler::DeleteTrashFile:DeleteFile",
[&](void* /*arg*/) { bg_delete_file++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
rate_bytes_per_sec_ = 0;
NewDeleteScheduler();
constexpr int num_files = 10;
for (int i = 0; i < num_files; i++) {
// Every file we delete will be deleted immediately
std::string dummy_file = NewDummyFile("dummy.data");
ASSERT_OK(delete_scheduler_->DeleteFile(dummy_file, ""));
ASSERT_TRUE(env_->FileExists(dummy_file).IsNotFound());
ASSERT_EQ(CountNormalFiles(), 0);
ASSERT_EQ(CountTrashFiles(), 0);
}
ASSERT_EQ(bg_delete_file, 0);
ASSERT_EQ(0, stats_->getAndResetTickerCount(FILES_MARKED_TRASH));
ASSERT_EQ(num_files,
stats_->getAndResetTickerCount(FILES_DELETED_IMMEDIATELY));
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
// Testing that moving files to trash with the same name is not a problem
// 1- Create 10 files with the same name "conflict.data"
// 2- Delete the 10 files using DeleteScheduler
// 3- Make sure that trash directory contain 10 files ("conflict.data" x 10)
// --- Hold DeleteScheduler::BackgroundEmptyTrash ---
// 4- Make sure that files are deleted from trash
TEST_F(DeleteSchedulerTest, ConflictNames) {
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->LoadDependency({
{"DeleteSchedulerTest::ConflictNames:1",
"DeleteScheduler::BackgroundEmptyTrash"},
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
rate_bytes_per_sec_ = 1024 * 1024; // 1 Mb/sec
NewDeleteScheduler();
// Create "conflict.data" and move it to trash 10 times
for (int i = 0; i < 10; i++) {
std::string dummy_file = NewDummyFile("conflict.data");
ASSERT_OK(delete_scheduler_->DeleteFile(dummy_file, ""));
}
ASSERT_EQ(CountNormalFiles(), 0);
// 10 files ("conflict.data" x 10) in trash
ASSERT_EQ(CountTrashFiles(), 10);
// Hold BackgroundEmptyTrash
TEST_SYNC_POINT("DeleteSchedulerTest::ConflictNames:1");
delete_scheduler_->WaitForEmptyTrash();
ASSERT_EQ(CountTrashFiles(), 0);
auto bg_errors = delete_scheduler_->GetBackgroundErrors();
ASSERT_EQ(bg_errors.size(), 0);
ASSERT_EQ(10, stats_->getAndResetTickerCount(FILES_MARKED_TRASH));
ASSERT_EQ(0, stats_->getAndResetTickerCount(FILES_DELETED_IMMEDIATELY));
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
// 1- Create 10 dummy files
// 2- Delete the 10 files using DeleteScheduler (move them to trsah)
// 3- Delete the 10 files directly (using env_->DeleteFile)
// --- Hold DeleteScheduler::BackgroundEmptyTrash ---
// 4- Make sure that DeleteScheduler failed to delete the 10 files and
// reported 10 background errors
TEST_F(DeleteSchedulerTest, BackgroundError) {
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->LoadDependency({
{"DeleteSchedulerTest::BackgroundError:1",
"DeleteScheduler::BackgroundEmptyTrash"},
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
rate_bytes_per_sec_ = 1024 * 1024; // 1 Mb/sec
NewDeleteScheduler();
// Generate 10 dummy files and move them to trash
for (int i = 0; i < 10; i++) {
std::string file_name = "data_" + ToString(i) + ".data";
ASSERT_OK(delete_scheduler_->DeleteFile(NewDummyFile(file_name), ""));
}
ASSERT_EQ(CountNormalFiles(), 0);
ASSERT_EQ(CountTrashFiles(), 10);
// Delete 10 files from trash, this will cause background errors in
// BackgroundEmptyTrash since we already deleted the files it was
// goind to delete
for (int i = 0; i < 10; i++) {
std::string file_name = "data_" + ToString(i) + ".data.trash";
ASSERT_OK(env_->DeleteFile(dummy_files_dirs_[0] + "/" + file_name));
}
// Hold BackgroundEmptyTrash
TEST_SYNC_POINT("DeleteSchedulerTest::BackgroundError:1");
delete_scheduler_->WaitForEmptyTrash();
auto bg_errors = delete_scheduler_->GetBackgroundErrors();
ASSERT_EQ(bg_errors.size(), 10);
for (const auto& it : bg_errors) {
ASSERT_TRUE(it.second.IsPathNotFound());
}
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
// 1- Create 10 dummy files
// 2- Delete 10 dummy files using DeleteScheduler
// 3- Wait for DeleteScheduler to delete all files in queue
// 4- Make sure all files in trash directory were deleted
// 5- Repeat previous steps 5 times
TEST_F(DeleteSchedulerTest, StartBGEmptyTrashMultipleTimes) {
int bg_delete_file = 0;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DeleteScheduler::DeleteTrashFile:DeleteFile",
[&](void* /*arg*/) { bg_delete_file++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
rate_bytes_per_sec_ = 1024 * 1024; // 1 MB / sec
NewDeleteScheduler();
// Move files to trash, wait for empty trash, start again
for (int run = 1; run <= 5; run++) {
// Generate 10 dummy files and move them to trash
for (int i = 0; i < 10; i++) {
std::string file_name = "data_" + ToString(i) + ".data";
ASSERT_OK(delete_scheduler_->DeleteFile(NewDummyFile(file_name), ""));
}
ASSERT_EQ(CountNormalFiles(), 0);
delete_scheduler_->WaitForEmptyTrash();
ASSERT_EQ(bg_delete_file, 10 * run);
ASSERT_EQ(CountTrashFiles(), 0);
auto bg_errors = delete_scheduler_->GetBackgroundErrors();
ASSERT_EQ(bg_errors.size(), 0);
ASSERT_EQ(10, stats_->getAndResetTickerCount(FILES_MARKED_TRASH));
ASSERT_EQ(0, stats_->getAndResetTickerCount(FILES_DELETED_IMMEDIATELY));
}
ASSERT_EQ(bg_delete_file, 50);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
}
TEST_F(DeleteSchedulerTest, DeletePartialFile) {
int bg_delete_file = 0;
int bg_fsync = 0;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DeleteScheduler::DeleteTrashFile:DeleteFile",
[&](void*) { bg_delete_file++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DeleteScheduler::DeleteTrashFile:Fsync", [&](void*) { bg_fsync++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
rate_bytes_per_sec_ = 1024 * 1024; // 1 MB / sec
NewDeleteScheduler();
// Should delete in 4 batch
ASSERT_OK(
delete_scheduler_->DeleteFile(NewDummyFile("data_1", 500 * 1024), ""));
ASSERT_OK(
delete_scheduler_->DeleteFile(NewDummyFile("data_2", 100 * 1024), ""));
// Should delete in 2 batch
ASSERT_OK(
delete_scheduler_->DeleteFile(NewDummyFile("data_2", 200 * 1024), ""));
delete_scheduler_->WaitForEmptyTrash();
auto bg_errors = delete_scheduler_->GetBackgroundErrors();
ASSERT_EQ(bg_errors.size(), 0);
ASSERT_EQ(7, bg_delete_file);
ASSERT_EQ(4, bg_fsync);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
}
#ifdef OS_LINUX
TEST_F(DeleteSchedulerTest, NoPartialDeleteWithLink) {
int bg_delete_file = 0;
int bg_fsync = 0;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DeleteScheduler::DeleteTrashFile:DeleteFile",
[&](void*) { bg_delete_file++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DeleteScheduler::DeleteTrashFile:Fsync", [&](void*) { bg_fsync++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
rate_bytes_per_sec_ = 1024 * 1024; // 1 MB / sec
NewDeleteScheduler();
std::string file1 = NewDummyFile("data_1", 500 * 1024);
std::string file2 = NewDummyFile("data_2", 100 * 1024);
ASSERT_OK(env_->LinkFile(file1, dummy_files_dirs_[0] + "/data_1b"));
ASSERT_OK(env_->LinkFile(file2, dummy_files_dirs_[0] + "/data_2b"));
// Should delete in 4 batch if there is no hardlink
ASSERT_OK(delete_scheduler_->DeleteFile(file1, ""));
ASSERT_OK(delete_scheduler_->DeleteFile(file2, ""));
delete_scheduler_->WaitForEmptyTrash();
auto bg_errors = delete_scheduler_->GetBackgroundErrors();
ASSERT_EQ(bg_errors.size(), 0);
ASSERT_EQ(2, bg_delete_file);
ASSERT_EQ(0, bg_fsync);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
}
#endif
// 1- Create a DeleteScheduler with very slow rate limit (1 Byte / sec)
// 2- Delete 100 files using DeleteScheduler
// 3- Delete the DeleteScheduler (call the destructor while queue is not empty)
// 4- Make sure that not all files were deleted from trash and that
// DeleteScheduler background thread did not delete all files
TEST_F(DeleteSchedulerTest, DestructorWithNonEmptyQueue) {
int bg_delete_file = 0;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DeleteScheduler::DeleteTrashFile:DeleteFile",
[&](void* /*arg*/) { bg_delete_file++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
rate_bytes_per_sec_ = 1; // 1 Byte / sec
NewDeleteScheduler();
for (int i = 0; i < 100; i++) {
std::string file_name = "data_" + ToString(i) + ".data";
ASSERT_OK(delete_scheduler_->DeleteFile(NewDummyFile(file_name), ""));
}
// Deleting 100 files will need >28 hours to delete
// we will delete the DeleteScheduler while delete queue is not empty
sst_file_mgr_.reset();
ASSERT_LT(bg_delete_file, 100);
ASSERT_GT(CountTrashFiles(), 0);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DeleteSchedulerTest, DISABLED_DynamicRateLimiting1) {
std::vector<uint64_t> penalties;
int bg_delete_file = 0;
int fg_delete_file = 0;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DeleteScheduler::DeleteTrashFile:DeleteFile",
[&](void* /*arg*/) { bg_delete_file++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DeleteScheduler::DeleteFile", [&](void* /*arg*/) { fg_delete_file++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DeleteScheduler::BackgroundEmptyTrash:Wait",
[&](void* arg) { penalties.push_back(*(static_cast<int*>(arg))); });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->LoadDependency({
{"DeleteSchedulerTest::DynamicRateLimiting1:1",
"DeleteScheduler::BackgroundEmptyTrash"},
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
rate_bytes_per_sec_ = 0; // Disable rate limiting initially
NewDeleteScheduler();
int num_files = 10; // 10 files
uint64_t file_size = 1024; // every file is 1 kb
std::vector<int64_t> delete_kbs_per_sec = {512, 200, 0, 100, 50, -2, 25};
for (size_t t = 0; t < delete_kbs_per_sec.size(); t++) {
penalties.clear();
bg_delete_file = 0;
fg_delete_file = 0;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->ClearTrace();
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
DestroyAndCreateDir(dummy_files_dirs_[0]);
rate_bytes_per_sec_ = delete_kbs_per_sec[t] * 1024;
delete_scheduler_->SetRateBytesPerSecond(rate_bytes_per_sec_);
// Create 100 dummy files, every file is 1 Kb
std::vector<std::string> generated_files;
for (int i = 0; i < num_files; i++) {
std::string file_name = "file" + ToString(i) + ".data";
generated_files.push_back(NewDummyFile(file_name, file_size));
}
// Delete dummy files and measure time spent to empty trash
for (int i = 0; i < num_files; i++) {
ASSERT_OK(delete_scheduler_->DeleteFile(generated_files[i], ""));
}
ASSERT_EQ(CountNormalFiles(), 0);
if (rate_bytes_per_sec_ > 0) {
uint64_t delete_start_time = env_->NowMicros();
TEST_SYNC_POINT("DeleteSchedulerTest::DynamicRateLimiting1:1");
delete_scheduler_->WaitForEmptyTrash();
uint64_t time_spent_deleting = env_->NowMicros() - delete_start_time;
auto bg_errors = delete_scheduler_->GetBackgroundErrors();
ASSERT_EQ(bg_errors.size(), 0);
uint64_t total_files_size = 0;
uint64_t expected_penlty = 0;
ASSERT_EQ(penalties.size(), num_files);
for (int i = 0; i < num_files; i++) {
total_files_size += file_size;
expected_penlty = ((total_files_size * 1000000) / rate_bytes_per_sec_);
ASSERT_EQ(expected_penlty, penalties[i]);
}
ASSERT_GT(time_spent_deleting, expected_penlty * 0.9);
ASSERT_EQ(bg_delete_file, num_files);
ASSERT_EQ(fg_delete_file, 0);
} else {
ASSERT_EQ(penalties.size(), 0);
ASSERT_EQ(bg_delete_file, 0);
ASSERT_EQ(fg_delete_file, num_files);
}
ASSERT_EQ(CountTrashFiles(), 0);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
}
TEST_F(DeleteSchedulerTest, ImmediateDeleteOn25PercDBSize) {
int bg_delete_file = 0;
int fg_delete_file = 0;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DeleteScheduler::DeleteTrashFile:DeleteFile",
[&](void* /*arg*/) { bg_delete_file++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DeleteScheduler::DeleteFile", [&](void* /*arg*/) { fg_delete_file++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
int num_files = 100; // 100 files
uint64_t file_size = 1024 * 10; // 100 KB as a file size
rate_bytes_per_sec_ = 1; // 1 byte per sec (very slow trash delete)
NewDeleteScheduler();
delete_scheduler_->SetMaxTrashDBRatio(0.25);
std::vector<std::string> generated_files;
for (int i = 0; i < num_files; i++) {
std::string file_name = "file" + ToString(i) + ".data";
generated_files.push_back(NewDummyFile(file_name, file_size));
}
for (std::string& file_name : generated_files) {
ASSERT_OK(delete_scheduler_->DeleteFile(file_name, ""));
}
// When we end up with 26 files in trash we will start
// deleting new files immediately
ASSERT_EQ(fg_delete_file, 74);
ASSERT_EQ(26, stats_->getAndResetTickerCount(FILES_MARKED_TRASH));
ASSERT_EQ(74, stats_->getAndResetTickerCount(FILES_DELETED_IMMEDIATELY));
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DeleteSchedulerTest, IsTrashCheck) {
// Trash files
ASSERT_TRUE(DeleteScheduler::IsTrashFile("x.trash"));
ASSERT_TRUE(DeleteScheduler::IsTrashFile(".trash"));
ASSERT_TRUE(DeleteScheduler::IsTrashFile("abc.sst.trash"));
ASSERT_TRUE(DeleteScheduler::IsTrashFile("/a/b/c/abc..sst.trash"));
ASSERT_TRUE(DeleteScheduler::IsTrashFile("log.trash"));
ASSERT_TRUE(DeleteScheduler::IsTrashFile("^^^^^.log.trash"));
ASSERT_TRUE(DeleteScheduler::IsTrashFile("abc.t.trash"));
// Not trash files
ASSERT_FALSE(DeleteScheduler::IsTrashFile("abc.sst"));
ASSERT_FALSE(DeleteScheduler::IsTrashFile("abc.txt"));
ASSERT_FALSE(DeleteScheduler::IsTrashFile("/a/b/c/abc.sst"));
ASSERT_FALSE(DeleteScheduler::IsTrashFile("/a/b/c/abc.sstrash"));
ASSERT_FALSE(DeleteScheduler::IsTrashFile("^^^^^.trashh"));
ASSERT_FALSE(DeleteScheduler::IsTrashFile("abc.ttrash"));
ASSERT_FALSE(DeleteScheduler::IsTrashFile(".ttrash"));
ASSERT_FALSE(DeleteScheduler::IsTrashFile("abc.trashx"));
}
} // namespace ROCKSDB_NAMESPACE
int main(int argc, char** argv) {
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
#else
int main(int /*argc*/, char** /*argv*/) {
printf("DeleteScheduler is not supported in ROCKSDB_LITE\n");
return 0;
}
#endif // ROCKSDB_LITE