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1441 lines
41 KiB
1441 lines
41 KiB
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#include "leveldb/db.h"
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#include "db/db_impl.h"
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#include "db/filename.h"
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#include "db/version_set.h"
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#include "db/write_batch_internal.h"
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#include "leveldb/env.h"
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#include "leveldb/table.h"
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#include "util/logging.h"
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#include "util/mutexlock.h"
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#include "util/testharness.h"
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#include "util/testutil.h"
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namespace leveldb {
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static std::string RandomString(Random* rnd, int len) {
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std::string r;
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test::RandomString(rnd, len, &r);
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return r;
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}
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// Special Env used to delay background operations
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class SpecialEnv : public EnvWrapper {
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public:
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// sstable Sync() calls are blocked while this pointer is non-NULL.
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port::AtomicPointer delay_sstable_sync_;
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explicit SpecialEnv(Env* base) : EnvWrapper(base) {
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delay_sstable_sync_.Release_Store(NULL);
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}
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Status NewWritableFile(const std::string& f, WritableFile** r) {
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class SSTableFile : public WritableFile {
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private:
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SpecialEnv* env_;
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WritableFile* base_;
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public:
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SSTableFile(SpecialEnv* env, WritableFile* base)
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: env_(env),
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base_(base) {
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}
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~SSTableFile() { delete base_; }
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Status Append(const Slice& data) { return base_->Append(data); }
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Status Close() { return base_->Close(); }
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Status Flush() { return base_->Flush(); }
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Status Sync() {
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while (env_->delay_sstable_sync_.Acquire_Load() != NULL) {
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env_->SleepForMicroseconds(100000);
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}
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return base_->Sync();
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}
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};
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Status s = target()->NewWritableFile(f, r);
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if (s.ok()) {
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if (strstr(f.c_str(), ".sst") != NULL) {
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*r = new SSTableFile(this, *r);
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}
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}
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return s;
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}
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};
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class DBTest {
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public:
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std::string dbname_;
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SpecialEnv* env_;
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DB* db_;
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Options last_options_;
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DBTest() : env_(new SpecialEnv(Env::Default())) {
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dbname_ = test::TmpDir() + "/db_test";
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DestroyDB(dbname_, Options());
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db_ = NULL;
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Reopen();
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}
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~DBTest() {
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delete db_;
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DestroyDB(dbname_, Options());
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delete env_;
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}
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DBImpl* dbfull() {
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return reinterpret_cast<DBImpl*>(db_);
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}
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void Reopen(Options* options = NULL) {
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ASSERT_OK(TryReopen(options));
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}
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void DestroyAndReopen(Options* options = NULL) {
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delete db_;
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db_ = NULL;
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DestroyDB(dbname_, Options());
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ASSERT_OK(TryReopen(options));
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}
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Status TryReopen(Options* options) {
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delete db_;
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db_ = NULL;
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Options opts;
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if (options != NULL) {
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opts = *options;
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} else {
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opts.create_if_missing = true;
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}
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last_options_ = opts;
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return DB::Open(opts, dbname_, &db_);
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}
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Status Put(const std::string& k, const std::string& v) {
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return db_->Put(WriteOptions(), k, v);
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}
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Status Delete(const std::string& k) {
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return db_->Delete(WriteOptions(), k);
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}
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std::string Get(const std::string& k, const Snapshot* snapshot = NULL) {
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ReadOptions options;
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options.snapshot = snapshot;
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std::string result;
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Status s = db_->Get(options, k, &result);
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if (s.IsNotFound()) {
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result = "NOT_FOUND";
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} else if (!s.ok()) {
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result = s.ToString();
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}
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return result;
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}
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std::string AllEntriesFor(const Slice& user_key) {
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Iterator* iter = dbfull()->TEST_NewInternalIterator();
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InternalKey target(user_key, kMaxSequenceNumber, kTypeValue);
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iter->Seek(target.Encode());
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std::string result;
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if (!iter->status().ok()) {
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result = iter->status().ToString();
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} else {
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result = "[ ";
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bool first = true;
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while (iter->Valid()) {
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ParsedInternalKey ikey;
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if (!ParseInternalKey(iter->key(), &ikey)) {
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result += "CORRUPTED";
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} else {
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if (last_options_.comparator->Compare(
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ikey.user_key, user_key) != 0) {
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break;
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}
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if (!first) {
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result += ", ";
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}
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first = false;
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switch (ikey.type) {
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case kTypeValue:
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result += iter->value().ToString();
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break;
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case kTypeDeletion:
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result += "DEL";
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break;
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}
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}
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iter->Next();
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}
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if (!first) {
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result += " ";
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}
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result += "]";
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}
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delete iter;
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return result;
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}
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int NumTableFilesAtLevel(int level) {
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std::string property;
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ASSERT_TRUE(
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db_->GetProperty("leveldb.num-files-at-level" + NumberToString(level),
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&property));
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return atoi(property.c_str());
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}
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int TotalTableFiles() {
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int result = 0;
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for (int level = 0; level < config::kNumLevels; level++) {
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result += NumTableFilesAtLevel(level);
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}
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return result;
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}
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uint64_t Size(const Slice& start, const Slice& limit) {
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Range r(start, limit);
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uint64_t size;
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db_->GetApproximateSizes(&r, 1, &size);
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return size;
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}
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void Compact(const Slice& start, const Slice& limit) {
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dbfull()->TEST_CompactMemTable();
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int max_level_with_files = 1;
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for (int level = 1; level < config::kNumLevels; level++) {
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if (NumTableFilesAtLevel(level) > 0) {
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max_level_with_files = level;
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}
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}
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for (int level = 0; level < max_level_with_files; level++) {
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dbfull()->TEST_CompactRange(level, "", "~");
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}
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}
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// Prevent pushing of new sstables into deeper levels by adding
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// tables that cover a specified range to all levels.
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void FillLevels(const std::string& smallest, const std::string& largest) {
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for (int level = 0; level < config::kNumLevels; level++) {
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Put(smallest, "begin");
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Put(largest, "end");
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dbfull()->TEST_CompactMemTable();
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}
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}
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void DumpFileCounts(const char* label) {
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fprintf(stderr, "---\n%s:\n", label);
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fprintf(stderr, "maxoverlap: %lld\n",
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static_cast<long long>(
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dbfull()->TEST_MaxNextLevelOverlappingBytes()));
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for (int level = 0; level < config::kNumLevels; level++) {
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int num = NumTableFilesAtLevel(level);
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if (num > 0) {
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fprintf(stderr, " level %3d : %d files\n", level, num);
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}
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}
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}
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std::string IterStatus(Iterator* iter) {
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std::string result;
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if (iter->Valid()) {
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result = iter->key().ToString() + "->" + iter->value().ToString();
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} else {
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result = "(invalid)";
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}
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return result;
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}
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};
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TEST(DBTest, Empty) {
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ASSERT_TRUE(db_ != NULL);
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ASSERT_EQ("NOT_FOUND", Get("foo"));
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}
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TEST(DBTest, ReadWrite) {
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ASSERT_OK(Put("foo", "v1"));
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ASSERT_EQ("v1", Get("foo"));
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ASSERT_OK(Put("bar", "v2"));
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ASSERT_OK(Put("foo", "v3"));
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ASSERT_EQ("v3", Get("foo"));
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ASSERT_EQ("v2", Get("bar"));
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}
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TEST(DBTest, PutDeleteGet) {
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ASSERT_OK(db_->Put(WriteOptions(), "foo", "v1"));
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ASSERT_EQ("v1", Get("foo"));
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ASSERT_OK(db_->Put(WriteOptions(), "foo", "v2"));
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ASSERT_EQ("v2", Get("foo"));
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ASSERT_OK(db_->Delete(WriteOptions(), "foo"));
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ASSERT_EQ("NOT_FOUND", Get("foo"));
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}
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TEST(DBTest, GetFromImmutableLayer) {
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Options options;
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options.env = env_;
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options.write_buffer_size = 100000; // Small write buffer
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Reopen(&options);
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ASSERT_OK(Put("foo", "v1"));
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ASSERT_EQ("v1", Get("foo"));
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env_->delay_sstable_sync_.Release_Store(env_); // Block sync calls
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Put("k1", std::string(100000, 'x')); // Fill memtable
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Put("k2", std::string(100000, 'y')); // Trigger compaction
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ASSERT_EQ("v1", Get("foo"));
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env_->delay_sstable_sync_.Release_Store(NULL); // Release sync calls
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}
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TEST(DBTest, GetFromVersions) {
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ASSERT_OK(Put("foo", "v1"));
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dbfull()->TEST_CompactMemTable();
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ASSERT_EQ("v1", Get("foo"));
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}
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TEST(DBTest, GetSnapshot) {
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// Try with both a short key and a long key
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for (int i = 0; i < 2; i++) {
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std::string key = (i == 0) ? std::string("foo") : std::string(200, 'x');
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ASSERT_OK(Put(key, "v1"));
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const Snapshot* s1 = db_->GetSnapshot();
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ASSERT_OK(Put(key, "v2"));
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ASSERT_EQ("v2", Get(key));
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ASSERT_EQ("v1", Get(key, s1));
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dbfull()->TEST_CompactMemTable();
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ASSERT_EQ("v2", Get(key));
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ASSERT_EQ("v1", Get(key, s1));
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db_->ReleaseSnapshot(s1);
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}
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}
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TEST(DBTest, GetLevel0Ordering) {
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// Check that we process level-0 files in correct order. The code
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// below generates two level-0 files where the earlier one comes
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// before the later one in the level-0 file list since the earlier
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// one has a smaller "smallest" key.
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ASSERT_OK(Put("bar", "b"));
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ASSERT_OK(Put("foo", "v1"));
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dbfull()->TEST_CompactMemTable();
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ASSERT_OK(Put("foo", "v2"));
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dbfull()->TEST_CompactMemTable();
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ASSERT_EQ("v2", Get("foo"));
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}
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TEST(DBTest, GetOrderedByLevels) {
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ASSERT_OK(Put("foo", "v1"));
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Compact("a", "z");
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ASSERT_EQ("v1", Get("foo"));
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ASSERT_OK(Put("foo", "v2"));
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ASSERT_EQ("v2", Get("foo"));
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dbfull()->TEST_CompactMemTable();
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ASSERT_EQ("v2", Get("foo"));
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}
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TEST(DBTest, GetPicksCorrectFile) {
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// Arrange to have multiple files in a non-level-0 level.
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ASSERT_OK(Put("a", "va"));
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Compact("a", "b");
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ASSERT_OK(Put("x", "vx"));
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Compact("x", "y");
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ASSERT_OK(Put("f", "vf"));
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Compact("f", "g");
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ASSERT_EQ("va", Get("a"));
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ASSERT_EQ("vf", Get("f"));
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ASSERT_EQ("vx", Get("x"));
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}
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TEST(DBTest, GetEncountersEmptyLevel) {
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// Arrange for the following to happen:
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// * sstable A in level 0
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// * nothing in level 1
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// * sstable B in level 2
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// Then do enough Get() calls to arrange for an automatic compaction
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// of sstable A. A bug would cause the compaction to be marked as
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// occuring at level 1 (instead of the correct level 0).
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// Step 1: First place sstables in levels 0 and 2
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int compaction_count = 0;
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while (NumTableFilesAtLevel(0) == 0 ||
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NumTableFilesAtLevel(2) == 0) {
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ASSERT_LE(compaction_count, 100) << "could not fill levels 0 and 2";
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compaction_count++;
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Put("a", "begin");
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Put("z", "end");
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dbfull()->TEST_CompactMemTable();
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}
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// Step 2: clear level 1 if necessary.
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dbfull()->TEST_CompactRange(1, "a", "z");
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ASSERT_EQ(NumTableFilesAtLevel(0), 1);
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ASSERT_EQ(NumTableFilesAtLevel(1), 0);
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ASSERT_EQ(NumTableFilesAtLevel(2), 1);
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// Step 3: read until level 0 compaction disappears.
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int read_count = 0;
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while (NumTableFilesAtLevel(0) > 0) {
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ASSERT_LE(read_count, 10000) << "did not trigger level 0 compaction";
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read_count++;
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ASSERT_EQ("NOT_FOUND", Get("missing"));
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}
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}
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TEST(DBTest, IterEmpty) {
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Iterator* iter = db_->NewIterator(ReadOptions());
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iter->SeekToFirst();
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ASSERT_EQ(IterStatus(iter), "(invalid)");
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iter->SeekToLast();
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ASSERT_EQ(IterStatus(iter), "(invalid)");
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iter->Seek("foo");
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ASSERT_EQ(IterStatus(iter), "(invalid)");
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delete iter;
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}
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TEST(DBTest, IterSingle) {
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ASSERT_OK(Put("a", "va"));
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Iterator* iter = db_->NewIterator(ReadOptions());
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iter->SeekToFirst();
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ASSERT_EQ(IterStatus(iter), "a->va");
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iter->Next();
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ASSERT_EQ(IterStatus(iter), "(invalid)");
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iter->SeekToFirst();
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ASSERT_EQ(IterStatus(iter), "a->va");
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iter->Prev();
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ASSERT_EQ(IterStatus(iter), "(invalid)");
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iter->SeekToLast();
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ASSERT_EQ(IterStatus(iter), "a->va");
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iter->Next();
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ASSERT_EQ(IterStatus(iter), "(invalid)");
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iter->SeekToLast();
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ASSERT_EQ(IterStatus(iter), "a->va");
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iter->Prev();
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ASSERT_EQ(IterStatus(iter), "(invalid)");
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iter->Seek("");
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ASSERT_EQ(IterStatus(iter), "a->va");
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iter->Next();
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ASSERT_EQ(IterStatus(iter), "(invalid)");
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iter->Seek("a");
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ASSERT_EQ(IterStatus(iter), "a->va");
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iter->Next();
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ASSERT_EQ(IterStatus(iter), "(invalid)");
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iter->Seek("b");
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ASSERT_EQ(IterStatus(iter), "(invalid)");
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delete iter;
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}
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TEST(DBTest, IterMulti) {
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ASSERT_OK(Put("a", "va"));
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ASSERT_OK(Put("b", "vb"));
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ASSERT_OK(Put("c", "vc"));
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Iterator* iter = db_->NewIterator(ReadOptions());
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iter->SeekToFirst();
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ASSERT_EQ(IterStatus(iter), "a->va");
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iter->Next();
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ASSERT_EQ(IterStatus(iter), "b->vb");
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iter->Next();
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ASSERT_EQ(IterStatus(iter), "c->vc");
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iter->Next();
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ASSERT_EQ(IterStatus(iter), "(invalid)");
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iter->SeekToFirst();
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ASSERT_EQ(IterStatus(iter), "a->va");
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iter->Prev();
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ASSERT_EQ(IterStatus(iter), "(invalid)");
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iter->SeekToLast();
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ASSERT_EQ(IterStatus(iter), "c->vc");
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iter->Prev();
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ASSERT_EQ(IterStatus(iter), "b->vb");
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iter->Prev();
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ASSERT_EQ(IterStatus(iter), "a->va");
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iter->Prev();
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ASSERT_EQ(IterStatus(iter), "(invalid)");
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iter->SeekToLast();
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ASSERT_EQ(IterStatus(iter), "c->vc");
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iter->Next();
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ASSERT_EQ(IterStatus(iter), "(invalid)");
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iter->Seek("");
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ASSERT_EQ(IterStatus(iter), "a->va");
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iter->Seek("a");
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ASSERT_EQ(IterStatus(iter), "a->va");
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iter->Seek("ax");
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ASSERT_EQ(IterStatus(iter), "b->vb");
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iter->Seek("b");
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ASSERT_EQ(IterStatus(iter), "b->vb");
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iter->Seek("z");
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ASSERT_EQ(IterStatus(iter), "(invalid)");
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// Switch from reverse to forward
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iter->SeekToLast();
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iter->Prev();
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iter->Prev();
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iter->Next();
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ASSERT_EQ(IterStatus(iter), "b->vb");
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// Switch from forward to reverse
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iter->SeekToFirst();
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iter->Next();
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iter->Next();
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iter->Prev();
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ASSERT_EQ(IterStatus(iter), "b->vb");
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// Make sure iter stays at snapshot
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ASSERT_OK(Put("a", "va2"));
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ASSERT_OK(Put("a2", "va3"));
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ASSERT_OK(Put("b", "vb2"));
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ASSERT_OK(Put("c", "vc2"));
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ASSERT_OK(Delete("b"));
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iter->SeekToFirst();
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ASSERT_EQ(IterStatus(iter), "a->va");
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iter->Next();
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ASSERT_EQ(IterStatus(iter), "b->vb");
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iter->Next();
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ASSERT_EQ(IterStatus(iter), "c->vc");
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iter->Next();
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ASSERT_EQ(IterStatus(iter), "(invalid)");
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iter->SeekToLast();
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ASSERT_EQ(IterStatus(iter), "c->vc");
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iter->Prev();
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ASSERT_EQ(IterStatus(iter), "b->vb");
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iter->Prev();
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ASSERT_EQ(IterStatus(iter), "a->va");
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iter->Prev();
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ASSERT_EQ(IterStatus(iter), "(invalid)");
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delete iter;
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}
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TEST(DBTest, IterSmallAndLargeMix) {
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ASSERT_OK(Put("a", "va"));
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ASSERT_OK(Put("b", std::string(100000, 'b')));
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ASSERT_OK(Put("c", "vc"));
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ASSERT_OK(Put("d", std::string(100000, 'd')));
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ASSERT_OK(Put("e", std::string(100000, 'e')));
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|
|
Iterator* iter = db_->NewIterator(ReadOptions());
|
|
|
|
iter->SeekToFirst();
|
|
ASSERT_EQ(IterStatus(iter), "a->va");
|
|
iter->Next();
|
|
ASSERT_EQ(IterStatus(iter), "b->" + std::string(100000, 'b'));
|
|
iter->Next();
|
|
ASSERT_EQ(IterStatus(iter), "c->vc");
|
|
iter->Next();
|
|
ASSERT_EQ(IterStatus(iter), "d->" + std::string(100000, 'd'));
|
|
iter->Next();
|
|
ASSERT_EQ(IterStatus(iter), "e->" + std::string(100000, 'e'));
|
|
iter->Next();
|
|
ASSERT_EQ(IterStatus(iter), "(invalid)");
|
|
|
|
iter->SeekToLast();
|
|
ASSERT_EQ(IterStatus(iter), "e->" + std::string(100000, 'e'));
|
|
iter->Prev();
|
|
ASSERT_EQ(IterStatus(iter), "d->" + std::string(100000, 'd'));
|
|
iter->Prev();
|
|
ASSERT_EQ(IterStatus(iter), "c->vc");
|
|
iter->Prev();
|
|
ASSERT_EQ(IterStatus(iter), "b->" + std::string(100000, 'b'));
|
|
iter->Prev();
|
|
ASSERT_EQ(IterStatus(iter), "a->va");
|
|
iter->Prev();
|
|
ASSERT_EQ(IterStatus(iter), "(invalid)");
|
|
|
|
delete iter;
|
|
}
|
|
|
|
TEST(DBTest, IterMultiWithDelete) {
|
|
ASSERT_OK(Put("a", "va"));
|
|
ASSERT_OK(Put("b", "vb"));
|
|
ASSERT_OK(Put("c", "vc"));
|
|
ASSERT_OK(Delete("b"));
|
|
ASSERT_EQ("NOT_FOUND", Get("b"));
|
|
|
|
Iterator* iter = db_->NewIterator(ReadOptions());
|
|
iter->Seek("c");
|
|
ASSERT_EQ(IterStatus(iter), "c->vc");
|
|
iter->Prev();
|
|
ASSERT_EQ(IterStatus(iter), "a->va");
|
|
delete iter;
|
|
}
|
|
|
|
TEST(DBTest, Recover) {
|
|
ASSERT_OK(Put("foo", "v1"));
|
|
ASSERT_OK(Put("baz", "v5"));
|
|
|
|
Reopen();
|
|
ASSERT_EQ("v1", Get("foo"));
|
|
|
|
ASSERT_EQ("v1", Get("foo"));
|
|
ASSERT_EQ("v5", Get("baz"));
|
|
ASSERT_OK(Put("bar", "v2"));
|
|
ASSERT_OK(Put("foo", "v3"));
|
|
|
|
Reopen();
|
|
ASSERT_EQ("v3", Get("foo"));
|
|
ASSERT_OK(Put("foo", "v4"));
|
|
ASSERT_EQ("v4", Get("foo"));
|
|
ASSERT_EQ("v2", Get("bar"));
|
|
ASSERT_EQ("v5", Get("baz"));
|
|
}
|
|
|
|
TEST(DBTest, RecoveryWithEmptyLog) {
|
|
ASSERT_OK(Put("foo", "v1"));
|
|
ASSERT_OK(Put("foo", "v2"));
|
|
Reopen();
|
|
Reopen();
|
|
ASSERT_OK(Put("foo", "v3"));
|
|
Reopen();
|
|
ASSERT_EQ("v3", Get("foo"));
|
|
}
|
|
|
|
// Check that writes done during a memtable compaction are recovered
|
|
// if the database is shutdown during the memtable compaction.
|
|
TEST(DBTest, RecoverDuringMemtableCompaction) {
|
|
Options options;
|
|
options.env = env_;
|
|
options.write_buffer_size = 1000000;
|
|
Reopen(&options);
|
|
|
|
// Trigger a long memtable compaction and reopen the database during it
|
|
ASSERT_OK(Put("foo", "v1")); // Goes to 1st log file
|
|
ASSERT_OK(Put("big1", std::string(10000000, 'x'))); // Fills memtable
|
|
ASSERT_OK(Put("big2", std::string(1000, 'y'))); // Triggers compaction
|
|
ASSERT_OK(Put("bar", "v2")); // Goes to new log file
|
|
|
|
Reopen(&options);
|
|
ASSERT_EQ("v1", Get("foo"));
|
|
ASSERT_EQ("v2", Get("bar"));
|
|
ASSERT_EQ(std::string(10000000, 'x'), Get("big1"));
|
|
ASSERT_EQ(std::string(1000, 'y'), Get("big2"));
|
|
}
|
|
|
|
static std::string Key(int i) {
|
|
char buf[100];
|
|
snprintf(buf, sizeof(buf), "key%06d", i);
|
|
return std::string(buf);
|
|
}
|
|
|
|
TEST(DBTest, MinorCompactionsHappen) {
|
|
Options options;
|
|
options.write_buffer_size = 10000;
|
|
Reopen(&options);
|
|
|
|
const int N = 500;
|
|
|
|
int starting_num_tables = TotalTableFiles();
|
|
for (int i = 0; i < N; i++) {
|
|
ASSERT_OK(Put(Key(i), Key(i) + std::string(1000, 'v')));
|
|
}
|
|
int ending_num_tables = TotalTableFiles();
|
|
ASSERT_GT(ending_num_tables, starting_num_tables);
|
|
|
|
for (int i = 0; i < N; i++) {
|
|
ASSERT_EQ(Key(i) + std::string(1000, 'v'), Get(Key(i)));
|
|
}
|
|
|
|
Reopen();
|
|
|
|
for (int i = 0; i < N; i++) {
|
|
ASSERT_EQ(Key(i) + std::string(1000, 'v'), Get(Key(i)));
|
|
}
|
|
}
|
|
|
|
TEST(DBTest, RecoverWithLargeLog) {
|
|
{
|
|
Options options;
|
|
Reopen(&options);
|
|
ASSERT_OK(Put("big1", std::string(200000, '1')));
|
|
ASSERT_OK(Put("big2", std::string(200000, '2')));
|
|
ASSERT_OK(Put("small3", std::string(10, '3')));
|
|
ASSERT_OK(Put("small4", std::string(10, '4')));
|
|
ASSERT_EQ(NumTableFilesAtLevel(0), 0);
|
|
}
|
|
|
|
// Make sure that if we re-open with a small write buffer size that
|
|
// we flush table files in the middle of a large log file.
|
|
Options options;
|
|
options.write_buffer_size = 100000;
|
|
Reopen(&options);
|
|
ASSERT_EQ(NumTableFilesAtLevel(0), 3);
|
|
ASSERT_EQ(std::string(200000, '1'), Get("big1"));
|
|
ASSERT_EQ(std::string(200000, '2'), Get("big2"));
|
|
ASSERT_EQ(std::string(10, '3'), Get("small3"));
|
|
ASSERT_EQ(std::string(10, '4'), Get("small4"));
|
|
ASSERT_GT(NumTableFilesAtLevel(0), 1);
|
|
}
|
|
|
|
TEST(DBTest, CompactionsGenerateMultipleFiles) {
|
|
Options options;
|
|
options.write_buffer_size = 100000000; // Large write buffer
|
|
Reopen(&options);
|
|
|
|
Random rnd(301);
|
|
|
|
// Write 8MB (80 values, each 100K)
|
|
ASSERT_EQ(NumTableFilesAtLevel(0), 0);
|
|
std::vector<std::string> values;
|
|
for (int i = 0; i < 80; i++) {
|
|
values.push_back(RandomString(&rnd, 100000));
|
|
ASSERT_OK(Put(Key(i), values[i]));
|
|
}
|
|
|
|
// Reopening moves updates to level-0
|
|
Reopen(&options);
|
|
dbfull()->TEST_CompactRange(0, "", Key(100000));
|
|
|
|
ASSERT_EQ(NumTableFilesAtLevel(0), 0);
|
|
ASSERT_GT(NumTableFilesAtLevel(1), 1);
|
|
for (int i = 0; i < 80; i++) {
|
|
ASSERT_EQ(Get(Key(i)), values[i]);
|
|
}
|
|
}
|
|
|
|
TEST(DBTest, RepeatedWritesToSameKey) {
|
|
Options options;
|
|
options.env = env_;
|
|
options.write_buffer_size = 100000; // Small write buffer
|
|
Reopen(&options);
|
|
|
|
// We must have at most one file per level except for level-0,
|
|
// which may have up to kL0_StopWritesTrigger files.
|
|
const int kMaxFiles = config::kNumLevels + config::kL0_StopWritesTrigger;
|
|
|
|
Random rnd(301);
|
|
std::string value = RandomString(&rnd, 2 * options.write_buffer_size);
|
|
for (int i = 0; i < 5 * kMaxFiles; i++) {
|
|
Put("key", value);
|
|
ASSERT_LE(TotalTableFiles(), kMaxFiles);
|
|
fprintf(stderr, "after %d: %d files\n", int(i+1), TotalTableFiles());
|
|
}
|
|
}
|
|
|
|
TEST(DBTest, SparseMerge) {
|
|
Options options;
|
|
options.compression = kNoCompression;
|
|
Reopen(&options);
|
|
|
|
FillLevels("A", "Z");
|
|
|
|
// Suppose there is:
|
|
// small amount of data with prefix A
|
|
// large amount of data with prefix B
|
|
// small amount of data with prefix C
|
|
// and that recent updates have made small changes to all three prefixes.
|
|
// Check that we do not do a compaction that merges all of B in one shot.
|
|
const std::string value(1000, 'x');
|
|
Put("A", "va");
|
|
// Write approximately 100MB of "B" values
|
|
for (int i = 0; i < 100000; i++) {
|
|
char key[100];
|
|
snprintf(key, sizeof(key), "B%010d", i);
|
|
Put(key, value);
|
|
}
|
|
Put("C", "vc");
|
|
dbfull()->TEST_CompactMemTable();
|
|
dbfull()->TEST_CompactRange(0, "A", "Z");
|
|
|
|
// Make sparse update
|
|
Put("A", "va2");
|
|
Put("B100", "bvalue2");
|
|
Put("C", "vc2");
|
|
dbfull()->TEST_CompactMemTable();
|
|
|
|
// Compactions should not cause us to create a situation where
|
|
// a file overlaps too much data at the next level.
|
|
ASSERT_LE(dbfull()->TEST_MaxNextLevelOverlappingBytes(), 20*1048576);
|
|
dbfull()->TEST_CompactRange(0, "", "z");
|
|
ASSERT_LE(dbfull()->TEST_MaxNextLevelOverlappingBytes(), 20*1048576);
|
|
dbfull()->TEST_CompactRange(1, "", "z");
|
|
ASSERT_LE(dbfull()->TEST_MaxNextLevelOverlappingBytes(), 20*1048576);
|
|
}
|
|
|
|
static bool Between(uint64_t val, uint64_t low, uint64_t high) {
|
|
bool result = (val >= low) && (val <= high);
|
|
if (!result) {
|
|
fprintf(stderr, "Value %llu is not in range [%llu, %llu]\n",
|
|
(unsigned long long)(val),
|
|
(unsigned long long)(low),
|
|
(unsigned long long)(high));
|
|
}
|
|
return result;
|
|
}
|
|
|
|
TEST(DBTest, ApproximateSizes) {
|
|
Options options;
|
|
options.write_buffer_size = 100000000; // Large write buffer
|
|
options.compression = kNoCompression;
|
|
DestroyAndReopen();
|
|
|
|
ASSERT_TRUE(Between(Size("", "xyz"), 0, 0));
|
|
Reopen(&options);
|
|
ASSERT_TRUE(Between(Size("", "xyz"), 0, 0));
|
|
|
|
// Write 8MB (80 values, each 100K)
|
|
ASSERT_EQ(NumTableFilesAtLevel(0), 0);
|
|
const int N = 80;
|
|
Random rnd(301);
|
|
for (int i = 0; i < N; i++) {
|
|
ASSERT_OK(Put(Key(i), RandomString(&rnd, 100000)));
|
|
}
|
|
|
|
// 0 because GetApproximateSizes() does not account for memtable space
|
|
ASSERT_TRUE(Between(Size("", Key(50)), 0, 0));
|
|
|
|
// Check sizes across recovery by reopening a few times
|
|
for (int run = 0; run < 3; run++) {
|
|
Reopen(&options);
|
|
|
|
for (int compact_start = 0; compact_start < N; compact_start += 10) {
|
|
for (int i = 0; i < N; i += 10) {
|
|
ASSERT_TRUE(Between(Size("", Key(i)), 100000*i, 100000*i + 10000));
|
|
ASSERT_TRUE(Between(Size("", Key(i)+".suffix"),
|
|
100000 * (i+1), 100000 * (i+1) + 10000));
|
|
ASSERT_TRUE(Between(Size(Key(i), Key(i+10)),
|
|
100000 * 10, 100000 * 10 + 10000));
|
|
}
|
|
ASSERT_TRUE(Between(Size("", Key(50)), 5000000, 5010000));
|
|
ASSERT_TRUE(Between(Size("", Key(50)+".suffix"), 5100000, 5110000));
|
|
|
|
dbfull()->TEST_CompactRange(0,
|
|
Key(compact_start),
|
|
Key(compact_start + 9));
|
|
}
|
|
|
|
ASSERT_EQ(NumTableFilesAtLevel(0), 0);
|
|
ASSERT_GT(NumTableFilesAtLevel(1), 0);
|
|
}
|
|
}
|
|
|
|
TEST(DBTest, ApproximateSizes_MixOfSmallAndLarge) {
|
|
Options options;
|
|
options.compression = kNoCompression;
|
|
Reopen();
|
|
|
|
Random rnd(301);
|
|
std::string big1 = RandomString(&rnd, 100000);
|
|
ASSERT_OK(Put(Key(0), RandomString(&rnd, 10000)));
|
|
ASSERT_OK(Put(Key(1), RandomString(&rnd, 10000)));
|
|
ASSERT_OK(Put(Key(2), big1));
|
|
ASSERT_OK(Put(Key(3), RandomString(&rnd, 10000)));
|
|
ASSERT_OK(Put(Key(4), big1));
|
|
ASSERT_OK(Put(Key(5), RandomString(&rnd, 10000)));
|
|
ASSERT_OK(Put(Key(6), RandomString(&rnd, 300000)));
|
|
ASSERT_OK(Put(Key(7), RandomString(&rnd, 10000)));
|
|
|
|
// Check sizes across recovery by reopening a few times
|
|
for (int run = 0; run < 3; run++) {
|
|
Reopen(&options);
|
|
|
|
ASSERT_TRUE(Between(Size("", Key(0)), 0, 0));
|
|
ASSERT_TRUE(Between(Size("", Key(1)), 10000, 11000));
|
|
ASSERT_TRUE(Between(Size("", Key(2)), 20000, 21000));
|
|
ASSERT_TRUE(Between(Size("", Key(3)), 120000, 121000));
|
|
ASSERT_TRUE(Between(Size("", Key(4)), 130000, 131000));
|
|
ASSERT_TRUE(Between(Size("", Key(5)), 230000, 231000));
|
|
ASSERT_TRUE(Between(Size("", Key(6)), 240000, 241000));
|
|
ASSERT_TRUE(Between(Size("", Key(7)), 540000, 541000));
|
|
ASSERT_TRUE(Between(Size("", Key(8)), 550000, 551000));
|
|
|
|
ASSERT_TRUE(Between(Size(Key(3), Key(5)), 110000, 111000));
|
|
|
|
dbfull()->TEST_CompactRange(0, Key(0), Key(100));
|
|
}
|
|
}
|
|
|
|
TEST(DBTest, IteratorPinsRef) {
|
|
Put("foo", "hello");
|
|
|
|
// Get iterator that will yield the current contents of the DB.
|
|
Iterator* iter = db_->NewIterator(ReadOptions());
|
|
|
|
// Write to force compactions
|
|
Put("foo", "newvalue1");
|
|
for (int i = 0; i < 100; i++) {
|
|
ASSERT_OK(Put(Key(i), Key(i) + std::string(100000, 'v'))); // 100K values
|
|
}
|
|
Put("foo", "newvalue2");
|
|
|
|
iter->SeekToFirst();
|
|
ASSERT_TRUE(iter->Valid());
|
|
ASSERT_EQ("foo", iter->key().ToString());
|
|
ASSERT_EQ("hello", iter->value().ToString());
|
|
iter->Next();
|
|
ASSERT_TRUE(!iter->Valid());
|
|
delete iter;
|
|
}
|
|
|
|
TEST(DBTest, Snapshot) {
|
|
Put("foo", "v1");
|
|
const Snapshot* s1 = db_->GetSnapshot();
|
|
Put("foo", "v2");
|
|
const Snapshot* s2 = db_->GetSnapshot();
|
|
Put("foo", "v3");
|
|
const Snapshot* s3 = db_->GetSnapshot();
|
|
|
|
Put("foo", "v4");
|
|
ASSERT_EQ("v1", Get("foo", s1));
|
|
ASSERT_EQ("v2", Get("foo", s2));
|
|
ASSERT_EQ("v3", Get("foo", s3));
|
|
ASSERT_EQ("v4", Get("foo"));
|
|
|
|
db_->ReleaseSnapshot(s3);
|
|
ASSERT_EQ("v1", Get("foo", s1));
|
|
ASSERT_EQ("v2", Get("foo", s2));
|
|
ASSERT_EQ("v4", Get("foo"));
|
|
|
|
db_->ReleaseSnapshot(s1);
|
|
ASSERT_EQ("v2", Get("foo", s2));
|
|
ASSERT_EQ("v4", Get("foo"));
|
|
|
|
db_->ReleaseSnapshot(s2);
|
|
ASSERT_EQ("v4", Get("foo"));
|
|
}
|
|
|
|
TEST(DBTest, HiddenValuesAreRemoved) {
|
|
Random rnd(301);
|
|
FillLevels("a", "z");
|
|
|
|
std::string big = RandomString(&rnd, 50000);
|
|
Put("foo", big);
|
|
Put("pastfoo", "v");
|
|
const Snapshot* snapshot = db_->GetSnapshot();
|
|
Put("foo", "tiny");
|
|
Put("pastfoo2", "v2"); // Advance sequence number one more
|
|
|
|
ASSERT_OK(dbfull()->TEST_CompactMemTable());
|
|
ASSERT_GT(NumTableFilesAtLevel(0), 0);
|
|
|
|
ASSERT_EQ(big, Get("foo", snapshot));
|
|
ASSERT_TRUE(Between(Size("", "pastfoo"), 50000, 60000));
|
|
db_->ReleaseSnapshot(snapshot);
|
|
ASSERT_EQ(AllEntriesFor("foo"), "[ tiny, " + big + " ]");
|
|
dbfull()->TEST_CompactRange(0, "", "x");
|
|
ASSERT_EQ(AllEntriesFor("foo"), "[ tiny ]");
|
|
ASSERT_EQ(NumTableFilesAtLevel(0), 0);
|
|
ASSERT_GE(NumTableFilesAtLevel(1), 1);
|
|
dbfull()->TEST_CompactRange(1, "", "x");
|
|
ASSERT_EQ(AllEntriesFor("foo"), "[ tiny ]");
|
|
|
|
ASSERT_TRUE(Between(Size("", "pastfoo"), 0, 1000));
|
|
}
|
|
|
|
TEST(DBTest, DeletionMarkers1) {
|
|
Put("foo", "v1");
|
|
ASSERT_OK(dbfull()->TEST_CompactMemTable());
|
|
const int last = config::kMaxMemCompactLevel;
|
|
ASSERT_EQ(NumTableFilesAtLevel(last), 1); // foo => v1 is now in last level
|
|
|
|
// Place a table at level last-1 to prevent merging with preceding mutation
|
|
Put("a", "begin");
|
|
Put("z", "end");
|
|
dbfull()->TEST_CompactMemTable();
|
|
ASSERT_EQ(NumTableFilesAtLevel(last), 1);
|
|
ASSERT_EQ(NumTableFilesAtLevel(last-1), 1);
|
|
|
|
Delete("foo");
|
|
Put("foo", "v2");
|
|
ASSERT_EQ(AllEntriesFor("foo"), "[ v2, DEL, v1 ]");
|
|
ASSERT_OK(dbfull()->TEST_CompactMemTable()); // Moves to level last-2
|
|
ASSERT_EQ(AllEntriesFor("foo"), "[ v2, DEL, v1 ]");
|
|
dbfull()->TEST_CompactRange(last-2, "", "z");
|
|
// DEL eliminated, but v1 remains because we aren't compacting that level
|
|
// (DEL can be eliminated because v2 hides v1).
|
|
ASSERT_EQ(AllEntriesFor("foo"), "[ v2, v1 ]");
|
|
dbfull()->TEST_CompactRange(last-1, "", "z");
|
|
// Merging last-1 w/ last, so we are the base level for "foo", so
|
|
// DEL is removed. (as is v1).
|
|
ASSERT_EQ(AllEntriesFor("foo"), "[ v2 ]");
|
|
}
|
|
|
|
TEST(DBTest, DeletionMarkers2) {
|
|
Put("foo", "v1");
|
|
ASSERT_OK(dbfull()->TEST_CompactMemTable());
|
|
const int last = config::kMaxMemCompactLevel;
|
|
ASSERT_EQ(NumTableFilesAtLevel(last), 1); // foo => v1 is now in last level
|
|
|
|
// Place a table at level last-1 to prevent merging with preceding mutation
|
|
Put("a", "begin");
|
|
Put("z", "end");
|
|
dbfull()->TEST_CompactMemTable();
|
|
ASSERT_EQ(NumTableFilesAtLevel(last), 1);
|
|
ASSERT_EQ(NumTableFilesAtLevel(last-1), 1);
|
|
|
|
Delete("foo");
|
|
ASSERT_EQ(AllEntriesFor("foo"), "[ DEL, v1 ]");
|
|
ASSERT_OK(dbfull()->TEST_CompactMemTable()); // Moves to level last-2
|
|
ASSERT_EQ(AllEntriesFor("foo"), "[ DEL, v1 ]");
|
|
dbfull()->TEST_CompactRange(last-2, "", "z");
|
|
// DEL kept: "last" file overlaps
|
|
ASSERT_EQ(AllEntriesFor("foo"), "[ DEL, v1 ]");
|
|
dbfull()->TEST_CompactRange(last-1, "", "z");
|
|
// Merging last-1 w/ last, so we are the base level for "foo", so
|
|
// DEL is removed. (as is v1).
|
|
ASSERT_EQ(AllEntriesFor("foo"), "[ ]");
|
|
}
|
|
|
|
TEST(DBTest, ComparatorCheck) {
|
|
class NewComparator : public Comparator {
|
|
public:
|
|
virtual const char* Name() const { return "leveldb.NewComparator"; }
|
|
virtual int Compare(const Slice& a, const Slice& b) const {
|
|
return BytewiseComparator()->Compare(a, b);
|
|
}
|
|
virtual void FindShortestSeparator(std::string* s, const Slice& l) const {
|
|
BytewiseComparator()->FindShortestSeparator(s, l);
|
|
}
|
|
virtual void FindShortSuccessor(std::string* key) const {
|
|
BytewiseComparator()->FindShortSuccessor(key);
|
|
}
|
|
};
|
|
NewComparator cmp;
|
|
Options new_options;
|
|
new_options.comparator = &cmp;
|
|
Status s = TryReopen(&new_options);
|
|
ASSERT_TRUE(!s.ok());
|
|
ASSERT_TRUE(s.ToString().find("comparator") != std::string::npos)
|
|
<< s.ToString();
|
|
}
|
|
|
|
TEST(DBTest, DBOpen_Options) {
|
|
std::string dbname = test::TmpDir() + "/db_options_test";
|
|
DestroyDB(dbname, Options());
|
|
|
|
// Does not exist, and create_if_missing == false: error
|
|
DB* db = NULL;
|
|
Options opts;
|
|
opts.create_if_missing = false;
|
|
Status s = DB::Open(opts, dbname, &db);
|
|
ASSERT_TRUE(strstr(s.ToString().c_str(), "does not exist") != NULL);
|
|
ASSERT_TRUE(db == NULL);
|
|
|
|
// Does not exist, and create_if_missing == true: OK
|
|
opts.create_if_missing = true;
|
|
s = DB::Open(opts, dbname, &db);
|
|
ASSERT_OK(s);
|
|
ASSERT_TRUE(db != NULL);
|
|
|
|
delete db;
|
|
db = NULL;
|
|
|
|
// Does exist, and error_if_exists == true: error
|
|
opts.create_if_missing = false;
|
|
opts.error_if_exists = true;
|
|
s = DB::Open(opts, dbname, &db);
|
|
ASSERT_TRUE(strstr(s.ToString().c_str(), "exists") != NULL);
|
|
ASSERT_TRUE(db == NULL);
|
|
|
|
// Does exist, and error_if_exists == false: OK
|
|
opts.create_if_missing = true;
|
|
opts.error_if_exists = false;
|
|
s = DB::Open(opts, dbname, &db);
|
|
ASSERT_OK(s);
|
|
ASSERT_TRUE(db != NULL);
|
|
|
|
delete db;
|
|
db = NULL;
|
|
}
|
|
|
|
// Multi-threaded test:
|
|
namespace {
|
|
|
|
static const int kNumThreads = 4;
|
|
static const int kTestSeconds = 10;
|
|
static const int kNumKeys = 1000;
|
|
|
|
struct MTState {
|
|
DBTest* test;
|
|
port::AtomicPointer stop;
|
|
port::AtomicPointer counter[kNumThreads];
|
|
port::AtomicPointer thread_done[kNumThreads];
|
|
};
|
|
|
|
struct MTThread {
|
|
MTState* state;
|
|
int id;
|
|
};
|
|
|
|
static void MTThreadBody(void* arg) {
|
|
MTThread* t = reinterpret_cast<MTThread*>(arg);
|
|
DB* db = t->state->test->db_;
|
|
uintptr_t counter = 0;
|
|
fprintf(stderr, "... starting thread %d\n", t->id);
|
|
Random rnd(1000 + t->id);
|
|
std::string value;
|
|
char valbuf[1500];
|
|
while (t->state->stop.Acquire_Load() == NULL) {
|
|
t->state->counter[t->id].Release_Store(reinterpret_cast<void*>(counter));
|
|
|
|
int key = rnd.Uniform(kNumKeys);
|
|
char keybuf[20];
|
|
snprintf(keybuf, sizeof(keybuf), "%016d", key);
|
|
|
|
if (rnd.OneIn(2)) {
|
|
// Write values of the form <key, my id, counter>.
|
|
// We add some padding for force compactions.
|
|
snprintf(valbuf, sizeof(valbuf), "%d.%d.%-1000d",
|
|
key, t->id, static_cast<int>(counter));
|
|
ASSERT_OK(db->Put(WriteOptions(), Slice(keybuf), Slice(valbuf)));
|
|
} else {
|
|
// Read a value and verify that it matches the pattern written above.
|
|
Status s = db->Get(ReadOptions(), Slice(keybuf), &value);
|
|
if (s.IsNotFound()) {
|
|
// Key has not yet been written
|
|
} else {
|
|
// Check that the writer thread counter is >= the counter in the value
|
|
ASSERT_OK(s);
|
|
int k, w, c;
|
|
ASSERT_EQ(3, sscanf(value.c_str(), "%d.%d.%d", &k, &w, &c)) << value;
|
|
ASSERT_EQ(k, key);
|
|
ASSERT_GE(w, 0);
|
|
ASSERT_LT(w, kNumThreads);
|
|
ASSERT_LE(c, reinterpret_cast<uintptr_t>(
|
|
t->state->counter[w].Acquire_Load()));
|
|
}
|
|
}
|
|
counter++;
|
|
}
|
|
t->state->thread_done[t->id].Release_Store(t);
|
|
fprintf(stderr, "... stopping thread %d after %d ops\n", t->id, int(counter));
|
|
}
|
|
|
|
}
|
|
|
|
TEST(DBTest, MultiThreaded) {
|
|
// Initialize state
|
|
MTState mt;
|
|
mt.test = this;
|
|
mt.stop.Release_Store(0);
|
|
for (int id = 0; id < kNumThreads; id++) {
|
|
mt.counter[id].Release_Store(0);
|
|
mt.thread_done[id].Release_Store(0);
|
|
}
|
|
|
|
// Start threads
|
|
MTThread thread[kNumThreads];
|
|
for (int id = 0; id < kNumThreads; id++) {
|
|
thread[id].state = &mt;
|
|
thread[id].id = id;
|
|
env_->StartThread(MTThreadBody, &thread[id]);
|
|
}
|
|
|
|
// Let them run for a while
|
|
env_->SleepForMicroseconds(kTestSeconds * 1000000);
|
|
|
|
// Stop the threads and wait for them to finish
|
|
mt.stop.Release_Store(&mt);
|
|
for (int id = 0; id < kNumThreads; id++) {
|
|
while (mt.thread_done[id].Acquire_Load() == NULL) {
|
|
env_->SleepForMicroseconds(100000);
|
|
}
|
|
}
|
|
}
|
|
|
|
namespace {
|
|
typedef std::map<std::string, std::string> KVMap;
|
|
}
|
|
|
|
class ModelDB: public DB {
|
|
public:
|
|
class ModelSnapshot : public Snapshot {
|
|
public:
|
|
KVMap map_;
|
|
};
|
|
|
|
explicit ModelDB(const Options& options): options_(options) { }
|
|
~ModelDB() { }
|
|
virtual Status Put(const WriteOptions& o, const Slice& k, const Slice& v) {
|
|
return DB::Put(o, k, v);
|
|
}
|
|
virtual Status Delete(const WriteOptions& o, const Slice& key) {
|
|
return DB::Delete(o, key);
|
|
}
|
|
virtual Status Get(const ReadOptions& options,
|
|
const Slice& key, std::string* value) {
|
|
assert(false); // Not implemented
|
|
return Status::NotFound(key);
|
|
}
|
|
virtual Iterator* NewIterator(const ReadOptions& options) {
|
|
if (options.snapshot == NULL) {
|
|
KVMap* saved = new KVMap;
|
|
*saved = map_;
|
|
return new ModelIter(saved, true);
|
|
} else {
|
|
const KVMap* snapshot_state =
|
|
&(reinterpret_cast<const ModelSnapshot*>(options.snapshot)->map_);
|
|
return new ModelIter(snapshot_state, false);
|
|
}
|
|
}
|
|
virtual const Snapshot* GetSnapshot() {
|
|
ModelSnapshot* snapshot = new ModelSnapshot;
|
|
snapshot->map_ = map_;
|
|
return snapshot;
|
|
}
|
|
|
|
virtual void ReleaseSnapshot(const Snapshot* snapshot) {
|
|
delete reinterpret_cast<const ModelSnapshot*>(snapshot);
|
|
}
|
|
virtual Status Write(const WriteOptions& options, WriteBatch* batch) {
|
|
assert(options.post_write_snapshot == NULL); // Not supported
|
|
class Handler : public WriteBatch::Handler {
|
|
public:
|
|
KVMap* map_;
|
|
virtual void Put(const Slice& key, const Slice& value) {
|
|
(*map_)[key.ToString()] = value.ToString();
|
|
}
|
|
virtual void Delete(const Slice& key) {
|
|
map_->erase(key.ToString());
|
|
}
|
|
};
|
|
Handler handler;
|
|
handler.map_ = &map_;
|
|
return batch->Iterate(&handler);
|
|
}
|
|
|
|
virtual bool GetProperty(const Slice& property, std::string* value) {
|
|
return false;
|
|
}
|
|
virtual void GetApproximateSizes(const Range* r, int n, uint64_t* sizes) {
|
|
for (int i = 0; i < n; i++) {
|
|
sizes[i] = 0;
|
|
}
|
|
}
|
|
private:
|
|
class ModelIter: public Iterator {
|
|
public:
|
|
ModelIter(const KVMap* map, bool owned)
|
|
: map_(map), owned_(owned), iter_(map_->end()) {
|
|
}
|
|
~ModelIter() {
|
|
if (owned_) delete map_;
|
|
}
|
|
virtual bool Valid() const { return iter_ != map_->end(); }
|
|
virtual void SeekToFirst() { iter_ = map_->begin(); }
|
|
virtual void SeekToLast() {
|
|
if (map_->empty()) {
|
|
iter_ = map_->end();
|
|
} else {
|
|
iter_ = map_->find(map_->rbegin()->first);
|
|
}
|
|
}
|
|
virtual void Seek(const Slice& k) {
|
|
iter_ = map_->lower_bound(k.ToString());
|
|
}
|
|
virtual void Next() { ++iter_; }
|
|
virtual void Prev() { --iter_; }
|
|
virtual Slice key() const { return iter_->first; }
|
|
virtual Slice value() const { return iter_->second; }
|
|
virtual Status status() const { return Status::OK(); }
|
|
private:
|
|
const KVMap* const map_;
|
|
const bool owned_; // Do we own map_
|
|
KVMap::const_iterator iter_;
|
|
};
|
|
const Options options_;
|
|
KVMap map_;
|
|
};
|
|
|
|
static std::string RandomKey(Random* rnd) {
|
|
int len = (rnd->OneIn(3)
|
|
? 1 // Short sometimes to encourage collisions
|
|
: (rnd->OneIn(100) ? rnd->Skewed(10) : rnd->Uniform(10)));
|
|
return test::RandomKey(rnd, len);
|
|
}
|
|
|
|
static bool CompareIterators(int step,
|
|
DB* model,
|
|
DB* db,
|
|
const Snapshot* model_snap,
|
|
const Snapshot* db_snap) {
|
|
ReadOptions options;
|
|
options.snapshot = model_snap;
|
|
Iterator* miter = model->NewIterator(options);
|
|
options.snapshot = db_snap;
|
|
Iterator* dbiter = db->NewIterator(options);
|
|
bool ok = true;
|
|
int count = 0;
|
|
for (miter->SeekToFirst(), dbiter->SeekToFirst();
|
|
ok && miter->Valid() && dbiter->Valid();
|
|
miter->Next(), dbiter->Next()) {
|
|
count++;
|
|
if (miter->key().compare(dbiter->key()) != 0) {
|
|
fprintf(stderr, "step %d: Key mismatch: '%s' vs. '%s'\n",
|
|
step,
|
|
EscapeString(miter->key()).c_str(),
|
|
EscapeString(dbiter->key()).c_str());
|
|
ok = false;
|
|
break;
|
|
}
|
|
|
|
if (miter->value().compare(dbiter->value()) != 0) {
|
|
fprintf(stderr, "step %d: Value mismatch for key '%s': '%s' vs. '%s'\n",
|
|
step,
|
|
EscapeString(miter->key()).c_str(),
|
|
EscapeString(miter->value()).c_str(),
|
|
EscapeString(miter->value()).c_str());
|
|
ok = false;
|
|
}
|
|
}
|
|
|
|
if (ok) {
|
|
if (miter->Valid() != dbiter->Valid()) {
|
|
fprintf(stderr, "step %d: Mismatch at end of iterators: %d vs. %d\n",
|
|
step, miter->Valid(), dbiter->Valid());
|
|
ok = false;
|
|
}
|
|
}
|
|
fprintf(stderr, "%d entries compared: ok=%d\n", count, ok);
|
|
delete miter;
|
|
delete dbiter;
|
|
return ok;
|
|
}
|
|
|
|
TEST(DBTest, Randomized) {
|
|
Random rnd(test::RandomSeed());
|
|
ModelDB model(last_options_);
|
|
const int N = 10000;
|
|
const Snapshot* model_snap = NULL;
|
|
const Snapshot* db_snap = NULL;
|
|
std::string k, v;
|
|
for (int step = 0; step < N; step++) {
|
|
if (step % 100 == 0) {
|
|
fprintf(stderr, "Step %d of %d\n", step, N);
|
|
}
|
|
int p = rnd.Uniform(100);
|
|
if (p < 45) { // Put
|
|
k = RandomKey(&rnd);
|
|
v = RandomString(&rnd,
|
|
rnd.OneIn(20)
|
|
? 100 + rnd.Uniform(100)
|
|
: rnd.Uniform(8));
|
|
ASSERT_OK(model.Put(WriteOptions(), k, v));
|
|
ASSERT_OK(db_->Put(WriteOptions(), k, v));
|
|
|
|
} else if (p < 90) { // Delete
|
|
k = RandomKey(&rnd);
|
|
ASSERT_OK(model.Delete(WriteOptions(), k));
|
|
ASSERT_OK(db_->Delete(WriteOptions(), k));
|
|
|
|
|
|
} else { // Multi-element batch
|
|
WriteBatch b;
|
|
const int num = rnd.Uniform(8);
|
|
for (int i = 0; i < num; i++) {
|
|
if (i == 0 || !rnd.OneIn(10)) {
|
|
k = RandomKey(&rnd);
|
|
} else {
|
|
// Periodically re-use the same key from the previous iter, so
|
|
// we have multiple entries in the write batch for the same key
|
|
}
|
|
if (rnd.OneIn(2)) {
|
|
v = RandomString(&rnd, rnd.Uniform(10));
|
|
b.Put(k, v);
|
|
} else {
|
|
b.Delete(k);
|
|
}
|
|
}
|
|
ASSERT_OK(model.Write(WriteOptions(), &b));
|
|
ASSERT_OK(db_->Write(WriteOptions(), &b));
|
|
}
|
|
|
|
if ((step % 100) == 0) {
|
|
ASSERT_TRUE(CompareIterators(step, &model, db_, NULL, NULL));
|
|
ASSERT_TRUE(CompareIterators(step, &model, db_, model_snap, db_snap));
|
|
// Save a snapshot from each DB this time that we'll use next
|
|
// time we compare things, to make sure the current state is
|
|
// preserved with the snapshot
|
|
if (model_snap != NULL) model.ReleaseSnapshot(model_snap);
|
|
if (db_snap != NULL) db_->ReleaseSnapshot(db_snap);
|
|
|
|
Reopen();
|
|
ASSERT_TRUE(CompareIterators(step, &model, db_, NULL, NULL));
|
|
|
|
model_snap = model.GetSnapshot();
|
|
db_snap = db_->GetSnapshot();
|
|
}
|
|
}
|
|
if (model_snap != NULL) model.ReleaseSnapshot(model_snap);
|
|
if (db_snap != NULL) db_->ReleaseSnapshot(db_snap);
|
|
}
|
|
|
|
std::string MakeKey(unsigned int num) {
|
|
char buf[30];
|
|
snprintf(buf, sizeof(buf), "%016u", num);
|
|
return std::string(buf);
|
|
}
|
|
|
|
void BM_LogAndApply(int iters, int num_base_files) {
|
|
std::string dbname = test::TmpDir() + "/leveldb_test_benchmark";
|
|
DestroyDB(dbname, Options());
|
|
|
|
DB* db = NULL;
|
|
Options opts;
|
|
opts.create_if_missing = true;
|
|
Status s = DB::Open(opts, dbname, &db);
|
|
ASSERT_OK(s);
|
|
ASSERT_TRUE(db != NULL);
|
|
|
|
delete db;
|
|
db = NULL;
|
|
|
|
Env* env = Env::Default();
|
|
|
|
port::Mutex mu;
|
|
MutexLock l(&mu);
|
|
|
|
InternalKeyComparator cmp(BytewiseComparator());
|
|
Options options;
|
|
VersionSet vset(dbname, &options, NULL, &cmp);
|
|
ASSERT_OK(vset.Recover());
|
|
VersionEdit vbase;
|
|
uint64_t fnum = 1;
|
|
for (int i = 0; i < num_base_files; i++) {
|
|
InternalKey start(MakeKey(2*fnum), 1, kTypeValue);
|
|
InternalKey limit(MakeKey(2*fnum+1), 1, kTypeDeletion);
|
|
vbase.AddFile(2, fnum++, 1 /* file size */, start, limit);
|
|
}
|
|
ASSERT_OK(vset.LogAndApply(&vbase, &mu));
|
|
|
|
uint64_t start_micros = env->NowMicros();
|
|
|
|
for (int i = 0; i < iters; i++) {
|
|
VersionEdit vedit;
|
|
vedit.DeleteFile(2, fnum);
|
|
InternalKey start(MakeKey(2*fnum), 1, kTypeValue);
|
|
InternalKey limit(MakeKey(2*fnum+1), 1, kTypeDeletion);
|
|
vedit.AddFile(2, fnum++, 1 /* file size */, start, limit);
|
|
vset.LogAndApply(&vedit, &mu);
|
|
}
|
|
uint64_t stop_micros = env->NowMicros();
|
|
unsigned int us = stop_micros - start_micros;
|
|
char buf[16];
|
|
snprintf(buf, sizeof(buf), "%d", num_base_files);
|
|
fprintf(stderr,
|
|
"BM_LogAndApply/%-6s %8d iters : %9u us (%7.0f us / iter)\n",
|
|
buf, iters, us, ((float)us) / iters);
|
|
}
|
|
|
|
}
|
|
|
|
int main(int argc, char** argv) {
|
|
if (argc > 1 && std::string(argv[1]) == "--benchmark") {
|
|
leveldb::BM_LogAndApply(1000, 1);
|
|
leveldb::BM_LogAndApply(1000, 100);
|
|
leveldb::BM_LogAndApply(1000, 10000);
|
|
leveldb::BM_LogAndApply(100, 100000);
|
|
return 0;
|
|
}
|
|
|
|
return leveldb::test::RunAllTests();
|
|
}
|