Du kannst nicht mehr als 25 Themen auswählen
Themen müssen entweder mit einem Buchstaben oder einer Ziffer beginnen. Sie können Bindestriche („-“) enthalten und bis zu 35 Zeichen lang sein.
835 Zeilen
24 KiB
835 Zeilen
24 KiB
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file. See the AUTHORS file for names of contributors.
|
|
|
|
#include "leveldb/table.h"
|
|
|
|
#include <map>
|
|
#include <string>
|
|
|
|
#include "db/dbformat.h"
|
|
#include "db/memtable.h"
|
|
#include "db/write_batch_internal.h"
|
|
#include "leveldb/db.h"
|
|
#include "leveldb/env.h"
|
|
#include "leveldb/iterator.h"
|
|
#include "leveldb/table_builder.h"
|
|
#include "table/block.h"
|
|
#include "table/block_builder.h"
|
|
#include "table/format.h"
|
|
#include "util/random.h"
|
|
#include "util/testharness.h"
|
|
#include "util/testutil.h"
|
|
|
|
namespace leveldb {
|
|
|
|
// Return reverse of "key".
|
|
// Used to test non-lexicographic comparators.
|
|
static std::string Reverse(const Slice& key) {
|
|
std::string str(key.ToString());
|
|
std::string rev("");
|
|
for (std::string::reverse_iterator rit = str.rbegin(); rit != str.rend();
|
|
++rit) {
|
|
rev.push_back(*rit);
|
|
}
|
|
return rev;
|
|
}
|
|
|
|
namespace {
|
|
class ReverseKeyComparator : public Comparator {
|
|
public:
|
|
const char* Name() const override {
|
|
return "leveldb.ReverseBytewiseComparator";
|
|
}
|
|
|
|
int Compare(const Slice& a, const Slice& b) const override {
|
|
return BytewiseComparator()->Compare(Reverse(a), Reverse(b));
|
|
}
|
|
|
|
void FindShortestSeparator(std::string* start,
|
|
const Slice& limit) const override {
|
|
std::string s = Reverse(*start);
|
|
std::string l = Reverse(limit);
|
|
BytewiseComparator()->FindShortestSeparator(&s, l);
|
|
*start = Reverse(s);
|
|
}
|
|
|
|
void FindShortSuccessor(std::string* key) const override {
|
|
std::string s = Reverse(*key);
|
|
BytewiseComparator()->FindShortSuccessor(&s);
|
|
*key = Reverse(s);
|
|
}
|
|
};
|
|
} // namespace
|
|
static ReverseKeyComparator reverse_key_comparator;
|
|
|
|
static void Increment(const Comparator* cmp, std::string* key) {
|
|
if (cmp == BytewiseComparator()) {
|
|
key->push_back('\0');
|
|
} else {
|
|
assert(cmp == &reverse_key_comparator);
|
|
std::string rev = Reverse(*key);
|
|
rev.push_back('\0');
|
|
*key = Reverse(rev);
|
|
}
|
|
}
|
|
|
|
// An STL comparator that uses a Comparator
|
|
namespace {
|
|
struct STLLessThan {
|
|
const Comparator* cmp;
|
|
|
|
STLLessThan() : cmp(BytewiseComparator()) {}
|
|
STLLessThan(const Comparator* c) : cmp(c) {}
|
|
bool operator()(const std::string& a, const std::string& b) const {
|
|
return cmp->Compare(Slice(a), Slice(b)) < 0;
|
|
}
|
|
};
|
|
} // namespace
|
|
|
|
class StringSink : public WritableFile {
|
|
public:
|
|
~StringSink() override = default;
|
|
|
|
const std::string& contents() const { return contents_; }
|
|
|
|
Status Close() override { return Status::OK(); }
|
|
Status Flush() override { return Status::OK(); }
|
|
Status Sync() override { return Status::OK(); }
|
|
|
|
Status Append(const Slice& data) override {
|
|
contents_.append(data.data(), data.size());
|
|
return Status::OK();
|
|
}
|
|
|
|
private:
|
|
std::string contents_;
|
|
};
|
|
|
|
class StringSource : public RandomAccessFile {
|
|
public:
|
|
StringSource(const Slice& contents)
|
|
: contents_(contents.data(), contents.size()) {}
|
|
|
|
~StringSource() override = default;
|
|
|
|
uint64_t Size() const { return contents_.size(); }
|
|
|
|
Status Read(uint64_t offset, size_t n, Slice* result,
|
|
char* scratch) const override {
|
|
if (offset >= contents_.size()) {
|
|
return Status::InvalidArgument("invalid Read offset");
|
|
}
|
|
if (offset + n > contents_.size()) {
|
|
n = contents_.size() - offset;
|
|
}
|
|
memcpy(scratch, &contents_[offset], n);
|
|
*result = Slice(scratch, n);
|
|
return Status::OK();
|
|
}
|
|
|
|
private:
|
|
std::string contents_;
|
|
};
|
|
|
|
typedef std::map<std::string, std::string, STLLessThan> KVMap;
|
|
|
|
// Helper class for tests to unify the interface between
|
|
// BlockBuilder/TableBuilder and Block/Table.
|
|
class Constructor {
|
|
public:
|
|
explicit Constructor(const Comparator* cmp) : data_(STLLessThan(cmp)) {}
|
|
virtual ~Constructor() = default;
|
|
|
|
void Add(const std::string& key, const Slice& value) {
|
|
data_[key] = value.ToString();
|
|
}
|
|
|
|
// Finish constructing the data structure with all the keys that have
|
|
// been added so far. Returns the keys in sorted order in "*keys"
|
|
// and stores the key/value pairs in "*kvmap"
|
|
void Finish(const Options& options, std::vector<std::string>* keys,
|
|
KVMap* kvmap) {
|
|
*kvmap = data_;
|
|
keys->clear();
|
|
for (const auto& kvp : data_) {
|
|
keys->push_back(kvp.first);
|
|
}
|
|
data_.clear();
|
|
Status s = FinishImpl(options, *kvmap);
|
|
ASSERT_TRUE(s.ok()) << s.ToString();
|
|
}
|
|
|
|
// Construct the data structure from the data in "data"
|
|
virtual Status FinishImpl(const Options& options, const KVMap& data) = 0;
|
|
|
|
virtual Iterator* NewIterator() const = 0;
|
|
|
|
const KVMap& data() const { return data_; }
|
|
|
|
virtual DB* db() const { return nullptr; } // Overridden in DBConstructor
|
|
|
|
private:
|
|
KVMap data_;
|
|
};
|
|
|
|
class BlockConstructor : public Constructor {
|
|
public:
|
|
explicit BlockConstructor(const Comparator* cmp)
|
|
: Constructor(cmp), comparator_(cmp), block_(nullptr) {}
|
|
~BlockConstructor() override { delete block_; }
|
|
Status FinishImpl(const Options& options, const KVMap& data) override {
|
|
delete block_;
|
|
block_ = nullptr;
|
|
BlockBuilder builder(&options);
|
|
|
|
for (const auto& kvp : data) {
|
|
builder.Add(kvp.first, kvp.second);
|
|
}
|
|
// Open the block
|
|
data_ = builder.Finish().ToString();
|
|
BlockContents contents;
|
|
contents.data = data_;
|
|
contents.cachable = false;
|
|
contents.heap_allocated = false;
|
|
block_ = new Block(contents);
|
|
return Status::OK();
|
|
}
|
|
Iterator* NewIterator() const override {
|
|
return block_->NewIterator(comparator_);
|
|
}
|
|
|
|
private:
|
|
const Comparator* const comparator_;
|
|
std::string data_;
|
|
Block* block_;
|
|
|
|
BlockConstructor();
|
|
};
|
|
|
|
class TableConstructor : public Constructor {
|
|
public:
|
|
TableConstructor(const Comparator* cmp)
|
|
: Constructor(cmp), source_(nullptr), table_(nullptr) {}
|
|
~TableConstructor() override { Reset(); }
|
|
Status FinishImpl(const Options& options, const KVMap& data) override {
|
|
Reset();
|
|
StringSink sink;
|
|
TableBuilder builder(options, &sink);
|
|
|
|
for (const auto& kvp : data) {
|
|
builder.Add(kvp.first, kvp.second);
|
|
ASSERT_TRUE(builder.status().ok());
|
|
}
|
|
Status s = builder.Finish();
|
|
ASSERT_TRUE(s.ok()) << s.ToString();
|
|
|
|
ASSERT_EQ(sink.contents().size(), builder.FileSize());
|
|
|
|
// Open the table
|
|
source_ = new StringSource(sink.contents());
|
|
Options table_options;
|
|
table_options.comparator = options.comparator;
|
|
return Table::Open(table_options, source_, sink.contents().size(), &table_);
|
|
}
|
|
|
|
Iterator* NewIterator() const override {
|
|
return table_->NewIterator(ReadOptions());
|
|
}
|
|
|
|
uint64_t ApproximateOffsetOf(const Slice& key) const {
|
|
return table_->ApproximateOffsetOf(key);
|
|
}
|
|
|
|
private:
|
|
void Reset() {
|
|
delete table_;
|
|
delete source_;
|
|
table_ = nullptr;
|
|
source_ = nullptr;
|
|
}
|
|
|
|
StringSource* source_;
|
|
Table* table_;
|
|
|
|
TableConstructor();
|
|
};
|
|
|
|
// A helper class that converts internal format keys into user keys
|
|
class KeyConvertingIterator : public Iterator {
|
|
public:
|
|
explicit KeyConvertingIterator(Iterator* iter) : iter_(iter) {}
|
|
|
|
KeyConvertingIterator(const KeyConvertingIterator&) = delete;
|
|
KeyConvertingIterator& operator=(const KeyConvertingIterator&) = delete;
|
|
|
|
~KeyConvertingIterator() override { delete iter_; }
|
|
|
|
bool Valid() const override { return iter_->Valid(); }
|
|
void Seek(const Slice& target) override {
|
|
ParsedInternalKey ikey(target, kMaxSequenceNumber, kTypeValue);
|
|
std::string encoded;
|
|
AppendInternalKey(&encoded, ikey);
|
|
iter_->Seek(encoded);
|
|
}
|
|
void SeekToFirst() override { iter_->SeekToFirst(); }
|
|
void SeekToLast() override { iter_->SeekToLast(); }
|
|
void Next() override { iter_->Next(); }
|
|
void Prev() override { iter_->Prev(); }
|
|
|
|
Slice key() const override {
|
|
assert(Valid());
|
|
ParsedInternalKey key;
|
|
if (!ParseInternalKey(iter_->key(), &key)) {
|
|
status_ = Status::Corruption("malformed internal key");
|
|
return Slice("corrupted key");
|
|
}
|
|
return key.user_key;
|
|
}
|
|
|
|
Slice value() const override { return iter_->value(); }
|
|
Status status() const override {
|
|
return status_.ok() ? iter_->status() : status_;
|
|
}
|
|
|
|
private:
|
|
mutable Status status_;
|
|
Iterator* iter_;
|
|
};
|
|
|
|
class MemTableConstructor : public Constructor {
|
|
public:
|
|
explicit MemTableConstructor(const Comparator* cmp)
|
|
: Constructor(cmp), internal_comparator_(cmp) {
|
|
memtable_ = new MemTable(internal_comparator_);
|
|
memtable_->Ref();
|
|
}
|
|
~MemTableConstructor() override { memtable_->Unref(); }
|
|
Status FinishImpl(const Options& options, const KVMap& data) override {
|
|
memtable_->Unref();
|
|
memtable_ = new MemTable(internal_comparator_);
|
|
memtable_->Ref();
|
|
int seq = 1;
|
|
for (const auto& kvp : data) {
|
|
memtable_->Add(seq, kTypeValue, kvp.first, kvp.second);
|
|
seq++;
|
|
}
|
|
return Status::OK();
|
|
}
|
|
Iterator* NewIterator() const override {
|
|
return new KeyConvertingIterator(memtable_->NewIterator());
|
|
}
|
|
|
|
private:
|
|
const InternalKeyComparator internal_comparator_;
|
|
MemTable* memtable_;
|
|
};
|
|
|
|
class DBConstructor : public Constructor {
|
|
public:
|
|
explicit DBConstructor(const Comparator* cmp)
|
|
: Constructor(cmp), comparator_(cmp) {
|
|
db_ = nullptr;
|
|
NewDB();
|
|
}
|
|
~DBConstructor() override { delete db_; }
|
|
Status FinishImpl(const Options& options, const KVMap& data) override {
|
|
delete db_;
|
|
db_ = nullptr;
|
|
NewDB();
|
|
for (const auto& kvp : data) {
|
|
WriteBatch batch;
|
|
batch.Put(kvp.first, kvp.second);
|
|
ASSERT_TRUE(db_->Write(WriteOptions(), &batch).ok());
|
|
}
|
|
return Status::OK();
|
|
}
|
|
Iterator* NewIterator() const override {
|
|
return db_->NewIterator(ReadOptions());
|
|
}
|
|
|
|
DB* db() const override { return db_; }
|
|
|
|
private:
|
|
void NewDB() {
|
|
std::string name = test::TmpDir() + "/table_testdb";
|
|
|
|
Options options;
|
|
options.comparator = comparator_;
|
|
Status status = DestroyDB(name, options);
|
|
ASSERT_TRUE(status.ok()) << status.ToString();
|
|
|
|
options.create_if_missing = true;
|
|
options.error_if_exists = true;
|
|
options.write_buffer_size = 10000; // Something small to force merging
|
|
status = DB::Open(options, name, &db_);
|
|
ASSERT_TRUE(status.ok()) << status.ToString();
|
|
}
|
|
|
|
const Comparator* const comparator_;
|
|
DB* db_;
|
|
};
|
|
|
|
enum TestType { TABLE_TEST, BLOCK_TEST, MEMTABLE_TEST, DB_TEST };
|
|
|
|
struct TestArgs {
|
|
TestType type;
|
|
bool reverse_compare;
|
|
int restart_interval;
|
|
};
|
|
|
|
static const TestArgs kTestArgList[] = {
|
|
{TABLE_TEST, false, 16},
|
|
{TABLE_TEST, false, 1},
|
|
{TABLE_TEST, false, 1024},
|
|
{TABLE_TEST, true, 16},
|
|
{TABLE_TEST, true, 1},
|
|
{TABLE_TEST, true, 1024},
|
|
|
|
{BLOCK_TEST, false, 16},
|
|
{BLOCK_TEST, false, 1},
|
|
{BLOCK_TEST, false, 1024},
|
|
{BLOCK_TEST, true, 16},
|
|
{BLOCK_TEST, true, 1},
|
|
{BLOCK_TEST, true, 1024},
|
|
|
|
// Restart interval does not matter for memtables
|
|
{MEMTABLE_TEST, false, 16},
|
|
{MEMTABLE_TEST, true, 16},
|
|
|
|
// Do not bother with restart interval variations for DB
|
|
{DB_TEST, false, 16},
|
|
{DB_TEST, true, 16},
|
|
};
|
|
static const int kNumTestArgs = sizeof(kTestArgList) / sizeof(kTestArgList[0]);
|
|
|
|
class Harness {
|
|
public:
|
|
Harness() : constructor_(nullptr) {}
|
|
|
|
void Init(const TestArgs& args) {
|
|
delete constructor_;
|
|
constructor_ = nullptr;
|
|
options_ = Options();
|
|
|
|
options_.block_restart_interval = args.restart_interval;
|
|
// Use shorter block size for tests to exercise block boundary
|
|
// conditions more.
|
|
options_.block_size = 256;
|
|
if (args.reverse_compare) {
|
|
options_.comparator = &reverse_key_comparator;
|
|
}
|
|
switch (args.type) {
|
|
case TABLE_TEST:
|
|
constructor_ = new TableConstructor(options_.comparator);
|
|
break;
|
|
case BLOCK_TEST:
|
|
constructor_ = new BlockConstructor(options_.comparator);
|
|
break;
|
|
case MEMTABLE_TEST:
|
|
constructor_ = new MemTableConstructor(options_.comparator);
|
|
break;
|
|
case DB_TEST:
|
|
constructor_ = new DBConstructor(options_.comparator);
|
|
break;
|
|
}
|
|
}
|
|
|
|
~Harness() { delete constructor_; }
|
|
|
|
void Add(const std::string& key, const std::string& value) {
|
|
constructor_->Add(key, value);
|
|
}
|
|
|
|
void Test(Random* rnd) {
|
|
std::vector<std::string> keys;
|
|
KVMap data;
|
|
constructor_->Finish(options_, &keys, &data);
|
|
|
|
TestForwardScan(keys, data);
|
|
TestBackwardScan(keys, data);
|
|
TestRandomAccess(rnd, keys, data);
|
|
}
|
|
|
|
void TestForwardScan(const std::vector<std::string>& keys,
|
|
const KVMap& data) {
|
|
Iterator* iter = constructor_->NewIterator();
|
|
ASSERT_TRUE(!iter->Valid());
|
|
iter->SeekToFirst();
|
|
for (KVMap::const_iterator model_iter = data.begin();
|
|
model_iter != data.end(); ++model_iter) {
|
|
ASSERT_EQ(ToString(data, model_iter), ToString(iter));
|
|
iter->Next();
|
|
}
|
|
ASSERT_TRUE(!iter->Valid());
|
|
delete iter;
|
|
}
|
|
|
|
void TestBackwardScan(const std::vector<std::string>& keys,
|
|
const KVMap& data) {
|
|
Iterator* iter = constructor_->NewIterator();
|
|
ASSERT_TRUE(!iter->Valid());
|
|
iter->SeekToLast();
|
|
for (KVMap::const_reverse_iterator model_iter = data.rbegin();
|
|
model_iter != data.rend(); ++model_iter) {
|
|
ASSERT_EQ(ToString(data, model_iter), ToString(iter));
|
|
iter->Prev();
|
|
}
|
|
ASSERT_TRUE(!iter->Valid());
|
|
delete iter;
|
|
}
|
|
|
|
void TestRandomAccess(Random* rnd, const std::vector<std::string>& keys,
|
|
const KVMap& data) {
|
|
static const bool kVerbose = false;
|
|
Iterator* iter = constructor_->NewIterator();
|
|
ASSERT_TRUE(!iter->Valid());
|
|
KVMap::const_iterator model_iter = data.begin();
|
|
if (kVerbose) fprintf(stderr, "---\n");
|
|
for (int i = 0; i < 200; i++) {
|
|
const int toss = rnd->Uniform(5);
|
|
switch (toss) {
|
|
case 0: {
|
|
if (iter->Valid()) {
|
|
if (kVerbose) fprintf(stderr, "Next\n");
|
|
iter->Next();
|
|
++model_iter;
|
|
ASSERT_EQ(ToString(data, model_iter), ToString(iter));
|
|
}
|
|
break;
|
|
}
|
|
|
|
case 1: {
|
|
if (kVerbose) fprintf(stderr, "SeekToFirst\n");
|
|
iter->SeekToFirst();
|
|
model_iter = data.begin();
|
|
ASSERT_EQ(ToString(data, model_iter), ToString(iter));
|
|
break;
|
|
}
|
|
|
|
case 2: {
|
|
std::string key = PickRandomKey(rnd, keys);
|
|
model_iter = data.lower_bound(key);
|
|
if (kVerbose)
|
|
fprintf(stderr, "Seek '%s'\n", EscapeString(key).c_str());
|
|
iter->Seek(Slice(key));
|
|
ASSERT_EQ(ToString(data, model_iter), ToString(iter));
|
|
break;
|
|
}
|
|
|
|
case 3: {
|
|
if (iter->Valid()) {
|
|
if (kVerbose) fprintf(stderr, "Prev\n");
|
|
iter->Prev();
|
|
if (model_iter == data.begin()) {
|
|
model_iter = data.end(); // Wrap around to invalid value
|
|
} else {
|
|
--model_iter;
|
|
}
|
|
ASSERT_EQ(ToString(data, model_iter), ToString(iter));
|
|
}
|
|
break;
|
|
}
|
|
|
|
case 4: {
|
|
if (kVerbose) fprintf(stderr, "SeekToLast\n");
|
|
iter->SeekToLast();
|
|
if (keys.empty()) {
|
|
model_iter = data.end();
|
|
} else {
|
|
std::string last = data.rbegin()->first;
|
|
model_iter = data.lower_bound(last);
|
|
}
|
|
ASSERT_EQ(ToString(data, model_iter), ToString(iter));
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
delete iter;
|
|
}
|
|
|
|
std::string ToString(const KVMap& data, const KVMap::const_iterator& it) {
|
|
if (it == data.end()) {
|
|
return "END";
|
|
} else {
|
|
return "'" + it->first + "->" + it->second + "'";
|
|
}
|
|
}
|
|
|
|
std::string ToString(const KVMap& data,
|
|
const KVMap::const_reverse_iterator& it) {
|
|
if (it == data.rend()) {
|
|
return "END";
|
|
} else {
|
|
return "'" + it->first + "->" + it->second + "'";
|
|
}
|
|
}
|
|
|
|
std::string ToString(const Iterator* it) {
|
|
if (!it->Valid()) {
|
|
return "END";
|
|
} else {
|
|
return "'" + it->key().ToString() + "->" + it->value().ToString() + "'";
|
|
}
|
|
}
|
|
|
|
std::string PickRandomKey(Random* rnd, const std::vector<std::string>& keys) {
|
|
if (keys.empty()) {
|
|
return "foo";
|
|
} else {
|
|
const int index = rnd->Uniform(keys.size());
|
|
std::string result = keys[index];
|
|
switch (rnd->Uniform(3)) {
|
|
case 0:
|
|
// Return an existing key
|
|
break;
|
|
case 1: {
|
|
// Attempt to return something smaller than an existing key
|
|
if (!result.empty() && result[result.size() - 1] > '\0') {
|
|
result[result.size() - 1]--;
|
|
}
|
|
break;
|
|
}
|
|
case 2: {
|
|
// Return something larger than an existing key
|
|
Increment(options_.comparator, &result);
|
|
break;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
}
|
|
|
|
// Returns nullptr if not running against a DB
|
|
DB* db() const { return constructor_->db(); }
|
|
|
|
private:
|
|
Options options_;
|
|
Constructor* constructor_;
|
|
};
|
|
|
|
// Test empty table/block.
|
|
TEST(Harness, Empty) {
|
|
for (int i = 0; i < kNumTestArgs; i++) {
|
|
Init(kTestArgList[i]);
|
|
Random rnd(test::RandomSeed() + 1);
|
|
Test(&rnd);
|
|
}
|
|
}
|
|
|
|
// Special test for a block with no restart entries. The C++ leveldb
|
|
// code never generates such blocks, but the Java version of leveldb
|
|
// seems to.
|
|
TEST(Harness, ZeroRestartPointsInBlock) {
|
|
char data[sizeof(uint32_t)];
|
|
memset(data, 0, sizeof(data));
|
|
BlockContents contents;
|
|
contents.data = Slice(data, sizeof(data));
|
|
contents.cachable = false;
|
|
contents.heap_allocated = false;
|
|
Block block(contents);
|
|
Iterator* iter = block.NewIterator(BytewiseComparator());
|
|
iter->SeekToFirst();
|
|
ASSERT_TRUE(!iter->Valid());
|
|
iter->SeekToLast();
|
|
ASSERT_TRUE(!iter->Valid());
|
|
iter->Seek("foo");
|
|
ASSERT_TRUE(!iter->Valid());
|
|
delete iter;
|
|
}
|
|
|
|
// Test the empty key
|
|
TEST(Harness, SimpleEmptyKey) {
|
|
for (int i = 0; i < kNumTestArgs; i++) {
|
|
Init(kTestArgList[i]);
|
|
Random rnd(test::RandomSeed() + 1);
|
|
Add("", "v");
|
|
Test(&rnd);
|
|
}
|
|
}
|
|
|
|
TEST(Harness, SimpleSingle) {
|
|
for (int i = 0; i < kNumTestArgs; i++) {
|
|
Init(kTestArgList[i]);
|
|
Random rnd(test::RandomSeed() + 2);
|
|
Add("abc", "v");
|
|
Test(&rnd);
|
|
}
|
|
}
|
|
|
|
TEST(Harness, SimpleMulti) {
|
|
for (int i = 0; i < kNumTestArgs; i++) {
|
|
Init(kTestArgList[i]);
|
|
Random rnd(test::RandomSeed() + 3);
|
|
Add("abc", "v");
|
|
Add("abcd", "v");
|
|
Add("ac", "v2");
|
|
Test(&rnd);
|
|
}
|
|
}
|
|
|
|
TEST(Harness, SimpleSpecialKey) {
|
|
for (int i = 0; i < kNumTestArgs; i++) {
|
|
Init(kTestArgList[i]);
|
|
Random rnd(test::RandomSeed() + 4);
|
|
Add("\xff\xff", "v3");
|
|
Test(&rnd);
|
|
}
|
|
}
|
|
|
|
TEST(Harness, Randomized) {
|
|
for (int i = 0; i < kNumTestArgs; i++) {
|
|
Init(kTestArgList[i]);
|
|
Random rnd(test::RandomSeed() + 5);
|
|
for (int num_entries = 0; num_entries < 2000;
|
|
num_entries += (num_entries < 50 ? 1 : 200)) {
|
|
if ((num_entries % 10) == 0) {
|
|
fprintf(stderr, "case %d of %d: num_entries = %d\n", (i + 1),
|
|
int(kNumTestArgs), num_entries);
|
|
}
|
|
for (int e = 0; e < num_entries; e++) {
|
|
std::string v;
|
|
Add(test::RandomKey(&rnd, rnd.Skewed(4)),
|
|
test::RandomString(&rnd, rnd.Skewed(5), &v).ToString());
|
|
}
|
|
Test(&rnd);
|
|
}
|
|
}
|
|
}
|
|
|
|
TEST(Harness, RandomizedLongDB) {
|
|
Random rnd(test::RandomSeed());
|
|
TestArgs args = {DB_TEST, false, 16};
|
|
Init(args);
|
|
int num_entries = 100000;
|
|
for (int e = 0; e < num_entries; e++) {
|
|
std::string v;
|
|
Add(test::RandomKey(&rnd, rnd.Skewed(4)),
|
|
test::RandomString(&rnd, rnd.Skewed(5), &v).ToString());
|
|
}
|
|
Test(&rnd);
|
|
|
|
// We must have created enough data to force merging
|
|
int files = 0;
|
|
for (int level = 0; level < config::kNumLevels; level++) {
|
|
std::string value;
|
|
char name[100];
|
|
snprintf(name, sizeof(name), "leveldb.num-files-at-level%d", level);
|
|
ASSERT_TRUE(db()->GetProperty(name, &value));
|
|
files += atoi(value.c_str());
|
|
}
|
|
ASSERT_GT(files, 0);
|
|
}
|
|
|
|
class MemTableTest {};
|
|
|
|
TEST(MemTableTest, Simple) {
|
|
InternalKeyComparator cmp(BytewiseComparator());
|
|
MemTable* memtable = new MemTable(cmp);
|
|
memtable->Ref();
|
|
WriteBatch batch;
|
|
WriteBatchInternal::SetSequence(&batch, 100);
|
|
batch.Put(std::string("k1"), std::string("v1"));
|
|
batch.Put(std::string("k2"), std::string("v2"));
|
|
batch.Put(std::string("k3"), std::string("v3"));
|
|
batch.Put(std::string("largekey"), std::string("vlarge"));
|
|
ASSERT_TRUE(WriteBatchInternal::InsertInto(&batch, memtable).ok());
|
|
|
|
Iterator* iter = memtable->NewIterator();
|
|
iter->SeekToFirst();
|
|
while (iter->Valid()) {
|
|
fprintf(stderr, "key: '%s' -> '%s'\n", iter->key().ToString().c_str(),
|
|
iter->value().ToString().c_str());
|
|
iter->Next();
|
|
}
|
|
|
|
delete iter;
|
|
memtable->Unref();
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
class TableTest {};
|
|
|
|
TEST(TableTest, ApproximateOffsetOfPlain) {
|
|
TableConstructor c(BytewiseComparator());
|
|
c.Add("k01", "hello");
|
|
c.Add("k02", "hello2");
|
|
c.Add("k03", std::string(10000, 'x'));
|
|
c.Add("k04", std::string(200000, 'x'));
|
|
c.Add("k05", std::string(300000, 'x'));
|
|
c.Add("k06", "hello3");
|
|
c.Add("k07", std::string(100000, 'x'));
|
|
std::vector<std::string> keys;
|
|
KVMap kvmap;
|
|
Options options;
|
|
options.block_size = 1024;
|
|
options.compression = kNoCompression;
|
|
c.Finish(options, &keys, &kvmap);
|
|
|
|
ASSERT_TRUE(Between(c.ApproximateOffsetOf("abc"), 0, 0));
|
|
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k01"), 0, 0));
|
|
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k01a"), 0, 0));
|
|
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k02"), 0, 0));
|
|
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k03"), 0, 0));
|
|
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k04"), 10000, 11000));
|
|
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k04a"), 210000, 211000));
|
|
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k05"), 210000, 211000));
|
|
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k06"), 510000, 511000));
|
|
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k07"), 510000, 511000));
|
|
ASSERT_TRUE(Between(c.ApproximateOffsetOf("xyz"), 610000, 612000));
|
|
}
|
|
|
|
static bool SnappyCompressionSupported() {
|
|
std::string out;
|
|
Slice in = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
|
|
return port::Snappy_Compress(in.data(), in.size(), &out);
|
|
}
|
|
|
|
TEST(TableTest, ApproximateOffsetOfCompressed) {
|
|
if (!SnappyCompressionSupported()) {
|
|
fprintf(stderr, "skipping compression tests\n");
|
|
return;
|
|
}
|
|
|
|
Random rnd(301);
|
|
TableConstructor c(BytewiseComparator());
|
|
std::string tmp;
|
|
c.Add("k01", "hello");
|
|
c.Add("k02", test::CompressibleString(&rnd, 0.25, 10000, &tmp));
|
|
c.Add("k03", "hello3");
|
|
c.Add("k04", test::CompressibleString(&rnd, 0.25, 10000, &tmp));
|
|
std::vector<std::string> keys;
|
|
KVMap kvmap;
|
|
Options options;
|
|
options.block_size = 1024;
|
|
options.compression = kSnappyCompression;
|
|
c.Finish(options, &keys, &kvmap);
|
|
|
|
// Expected upper and lower bounds of space used by compressible strings.
|
|
static const int kSlop = 1000; // Compressor effectiveness varies.
|
|
const int expected = 2500; // 10000 * compression ratio (0.25)
|
|
const int min_z = expected - kSlop;
|
|
const int max_z = expected + kSlop;
|
|
|
|
ASSERT_TRUE(Between(c.ApproximateOffsetOf("abc"), 0, kSlop));
|
|
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k01"), 0, kSlop));
|
|
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k02"), 0, kSlop));
|
|
// Have now emitted a large compressible string, so adjust expected offset.
|
|
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k03"), min_z, max_z));
|
|
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k04"), min_z, max_z));
|
|
// Have now emitted two large compressible strings, so adjust expected offset.
|
|
ASSERT_TRUE(Between(c.ApproximateOffsetOf("xyz"), 2 * min_z, 2 * max_z));
|
|
}
|
|
|
|
} // namespace leveldb
|
|
|
|
int main(int argc, char** argv) { return leveldb::test::RunAllTests(); }
|