mirror of https://github.com/facebook/rocksdb.git
331 lines
11 KiB
C++
331 lines
11 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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//
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#include "util/file_reader_writer.h"
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#include <algorithm>
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#include <vector>
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#include "test_util/testharness.h"
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#include "test_util/testutil.h"
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#include "util/random.h"
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namespace rocksdb {
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class WritableFileWriterTest : public testing::Test {};
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const uint32_t kMb = 1 << 20;
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TEST_F(WritableFileWriterTest, RangeSync) {
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class FakeWF : public WritableFile {
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public:
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explicit FakeWF() : size_(0), last_synced_(0) {}
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~FakeWF() override {}
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Status Append(const Slice& data) override {
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size_ += data.size();
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return Status::OK();
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}
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Status Truncate(uint64_t /*size*/) override { return Status::OK(); }
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Status Close() override {
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EXPECT_GE(size_, last_synced_ + kMb);
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EXPECT_LT(size_, last_synced_ + 2 * kMb);
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// Make sure random writes generated enough writes.
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EXPECT_GT(size_, 10 * kMb);
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return Status::OK();
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}
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Status Flush() override { return Status::OK(); }
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Status Sync() override { return Status::OK(); }
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Status Fsync() override { return Status::OK(); }
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void SetIOPriority(Env::IOPriority /*pri*/) override {}
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uint64_t GetFileSize() override { return size_; }
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void GetPreallocationStatus(size_t* /*block_size*/,
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size_t* /*last_allocated_block*/) override {}
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size_t GetUniqueId(char* /*id*/, size_t /*max_size*/) const override {
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return 0;
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}
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Status InvalidateCache(size_t /*offset*/, size_t /*length*/) override {
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return Status::OK();
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}
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protected:
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Status Allocate(uint64_t /*offset*/, uint64_t /*len*/) override {
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return Status::OK();
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}
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Status RangeSync(uint64_t offset, uint64_t nbytes) override {
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EXPECT_EQ(offset % 4096, 0u);
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EXPECT_EQ(nbytes % 4096, 0u);
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EXPECT_EQ(offset, last_synced_);
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last_synced_ = offset + nbytes;
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EXPECT_GE(size_, last_synced_ + kMb);
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if (size_ > 2 * kMb) {
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EXPECT_LT(size_, last_synced_ + 2 * kMb);
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}
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return Status::OK();
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}
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uint64_t size_;
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uint64_t last_synced_;
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};
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EnvOptions env_options;
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env_options.bytes_per_sync = kMb;
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std::unique_ptr<FakeWF> wf(new FakeWF);
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std::unique_ptr<WritableFileWriter> writer(
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new WritableFileWriter(std::move(wf), "" /* don't care */, env_options));
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Random r(301);
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std::unique_ptr<char[]> large_buf(new char[10 * kMb]);
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for (int i = 0; i < 1000; i++) {
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int skew_limit = (i < 700) ? 10 : 15;
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uint32_t num = r.Skewed(skew_limit) * 100 + r.Uniform(100);
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writer->Append(Slice(large_buf.get(), num));
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// Flush in a chance of 1/10.
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if (r.Uniform(10) == 0) {
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writer->Flush();
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}
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}
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writer->Close();
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}
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TEST_F(WritableFileWriterTest, IncrementalBuffer) {
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class FakeWF : public WritableFile {
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public:
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explicit FakeWF(std::string* _file_data, bool _use_direct_io,
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bool _no_flush)
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: file_data_(_file_data),
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use_direct_io_(_use_direct_io),
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no_flush_(_no_flush) {}
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~FakeWF() override {}
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Status Append(const Slice& data) override {
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file_data_->append(data.data(), data.size());
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size_ += data.size();
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return Status::OK();
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}
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Status PositionedAppend(const Slice& data, uint64_t pos) override {
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EXPECT_TRUE(pos % 512 == 0);
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EXPECT_TRUE(data.size() % 512 == 0);
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file_data_->resize(pos);
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file_data_->append(data.data(), data.size());
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size_ += data.size();
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return Status::OK();
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}
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Status Truncate(uint64_t size) override {
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file_data_->resize(size);
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return Status::OK();
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}
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Status Close() override { return Status::OK(); }
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Status Flush() override { return Status::OK(); }
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Status Sync() override { return Status::OK(); }
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Status Fsync() override { return Status::OK(); }
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void SetIOPriority(Env::IOPriority /*pri*/) override {}
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uint64_t GetFileSize() override { return size_; }
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void GetPreallocationStatus(size_t* /*block_size*/,
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size_t* /*last_allocated_block*/) override {}
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size_t GetUniqueId(char* /*id*/, size_t /*max_size*/) const override {
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return 0;
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}
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Status InvalidateCache(size_t /*offset*/, size_t /*length*/) override {
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return Status::OK();
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}
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bool use_direct_io() const override { return use_direct_io_; }
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std::string* file_data_;
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bool use_direct_io_;
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bool no_flush_;
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size_t size_ = 0;
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};
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Random r(301);
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const int kNumAttempts = 50;
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for (int attempt = 0; attempt < kNumAttempts; attempt++) {
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bool no_flush = (attempt % 3 == 0);
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EnvOptions env_options;
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env_options.writable_file_max_buffer_size =
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(attempt < kNumAttempts / 2) ? 512 * 1024 : 700 * 1024;
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std::string actual;
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std::unique_ptr<FakeWF> wf(new FakeWF(&actual,
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#ifndef ROCKSDB_LITE
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attempt % 2 == 1,
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#else
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false,
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#endif
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no_flush));
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std::unique_ptr<WritableFileWriter> writer(new WritableFileWriter(
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std::move(wf), "" /* don't care */, env_options));
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std::string target;
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for (int i = 0; i < 20; i++) {
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uint32_t num = r.Skewed(16) * 100 + r.Uniform(100);
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std::string random_string;
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test::RandomString(&r, num, &random_string);
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writer->Append(Slice(random_string.c_str(), num));
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target.append(random_string.c_str(), num);
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// In some attempts, flush in a chance of 1/10.
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if (!no_flush && r.Uniform(10) == 0) {
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writer->Flush();
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}
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}
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writer->Flush();
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writer->Close();
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ASSERT_EQ(target.size(), actual.size());
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ASSERT_EQ(target, actual);
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}
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}
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#ifndef ROCKSDB_LITE
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TEST_F(WritableFileWriterTest, AppendStatusReturn) {
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class FakeWF : public WritableFile {
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public:
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explicit FakeWF() : use_direct_io_(false), io_error_(false) {}
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bool use_direct_io() const override { return use_direct_io_; }
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Status Append(const Slice& /*data*/) override {
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if (io_error_) {
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return Status::IOError("Fake IO error");
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}
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return Status::OK();
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}
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Status PositionedAppend(const Slice& /*data*/, uint64_t) override {
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if (io_error_) {
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return Status::IOError("Fake IO error");
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}
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return Status::OK();
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}
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Status Close() override { return Status::OK(); }
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Status Flush() override { return Status::OK(); }
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Status Sync() override { return Status::OK(); }
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void Setuse_direct_io(bool val) { use_direct_io_ = val; }
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void SetIOError(bool val) { io_error_ = val; }
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protected:
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bool use_direct_io_;
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bool io_error_;
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};
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std::unique_ptr<FakeWF> wf(new FakeWF());
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wf->Setuse_direct_io(true);
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std::unique_ptr<WritableFileWriter> writer(
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new WritableFileWriter(std::move(wf), "" /* don't care */, EnvOptions()));
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ASSERT_OK(writer->Append(std::string(2 * kMb, 'a')));
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// Next call to WritableFile::Append() should fail
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dynamic_cast<FakeWF*>(writer->writable_file())->SetIOError(true);
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ASSERT_NOK(writer->Append(std::string(2 * kMb, 'b')));
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}
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#endif
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class ReadaheadRandomAccessFileTest
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: public testing::Test,
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public testing::WithParamInterface<size_t> {
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public:
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static std::vector<size_t> GetReadaheadSizeList() {
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return {1lu << 12, 1lu << 16};
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}
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void SetUp() override {
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readahead_size_ = GetParam();
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scratch_.reset(new char[2 * readahead_size_]);
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ResetSourceStr();
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}
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ReadaheadRandomAccessFileTest() : control_contents_() {}
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std::string Read(uint64_t offset, size_t n) {
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Slice result;
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test_read_holder_->Read(offset, n, &result, scratch_.get());
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return std::string(result.data(), result.size());
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}
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void ResetSourceStr(const std::string& str = "") {
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auto write_holder =
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std::unique_ptr<WritableFileWriter>(test::GetWritableFileWriter(
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new test::StringSink(&control_contents_), "" /* don't care */));
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write_holder->Append(Slice(str));
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write_holder->Flush();
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auto read_holder = std::unique_ptr<RandomAccessFile>(
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new test::StringSource(control_contents_));
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test_read_holder_ =
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NewReadaheadRandomAccessFile(std::move(read_holder), readahead_size_);
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}
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size_t GetReadaheadSize() const { return readahead_size_; }
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private:
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size_t readahead_size_;
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Slice control_contents_;
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std::unique_ptr<RandomAccessFile> test_read_holder_;
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std::unique_ptr<char[]> scratch_;
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};
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TEST_P(ReadaheadRandomAccessFileTest, EmptySourceStrTest) {
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ASSERT_EQ("", Read(0, 1));
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ASSERT_EQ("", Read(0, 0));
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ASSERT_EQ("", Read(13, 13));
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}
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TEST_P(ReadaheadRandomAccessFileTest, SourceStrLenLessThanReadaheadSizeTest) {
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std::string str = "abcdefghijklmnopqrs";
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ResetSourceStr(str);
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ASSERT_EQ(str.substr(3, 4), Read(3, 4));
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ASSERT_EQ(str.substr(0, 3), Read(0, 3));
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ASSERT_EQ(str, Read(0, str.size()));
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ASSERT_EQ(str.substr(7, std::min(static_cast<int>(str.size()) - 7, 30)),
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Read(7, 30));
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ASSERT_EQ("", Read(100, 100));
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}
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TEST_P(ReadaheadRandomAccessFileTest,
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SourceStrLenCanBeGreaterThanReadaheadSizeTest) {
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Random rng(42);
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for (int k = 0; k < 100; ++k) {
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size_t strLen = k * GetReadaheadSize() +
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rng.Uniform(static_cast<int>(GetReadaheadSize()));
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std::string str =
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test::RandomHumanReadableString(&rng, static_cast<int>(strLen));
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ResetSourceStr(str);
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for (int test = 1; test <= 100; ++test) {
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size_t offset = rng.Uniform(static_cast<int>(strLen));
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size_t n = rng.Uniform(static_cast<int>(GetReadaheadSize()));
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ASSERT_EQ(str.substr(offset, std::min(n, str.size() - offset)),
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Read(offset, n));
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}
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}
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}
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TEST_P(ReadaheadRandomAccessFileTest, NExceedReadaheadTest) {
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Random rng(7);
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size_t strLen = 4 * GetReadaheadSize() +
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rng.Uniform(static_cast<int>(GetReadaheadSize()));
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std::string str =
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test::RandomHumanReadableString(&rng, static_cast<int>(strLen));
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ResetSourceStr(str);
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for (int test = 1; test <= 100; ++test) {
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size_t offset = rng.Uniform(static_cast<int>(strLen));
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size_t n =
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GetReadaheadSize() + rng.Uniform(static_cast<int>(GetReadaheadSize()));
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ASSERT_EQ(str.substr(offset, std::min(n, str.size() - offset)),
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Read(offset, n));
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}
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}
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INSTANTIATE_TEST_CASE_P(
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EmptySourceStrTest, ReadaheadRandomAccessFileTest,
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::testing::ValuesIn(ReadaheadRandomAccessFileTest::GetReadaheadSizeList()));
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INSTANTIATE_TEST_CASE_P(
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SourceStrLenLessThanReadaheadSizeTest, ReadaheadRandomAccessFileTest,
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::testing::ValuesIn(ReadaheadRandomAccessFileTest::GetReadaheadSizeList()));
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INSTANTIATE_TEST_CASE_P(
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SourceStrLenCanBeGreaterThanReadaheadSizeTest,
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ReadaheadRandomAccessFileTest,
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::testing::ValuesIn(ReadaheadRandomAccessFileTest::GetReadaheadSizeList()));
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INSTANTIATE_TEST_CASE_P(
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NExceedReadaheadTest, ReadaheadRandomAccessFileTest,
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::testing::ValuesIn(ReadaheadRandomAccessFileTest::GetReadaheadSizeList()));
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} // namespace rocksdb
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int main(int argc, char** argv) {
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::testing::InitGoogleTest(&argc, argv);
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return RUN_ALL_TESTS();
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}
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