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446 lines
15 KiB
446 lines
15 KiB
// 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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// 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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#ifdef GFLAGS
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#include "db_stress_tool/db_stress_common.h"
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namespace ROCKSDB_NAMESPACE {
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// This file defines MultiOpsTxnsStress so that we can stress test RocksDB
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// transactions on a simple, emulated relational table.
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//
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// The record format is similar to the example found at
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// https://github.com/facebook/mysql-5.6/wiki/MyRocks-record-format.
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//
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// The table is created by
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// ```
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// create table t1 (
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// a int primary key,
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// b int,
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// c int,
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// key(c),
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// )
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// ```
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//
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// (For simplicity, we use uint32_t for int here.)
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//
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// For this table, there is a primary index using `a`, as well as a secondary
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// index using `c` and `a`.
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//
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// Primary key format:
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// | index id | M(a) |
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// Primary index value:
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// | b | c |
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// M(a) represents the big-endian format of a.
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//
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// Secondary key format:
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// | index id | M(c) | M(a) |
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// Secondary index value:
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// | crc32 |
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// Similarly to M(a), M(c) is the big-endian format of c.
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//
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// The in-memory representation of a record is defined in class
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// MultiOpsTxnsStress:Record that includes a number of helper methods to
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// encode/decode primary index keys, primary index values, secondary index keys,
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// secondary index values, etc.
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//
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// Sometimes primary index and secondary index reside on different column
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// families, but sometimes they colocate in the same column family. Current
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// implementation puts them in the same (default) column family, and this is
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// subject to future change if we find it interesting to test the other case.
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//
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// Class MultiOpsTxnsStressTest has the following transactions for testing.
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//
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// 1. Primary key update
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// UPDATE t1 SET a = 3 WHERE a = 2;
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// ```
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// tx->GetForUpdate(primary key a=2)
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// tx->GetForUpdate(primary key a=3)
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// tx->Delete(primary key a=2)
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// tx->Put(primary key a=3, value)
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// tx->batch->SingleDelete(secondary key a=2)
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// tx->batch->Put(secondary key a=3, value)
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// tx->Prepare()
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// Tx->Commit()
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// ```
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//
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// 2. Secondary key update
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// UPDATE t1 SET c = 3 WHERE c = 2;
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// ```
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// iter->Seek(secondary key)
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// // Get corresponding primary key value(s) from iterator
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// tx->GetForUpdate(primary key)
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// tx->Put(primary key, value c=3)
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// tx->batch->SingleDelete(secondary key c=2)
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// tx->batch->Put(secondary key c=3)
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// tx->Prepare()
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// tx->Commit()
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// ```
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//
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// 3. Primary index value update
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// UPDATE t1 SET b = b + 1 WHERE a = 2;
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// ```
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// tx->GetForUpdate(primary key a=2)
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// tx->Put(primary key a=2, value b=b+1)
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// tx->Prepare()
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// tx->Commit()
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// ```
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//
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// 4. Point lookup
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// SELECT * FROM t1 WHERE a = 3;
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// ```
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// tx->Get(primary key a=3)
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// tx->Commit()
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// ```
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//
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// 5. Range scan
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// SELECT * FROM t1 WHERE c = 2;
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// ```
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// it = tx->GetIterator()
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// it->Seek(secondary key c=2)
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// tx->Commit()
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// ```
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class MultiOpsTxnsStressTest : public StressTest {
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public:
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class Record {
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public:
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static constexpr uint32_t kMetadataPrefix = 0;
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static constexpr uint32_t kPrimaryIndexId = 1;
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static constexpr uint32_t kSecondaryIndexId = 2;
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static constexpr size_t kPrimaryIndexEntrySize = 8 + 8;
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static constexpr size_t kSecondaryIndexEntrySize = 12 + 4;
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static_assert(kPrimaryIndexId < kSecondaryIndexId,
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"kPrimaryIndexId must be smaller than kSecondaryIndexId");
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static_assert(sizeof(kPrimaryIndexId) == sizeof(uint32_t),
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"kPrimaryIndexId must be 4 bytes");
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static_assert(sizeof(kSecondaryIndexId) == sizeof(uint32_t),
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"kSecondaryIndexId must be 4 bytes");
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// Used for generating search key to probe primary index.
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static std::string EncodePrimaryKey(uint32_t a);
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// Used for generating search prefix to probe secondary index.
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static std::string EncodeSecondaryKey(uint32_t c);
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// Used for generating search key to probe secondary index.
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static std::string EncodeSecondaryKey(uint32_t c, uint32_t a);
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static std::tuple<Status, uint32_t, uint32_t> DecodePrimaryIndexValue(
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Slice primary_index_value);
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static std::pair<Status, uint32_t> DecodeSecondaryIndexValue(
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Slice secondary_index_value);
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Record() = default;
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Record(uint32_t _a, uint32_t _b, uint32_t _c) : a_(_a), b_(_b), c_(_c) {}
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bool operator==(const Record& other) const {
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return a_ == other.a_ && b_ == other.b_ && c_ == other.c_;
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}
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bool operator!=(const Record& other) const { return !(*this == other); }
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std::pair<std::string, std::string> EncodePrimaryIndexEntry() const;
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std::string EncodePrimaryKey() const;
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std::string EncodePrimaryIndexValue() const;
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std::pair<std::string, std::string> EncodeSecondaryIndexEntry() const;
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std::string EncodeSecondaryKey() const;
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Status DecodePrimaryIndexEntry(Slice primary_index_key,
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Slice primary_index_value);
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Status DecodeSecondaryIndexEntry(Slice secondary_index_key,
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Slice secondary_index_value);
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uint32_t a_value() const { return a_; }
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uint32_t b_value() const { return b_; }
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uint32_t c_value() const { return c_; }
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void SetA(uint32_t _a) { a_ = _a; }
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void SetB(uint32_t _b) { b_ = _b; }
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void SetC(uint32_t _c) { c_ = _c; }
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std::string ToString() const {
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std::string ret("(");
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ret.append(std::to_string(a_));
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ret.append(",");
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ret.append(std::to_string(b_));
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ret.append(",");
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ret.append(std::to_string(c_));
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ret.append(")");
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return ret;
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}
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private:
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friend class InvariantChecker;
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uint32_t a_{0};
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uint32_t b_{0};
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uint32_t c_{0};
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};
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MultiOpsTxnsStressTest() {}
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~MultiOpsTxnsStressTest() override {}
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void FinishInitDb(SharedState*) override;
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void ReopenAndPreloadDbIfNeeded(SharedState* shared);
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bool IsStateTracked() const override { return false; }
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Status TestGet(ThreadState* thread, const ReadOptions& read_opts,
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const std::vector<int>& rand_column_families,
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const std::vector<int64_t>& rand_keys) override;
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std::vector<Status> TestMultiGet(
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ThreadState* thread, const ReadOptions& read_opts,
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const std::vector<int>& rand_column_families,
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const std::vector<int64_t>& rand_keys) override;
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void TestGetEntity(ThreadState* thread, const ReadOptions& read_opts,
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const std::vector<int>& rand_column_families,
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const std::vector<int64_t>& rand_keys) override;
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void TestMultiGetEntity(ThreadState* thread, const ReadOptions& read_opts,
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const std::vector<int>& rand_column_families,
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const std::vector<int64_t>& rand_keys) override;
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Status TestPrefixScan(ThreadState* thread, const ReadOptions& read_opts,
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const std::vector<int>& rand_column_families,
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const std::vector<int64_t>& rand_keys) override;
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// Given a key K, this creates an iterator which scans to K and then
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// does a random sequence of Next/Prev operations.
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Status TestIterate(ThreadState* thread, const ReadOptions& read_opts,
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const std::vector<int>& rand_column_families,
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const std::vector<int64_t>& rand_keys) override;
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Status TestPut(ThreadState* thread, WriteOptions& write_opts,
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const ReadOptions& read_opts, const std::vector<int>& cf_ids,
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const std::vector<int64_t>& keys, char (&value)[100]) override;
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Status TestDelete(ThreadState* thread, WriteOptions& write_opts,
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const std::vector<int>& rand_column_families,
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const std::vector<int64_t>& rand_keys) override;
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Status TestDeleteRange(ThreadState* thread, WriteOptions& write_opts,
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const std::vector<int>& rand_column_families,
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const std::vector<int64_t>& rand_keys) override;
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void TestIngestExternalFile(ThreadState* thread,
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const std::vector<int>& rand_column_families,
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const std::vector<int64_t>& rand_keys) override;
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void TestCompactRange(ThreadState* thread, int64_t rand_key,
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const Slice& start_key,
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ColumnFamilyHandle* column_family) override;
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Status TestBackupRestore(ThreadState* thread,
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const std::vector<int>& rand_column_families,
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const std::vector<int64_t>& rand_keys) override;
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Status TestCheckpoint(ThreadState* thread,
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const std::vector<int>& rand_column_families,
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const std::vector<int64_t>& rand_keys) override;
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Status TestApproximateSize(ThreadState* thread, uint64_t iteration,
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const std::vector<int>& rand_column_families,
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const std::vector<int64_t>& rand_keys) override;
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Status TestCustomOperations(
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ThreadState* thread,
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const std::vector<int>& rand_column_families) override;
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void RegisterAdditionalListeners() override;
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void PrepareTxnDbOptions(SharedState* /*shared*/,
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TransactionDBOptions& txn_db_opts) override;
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Status PrimaryKeyUpdateTxn(ThreadState* thread, uint32_t old_a,
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uint32_t old_a_pos, uint32_t new_a);
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Status SecondaryKeyUpdateTxn(ThreadState* thread, uint32_t old_c,
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uint32_t old_c_pos, uint32_t new_c);
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Status UpdatePrimaryIndexValueTxn(ThreadState* thread, uint32_t a,
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uint32_t b_delta);
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Status PointLookupTxn(ThreadState* thread, ReadOptions ropts, uint32_t a);
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Status RangeScanTxn(ThreadState* thread, ReadOptions ropts, uint32_t c);
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void VerifyDb(ThreadState* thread) const override;
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void ContinuouslyVerifyDb(ThreadState* thread) const override {
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VerifyDb(thread);
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}
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void VerifyPkSkFast(const ReadOptions& read_options, int job_id);
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protected:
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class Counter {
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public:
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uint64_t Next() { return value_.fetch_add(1); }
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private:
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std::atomic<uint64_t> value_ = Env::Default()->NowNanos();
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};
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using KeySet = std::set<uint32_t>;
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class KeyGenerator {
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public:
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explicit KeyGenerator(uint32_t s, uint32_t low, uint32_t high,
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KeySet&& existing_uniq, KeySet&& non_existing_uniq)
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: rand_(s),
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low_(low),
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high_(high),
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existing_uniq_(std::move(existing_uniq)),
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non_existing_uniq_(std::move(non_existing_uniq)) {}
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~KeyGenerator() {
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assert(!existing_uniq_.empty());
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assert(!non_existing_uniq_.empty());
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}
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void FinishInit();
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std::pair<uint32_t, uint32_t> ChooseExisting();
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void Replace(uint32_t old_val, uint32_t old_pos, uint32_t new_val);
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uint32_t Allocate();
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void UndoAllocation(uint32_t new_val);
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std::string ToString() const {
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std::ostringstream oss;
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oss << "[" << low_ << ", " << high_ << "): " << existing_.size()
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<< " elements, " << existing_uniq_.size() << " unique values, "
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<< non_existing_uniq_.size() << " unique non-existing values";
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return oss.str();
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}
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private:
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Random rand_;
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uint32_t low_ = 0;
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uint32_t high_ = 0;
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std::vector<uint32_t> existing_{};
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KeySet existing_uniq_{};
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KeySet non_existing_uniq_{};
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bool initialized_ = false;
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};
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// Return <a, pos>
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std::pair<uint32_t, uint32_t> ChooseExistingA(ThreadState* thread);
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uint32_t GenerateNextA(ThreadState* thread);
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// Return <c, pos>
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std::pair<uint32_t, uint32_t> ChooseExistingC(ThreadState* thread);
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uint32_t GenerateNextC(ThreadState* thread);
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// Randomly commit or rollback `txn`
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void ProcessRecoveredPreparedTxnsHelper(Transaction* txn,
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SharedState*) override;
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// Some applications, e.g. MyRocks writes a KV pair to the database via
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// commit-time-write-batch (ctwb) in additional to the transaction's regular
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// write batch. The key is usually constant representing some system
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// metadata, while the value is monoticailly increasing which represents the
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// actual value of the metadata. Method WriteToCommitTimeWriteBatch()
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// emulates this scenario.
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Status WriteToCommitTimeWriteBatch(Transaction& txn);
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Status CommitAndCreateTimestampedSnapshotIfNeeded(ThreadState* thread,
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Transaction& txn);
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void SetupSnapshot(ThreadState* thread, ReadOptions& read_opts,
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Transaction& txn,
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std::shared_ptr<const Snapshot>& snapshot);
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std::vector<std::unique_ptr<KeyGenerator>> key_gen_for_a_;
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std::vector<std::unique_ptr<KeyGenerator>> key_gen_for_c_;
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Counter counter_{};
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private:
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struct KeySpaces {
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uint32_t lb_a = 0;
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uint32_t ub_a = 0;
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uint32_t lb_c = 0;
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uint32_t ub_c = 0;
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explicit KeySpaces() = default;
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explicit KeySpaces(uint32_t _lb_a, uint32_t _ub_a, uint32_t _lb_c,
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uint32_t _ub_c)
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: lb_a(_lb_a), ub_a(_ub_a), lb_c(_lb_c), ub_c(_ub_c) {}
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std::string EncodeTo() const;
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bool DecodeFrom(Slice data);
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};
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void PersistKeySpacesDesc(const std::string& key_spaces_path, uint32_t lb_a,
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uint32_t ub_a, uint32_t lb_c, uint32_t ub_c);
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KeySpaces ReadKeySpacesDesc(const std::string& key_spaces_path);
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void PreloadDb(SharedState* shared, int threads, uint32_t lb_a, uint32_t ub_a,
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uint32_t lb_c, uint32_t ub_c);
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void ScanExistingDb(SharedState* shared, int threads);
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};
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class InvariantChecker {
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public:
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static_assert(sizeof(MultiOpsTxnsStressTest::Record().a_) == sizeof(uint32_t),
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"MultiOpsTxnsStressTest::Record::a_ must be 4 bytes");
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static_assert(sizeof(MultiOpsTxnsStressTest::Record().b_) == sizeof(uint32_t),
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"MultiOpsTxnsStressTest::Record::b_ must be 4 bytes");
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static_assert(sizeof(MultiOpsTxnsStressTest::Record().c_) == sizeof(uint32_t),
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"MultiOpsTxnsStressTest::Record::c_ must be 4 bytes");
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};
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class MultiOpsTxnsStressListener : public EventListener {
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public:
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explicit MultiOpsTxnsStressListener(MultiOpsTxnsStressTest* stress_test)
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: stress_test_(stress_test) {
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assert(stress_test_);
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}
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~MultiOpsTxnsStressListener() override {}
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void OnFlushCompleted(DB* db, const FlushJobInfo& info) override {
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assert(db);
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#ifdef NDEBUG
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(void)db;
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#endif
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assert(info.cf_id == 0);
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const ReadOptions read_options(Env::IOActivity::kFlush);
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stress_test_->VerifyPkSkFast(read_options, info.job_id);
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}
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void OnCompactionCompleted(DB* db, const CompactionJobInfo& info) override {
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assert(db);
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#ifdef NDEBUG
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(void)db;
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#endif
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assert(info.cf_id == 0);
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const ReadOptions read_options(Env::IOActivity::kCompaction);
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stress_test_->VerifyPkSkFast(read_options, info.job_id);
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}
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private:
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MultiOpsTxnsStressTest* const stress_test_ = nullptr;
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};
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} // namespace ROCKSDB_NAMESPACE
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#endif // GFLAGS
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