6595267980
Summary:
Add a threshold timestamp, full_history_ts_low_ of type `std::string*` to
`CompactionIterator`, so that RocksDB can also perform garbage collection during
compaction.
* If full_history_ts_low_ is nullptr, then compaction iterator does not perform
GC, preserving all timestamp history for all keys. Compaction iterator will
treat user key with different timestamps as different user keys.
* If full_history_ts_low_ is not nullptr, then compaction iterator performs
GC. GC will look at keys older than `*full_history_ts_low_` and determine their
eligibility based on factors including snapshots.
Current rules of GC:
* If an internal key is in the same snapshot as a previous counterpart
with the same user key, and this key is eligible for GC, and the key is
not single-delete or merge operand, then this key can be dropped. Note
that the previous internal key cannot be a merge operand either.
* If a tombstone is the most recent one in the earliest snapshot and it
is eligible for GC, and keyNotExistsBeyondLevel() is true, then this
tombstone can be dropped.
* If a tombstone is the most recent one in a snapshot and it is eligible
for GC, and the compaction is at bottommost level, then all other older
internal keys of the same user key must also be eligible for GC, thus
can be dropped
* Single-delete, delete-range and merge are not currently supported.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/7556
Test Plan: make check
Reviewed By: ltamasi
Differential Revision: D24507728
Pulled By: riversand963
fbshipit-source-id: 3c09c7301f41eed76dfcf4d1527e68cf6e0a8bb3
1243 lines
48 KiB
C++
1243 lines
48 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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#include <string>
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#include <vector>
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#include "db/compaction/compaction_iterator.h"
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#include "port/port.h"
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#include "test_util/testharness.h"
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#include "test_util/testutil.h"
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#include "util/string_util.h"
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#include "utilities/merge_operators.h"
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namespace ROCKSDB_NAMESPACE {
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// Expects no merging attempts.
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class NoMergingMergeOp : public MergeOperator {
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public:
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bool FullMergeV2(const MergeOperationInput& /*merge_in*/,
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MergeOperationOutput* /*merge_out*/) const override {
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ADD_FAILURE();
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return false;
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}
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bool PartialMergeMulti(const Slice& /*key*/,
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const std::deque<Slice>& /*operand_list*/,
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std::string* /*new_value*/,
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Logger* /*logger*/) const override {
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ADD_FAILURE();
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return false;
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}
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const char* Name() const override {
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return "CompactionIteratorTest NoMergingMergeOp";
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}
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};
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// Compaction filter that gets stuck when it sees a particular key,
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// then gets unstuck when told to.
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// Always returns Decition::kRemove.
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class StallingFilter : public CompactionFilter {
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public:
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Decision FilterV2(int /*level*/, const Slice& key, ValueType /*type*/,
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const Slice& /*existing_value*/, std::string* /*new_value*/,
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std::string* /*skip_until*/) const override {
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int k = std::atoi(key.ToString().c_str());
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last_seen.store(k);
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while (k >= stall_at.load()) {
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std::this_thread::yield();
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}
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return Decision::kRemove;
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}
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const char* Name() const override {
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return "CompactionIteratorTest StallingFilter";
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}
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// Wait until the filter sees a key >= k and stalls at that key.
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// If `exact`, asserts that the seen key is equal to k.
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void WaitForStall(int k, bool exact = true) {
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stall_at.store(k);
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while (last_seen.load() < k) {
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std::this_thread::yield();
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}
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if (exact) {
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EXPECT_EQ(k, last_seen.load());
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}
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}
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// Filter will stall on key >= stall_at. Advance stall_at to unstall.
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mutable std::atomic<int> stall_at{0};
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// Last key the filter was called with.
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mutable std::atomic<int> last_seen{0};
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};
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// Compaction filter that filter out all keys.
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class FilterAllKeysCompactionFilter : public CompactionFilter {
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public:
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Decision FilterV2(int /*level*/, const Slice& /*key*/, ValueType /*type*/,
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const Slice& /*existing_value*/, std::string* /*new_value*/,
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std::string* /*skip_until*/) const override {
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return Decision::kRemove;
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}
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const char* Name() const override { return "AllKeysCompactionFilter"; }
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};
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class LoggingForwardVectorIterator : public InternalIterator {
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public:
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struct Action {
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enum class Type {
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SEEK_TO_FIRST,
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SEEK,
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NEXT,
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};
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Type type;
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std::string arg;
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explicit Action(Type _type, std::string _arg = "")
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: type(_type), arg(_arg) {}
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bool operator==(const Action& rhs) const {
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return std::tie(type, arg) == std::tie(rhs.type, rhs.arg);
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}
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};
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LoggingForwardVectorIterator(const std::vector<std::string>& keys,
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const std::vector<std::string>& values)
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: keys_(keys), values_(values), current_(keys.size()) {
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assert(keys_.size() == values_.size());
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}
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bool Valid() const override { return current_ < keys_.size(); }
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void SeekToFirst() override {
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log.emplace_back(Action::Type::SEEK_TO_FIRST);
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current_ = 0;
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}
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void SeekToLast() override { assert(false); }
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void Seek(const Slice& target) override {
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log.emplace_back(Action::Type::SEEK, target.ToString());
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current_ = std::lower_bound(keys_.begin(), keys_.end(), target.ToString()) -
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keys_.begin();
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}
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void SeekForPrev(const Slice& /*target*/) override { assert(false); }
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void Next() override {
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assert(Valid());
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log.emplace_back(Action::Type::NEXT);
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current_++;
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}
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void Prev() override { assert(false); }
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Slice key() const override {
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assert(Valid());
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return Slice(keys_[current_]);
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}
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Slice value() const override {
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assert(Valid());
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return Slice(values_[current_]);
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}
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Status status() const override { return Status::OK(); }
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std::vector<Action> log;
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private:
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std::vector<std::string> keys_;
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std::vector<std::string> values_;
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size_t current_;
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};
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class FakeCompaction : public CompactionIterator::CompactionProxy {
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public:
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FakeCompaction() = default;
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int level(size_t /*compaction_input_level*/) const override { return 0; }
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bool KeyNotExistsBeyondOutputLevel(
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const Slice& /*user_key*/,
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std::vector<size_t>* /*level_ptrs*/) const override {
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return is_bottommost_level || key_not_exists_beyond_output_level;
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}
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bool bottommost_level() const override { return is_bottommost_level; }
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int number_levels() const override { return 1; }
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Slice GetLargestUserKey() const override {
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return "\xff\xff\xff\xff\xff\xff\xff\xff\xff";
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}
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bool allow_ingest_behind() const override { return is_allow_ingest_behind; }
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bool preserve_deletes() const override { return false; }
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bool key_not_exists_beyond_output_level = false;
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bool is_bottommost_level = false;
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bool is_allow_ingest_behind = false;
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};
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// A simplifed snapshot checker which assumes each snapshot has a global
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// last visible sequence.
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class TestSnapshotChecker : public SnapshotChecker {
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public:
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explicit TestSnapshotChecker(
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SequenceNumber last_committed_sequence,
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const std::unordered_map<SequenceNumber, SequenceNumber>& snapshots = {{}})
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: last_committed_sequence_(last_committed_sequence),
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snapshots_(snapshots) {}
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SnapshotCheckerResult CheckInSnapshot(
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SequenceNumber seq, SequenceNumber snapshot_seq) const override {
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if (snapshot_seq == kMaxSequenceNumber) {
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return seq <= last_committed_sequence_
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? SnapshotCheckerResult::kInSnapshot
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: SnapshotCheckerResult::kNotInSnapshot;
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}
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assert(snapshots_.count(snapshot_seq) > 0);
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return seq <= snapshots_.at(snapshot_seq)
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? SnapshotCheckerResult::kInSnapshot
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: SnapshotCheckerResult::kNotInSnapshot;
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}
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private:
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SequenceNumber last_committed_sequence_;
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// A map of valid snapshot to last visible sequence to the snapshot.
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std::unordered_map<SequenceNumber, SequenceNumber> snapshots_;
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};
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// Test param:
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// bool: whether to pass snapshot_checker to compaction iterator.
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class CompactionIteratorTest : public testing::TestWithParam<bool> {
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public:
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CompactionIteratorTest()
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: cmp_(BytewiseComparator()), icmp_(cmp_), snapshots_({}) {}
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explicit CompactionIteratorTest(const Comparator* ucmp)
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: cmp_(ucmp), icmp_(cmp_), snapshots_({}) {}
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void InitIterators(
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const std::vector<std::string>& ks, const std::vector<std::string>& vs,
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const std::vector<std::string>& range_del_ks,
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const std::vector<std::string>& range_del_vs,
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SequenceNumber last_sequence,
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SequenceNumber last_committed_sequence = kMaxSequenceNumber,
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MergeOperator* merge_op = nullptr, CompactionFilter* filter = nullptr,
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bool bottommost_level = false,
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SequenceNumber earliest_write_conflict_snapshot = kMaxSequenceNumber,
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bool key_not_exists_beyond_output_level = false,
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const std::string* full_history_ts_low = nullptr) {
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std::unique_ptr<InternalIterator> unfragmented_range_del_iter(
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new test::VectorIterator(range_del_ks, range_del_vs));
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auto tombstone_list = std::make_shared<FragmentedRangeTombstoneList>(
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std::move(unfragmented_range_del_iter), icmp_);
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std::unique_ptr<FragmentedRangeTombstoneIterator> range_del_iter(
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new FragmentedRangeTombstoneIterator(tombstone_list, icmp_,
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kMaxSequenceNumber));
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range_del_agg_.reset(new CompactionRangeDelAggregator(&icmp_, snapshots_));
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range_del_agg_->AddTombstones(std::move(range_del_iter));
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std::unique_ptr<CompactionIterator::CompactionProxy> compaction;
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if (filter || bottommost_level || key_not_exists_beyond_output_level) {
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compaction_proxy_ = new FakeCompaction();
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compaction_proxy_->is_bottommost_level = bottommost_level;
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compaction_proxy_->is_allow_ingest_behind = AllowIngestBehind();
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compaction_proxy_->key_not_exists_beyond_output_level =
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key_not_exists_beyond_output_level;
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compaction.reset(compaction_proxy_);
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}
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bool use_snapshot_checker = UseSnapshotChecker() || GetParam();
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if (use_snapshot_checker || last_committed_sequence < kMaxSequenceNumber) {
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snapshot_checker_.reset(
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new TestSnapshotChecker(last_committed_sequence, snapshot_map_));
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}
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merge_helper_.reset(
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new MergeHelper(Env::Default(), cmp_, merge_op, filter, nullptr, false,
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0 /*latest_snapshot*/, snapshot_checker_.get(),
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0 /*level*/, nullptr /*statistics*/, &shutting_down_));
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if (c_iter_) {
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// Since iter_ is still used in ~CompactionIterator(), we call
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// ~CompactionIterator() first.
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c_iter_.reset();
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}
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iter_.reset(new LoggingForwardVectorIterator(ks, vs));
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iter_->SeekToFirst();
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c_iter_.reset(new CompactionIterator(
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iter_.get(), cmp_, merge_helper_.get(), last_sequence, &snapshots_,
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earliest_write_conflict_snapshot, snapshot_checker_.get(),
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Env::Default(), false /* report_detailed_time */, false,
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range_del_agg_.get(), nullptr /* blob_file_builder */,
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false /*allow_data_in_errors*/, std::move(compaction), filter,
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&shutting_down_, /*preserve_deletes_seqnum=*/0,
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/*manual_compaction_paused=*/nullptr, /*info_log=*/nullptr,
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full_history_ts_low));
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}
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void AddSnapshot(SequenceNumber snapshot,
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SequenceNumber last_visible_seq = kMaxSequenceNumber) {
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snapshots_.push_back(snapshot);
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snapshot_map_[snapshot] = last_visible_seq;
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}
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virtual bool UseSnapshotChecker() const { return false; }
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virtual bool AllowIngestBehind() const { return false; }
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void RunTest(
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const std::vector<std::string>& input_keys,
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const std::vector<std::string>& input_values,
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const std::vector<std::string>& expected_keys,
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const std::vector<std::string>& expected_values,
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SequenceNumber last_committed_seq = kMaxSequenceNumber,
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MergeOperator* merge_operator = nullptr,
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CompactionFilter* compaction_filter = nullptr,
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bool bottommost_level = false,
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SequenceNumber earliest_write_conflict_snapshot = kMaxSequenceNumber,
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bool key_not_exists_beyond_output_level = false,
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const std::string* full_history_ts_low = nullptr) {
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InitIterators(input_keys, input_values, {}, {}, kMaxSequenceNumber,
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last_committed_seq, merge_operator, compaction_filter,
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bottommost_level, earliest_write_conflict_snapshot,
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key_not_exists_beyond_output_level, full_history_ts_low);
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c_iter_->SeekToFirst();
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for (size_t i = 0; i < expected_keys.size(); i++) {
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std::string info = "i = " + ToString(i);
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ASSERT_TRUE(c_iter_->Valid()) << info;
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ASSERT_OK(c_iter_->status()) << info;
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ASSERT_EQ(expected_keys[i], c_iter_->key().ToString()) << info;
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ASSERT_EQ(expected_values[i], c_iter_->value().ToString()) << info;
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c_iter_->Next();
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}
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ASSERT_OK(c_iter_->status());
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ASSERT_FALSE(c_iter_->Valid());
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}
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void ClearSnapshots() {
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snapshots_.clear();
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snapshot_map_.clear();
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}
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const Comparator* cmp_;
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const InternalKeyComparator icmp_;
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std::vector<SequenceNumber> snapshots_;
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// A map of valid snapshot to last visible sequence to the snapshot.
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std::unordered_map<SequenceNumber, SequenceNumber> snapshot_map_;
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std::unique_ptr<MergeHelper> merge_helper_;
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std::unique_ptr<LoggingForwardVectorIterator> iter_;
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std::unique_ptr<CompactionIterator> c_iter_;
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std::unique_ptr<CompactionRangeDelAggregator> range_del_agg_;
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std::unique_ptr<SnapshotChecker> snapshot_checker_;
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std::atomic<bool> shutting_down_{false};
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FakeCompaction* compaction_proxy_;
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};
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// It is possible that the output of the compaction iterator is empty even if
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// the input is not.
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TEST_P(CompactionIteratorTest, EmptyResult) {
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InitIterators({test::KeyStr("a", 5, kTypeSingleDeletion),
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test::KeyStr("a", 3, kTypeValue)},
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{"", "val"}, {}, {}, 5);
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c_iter_->SeekToFirst();
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ASSERT_OK(c_iter_->status());
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ASSERT_FALSE(c_iter_->Valid());
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}
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// If there is a corruption after a single deletion, the corrupted key should
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// be preserved.
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TEST_P(CompactionIteratorTest, CorruptionAfterSingleDeletion) {
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InitIterators({test::KeyStr("a", 5, kTypeSingleDeletion),
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test::KeyStr("a", 3, kTypeValue, true),
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test::KeyStr("b", 10, kTypeValue)},
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{"", "val", "val2"}, {}, {}, 10);
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c_iter_->SeekToFirst();
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ASSERT_TRUE(c_iter_->Valid());
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ASSERT_EQ(test::KeyStr("a", 5, kTypeSingleDeletion),
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c_iter_->key().ToString());
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c_iter_->Next();
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ASSERT_TRUE(c_iter_->Valid());
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ASSERT_EQ(test::KeyStr("a", 3, kTypeValue, true), c_iter_->key().ToString());
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c_iter_->Next();
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ASSERT_TRUE(c_iter_->Valid());
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ASSERT_EQ(test::KeyStr("b", 10, kTypeValue), c_iter_->key().ToString());
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c_iter_->Next();
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ASSERT_OK(c_iter_->status());
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ASSERT_FALSE(c_iter_->Valid());
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}
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TEST_P(CompactionIteratorTest, SimpleRangeDeletion) {
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InitIterators({test::KeyStr("morning", 5, kTypeValue),
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test::KeyStr("morning", 2, kTypeValue),
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test::KeyStr("night", 3, kTypeValue)},
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{"zao", "zao", "wan"},
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{test::KeyStr("ma", 4, kTypeRangeDeletion)}, {"mz"}, 5);
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c_iter_->SeekToFirst();
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ASSERT_TRUE(c_iter_->Valid());
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ASSERT_EQ(test::KeyStr("morning", 5, kTypeValue), c_iter_->key().ToString());
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c_iter_->Next();
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ASSERT_TRUE(c_iter_->Valid());
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ASSERT_EQ(test::KeyStr("night", 3, kTypeValue), c_iter_->key().ToString());
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c_iter_->Next();
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ASSERT_OK(c_iter_->status());
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ASSERT_FALSE(c_iter_->Valid());
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}
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TEST_P(CompactionIteratorTest, RangeDeletionWithSnapshots) {
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AddSnapshot(10);
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std::vector<std::string> ks1;
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ks1.push_back(test::KeyStr("ma", 28, kTypeRangeDeletion));
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std::vector<std::string> vs1{"mz"};
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std::vector<std::string> ks2{test::KeyStr("morning", 15, kTypeValue),
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test::KeyStr("morning", 5, kTypeValue),
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test::KeyStr("night", 40, kTypeValue),
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test::KeyStr("night", 20, kTypeValue)};
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std::vector<std::string> vs2{"zao 15", "zao 5", "wan 40", "wan 20"};
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InitIterators(ks2, vs2, ks1, vs1, 40);
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c_iter_->SeekToFirst();
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ASSERT_TRUE(c_iter_->Valid());
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ASSERT_EQ(test::KeyStr("morning", 5, kTypeValue), c_iter_->key().ToString());
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c_iter_->Next();
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ASSERT_TRUE(c_iter_->Valid());
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ASSERT_EQ(test::KeyStr("night", 40, kTypeValue), c_iter_->key().ToString());
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c_iter_->Next();
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ASSERT_OK(c_iter_->status());
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ASSERT_FALSE(c_iter_->Valid());
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}
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TEST_P(CompactionIteratorTest, CompactionFilterSkipUntil) {
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class Filter : public CompactionFilter {
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Decision FilterV2(int /*level*/, const Slice& key, ValueType t,
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const Slice& existing_value, std::string* /*new_value*/,
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std::string* skip_until) const override {
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std::string k = key.ToString();
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std::string v = existing_value.ToString();
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// See InitIterators() call below for the sequence of keys and their
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// filtering decisions. Here we closely assert that compaction filter is
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// called with the expected keys and only them, and with the right values.
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if (k == "a") {
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EXPECT_EQ(ValueType::kValue, t);
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EXPECT_EQ("av50", v);
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return Decision::kKeep;
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}
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if (k == "b") {
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EXPECT_EQ(ValueType::kValue, t);
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EXPECT_EQ("bv60", v);
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*skip_until = "d+";
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return Decision::kRemoveAndSkipUntil;
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}
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if (k == "e") {
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EXPECT_EQ(ValueType::kMergeOperand, t);
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EXPECT_EQ("em71", v);
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return Decision::kKeep;
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}
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if (k == "f") {
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if (v == "fm65") {
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EXPECT_EQ(ValueType::kMergeOperand, t);
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*skip_until = "f";
|
|
} else {
|
|
EXPECT_EQ("fm30", v);
|
|
EXPECT_EQ(ValueType::kMergeOperand, t);
|
|
*skip_until = "g+";
|
|
}
|
|
return Decision::kRemoveAndSkipUntil;
|
|
}
|
|
if (k == "h") {
|
|
EXPECT_EQ(ValueType::kValue, t);
|
|
EXPECT_EQ("hv91", v);
|
|
return Decision::kKeep;
|
|
}
|
|
if (k == "i") {
|
|
EXPECT_EQ(ValueType::kMergeOperand, t);
|
|
EXPECT_EQ("im95", v);
|
|
*skip_until = "z";
|
|
return Decision::kRemoveAndSkipUntil;
|
|
}
|
|
ADD_FAILURE();
|
|
return Decision::kKeep;
|
|
}
|
|
|
|
const char* Name() const override {
|
|
return "CompactionIteratorTest.CompactionFilterSkipUntil::Filter";
|
|
}
|
|
};
|
|
|
|
NoMergingMergeOp merge_op;
|
|
Filter filter;
|
|
InitIterators(
|
|
{test::KeyStr("a", 50, kTypeValue), // keep
|
|
test::KeyStr("a", 45, kTypeMerge),
|
|
test::KeyStr("b", 60, kTypeValue), // skip to "d+"
|
|
test::KeyStr("b", 40, kTypeValue), test::KeyStr("c", 35, kTypeValue),
|
|
test::KeyStr("d", 70, kTypeMerge),
|
|
test::KeyStr("e", 71, kTypeMerge), // keep
|
|
test::KeyStr("f", 65, kTypeMerge), // skip to "f", aka keep
|
|
test::KeyStr("f", 30, kTypeMerge), // skip to "g+"
|
|
test::KeyStr("f", 25, kTypeValue), test::KeyStr("g", 90, kTypeValue),
|
|
test::KeyStr("h", 91, kTypeValue), // keep
|
|
test::KeyStr("i", 95, kTypeMerge), // skip to "z"
|
|
test::KeyStr("j", 99, kTypeValue)},
|
|
{"av50", "am45", "bv60", "bv40", "cv35", "dm70", "em71", "fm65", "fm30",
|
|
"fv25", "gv90", "hv91", "im95", "jv99"},
|
|
{}, {}, kMaxSequenceNumber, kMaxSequenceNumber, &merge_op, &filter);
|
|
|
|
// Compaction should output just "a", "e" and "h" keys.
|
|
c_iter_->SeekToFirst();
|
|
ASSERT_TRUE(c_iter_->Valid());
|
|
ASSERT_EQ(test::KeyStr("a", 50, kTypeValue), c_iter_->key().ToString());
|
|
ASSERT_EQ("av50", c_iter_->value().ToString());
|
|
c_iter_->Next();
|
|
ASSERT_TRUE(c_iter_->Valid());
|
|
ASSERT_EQ(test::KeyStr("e", 71, kTypeMerge), c_iter_->key().ToString());
|
|
ASSERT_EQ("em71", c_iter_->value().ToString());
|
|
c_iter_->Next();
|
|
ASSERT_TRUE(c_iter_->Valid());
|
|
ASSERT_EQ(test::KeyStr("h", 91, kTypeValue), c_iter_->key().ToString());
|
|
ASSERT_EQ("hv91", c_iter_->value().ToString());
|
|
c_iter_->Next();
|
|
ASSERT_OK(c_iter_->status());
|
|
ASSERT_FALSE(c_iter_->Valid());
|
|
|
|
// Check that the compaction iterator did the correct sequence of calls on
|
|
// the underlying iterator.
|
|
using A = LoggingForwardVectorIterator::Action;
|
|
using T = A::Type;
|
|
std::vector<A> expected_actions = {
|
|
A(T::SEEK_TO_FIRST),
|
|
A(T::NEXT),
|
|
A(T::NEXT),
|
|
A(T::SEEK, test::KeyStr("d+", kMaxSequenceNumber, kValueTypeForSeek)),
|
|
A(T::NEXT),
|
|
A(T::NEXT),
|
|
A(T::SEEK, test::KeyStr("g+", kMaxSequenceNumber, kValueTypeForSeek)),
|
|
A(T::NEXT),
|
|
A(T::SEEK, test::KeyStr("z", kMaxSequenceNumber, kValueTypeForSeek))};
|
|
ASSERT_EQ(expected_actions, iter_->log);
|
|
}
|
|
|
|
TEST_P(CompactionIteratorTest, ShuttingDownInFilter) {
|
|
NoMergingMergeOp merge_op;
|
|
StallingFilter filter;
|
|
InitIterators(
|
|
{test::KeyStr("1", 1, kTypeValue), test::KeyStr("2", 2, kTypeValue),
|
|
test::KeyStr("3", 3, kTypeValue), test::KeyStr("4", 4, kTypeValue)},
|
|
{"v1", "v2", "v3", "v4"}, {}, {}, kMaxSequenceNumber, kMaxSequenceNumber,
|
|
&merge_op, &filter);
|
|
// Don't leave tombstones (kTypeDeletion) for filtered keys.
|
|
compaction_proxy_->key_not_exists_beyond_output_level = true;
|
|
|
|
std::atomic<bool> seek_done{false};
|
|
ROCKSDB_NAMESPACE::port::Thread compaction_thread([&] {
|
|
c_iter_->SeekToFirst();
|
|
EXPECT_FALSE(c_iter_->Valid());
|
|
EXPECT_TRUE(c_iter_->status().IsShutdownInProgress());
|
|
seek_done.store(true);
|
|
});
|
|
|
|
// Let key 1 through.
|
|
filter.WaitForStall(1);
|
|
|
|
// Shutdown during compaction filter call for key 2.
|
|
filter.WaitForStall(2);
|
|
shutting_down_.store(true);
|
|
EXPECT_FALSE(seek_done.load());
|
|
|
|
// Unstall filter and wait for SeekToFirst() to return.
|
|
filter.stall_at.store(3);
|
|
compaction_thread.join();
|
|
assert(seek_done.load());
|
|
|
|
// Check that filter was never called again.
|
|
EXPECT_EQ(2, filter.last_seen.load());
|
|
}
|
|
|
|
// Same as ShuttingDownInFilter, but shutdown happens during filter call for
|
|
// a merge operand, not for a value.
|
|
TEST_P(CompactionIteratorTest, ShuttingDownInMerge) {
|
|
NoMergingMergeOp merge_op;
|
|
StallingFilter filter;
|
|
InitIterators(
|
|
{test::KeyStr("1", 1, kTypeValue), test::KeyStr("2", 2, kTypeMerge),
|
|
test::KeyStr("3", 3, kTypeMerge), test::KeyStr("4", 4, kTypeValue)},
|
|
{"v1", "v2", "v3", "v4"}, {}, {}, kMaxSequenceNumber, kMaxSequenceNumber,
|
|
&merge_op, &filter);
|
|
compaction_proxy_->key_not_exists_beyond_output_level = true;
|
|
|
|
std::atomic<bool> seek_done{false};
|
|
ROCKSDB_NAMESPACE::port::Thread compaction_thread([&] {
|
|
c_iter_->SeekToFirst();
|
|
ASSERT_FALSE(c_iter_->Valid());
|
|
ASSERT_TRUE(c_iter_->status().IsShutdownInProgress());
|
|
seek_done.store(true);
|
|
});
|
|
|
|
// Let key 1 through.
|
|
filter.WaitForStall(1);
|
|
|
|
// Shutdown during compaction filter call for key 2.
|
|
filter.WaitForStall(2);
|
|
shutting_down_.store(true);
|
|
EXPECT_FALSE(seek_done.load());
|
|
|
|
// Unstall filter and wait for SeekToFirst() to return.
|
|
filter.stall_at.store(3);
|
|
compaction_thread.join();
|
|
assert(seek_done.load());
|
|
|
|
// Check that filter was never called again.
|
|
EXPECT_EQ(2, filter.last_seen.load());
|
|
}
|
|
|
|
TEST_P(CompactionIteratorTest, SingleMergeOperand) {
|
|
class Filter : public CompactionFilter {
|
|
Decision FilterV2(int /*level*/, const Slice& key, ValueType t,
|
|
const Slice& existing_value, std::string* /*new_value*/,
|
|
std::string* /*skip_until*/) const override {
|
|
std::string k = key.ToString();
|
|
std::string v = existing_value.ToString();
|
|
|
|
// See InitIterators() call below for the sequence of keys and their
|
|
// filtering decisions. Here we closely assert that compaction filter is
|
|
// called with the expected keys and only them, and with the right values.
|
|
if (k == "a") {
|
|
EXPECT_EQ(ValueType::kMergeOperand, t);
|
|
EXPECT_EQ("av1", v);
|
|
return Decision::kKeep;
|
|
} else if (k == "b") {
|
|
EXPECT_EQ(ValueType::kMergeOperand, t);
|
|
return Decision::kKeep;
|
|
} else if (k == "c") {
|
|
return Decision::kKeep;
|
|
}
|
|
|
|
ADD_FAILURE();
|
|
return Decision::kKeep;
|
|
}
|
|
|
|
const char* Name() const override {
|
|
return "CompactionIteratorTest.SingleMergeOperand::Filter";
|
|
}
|
|
};
|
|
|
|
class SingleMergeOp : public MergeOperator {
|
|
public:
|
|
bool FullMergeV2(const MergeOperationInput& merge_in,
|
|
MergeOperationOutput* merge_out) const override {
|
|
// See InitIterators() call below for why "c" is the only key for which
|
|
// FullMergeV2 should be called.
|
|
EXPECT_EQ("c", merge_in.key.ToString());
|
|
|
|
std::string temp_value;
|
|
if (merge_in.existing_value != nullptr) {
|
|
temp_value = merge_in.existing_value->ToString();
|
|
}
|
|
|
|
for (auto& operand : merge_in.operand_list) {
|
|
temp_value.append(operand.ToString());
|
|
}
|
|
merge_out->new_value = temp_value;
|
|
|
|
return true;
|
|
}
|
|
|
|
bool PartialMergeMulti(const Slice& key,
|
|
const std::deque<Slice>& operand_list,
|
|
std::string* new_value,
|
|
Logger* /*logger*/) const override {
|
|
std::string string_key = key.ToString();
|
|
EXPECT_TRUE(string_key == "a" || string_key == "b");
|
|
|
|
if (string_key == "a") {
|
|
EXPECT_EQ(1, operand_list.size());
|
|
} else if (string_key == "b") {
|
|
EXPECT_EQ(2, operand_list.size());
|
|
}
|
|
|
|
std::string temp_value;
|
|
for (auto& operand : operand_list) {
|
|
temp_value.append(operand.ToString());
|
|
}
|
|
swap(temp_value, *new_value);
|
|
|
|
return true;
|
|
}
|
|
|
|
const char* Name() const override {
|
|
return "CompactionIteratorTest SingleMergeOp";
|
|
}
|
|
|
|
bool AllowSingleOperand() const override { return true; }
|
|
};
|
|
|
|
SingleMergeOp merge_op;
|
|
Filter filter;
|
|
InitIterators(
|
|
// a should invoke PartialMergeMulti with a single merge operand.
|
|
{test::KeyStr("a", 50, kTypeMerge),
|
|
// b should invoke PartialMergeMulti with two operands.
|
|
test::KeyStr("b", 70, kTypeMerge), test::KeyStr("b", 60, kTypeMerge),
|
|
// c should invoke FullMerge due to kTypeValue at the beginning.
|
|
test::KeyStr("c", 90, kTypeMerge), test::KeyStr("c", 80, kTypeValue)},
|
|
{"av1", "bv2", "bv1", "cv2", "cv1"}, {}, {}, kMaxSequenceNumber,
|
|
kMaxSequenceNumber, &merge_op, &filter);
|
|
|
|
c_iter_->SeekToFirst();
|
|
ASSERT_TRUE(c_iter_->Valid());
|
|
ASSERT_EQ(test::KeyStr("a", 50, kTypeMerge), c_iter_->key().ToString());
|
|
ASSERT_EQ("av1", c_iter_->value().ToString());
|
|
c_iter_->Next();
|
|
ASSERT_TRUE(c_iter_->Valid());
|
|
ASSERT_EQ("bv1bv2", c_iter_->value().ToString());
|
|
c_iter_->Next();
|
|
ASSERT_OK(c_iter_->status());
|
|
ASSERT_EQ("cv1cv2", c_iter_->value().ToString());
|
|
}
|
|
|
|
// In bottommost level, values earlier than earliest snapshot can be output
|
|
// with sequence = 0.
|
|
TEST_P(CompactionIteratorTest, ZeroOutSequenceAtBottomLevel) {
|
|
AddSnapshot(1);
|
|
RunTest({test::KeyStr("a", 1, kTypeValue), test::KeyStr("b", 2, kTypeValue)},
|
|
{"v1", "v2"},
|
|
{test::KeyStr("a", 0, kTypeValue), test::KeyStr("b", 2, kTypeValue)},
|
|
{"v1", "v2"}, kMaxSequenceNumber /*last_commited_seq*/,
|
|
nullptr /*merge_operator*/, nullptr /*compaction_filter*/,
|
|
true /*bottommost_level*/);
|
|
}
|
|
|
|
// In bottommost level, deletions earlier than earliest snapshot can be removed
|
|
// permanently.
|
|
TEST_P(CompactionIteratorTest, RemoveDeletionAtBottomLevel) {
|
|
AddSnapshot(1);
|
|
RunTest({test::KeyStr("a", 1, kTypeDeletion),
|
|
test::KeyStr("b", 3, kTypeDeletion),
|
|
test::KeyStr("b", 1, kTypeValue)},
|
|
{"", "", ""},
|
|
{test::KeyStr("b", 3, kTypeDeletion),
|
|
test::KeyStr("b", 0, kTypeValue)},
|
|
{"", ""},
|
|
kMaxSequenceNumber /*last_commited_seq*/, nullptr /*merge_operator*/,
|
|
nullptr /*compaction_filter*/, true /*bottommost_level*/);
|
|
}
|
|
|
|
// In bottommost level, single deletions earlier than earliest snapshot can be
|
|
// removed permanently.
|
|
TEST_P(CompactionIteratorTest, RemoveSingleDeletionAtBottomLevel) {
|
|
AddSnapshot(1);
|
|
RunTest({test::KeyStr("a", 1, kTypeSingleDeletion),
|
|
test::KeyStr("b", 2, kTypeSingleDeletion)},
|
|
{"", ""}, {test::KeyStr("b", 2, kTypeSingleDeletion)}, {""},
|
|
kMaxSequenceNumber /*last_commited_seq*/, nullptr /*merge_operator*/,
|
|
nullptr /*compaction_filter*/, true /*bottommost_level*/);
|
|
}
|
|
|
|
TEST_P(CompactionIteratorTest, ConvertToPutAtBottom) {
|
|
std::shared_ptr<MergeOperator> merge_op =
|
|
MergeOperators::CreateStringAppendOperator();
|
|
RunTest({test::KeyStr("a", 4, kTypeMerge), test::KeyStr("a", 3, kTypeMerge),
|
|
test::KeyStr("a", 2, kTypeMerge), test::KeyStr("b", 1, kTypeValue)},
|
|
{"a4", "a3", "a2", "b1"},
|
|
{test::KeyStr("a", 0, kTypeValue), test::KeyStr("b", 0, kTypeValue)},
|
|
{"a2,a3,a4", "b1"}, kMaxSequenceNumber /*last_committed_seq*/,
|
|
merge_op.get(), nullptr /*compaction_filter*/,
|
|
true /*bottomost_level*/);
|
|
}
|
|
|
|
INSTANTIATE_TEST_CASE_P(CompactionIteratorTestInstance, CompactionIteratorTest,
|
|
testing::Values(true, false));
|
|
|
|
// Tests how CompactionIterator work together with SnapshotChecker.
|
|
class CompactionIteratorWithSnapshotCheckerTest
|
|
: public CompactionIteratorTest {
|
|
public:
|
|
bool UseSnapshotChecker() const override { return true; }
|
|
};
|
|
|
|
// Uncommitted keys (keys with seq > last_committed_seq) should be output as-is
|
|
// while committed version of these keys should get compacted as usual.
|
|
|
|
TEST_F(CompactionIteratorWithSnapshotCheckerTest,
|
|
PreserveUncommittedKeys_Value) {
|
|
RunTest(
|
|
{test::KeyStr("foo", 3, kTypeValue), test::KeyStr("foo", 2, kTypeValue),
|
|
test::KeyStr("foo", 1, kTypeValue)},
|
|
{"v3", "v2", "v1"},
|
|
{test::KeyStr("foo", 3, kTypeValue), test::KeyStr("foo", 2, kTypeValue)},
|
|
{"v3", "v2"}, 2 /*last_committed_seq*/);
|
|
}
|
|
|
|
TEST_F(CompactionIteratorWithSnapshotCheckerTest,
|
|
PreserveUncommittedKeys_Deletion) {
|
|
RunTest({test::KeyStr("foo", 2, kTypeDeletion),
|
|
test::KeyStr("foo", 1, kTypeValue)},
|
|
{"", "v1"},
|
|
{test::KeyStr("foo", 2, kTypeDeletion),
|
|
test::KeyStr("foo", 1, kTypeValue)},
|
|
{"", "v1"}, 1 /*last_committed_seq*/);
|
|
}
|
|
|
|
TEST_F(CompactionIteratorWithSnapshotCheckerTest,
|
|
PreserveUncommittedKeys_Merge) {
|
|
auto merge_op = MergeOperators::CreateStringAppendOperator();
|
|
RunTest(
|
|
{test::KeyStr("foo", 3, kTypeMerge), test::KeyStr("foo", 2, kTypeMerge),
|
|
test::KeyStr("foo", 1, kTypeValue)},
|
|
{"v3", "v2", "v1"},
|
|
{test::KeyStr("foo", 3, kTypeMerge), test::KeyStr("foo", 2, kTypeValue)},
|
|
{"v3", "v1,v2"}, 2 /*last_committed_seq*/, merge_op.get());
|
|
}
|
|
|
|
TEST_F(CompactionIteratorWithSnapshotCheckerTest,
|
|
PreserveUncommittedKeys_SingleDelete) {
|
|
RunTest({test::KeyStr("foo", 2, kTypeSingleDeletion),
|
|
test::KeyStr("foo", 1, kTypeValue)},
|
|
{"", "v1"},
|
|
{test::KeyStr("foo", 2, kTypeSingleDeletion),
|
|
test::KeyStr("foo", 1, kTypeValue)},
|
|
{"", "v1"}, 1 /*last_committed_seq*/);
|
|
}
|
|
|
|
TEST_F(CompactionIteratorWithSnapshotCheckerTest,
|
|
PreserveUncommittedKeys_BlobIndex) {
|
|
RunTest({test::KeyStr("foo", 3, kTypeBlobIndex),
|
|
test::KeyStr("foo", 2, kTypeBlobIndex),
|
|
test::KeyStr("foo", 1, kTypeBlobIndex)},
|
|
{"v3", "v2", "v1"},
|
|
{test::KeyStr("foo", 3, kTypeBlobIndex),
|
|
test::KeyStr("foo", 2, kTypeBlobIndex)},
|
|
{"v3", "v2"}, 2 /*last_committed_seq*/);
|
|
}
|
|
|
|
// Test compaction iterator dedup keys visible to the same snapshot.
|
|
|
|
TEST_F(CompactionIteratorWithSnapshotCheckerTest, DedupSameSnapshot_Value) {
|
|
AddSnapshot(2, 1);
|
|
RunTest(
|
|
{test::KeyStr("foo", 4, kTypeValue), test::KeyStr("foo", 3, kTypeValue),
|
|
test::KeyStr("foo", 2, kTypeValue), test::KeyStr("foo", 1, kTypeValue)},
|
|
{"v4", "v3", "v2", "v1"},
|
|
{test::KeyStr("foo", 4, kTypeValue), test::KeyStr("foo", 3, kTypeValue),
|
|
test::KeyStr("foo", 1, kTypeValue)},
|
|
{"v4", "v3", "v1"}, 3 /*last_committed_seq*/);
|
|
}
|
|
|
|
TEST_F(CompactionIteratorWithSnapshotCheckerTest, DedupSameSnapshot_Deletion) {
|
|
AddSnapshot(2, 1);
|
|
RunTest(
|
|
{test::KeyStr("foo", 4, kTypeValue),
|
|
test::KeyStr("foo", 3, kTypeDeletion),
|
|
test::KeyStr("foo", 2, kTypeValue), test::KeyStr("foo", 1, kTypeValue)},
|
|
{"v4", "", "v2", "v1"},
|
|
{test::KeyStr("foo", 4, kTypeValue),
|
|
test::KeyStr("foo", 3, kTypeDeletion),
|
|
test::KeyStr("foo", 1, kTypeValue)},
|
|
{"v4", "", "v1"}, 3 /*last_committed_seq*/);
|
|
}
|
|
|
|
TEST_F(CompactionIteratorWithSnapshotCheckerTest, DedupSameSnapshot_Merge) {
|
|
AddSnapshot(2, 1);
|
|
AddSnapshot(4, 3);
|
|
auto merge_op = MergeOperators::CreateStringAppendOperator();
|
|
RunTest(
|
|
{test::KeyStr("foo", 5, kTypeMerge), test::KeyStr("foo", 4, kTypeMerge),
|
|
test::KeyStr("foo", 3, kTypeMerge), test::KeyStr("foo", 2, kTypeMerge),
|
|
test::KeyStr("foo", 1, kTypeValue)},
|
|
{"v5", "v4", "v3", "v2", "v1"},
|
|
{test::KeyStr("foo", 5, kTypeMerge), test::KeyStr("foo", 4, kTypeMerge),
|
|
test::KeyStr("foo", 3, kTypeMerge), test::KeyStr("foo", 1, kTypeValue)},
|
|
{"v5", "v4", "v2,v3", "v1"}, 4 /*last_committed_seq*/, merge_op.get());
|
|
}
|
|
|
|
TEST_F(CompactionIteratorWithSnapshotCheckerTest,
|
|
DedupSameSnapshot_SingleDeletion) {
|
|
AddSnapshot(2, 1);
|
|
RunTest(
|
|
{test::KeyStr("foo", 4, kTypeValue),
|
|
test::KeyStr("foo", 3, kTypeSingleDeletion),
|
|
test::KeyStr("foo", 2, kTypeValue), test::KeyStr("foo", 1, kTypeValue)},
|
|
{"v4", "", "v2", "v1"},
|
|
{test::KeyStr("foo", 4, kTypeValue), test::KeyStr("foo", 1, kTypeValue)},
|
|
{"v4", "v1"}, 3 /*last_committed_seq*/);
|
|
}
|
|
|
|
TEST_F(CompactionIteratorWithSnapshotCheckerTest, DedupSameSnapshot_BlobIndex) {
|
|
AddSnapshot(2, 1);
|
|
RunTest({test::KeyStr("foo", 4, kTypeBlobIndex),
|
|
test::KeyStr("foo", 3, kTypeBlobIndex),
|
|
test::KeyStr("foo", 2, kTypeBlobIndex),
|
|
test::KeyStr("foo", 1, kTypeBlobIndex)},
|
|
{"v4", "v3", "v2", "v1"},
|
|
{test::KeyStr("foo", 4, kTypeBlobIndex),
|
|
test::KeyStr("foo", 3, kTypeBlobIndex),
|
|
test::KeyStr("foo", 1, kTypeBlobIndex)},
|
|
{"v4", "v3", "v1"}, 3 /*last_committed_seq*/);
|
|
}
|
|
|
|
// At bottom level, sequence numbers can be zero out, and deletions can be
|
|
// removed, but only when they are visible to earliest snapshot.
|
|
|
|
TEST_F(CompactionIteratorWithSnapshotCheckerTest,
|
|
NotZeroOutSequenceIfNotVisibleToEarliestSnapshot) {
|
|
AddSnapshot(2, 1);
|
|
RunTest({test::KeyStr("a", 1, kTypeValue), test::KeyStr("b", 2, kTypeValue),
|
|
test::KeyStr("c", 3, kTypeValue)},
|
|
{"v1", "v2", "v3"},
|
|
{test::KeyStr("a", 0, kTypeValue), test::KeyStr("b", 2, kTypeValue),
|
|
test::KeyStr("c", 3, kTypeValue)},
|
|
{"v1", "v2", "v3"}, kMaxSequenceNumber /*last_commited_seq*/,
|
|
nullptr /*merge_operator*/, nullptr /*compaction_filter*/,
|
|
true /*bottommost_level*/);
|
|
}
|
|
|
|
TEST_F(CompactionIteratorWithSnapshotCheckerTest,
|
|
NotRemoveDeletionIfNotVisibleToEarliestSnapshot) {
|
|
AddSnapshot(2, 1);
|
|
RunTest(
|
|
{test::KeyStr("a", 1, kTypeDeletion), test::KeyStr("b", 2, kTypeDeletion),
|
|
test::KeyStr("c", 3, kTypeDeletion)},
|
|
{"", "", ""},
|
|
{},
|
|
{"", ""}, kMaxSequenceNumber /*last_commited_seq*/,
|
|
nullptr /*merge_operator*/, nullptr /*compaction_filter*/,
|
|
true /*bottommost_level*/);
|
|
}
|
|
|
|
TEST_F(CompactionIteratorWithSnapshotCheckerTest,
|
|
NotRemoveDeletionIfValuePresentToEarlierSnapshot) {
|
|
AddSnapshot(2,1);
|
|
RunTest(
|
|
{test::KeyStr("a", 4, kTypeDeletion), test::KeyStr("a", 1, kTypeValue),
|
|
test::KeyStr("b", 3, kTypeValue)},
|
|
{"", "", ""},
|
|
{test::KeyStr("a", 4, kTypeDeletion), test::KeyStr("a", 0, kTypeValue),
|
|
test::KeyStr("b", 3, kTypeValue)},
|
|
{"", "", ""}, kMaxSequenceNumber /*last_commited_seq*/,
|
|
nullptr /*merge_operator*/, nullptr /*compaction_filter*/,
|
|
true /*bottommost_level*/);
|
|
}
|
|
|
|
TEST_F(CompactionIteratorWithSnapshotCheckerTest,
|
|
NotRemoveSingleDeletionIfNotVisibleToEarliestSnapshot) {
|
|
AddSnapshot(2, 1);
|
|
RunTest({test::KeyStr("a", 1, kTypeSingleDeletion),
|
|
test::KeyStr("b", 2, kTypeSingleDeletion),
|
|
test::KeyStr("c", 3, kTypeSingleDeletion)},
|
|
{"", "", ""},
|
|
{test::KeyStr("b", 2, kTypeSingleDeletion),
|
|
test::KeyStr("c", 3, kTypeSingleDeletion)},
|
|
{"", ""}, kMaxSequenceNumber /*last_commited_seq*/,
|
|
nullptr /*merge_operator*/, nullptr /*compaction_filter*/,
|
|
true /*bottommost_level*/);
|
|
}
|
|
|
|
// Single delete should not cancel out values that not visible to the
|
|
// same set of snapshots
|
|
TEST_F(CompactionIteratorWithSnapshotCheckerTest,
|
|
SingleDeleteAcrossSnapshotBoundary) {
|
|
AddSnapshot(2, 1);
|
|
RunTest({test::KeyStr("a", 2, kTypeSingleDeletion),
|
|
test::KeyStr("a", 1, kTypeValue)},
|
|
{"", "v1"},
|
|
{test::KeyStr("a", 2, kTypeSingleDeletion),
|
|
test::KeyStr("a", 1, kTypeValue)},
|
|
{"", "v1"}, 2 /*last_committed_seq*/);
|
|
}
|
|
|
|
// Single delete should be kept in case it is not visible to the
|
|
// earliest write conflict snapshot. If a single delete is kept for this reason,
|
|
// corresponding value can be trimmed to save space.
|
|
TEST_F(CompactionIteratorWithSnapshotCheckerTest,
|
|
KeepSingleDeletionForWriteConflictChecking) {
|
|
AddSnapshot(2, 0);
|
|
RunTest({test::KeyStr("a", 2, kTypeSingleDeletion),
|
|
test::KeyStr("a", 1, kTypeValue)},
|
|
{"", "v1"},
|
|
{test::KeyStr("a", 2, kTypeSingleDeletion),
|
|
test::KeyStr("a", 1, kTypeValue)},
|
|
{"", ""}, 2 /*last_committed_seq*/, nullptr /*merge_operator*/,
|
|
nullptr /*compaction_filter*/, false /*bottommost_level*/,
|
|
2 /*earliest_write_conflict_snapshot*/);
|
|
}
|
|
|
|
// Compaction filter should keep uncommitted key as-is, and
|
|
// * Convert the latest velue to deletion, and/or
|
|
// * if latest value is a merge, apply filter to all suequent merges.
|
|
|
|
TEST_F(CompactionIteratorWithSnapshotCheckerTest, CompactionFilter_Value) {
|
|
std::unique_ptr<CompactionFilter> compaction_filter(
|
|
new FilterAllKeysCompactionFilter());
|
|
RunTest(
|
|
{test::KeyStr("a", 2, kTypeValue), test::KeyStr("a", 1, kTypeValue),
|
|
test::KeyStr("b", 3, kTypeValue), test::KeyStr("c", 1, kTypeValue)},
|
|
{"v2", "v1", "v3", "v4"},
|
|
{test::KeyStr("a", 2, kTypeValue), test::KeyStr("a", 1, kTypeDeletion),
|
|
test::KeyStr("b", 3, kTypeValue), test::KeyStr("c", 1, kTypeDeletion)},
|
|
{"v2", "", "v3", ""}, 1 /*last_committed_seq*/,
|
|
nullptr /*merge_operator*/, compaction_filter.get());
|
|
}
|
|
|
|
TEST_F(CompactionIteratorWithSnapshotCheckerTest, CompactionFilter_Deletion) {
|
|
std::unique_ptr<CompactionFilter> compaction_filter(
|
|
new FilterAllKeysCompactionFilter());
|
|
RunTest(
|
|
{test::KeyStr("a", 2, kTypeDeletion), test::KeyStr("a", 1, kTypeValue)},
|
|
{"", "v1"},
|
|
{test::KeyStr("a", 2, kTypeDeletion),
|
|
test::KeyStr("a", 1, kTypeDeletion)},
|
|
{"", ""}, 1 /*last_committed_seq*/, nullptr /*merge_operator*/,
|
|
compaction_filter.get());
|
|
}
|
|
|
|
TEST_F(CompactionIteratorWithSnapshotCheckerTest,
|
|
CompactionFilter_PartialMerge) {
|
|
std::shared_ptr<MergeOperator> merge_op =
|
|
MergeOperators::CreateStringAppendOperator();
|
|
std::unique_ptr<CompactionFilter> compaction_filter(
|
|
new FilterAllKeysCompactionFilter());
|
|
RunTest({test::KeyStr("a", 3, kTypeMerge), test::KeyStr("a", 2, kTypeMerge),
|
|
test::KeyStr("a", 1, kTypeMerge)},
|
|
{"v3", "v2", "v1"}, {test::KeyStr("a", 3, kTypeMerge)}, {"v3"},
|
|
2 /*last_committed_seq*/, merge_op.get(), compaction_filter.get());
|
|
}
|
|
|
|
TEST_F(CompactionIteratorWithSnapshotCheckerTest, CompactionFilter_FullMerge) {
|
|
std::shared_ptr<MergeOperator> merge_op =
|
|
MergeOperators::CreateStringAppendOperator();
|
|
std::unique_ptr<CompactionFilter> compaction_filter(
|
|
new FilterAllKeysCompactionFilter());
|
|
RunTest(
|
|
{test::KeyStr("a", 3, kTypeMerge), test::KeyStr("a", 2, kTypeMerge),
|
|
test::KeyStr("a", 1, kTypeValue)},
|
|
{"v3", "v2", "v1"},
|
|
{test::KeyStr("a", 3, kTypeMerge), test::KeyStr("a", 1, kTypeDeletion)},
|
|
{"v3", ""}, 2 /*last_committed_seq*/, merge_op.get(),
|
|
compaction_filter.get());
|
|
}
|
|
|
|
// Tests how CompactionIterator work together with AllowIngestBehind.
|
|
class CompactionIteratorWithAllowIngestBehindTest
|
|
: public CompactionIteratorTest {
|
|
public:
|
|
bool AllowIngestBehind() const override { return true; }
|
|
};
|
|
|
|
// When allow_ingest_behind is set, compaction iterator is not targeting
|
|
// the bottommost level since there is no guarantee there won't be further
|
|
// data ingested under the compaction output in future.
|
|
TEST_P(CompactionIteratorWithAllowIngestBehindTest, NoConvertToPutAtBottom) {
|
|
std::shared_ptr<MergeOperator> merge_op =
|
|
MergeOperators::CreateStringAppendOperator();
|
|
RunTest({test::KeyStr("a", 4, kTypeMerge), test::KeyStr("a", 3, kTypeMerge),
|
|
test::KeyStr("a", 2, kTypeMerge), test::KeyStr("b", 1, kTypeValue)},
|
|
{"a4", "a3", "a2", "b1"},
|
|
{test::KeyStr("a", 4, kTypeMerge), test::KeyStr("b", 1, kTypeValue)},
|
|
{"a2,a3,a4", "b1"}, kMaxSequenceNumber /*last_committed_seq*/,
|
|
merge_op.get(), nullptr /*compaction_filter*/,
|
|
true /*bottomost_level*/);
|
|
}
|
|
|
|
TEST_P(CompactionIteratorWithAllowIngestBehindTest,
|
|
MergeToPutIfEncounteredPutAtBottom) {
|
|
std::shared_ptr<MergeOperator> merge_op =
|
|
MergeOperators::CreateStringAppendOperator();
|
|
RunTest({test::KeyStr("a", 4, kTypeMerge), test::KeyStr("a", 3, kTypeMerge),
|
|
test::KeyStr("a", 2, kTypeValue), test::KeyStr("b", 1, kTypeValue)},
|
|
{"a4", "a3", "a2", "b1"},
|
|
{test::KeyStr("a", 4, kTypeValue), test::KeyStr("b", 1, kTypeValue)},
|
|
{"a2,a3,a4", "b1"}, kMaxSequenceNumber /*last_committed_seq*/,
|
|
merge_op.get(), nullptr /*compaction_filter*/,
|
|
true /*bottomost_level*/);
|
|
}
|
|
|
|
INSTANTIATE_TEST_CASE_P(CompactionIteratorWithAllowIngestBehindTestInstance,
|
|
CompactionIteratorWithAllowIngestBehindTest,
|
|
testing::Values(true, false));
|
|
|
|
class CompactionIteratorTsGcTest : public CompactionIteratorTest {
|
|
public:
|
|
CompactionIteratorTsGcTest()
|
|
: CompactionIteratorTest(test::ComparatorWithU64Ts()) {}
|
|
};
|
|
|
|
TEST_P(CompactionIteratorTsGcTest, NoKeyEligibleForGC) {
|
|
constexpr char user_key[] = "a";
|
|
const std::vector<std::string> input_keys = {
|
|
test::KeyStr(/*ts=*/103, user_key, /*seq=*/4, kTypeValue),
|
|
test::KeyStr(/*ts=*/102, user_key, /*seq=*/3,
|
|
kTypeDeletionWithTimestamp)};
|
|
const std::vector<std::string> input_values = {"a3", ""};
|
|
std::string full_history_ts_low;
|
|
// All keys' timestamps are newer than or equal to 102, thus none of them
|
|
// will be eligible for GC.
|
|
PutFixed64(&full_history_ts_low, 102);
|
|
const std::vector<std::string>& expected_keys = input_keys;
|
|
const std::vector<std::string>& expected_values = input_values;
|
|
const std::vector<std::pair<bool, bool>> params = {
|
|
{false, false}, {false, true}, {true, true}};
|
|
for (const std::pair<bool, bool>& param : params) {
|
|
const bool bottommost_level = param.first;
|
|
const bool key_not_exists_beyond_output_level = param.second;
|
|
RunTest(input_keys, input_values, expected_keys, expected_values,
|
|
/*last_committed_seq=*/kMaxSequenceNumber,
|
|
/*merge_operator=*/nullptr, /*compaction_filter=*/nullptr,
|
|
bottommost_level,
|
|
/*earliest_write_conflict_snapshot=*/kMaxSequenceNumber,
|
|
key_not_exists_beyond_output_level, &full_history_ts_low);
|
|
}
|
|
}
|
|
|
|
TEST_P(CompactionIteratorTsGcTest, AllKeysOlderThanThreshold) {
|
|
constexpr char user_key[] = "a";
|
|
const std::vector<std::string> input_keys = {
|
|
test::KeyStr(/*ts=*/103, user_key, /*seq=*/4, kTypeDeletionWithTimestamp),
|
|
test::KeyStr(/*ts=*/102, user_key, /*seq=*/3, kTypeValue),
|
|
test::KeyStr(/*ts=*/101, user_key, /*seq=*/2, kTypeValue)};
|
|
const std::vector<std::string> input_values = {"", "a2", "a1"};
|
|
std::string full_history_ts_low;
|
|
// All keys' timestamps are older than 104.
|
|
PutFixed64(&full_history_ts_low, 104);
|
|
{
|
|
// With a snapshot at seq 3, both the deletion marker and the key at 3 must
|
|
// be preserved.
|
|
AddSnapshot(3);
|
|
const std::vector<std::string> expected_keys = {input_keys[0],
|
|
input_keys[1]};
|
|
const std::vector<std::string> expected_values = {"", "a2"};
|
|
RunTest(input_keys, input_values, expected_keys, expected_values,
|
|
/*last_committed_seq=*/kMaxSequenceNumber,
|
|
/*merge_operator=*/nullptr, /*compaction_filter=*/nullptr,
|
|
/*bottommost_level=*/false,
|
|
/*earliest_write_conflict_snapshot=*/kMaxSequenceNumber,
|
|
/*key_not_exists_beyond_output_level=*/false, &full_history_ts_low);
|
|
ClearSnapshots();
|
|
}
|
|
{
|
|
// No snapshot, the deletion marker should be preserved because the user
|
|
// key may appear beyond output level.
|
|
const std::vector<std::string> expected_keys = {input_keys[0]};
|
|
const std::vector<std::string> expected_values = {""};
|
|
RunTest(input_keys, input_values, expected_keys, expected_values,
|
|
/*last_committed_seq=*/kMaxSequenceNumber,
|
|
/*merge_operator=*/nullptr, /*compaction_filter=*/nullptr,
|
|
/*bottommost_level=*/false,
|
|
/*earliest_write_conflict_snapshot=*/kMaxSequenceNumber,
|
|
/*key_not_exists_beyond_output_level=*/false, &full_history_ts_low);
|
|
}
|
|
{
|
|
// No snapshot, the deletion marker can be dropped because the user key
|
|
// does not appear in higher levels.
|
|
const std::vector<std::string> expected_keys = {};
|
|
const std::vector<std::string> expected_values = {};
|
|
RunTest(input_keys, input_values, expected_keys, expected_values,
|
|
/*last_committed_seq=*/kMaxSequenceNumber,
|
|
/*merge_operator=*/nullptr, /*compaction_filter=*/nullptr,
|
|
/*bottommost_level=*/false,
|
|
/*earliest_write_conflict_snapshot=*/kMaxSequenceNumber,
|
|
/*key_not_exists_beyond_output_level=*/true, &full_history_ts_low);
|
|
}
|
|
}
|
|
|
|
TEST_P(CompactionIteratorTsGcTest, NewHidesOldSameSnapshot) {
|
|
constexpr char user_key[] = "a";
|
|
const std::vector<std::string> input_keys = {
|
|
test::KeyStr(/*ts=*/103, user_key, /*seq=*/4, kTypeDeletionWithTimestamp),
|
|
test::KeyStr(/*ts=*/102, user_key, /*seq=*/3, kTypeValue),
|
|
test::KeyStr(/*ts=*/101, user_key, /*seq=*/2, kTypeValue),
|
|
test::KeyStr(/*ts=*/100, user_key, /*seq=*/1, kTypeValue)};
|
|
const std::vector<std::string> input_values = {"", "a2", "a1", "a0"};
|
|
{
|
|
std::string full_history_ts_low;
|
|
// Keys whose timestamps larger than or equal to 102 will be preserved.
|
|
PutFixed64(&full_history_ts_low, 102);
|
|
const std::vector<std::string> expected_keys = {input_keys[0],
|
|
input_keys[1]};
|
|
const std::vector<std::string> expected_values = {"", "a2"};
|
|
RunTest(input_keys, input_values, expected_keys, expected_values,
|
|
/*last_committed_seq=*/kMaxSequenceNumber,
|
|
/*merge_operator=*/nullptr, /*compaction_filter=*/nullptr,
|
|
/*bottommost_level=*/false,
|
|
/*earliest_write_conflict_snapshot=*/kMaxSequenceNumber,
|
|
/*key_not_exists_beyond_output_level=*/false, &full_history_ts_low);
|
|
}
|
|
}
|
|
|
|
TEST_P(CompactionIteratorTsGcTest, DropTombstones) {
|
|
constexpr char user_key[] = "a";
|
|
const std::vector<std::string> input_keys = {
|
|
test::KeyStr(/*ts=*/103, user_key, /*seq=*/4, kTypeDeletionWithTimestamp),
|
|
test::KeyStr(/*ts=*/102, user_key, /*seq=*/3, kTypeValue),
|
|
test::KeyStr(/*ts=*/101, user_key, /*seq=*/2, kTypeDeletionWithTimestamp),
|
|
test::KeyStr(/*ts=*/100, user_key, /*seq=*/1, kTypeValue)};
|
|
const std::vector<std::string> input_values = {"", "a2", "", "a0"};
|
|
const std::vector<std::string> expected_keys = {input_keys[0], input_keys[1]};
|
|
const std::vector<std::string> expected_values = {"", "a2"};
|
|
|
|
// Take a snapshot at seq 2.
|
|
AddSnapshot(2);
|
|
|
|
{
|
|
// Non-bottommost level, but key does not exist beyond output level.
|
|
std::string full_history_ts_low;
|
|
PutFixed64(&full_history_ts_low, 102);
|
|
RunTest(input_keys, input_values, expected_keys, expected_values,
|
|
/*last_committed_sequence=*/kMaxSequenceNumber,
|
|
/*merge_op=*/nullptr, /*compaction_filter=*/nullptr,
|
|
/*bottommost_level=*/false,
|
|
/*earliest_write_conflict_snapshot=*/kMaxSequenceNumber,
|
|
/*key_not_exists_beyond_output_level=*/true, &full_history_ts_low);
|
|
}
|
|
{
|
|
// Bottommost level
|
|
std::string full_history_ts_low;
|
|
PutFixed64(&full_history_ts_low, 102);
|
|
RunTest(input_keys, input_values, expected_keys, expected_values,
|
|
/*last_committed_seq=*/kMaxSequenceNumber,
|
|
/*merge_operator=*/nullptr, /*compaction_filter=*/nullptr,
|
|
/*bottommost_level=*/true,
|
|
/*earliest_write_conflict_snapshot=*/kMaxSequenceNumber,
|
|
/*key_not_exists_beyond_output_level=*/false, &full_history_ts_low);
|
|
}
|
|
}
|
|
|
|
TEST_P(CompactionIteratorTsGcTest, RewriteTs) {
|
|
constexpr char user_key[] = "a";
|
|
const std::vector<std::string> input_keys = {
|
|
test::KeyStr(/*ts=*/103, user_key, /*seq=*/4, kTypeDeletionWithTimestamp),
|
|
test::KeyStr(/*ts=*/102, user_key, /*seq=*/3, kTypeValue),
|
|
test::KeyStr(/*ts=*/101, user_key, /*seq=*/2, kTypeDeletionWithTimestamp),
|
|
test::KeyStr(/*ts=*/100, user_key, /*seq=*/1, kTypeValue)};
|
|
const std::vector<std::string> input_values = {"", "a2", "", "a0"};
|
|
const std::vector<std::string> expected_keys = {
|
|
input_keys[0], input_keys[1], input_keys[2],
|
|
test::KeyStr(/*ts=*/0, user_key, /*seq=*/0, kTypeValue)};
|
|
const std::vector<std::string> expected_values = {"", "a2", "", "a0"};
|
|
|
|
AddSnapshot(1);
|
|
AddSnapshot(2);
|
|
|
|
{
|
|
// Bottommost level and need to rewrite both ts and seq.
|
|
std::string full_history_ts_low;
|
|
PutFixed64(&full_history_ts_low, 102);
|
|
RunTest(input_keys, input_values, expected_keys, expected_values,
|
|
/*last_committed_seq=*/kMaxSequenceNumber,
|
|
/*merge_operator=*/nullptr, /*compaction_filter=*/nullptr,
|
|
/*bottommost_level=*/true,
|
|
/*earliest_write_conflict_snapshot=*/kMaxSequenceNumber,
|
|
/*key_not_exists_beyond_output_level=*/true, &full_history_ts_low);
|
|
}
|
|
}
|
|
|
|
INSTANTIATE_TEST_CASE_P(CompactionIteratorTsGcTestInstance,
|
|
CompactionIteratorTsGcTest,
|
|
testing::Values(true, false));
|
|
|
|
} // namespace ROCKSDB_NAMESPACE
|
|
|
|
int main(int argc, char** argv) {
|
|
::testing::InitGoogleTest(&argc, argv);
|
|
return RUN_ALL_TESTS();
|
|
}
|