457f77b9ff
Summary: The old RangeDelAggregator did expensive pre-processing work to create a collapsed, binary-searchable representation of range tombstones. With FragmentedRangeTombstoneIterator, much of this work is now unnecessary. RangeDelAggregatorV2 takes advantage of this by seeking in each iterator to find a covering tombstone in ShouldDelete, while doing minimal work in AddTombstones. The old RangeDelAggregator is still used during flush/compaction for now, though RangeDelAggregatorV2 will support those uses in a future PR. Pull Request resolved: https://github.com/facebook/rocksdb/pull/4649 Differential Revision: D13146964 Pulled By: abhimadan fbshipit-source-id: be29a4c020fc440500c137216fcc1cf529571eb3
470 lines
20 KiB
C++
470 lines
20 KiB
C++
// Copyright (c) 2018-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 "db/range_del_aggregator_v2.h"
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#include <memory>
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#include <string>
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#include <vector>
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#include "db/db_test_util.h"
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#include "db/dbformat.h"
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#include "db/range_tombstone_fragmenter.h"
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#include "util/testutil.h"
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namespace rocksdb {
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class RangeDelAggregatorV2Test : public testing::Test {};
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namespace {
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static auto bytewise_icmp = InternalKeyComparator(BytewiseComparator());
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std::unique_ptr<InternalIterator> MakeRangeDelIter(
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const std::vector<RangeTombstone>& range_dels) {
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std::vector<std::string> keys, values;
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for (const auto& range_del : range_dels) {
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auto key_and_value = range_del.Serialize();
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keys.push_back(key_and_value.first.Encode().ToString());
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values.push_back(key_and_value.second.ToString());
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}
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return std::unique_ptr<test::VectorIterator>(
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new test::VectorIterator(keys, values));
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}
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std::vector<std::unique_ptr<FragmentedRangeTombstoneList>>
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MakeFragmentedTombstoneLists(
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const std::vector<std::vector<RangeTombstone>>& range_dels_list) {
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std::vector<std::unique_ptr<FragmentedRangeTombstoneList>> fragment_lists;
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for (const auto& range_dels : range_dels_list) {
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auto range_del_iter = MakeRangeDelIter(range_dels);
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fragment_lists.emplace_back(new FragmentedRangeTombstoneList(
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std::move(range_del_iter), bytewise_icmp, false /* one_time_use */));
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}
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return fragment_lists;
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}
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struct TruncatedIterScanTestCase {
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ParsedInternalKey start;
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ParsedInternalKey end;
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SequenceNumber seq;
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};
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struct TruncatedIterSeekTestCase {
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Slice target;
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ParsedInternalKey start;
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ParsedInternalKey end;
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SequenceNumber seq;
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bool invalid;
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};
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struct ShouldDeleteTestCase {
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ParsedInternalKey lookup_key;
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bool result;
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};
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struct IsRangeOverlappedTestCase {
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Slice start;
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Slice end;
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bool result;
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};
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ParsedInternalKey UncutEndpoint(const Slice& s) {
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return ParsedInternalKey(s, kMaxSequenceNumber, kTypeRangeDeletion);
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}
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ParsedInternalKey InternalValue(const Slice& key, SequenceNumber seq) {
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return ParsedInternalKey(key, seq, kTypeValue);
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}
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void VerifyIterator(
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TruncatedRangeDelIterator* iter, const InternalKeyComparator& icmp,
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const std::vector<TruncatedIterScanTestCase>& expected_range_dels) {
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// Test forward iteration.
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iter->SeekToFirst();
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for (size_t i = 0; i < expected_range_dels.size(); i++, iter->Next()) {
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ASSERT_TRUE(iter->Valid());
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EXPECT_EQ(0, icmp.Compare(iter->start_key(), expected_range_dels[i].start));
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EXPECT_EQ(0, icmp.Compare(iter->end_key(), expected_range_dels[i].end));
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EXPECT_EQ(expected_range_dels[i].seq, iter->seq());
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}
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EXPECT_FALSE(iter->Valid());
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// Test reverse iteration.
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iter->SeekToLast();
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std::vector<TruncatedIterScanTestCase> reverse_expected_range_dels(
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expected_range_dels.rbegin(), expected_range_dels.rend());
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for (size_t i = 0; i < reverse_expected_range_dels.size();
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i++, iter->Prev()) {
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ASSERT_TRUE(iter->Valid());
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EXPECT_EQ(0, icmp.Compare(iter->start_key(),
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reverse_expected_range_dels[i].start));
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EXPECT_EQ(
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0, icmp.Compare(iter->end_key(), reverse_expected_range_dels[i].end));
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EXPECT_EQ(reverse_expected_range_dels[i].seq, iter->seq());
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}
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EXPECT_FALSE(iter->Valid());
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}
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void VerifySeek(TruncatedRangeDelIterator* iter,
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const InternalKeyComparator& icmp,
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const std::vector<TruncatedIterSeekTestCase>& test_cases) {
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for (const auto& test_case : test_cases) {
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iter->Seek(test_case.target);
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if (test_case.invalid) {
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ASSERT_FALSE(iter->Valid());
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} else {
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ASSERT_TRUE(iter->Valid());
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EXPECT_EQ(0, icmp.Compare(iter->start_key(), test_case.start));
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EXPECT_EQ(0, icmp.Compare(iter->end_key(), test_case.end));
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EXPECT_EQ(test_case.seq, iter->seq());
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}
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}
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}
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void VerifySeekForPrev(
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TruncatedRangeDelIterator* iter, const InternalKeyComparator& icmp,
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const std::vector<TruncatedIterSeekTestCase>& test_cases) {
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for (const auto& test_case : test_cases) {
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iter->SeekForPrev(test_case.target);
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if (test_case.invalid) {
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ASSERT_FALSE(iter->Valid());
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} else {
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ASSERT_TRUE(iter->Valid());
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EXPECT_EQ(0, icmp.Compare(iter->start_key(), test_case.start));
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EXPECT_EQ(0, icmp.Compare(iter->end_key(), test_case.end));
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EXPECT_EQ(test_case.seq, iter->seq());
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}
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}
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}
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void VerifyShouldDelete(RangeDelAggregatorV2* range_del_agg,
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const std::vector<ShouldDeleteTestCase>& test_cases) {
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for (const auto& test_case : test_cases) {
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EXPECT_EQ(
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test_case.result,
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range_del_agg->ShouldDelete(
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test_case.lookup_key, RangeDelPositioningMode::kForwardTraversal));
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}
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for (auto it = test_cases.rbegin(); it != test_cases.rend(); ++it) {
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const auto& test_case = *it;
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EXPECT_EQ(
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test_case.result,
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range_del_agg->ShouldDelete(
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test_case.lookup_key, RangeDelPositioningMode::kBackwardTraversal));
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}
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}
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void VerifyIsRangeOverlapped(
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RangeDelAggregatorV2* range_del_agg,
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const std::vector<IsRangeOverlappedTestCase>& test_cases) {
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for (const auto& test_case : test_cases) {
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EXPECT_EQ(test_case.result,
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range_del_agg->IsRangeOverlapped(test_case.start, test_case.end));
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}
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}
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} // namespace
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TEST_F(RangeDelAggregatorV2Test, EmptyTruncatedIter) {
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auto range_del_iter = MakeRangeDelIter({});
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FragmentedRangeTombstoneList fragment_list(
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std::move(range_del_iter), bytewise_icmp, true /* one_time_use */);
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std::unique_ptr<FragmentedRangeTombstoneIterator> input_iter(
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new FragmentedRangeTombstoneIterator(&fragment_list, kMaxSequenceNumber,
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bytewise_icmp));
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TruncatedRangeDelIterator iter(std::move(input_iter), &bytewise_icmp, nullptr,
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nullptr);
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iter.SeekToFirst();
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ASSERT_FALSE(iter.Valid());
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iter.SeekToLast();
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ASSERT_FALSE(iter.Valid());
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}
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TEST_F(RangeDelAggregatorV2Test, UntruncatedIter) {
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auto range_del_iter =
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MakeRangeDelIter({{"a", "e", 10}, {"e", "g", 8}, {"j", "n", 4}});
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FragmentedRangeTombstoneList fragment_list(
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std::move(range_del_iter), bytewise_icmp, false /* one_time_use */);
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std::unique_ptr<FragmentedRangeTombstoneIterator> input_iter(
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new FragmentedRangeTombstoneIterator(&fragment_list, kMaxSequenceNumber,
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bytewise_icmp));
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TruncatedRangeDelIterator iter(std::move(input_iter), &bytewise_icmp, nullptr,
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nullptr);
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VerifyIterator(&iter, bytewise_icmp,
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{{UncutEndpoint("a"), UncutEndpoint("e"), 10},
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{UncutEndpoint("e"), UncutEndpoint("g"), 8},
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{UncutEndpoint("j"), UncutEndpoint("n"), 4}});
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VerifySeek(
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&iter, bytewise_icmp,
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{{"d", UncutEndpoint("a"), UncutEndpoint("e"), 10},
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{"e", UncutEndpoint("e"), UncutEndpoint("g"), 8},
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{"ia", UncutEndpoint("j"), UncutEndpoint("n"), 4},
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{"n", UncutEndpoint(""), UncutEndpoint(""), 0, true /* invalid */},
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{"", UncutEndpoint("a"), UncutEndpoint("e"), 10}});
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VerifySeekForPrev(
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&iter, bytewise_icmp,
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{{"d", UncutEndpoint("a"), UncutEndpoint("e"), 10},
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{"e", UncutEndpoint("e"), UncutEndpoint("g"), 8},
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{"ia", UncutEndpoint("e"), UncutEndpoint("g"), 8},
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{"n", UncutEndpoint("j"), UncutEndpoint("n"), 4},
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{"", UncutEndpoint(""), UncutEndpoint(""), 0, true /* invalid */}});
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}
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TEST_F(RangeDelAggregatorV2Test, UntruncatedIterWithSnapshot) {
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auto range_del_iter =
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MakeRangeDelIter({{"a", "e", 10}, {"e", "g", 8}, {"j", "n", 4}});
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FragmentedRangeTombstoneList fragment_list(
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std::move(range_del_iter), bytewise_icmp, false /* one_time_use */);
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std::unique_ptr<FragmentedRangeTombstoneIterator> input_iter(
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new FragmentedRangeTombstoneIterator(&fragment_list, 9 /* snapshot */,
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bytewise_icmp));
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TruncatedRangeDelIterator iter(std::move(input_iter), &bytewise_icmp, nullptr,
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nullptr);
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VerifyIterator(&iter, bytewise_icmp,
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{{UncutEndpoint("e"), UncutEndpoint("g"), 8},
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{UncutEndpoint("j"), UncutEndpoint("n"), 4}});
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VerifySeek(
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&iter, bytewise_icmp,
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{{"d", UncutEndpoint("e"), UncutEndpoint("g"), 8},
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{"e", UncutEndpoint("e"), UncutEndpoint("g"), 8},
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{"ia", UncutEndpoint("j"), UncutEndpoint("n"), 4},
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{"n", UncutEndpoint(""), UncutEndpoint(""), 0, true /* invalid */},
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{"", UncutEndpoint("e"), UncutEndpoint("g"), 8}});
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VerifySeekForPrev(
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&iter, bytewise_icmp,
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{{"d", UncutEndpoint(""), UncutEndpoint(""), 0, true /* invalid */},
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{"e", UncutEndpoint("e"), UncutEndpoint("g"), 8},
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{"ia", UncutEndpoint("e"), UncutEndpoint("g"), 8},
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{"n", UncutEndpoint("j"), UncutEndpoint("n"), 4},
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{"", UncutEndpoint(""), UncutEndpoint(""), 0, true /* invalid */}});
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}
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TEST_F(RangeDelAggregatorV2Test, TruncatedIter) {
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auto range_del_iter =
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MakeRangeDelIter({{"a", "e", 10}, {"e", "g", 8}, {"j", "n", 4}});
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FragmentedRangeTombstoneList fragment_list(
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std::move(range_del_iter), bytewise_icmp, false /* one_time_use */);
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std::unique_ptr<FragmentedRangeTombstoneIterator> input_iter(
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new FragmentedRangeTombstoneIterator(&fragment_list, kMaxSequenceNumber,
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bytewise_icmp));
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InternalKey smallest("d", 7, kTypeValue);
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InternalKey largest("m", 9, kTypeValue);
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TruncatedRangeDelIterator iter(std::move(input_iter), &bytewise_icmp,
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&smallest, &largest);
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VerifyIterator(&iter, bytewise_icmp,
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{{InternalValue("d", 7), UncutEndpoint("e"), 10},
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{UncutEndpoint("e"), UncutEndpoint("g"), 8},
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{UncutEndpoint("j"), InternalValue("m", 8), 4}});
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VerifySeek(
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&iter, bytewise_icmp,
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{{"d", InternalValue("d", 7), UncutEndpoint("e"), 10},
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{"e", UncutEndpoint("e"), UncutEndpoint("g"), 8},
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{"ia", UncutEndpoint("j"), InternalValue("m", 8), 4},
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{"n", UncutEndpoint(""), UncutEndpoint(""), 0, true /* invalid */},
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{"", InternalValue("d", 7), UncutEndpoint("e"), 10}});
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VerifySeekForPrev(
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&iter, bytewise_icmp,
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{{"d", InternalValue("d", 7), UncutEndpoint("e"), 10},
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{"e", UncutEndpoint("e"), UncutEndpoint("g"), 8},
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{"ia", UncutEndpoint("e"), UncutEndpoint("g"), 8},
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{"n", UncutEndpoint("j"), InternalValue("m", 8), 4},
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{"", UncutEndpoint(""), UncutEndpoint(""), 0, true /* invalid */}});
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}
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TEST_F(RangeDelAggregatorV2Test, SingleIterInAggregator) {
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auto range_del_iter = MakeRangeDelIter({{"a", "e", 10}, {"c", "g", 8}});
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FragmentedRangeTombstoneList fragment_list(
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std::move(range_del_iter), bytewise_icmp, false /* one_time_use */);
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std::unique_ptr<FragmentedRangeTombstoneIterator> input_iter(
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new FragmentedRangeTombstoneIterator(&fragment_list, kMaxSequenceNumber,
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bytewise_icmp));
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RangeDelAggregatorV2 range_del_agg(&bytewise_icmp, kMaxSequenceNumber);
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range_del_agg.AddTombstones(std::move(input_iter));
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VerifyShouldDelete(&range_del_agg, {{InternalValue("a", 19), false},
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{InternalValue("b", 9), true},
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{InternalValue("d", 9), true},
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{InternalValue("e", 7), true},
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{InternalValue("g", 7), false}});
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VerifyIsRangeOverlapped(&range_del_agg, {{"", "_", false},
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{"_", "a", true},
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{"a", "c", true},
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{"d", "f", true},
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{"g", "l", false}});
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}
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TEST_F(RangeDelAggregatorV2Test, MultipleItersInAggregator) {
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auto fragment_lists = MakeFragmentedTombstoneLists(
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{{{"a", "e", 10}, {"c", "g", 8}},
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{{"a", "b", 20}, {"h", "i", 25}, {"ii", "j", 15}}});
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RangeDelAggregatorV2 range_del_agg(&bytewise_icmp, kMaxSequenceNumber);
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for (const auto& fragment_list : fragment_lists) {
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std::unique_ptr<FragmentedRangeTombstoneIterator> input_iter(
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new FragmentedRangeTombstoneIterator(
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fragment_list.get(), kMaxSequenceNumber, bytewise_icmp));
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range_del_agg.AddTombstones(std::move(input_iter));
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}
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VerifyShouldDelete(&range_del_agg, {{InternalValue("a", 19), true},
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{InternalValue("b", 19), false},
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{InternalValue("b", 9), true},
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{InternalValue("d", 9), true},
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{InternalValue("e", 7), true},
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{InternalValue("g", 7), false},
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{InternalValue("h", 24), true},
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{InternalValue("i", 24), false},
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{InternalValue("ii", 14), true},
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{InternalValue("j", 14), false}});
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VerifyIsRangeOverlapped(&range_del_agg, {{"", "_", false},
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{"_", "a", true},
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{"a", "c", true},
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{"d", "f", true},
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{"g", "l", true},
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{"x", "y", false}});
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}
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TEST_F(RangeDelAggregatorV2Test, MultipleItersInAggregatorWithUpperBound) {
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auto fragment_lists = MakeFragmentedTombstoneLists(
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{{{"a", "e", 10}, {"c", "g", 8}},
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{{"a", "b", 20}, {"h", "i", 25}, {"ii", "j", 15}}});
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RangeDelAggregatorV2 range_del_agg(&bytewise_icmp, 19);
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for (const auto& fragment_list : fragment_lists) {
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std::unique_ptr<FragmentedRangeTombstoneIterator> input_iter(
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new FragmentedRangeTombstoneIterator(fragment_list.get(),
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19 /* snapshot */, bytewise_icmp));
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range_del_agg.AddTombstones(std::move(input_iter));
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}
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VerifyShouldDelete(&range_del_agg, {{InternalValue("a", 19), false},
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{InternalValue("a", 9), true},
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{InternalValue("b", 9), true},
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{InternalValue("d", 9), true},
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{InternalValue("e", 7), true},
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{InternalValue("g", 7), false},
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{InternalValue("h", 24), false},
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{InternalValue("i", 24), false},
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{InternalValue("ii", 14), true},
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{InternalValue("j", 14), false}});
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VerifyIsRangeOverlapped(&range_del_agg, {{"", "_", false},
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{"_", "a", true},
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{"a", "c", true},
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{"d", "f", true},
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{"g", "l", true},
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{"x", "y", false}});
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}
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TEST_F(RangeDelAggregatorV2Test, MultipleTruncatedItersInAggregator) {
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auto fragment_lists = MakeFragmentedTombstoneLists(
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{{{"a", "z", 10}}, {{"a", "z", 10}}, {{"a", "z", 10}}});
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std::vector<std::pair<InternalKey, InternalKey>> iter_bounds = {
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{InternalKey("a", 4, kTypeValue),
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InternalKey("m", kMaxSequenceNumber, kTypeRangeDeletion)},
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{InternalKey("m", 20, kTypeValue),
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InternalKey("x", kMaxSequenceNumber, kTypeRangeDeletion)},
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{InternalKey("x", 5, kTypeValue), InternalKey("zz", 30, kTypeValue)}};
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RangeDelAggregatorV2 range_del_agg(&bytewise_icmp, 19);
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for (size_t i = 0; i < fragment_lists.size(); i++) {
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const auto& fragment_list = fragment_lists[i];
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const auto& bounds = iter_bounds[i];
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std::unique_ptr<FragmentedRangeTombstoneIterator> input_iter(
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new FragmentedRangeTombstoneIterator(fragment_list.get(),
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19 /* snapshot */, bytewise_icmp));
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range_del_agg.AddTombstones(std::move(input_iter), &bounds.first,
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&bounds.second);
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}
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VerifyShouldDelete(&range_del_agg, {{InternalValue("a", 10), false},
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{InternalValue("a", 9), false},
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{InternalValue("a", 4), true},
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{InternalValue("m", 10), false},
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{InternalValue("m", 9), true},
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{InternalValue("x", 10), false},
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{InternalValue("x", 9), false},
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{InternalValue("x", 5), true},
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{InternalValue("z", 9), false}});
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VerifyIsRangeOverlapped(&range_del_agg, {{"", "_", false},
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{"_", "a", true},
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{"a", "n", true},
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{"l", "x", true},
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{"w", "z", true},
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{"zzz", "zz", false},
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{"zz", "zzz", false}});
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}
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TEST_F(RangeDelAggregatorV2Test, MultipleTruncatedItersInAggregatorSameLevel) {
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auto fragment_lists = MakeFragmentedTombstoneLists(
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{{{"a", "z", 10}}, {{"a", "z", 10}}, {{"a", "z", 10}}});
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std::vector<std::pair<InternalKey, InternalKey>> iter_bounds = {
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{InternalKey("a", 4, kTypeValue),
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InternalKey("m", kMaxSequenceNumber, kTypeRangeDeletion)},
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{InternalKey("m", 20, kTypeValue),
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InternalKey("x", kMaxSequenceNumber, kTypeRangeDeletion)},
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{InternalKey("x", 5, kTypeValue), InternalKey("zz", 30, kTypeValue)}};
|
|
|
|
RangeDelAggregatorV2 range_del_agg(&bytewise_icmp, 19);
|
|
|
|
auto add_iter_to_agg = [&](size_t i) {
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|
std::unique_ptr<FragmentedRangeTombstoneIterator> input_iter(
|
|
new FragmentedRangeTombstoneIterator(fragment_lists[i].get(),
|
|
19 /* snapshot */, bytewise_icmp));
|
|
range_del_agg.AddTombstones(std::move(input_iter), &iter_bounds[i].first,
|
|
&iter_bounds[i].second);
|
|
};
|
|
|
|
add_iter_to_agg(0);
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|
VerifyShouldDelete(&range_del_agg, {{InternalValue("a", 10), false},
|
|
{InternalValue("a", 9), false},
|
|
{InternalValue("a", 4), true}});
|
|
|
|
add_iter_to_agg(1);
|
|
VerifyShouldDelete(&range_del_agg, {{InternalValue("m", 10), false},
|
|
{InternalValue("m", 9), true}});
|
|
|
|
add_iter_to_agg(2);
|
|
VerifyShouldDelete(&range_del_agg, {{InternalValue("x", 10), false},
|
|
{InternalValue("x", 9), false},
|
|
{InternalValue("x", 5), true},
|
|
{InternalValue("z", 9), false}});
|
|
|
|
VerifyIsRangeOverlapped(&range_del_agg, {{"", "_", false},
|
|
{"_", "a", true},
|
|
{"a", "n", true},
|
|
{"l", "x", true},
|
|
{"w", "z", true},
|
|
{"zzz", "zz", false},
|
|
{"zz", "zzz", false}});
|
|
}
|
|
|
|
} // namespace rocksdb
|
|
|
|
int main(int argc, char** argv) {
|
|
::testing::InitGoogleTest(&argc, argv);
|
|
return RUN_ALL_TESTS();
|
|
}
|