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
463 lines
20 KiB
C++
463 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_tombstone_fragmenter.h"
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#include "db/db_test_util.h"
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#include "rocksdb/comparator.h"
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#include "util/testutil.h"
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namespace rocksdb {
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class RangeTombstoneFragmenterTest : 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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void VerifyFragmentedRangeDels(
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FragmentedRangeTombstoneIterator* iter,
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const std::vector<RangeTombstone>& expected_tombstones) {
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iter->SeekToFirst();
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for (size_t i = 0; i < expected_tombstones.size() && iter->Valid();
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i++, iter->Next()) {
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EXPECT_EQ(iter->start_key(), expected_tombstones[i].start_key_);
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EXPECT_EQ(iter->value(), expected_tombstones[i].end_key_);
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EXPECT_EQ(iter->seq(), expected_tombstones[i].seq_);
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}
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EXPECT_FALSE(iter->Valid());
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}
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void VerifyVisibleTombstones(
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FragmentedRangeTombstoneIterator* iter,
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const std::vector<RangeTombstone>& expected_tombstones) {
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iter->SeekToTopFirst();
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for (size_t i = 0; i < expected_tombstones.size() && iter->Valid();
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i++, iter->TopNext()) {
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EXPECT_EQ(iter->start_key(), expected_tombstones[i].start_key_);
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EXPECT_EQ(iter->value(), expected_tombstones[i].end_key_);
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EXPECT_EQ(iter->seq(), expected_tombstones[i].seq_);
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}
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EXPECT_FALSE(iter->Valid());
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}
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struct SeekTestCase {
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Slice seek_target;
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RangeTombstone expected_position;
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bool out_of_range;
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};
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void VerifySeek(FragmentedRangeTombstoneIterator* iter,
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const std::vector<SeekTestCase>& cases) {
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for (const auto& testcase : cases) {
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iter->Seek(testcase.seek_target);
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if (testcase.out_of_range) {
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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(testcase.expected_position.start_key_, iter->start_key());
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EXPECT_EQ(testcase.expected_position.end_key_, iter->value());
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EXPECT_EQ(testcase.expected_position.seq_, iter->seq());
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}
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}
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}
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void VerifySeekForPrev(FragmentedRangeTombstoneIterator* iter,
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const std::vector<SeekTestCase>& cases) {
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for (const auto& testcase : cases) {
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iter->SeekForPrev(testcase.seek_target);
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if (testcase.out_of_range) {
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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(testcase.expected_position.start_key_, iter->start_key());
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EXPECT_EQ(testcase.expected_position.end_key_, iter->value());
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EXPECT_EQ(testcase.expected_position.seq_, iter->seq());
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}
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}
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}
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struct MaxCoveringTombstoneSeqnumTestCase {
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Slice user_key;
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SequenceNumber result;
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};
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void VerifyMaxCoveringTombstoneSeqnum(
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FragmentedRangeTombstoneIterator* iter,
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const std::vector<MaxCoveringTombstoneSeqnumTestCase>& cases) {
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for (const auto& testcase : cases) {
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EXPECT_EQ(testcase.result,
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iter->MaxCoveringTombstoneSeqnum(testcase.user_key));
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}
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}
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} // anonymous namespace
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TEST_F(RangeTombstoneFragmenterTest, NonOverlappingTombstones) {
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auto range_del_iter = MakeRangeDelIter({{"a", "b", 10}, {"c", "d", 5}});
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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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FragmentedRangeTombstoneIterator iter(&fragment_list, kMaxSequenceNumber,
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bytewise_icmp);
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VerifyFragmentedRangeDels(&iter, {{"a", "b", 10}, {"c", "d", 5}});
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VerifyMaxCoveringTombstoneSeqnum(&iter,
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{{"", 0}, {"a", 10}, {"b", 0}, {"c", 5}});
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}
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TEST_F(RangeTombstoneFragmenterTest, OverlappingTombstones) {
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auto range_del_iter = MakeRangeDelIter({{"a", "e", 10}, {"c", "g", 15}});
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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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FragmentedRangeTombstoneIterator iter(&fragment_list, kMaxSequenceNumber,
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bytewise_icmp);
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VerifyFragmentedRangeDels(&iter,
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{{"a", "c", 10}, {"c", "e", 15}, {"e", "g", 15}});
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VerifyMaxCoveringTombstoneSeqnum(&iter,
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{{"a", 10}, {"c", 15}, {"e", 15}, {"g", 0}});
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}
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TEST_F(RangeTombstoneFragmenterTest, ContiguousTombstones) {
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auto range_del_iter = MakeRangeDelIter(
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{{"a", "c", 10}, {"c", "e", 20}, {"c", "e", 5}, {"e", "g", 15}});
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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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FragmentedRangeTombstoneIterator iter(&fragment_list, kMaxSequenceNumber,
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bytewise_icmp);
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VerifyFragmentedRangeDels(&iter,
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{{"a", "c", 10}, {"c", "e", 20}, {"e", "g", 15}});
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VerifyMaxCoveringTombstoneSeqnum(&iter,
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{{"a", 10}, {"c", 20}, {"e", 15}, {"g", 0}});
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}
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TEST_F(RangeTombstoneFragmenterTest, RepeatedStartAndEndKey) {
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auto range_del_iter =
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MakeRangeDelIter({{"a", "c", 10}, {"a", "c", 7}, {"a", "c", 3}});
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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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FragmentedRangeTombstoneIterator iter(&fragment_list, kMaxSequenceNumber,
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bytewise_icmp);
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VerifyFragmentedRangeDels(&iter, {{"a", "c", 10}});
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VerifyMaxCoveringTombstoneSeqnum(&iter, {{"a", 10}, {"b", 10}, {"c", 0}});
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}
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TEST_F(RangeTombstoneFragmenterTest, RepeatedStartKeyDifferentEndKeys) {
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auto range_del_iter =
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MakeRangeDelIter({{"a", "e", 10}, {"a", "g", 7}, {"a", "c", 3}});
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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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FragmentedRangeTombstoneIterator iter(&fragment_list, kMaxSequenceNumber,
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bytewise_icmp);
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VerifyFragmentedRangeDels(&iter,
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{{"a", "c", 10}, {"c", "e", 10}, {"e", "g", 7}});
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VerifyMaxCoveringTombstoneSeqnum(&iter,
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{{"a", 10}, {"c", 10}, {"e", 7}, {"g", 0}});
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}
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TEST_F(RangeTombstoneFragmenterTest, RepeatedStartKeyMixedEndKeys) {
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auto range_del_iter = MakeRangeDelIter({{"a", "c", 30},
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{"a", "g", 20},
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{"a", "e", 10},
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{"a", "g", 7},
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{"a", "c", 3}});
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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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FragmentedRangeTombstoneIterator iter(&fragment_list, kMaxSequenceNumber,
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bytewise_icmp);
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VerifyFragmentedRangeDels(&iter,
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{{"a", "c", 30}, {"c", "e", 20}, {"e", "g", 20}});
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VerifyMaxCoveringTombstoneSeqnum(&iter,
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{{"a", 30}, {"c", 20}, {"e", 20}, {"g", 0}});
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}
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TEST_F(RangeTombstoneFragmenterTest, OverlapAndRepeatedStartKey) {
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auto range_del_iter = MakeRangeDelIter({{"a", "e", 10},
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{"c", "g", 8},
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{"c", "i", 6},
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{"j", "n", 4},
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{"j", "l", 2}});
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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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FragmentedRangeTombstoneIterator iter(&fragment_list, kMaxSequenceNumber,
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bytewise_icmp);
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VerifyFragmentedRangeDels(&iter, {{"a", "c", 10},
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{"c", "e", 10},
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{"e", "g", 8},
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{"g", "i", 6},
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{"j", "l", 4},
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{"l", "n", 4}});
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VerifyMaxCoveringTombstoneSeqnum(
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&iter, {{"a", 10}, {"c", 10}, {"e", 8}, {"i", 0}, {"j", 4}, {"m", 4}});
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}
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TEST_F(RangeTombstoneFragmenterTest, OverlapAndRepeatedStartKeyWithSnapshot) {
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auto range_del_iter = MakeRangeDelIter({{"a", "e", 10},
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{"c", "g", 8},
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{"c", "i", 6},
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{"j", "n", 4},
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{"j", "l", 2}});
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FragmentedRangeTombstoneList fragment_list(
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std::move(range_del_iter), bytewise_icmp, true /* one_time_use */, 9);
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FragmentedRangeTombstoneIterator iter(&fragment_list, 9 /* snapshot */,
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bytewise_icmp);
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VerifyFragmentedRangeDels(
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&iter, {{"c", "g", 8}, {"g", "i", 6}, {"j", "l", 4}, {"l", "n", 4}});
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VerifyMaxCoveringTombstoneSeqnum(
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&iter, {{"a", 0}, {"c", 8}, {"e", 8}, {"i", 0}, {"j", 4}, {"m", 4}});
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}
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TEST_F(RangeTombstoneFragmenterTest, OverlapAndRepeatedStartKeyUnordered) {
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auto range_del_iter = MakeRangeDelIter({{"a", "e", 10},
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{"j", "n", 4},
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{"c", "i", 6},
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{"c", "g", 8},
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{"j", "l", 2}});
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FragmentedRangeTombstoneList fragment_list(
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std::move(range_del_iter), bytewise_icmp, true /* one_time_use */, 9);
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FragmentedRangeTombstoneIterator iter(&fragment_list, 9 /* snapshot */,
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bytewise_icmp);
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VerifyFragmentedRangeDels(
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&iter, {{"c", "g", 8}, {"g", "i", 6}, {"j", "l", 4}, {"l", "n", 4}});
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VerifyMaxCoveringTombstoneSeqnum(
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&iter, {{"a", 0}, {"c", 8}, {"e", 8}, {"i", 0}, {"j", 4}, {"m", 4}});
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}
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TEST_F(RangeTombstoneFragmenterTest, OverlapAndRepeatedStartKeyMultiUse) {
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auto range_del_iter = MakeRangeDelIter({{"a", "e", 10},
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{"c", "g", 8},
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{"c", "i", 6},
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{"j", "n", 4},
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{"j", "l", 2}});
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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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FragmentedRangeTombstoneIterator iter1(&fragment_list, kMaxSequenceNumber,
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bytewise_icmp);
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FragmentedRangeTombstoneIterator iter2(&fragment_list, 9 /* snapshot */,
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bytewise_icmp);
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FragmentedRangeTombstoneIterator iter3(&fragment_list, 7 /* snapshot */,
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bytewise_icmp);
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FragmentedRangeTombstoneIterator iter4(&fragment_list, 5 /* snapshot */,
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bytewise_icmp);
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FragmentedRangeTombstoneIterator iter5(&fragment_list, 3 /* snapshot */,
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bytewise_icmp);
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for (auto* iter : {&iter1, &iter2, &iter3, &iter4, &iter5}) {
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VerifyFragmentedRangeDels(iter, {{"a", "c", 10},
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{"c", "e", 10},
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{"c", "e", 8},
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{"c", "e", 6},
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{"e", "g", 8},
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{"e", "g", 6},
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{"g", "i", 6},
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{"j", "l", 4},
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{"j", "l", 2},
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{"l", "n", 4}});
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}
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VerifyVisibleTombstones(&iter1, {{"a", "c", 10},
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{"c", "e", 10},
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{"e", "g", 8},
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{"g", "i", 6},
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{"j", "l", 4},
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{"l", "n", 4}});
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VerifyMaxCoveringTombstoneSeqnum(
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&iter1, {{"a", 10}, {"c", 10}, {"e", 8}, {"i", 0}, {"j", 4}, {"m", 4}});
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VerifyVisibleTombstones(&iter2, {{"c", "e", 8},
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{"e", "g", 8},
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{"g", "i", 6},
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{"j", "l", 4},
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{"l", "n", 4}});
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VerifyMaxCoveringTombstoneSeqnum(
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&iter2, {{"a", 0}, {"c", 8}, {"e", 8}, {"i", 0}, {"j", 4}, {"m", 4}});
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VerifyVisibleTombstones(&iter3, {{"c", "e", 6},
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{"e", "g", 6},
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{"g", "i", 6},
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{"j", "l", 4},
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{"l", "n", 4}});
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VerifyMaxCoveringTombstoneSeqnum(
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&iter3, {{"a", 0}, {"c", 6}, {"e", 6}, {"i", 0}, {"j", 4}, {"m", 4}});
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VerifyVisibleTombstones(&iter4, {{"j", "l", 4}, {"l", "n", 4}});
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VerifyMaxCoveringTombstoneSeqnum(
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&iter4, {{"a", 0}, {"c", 0}, {"e", 0}, {"i", 0}, {"j", 4}, {"m", 4}});
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VerifyVisibleTombstones(&iter5, {{"j", "l", 2}});
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VerifyMaxCoveringTombstoneSeqnum(
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&iter5, {{"a", 0}, {"c", 0}, {"e", 0}, {"i", 0}, {"j", 2}, {"m", 0}});
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}
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TEST_F(RangeTombstoneFragmenterTest, SeekStartKey) {
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// Same tombstones as OverlapAndRepeatedStartKey.
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auto range_del_iter = MakeRangeDelIter({{"a", "e", 10},
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{"c", "g", 8},
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{"c", "i", 6},
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{"j", "n", 4},
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{"j", "l", 2}});
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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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FragmentedRangeTombstoneIterator iter1(&fragment_list, kMaxSequenceNumber,
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bytewise_icmp);
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VerifySeek(
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&iter1,
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{{"a", {"a", "c", 10}}, {"e", {"e", "g", 8}}, {"l", {"l", "n", 4}}});
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VerifySeekForPrev(
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&iter1,
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{{"a", {"a", "c", 10}}, {"e", {"e", "g", 8}}, {"l", {"l", "n", 4}}});
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FragmentedRangeTombstoneIterator iter2(&fragment_list, 3 /* snapshot */,
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bytewise_icmp);
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VerifySeek(&iter2, {{"a", {"j", "l", 2}},
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{"e", {"j", "l", 2}},
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{"l", {}, true /* out of range */}});
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VerifySeekForPrev(&iter2, {{"a", {}, true /* out of range */},
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{"e", {}, true /* out of range */},
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{"l", {"j", "l", 2}}});
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}
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TEST_F(RangeTombstoneFragmenterTest, SeekCovered) {
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// Same tombstones as OverlapAndRepeatedStartKey.
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auto range_del_iter = MakeRangeDelIter({{"a", "e", 10},
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{"c", "g", 8},
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{"c", "i", 6},
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{"j", "n", 4},
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{"j", "l", 2}});
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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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FragmentedRangeTombstoneIterator iter1(&fragment_list, kMaxSequenceNumber,
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bytewise_icmp);
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VerifySeek(
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&iter1,
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{{"b", {"a", "c", 10}}, {"f", {"e", "g", 8}}, {"m", {"l", "n", 4}}});
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VerifySeekForPrev(
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&iter1,
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{{"b", {"a", "c", 10}}, {"f", {"e", "g", 8}}, {"m", {"l", "n", 4}}});
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FragmentedRangeTombstoneIterator iter2(&fragment_list, 3 /* snapshot */,
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bytewise_icmp);
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VerifySeek(&iter2, {{"b", {"j", "l", 2}},
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{"f", {"j", "l", 2}},
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{"m", {}, true /* out of range */}});
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VerifySeekForPrev(&iter2, {{"b", {}, true /* out of range */},
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{"f", {}, true /* out of range */},
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{"m", {"j", "l", 2}}});
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}
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TEST_F(RangeTombstoneFragmenterTest, SeekEndKey) {
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// Same tombstones as OverlapAndRepeatedStartKey.
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auto range_del_iter = MakeRangeDelIter({{"a", "e", 10},
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{"c", "g", 8},
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{"c", "i", 6},
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{"j", "n", 4},
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{"j", "l", 2}});
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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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FragmentedRangeTombstoneIterator iter1(&fragment_list, kMaxSequenceNumber,
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bytewise_icmp);
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VerifySeek(&iter1, {{"c", {"c", "e", 10}},
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{"g", {"g", "i", 6}},
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{"i", {"j", "l", 4}},
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{"n", {}, true /* out of range */}});
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VerifySeekForPrev(&iter1, {{"c", {"c", "e", 10}},
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{"g", {"g", "i", 6}},
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{"i", {"g", "i", 6}},
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{"n", {"l", "n", 4}}});
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FragmentedRangeTombstoneIterator iter2(&fragment_list, 3 /* snapshot */,
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bytewise_icmp);
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VerifySeek(&iter2, {{"c", {"j", "l", 2}},
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{"g", {"j", "l", 2}},
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{"i", {"j", "l", 2}},
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{"n", {}, true /* out of range */}});
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VerifySeekForPrev(&iter2, {{"c", {}, true /* out of range */},
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{"g", {}, true /* out of range */},
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{"i", {}, true /* out of range */},
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{"n", {"j", "l", 2}}});
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}
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TEST_F(RangeTombstoneFragmenterTest, SeekOutOfBounds) {
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// Same tombstones as OverlapAndRepeatedStartKey.
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auto range_del_iter = MakeRangeDelIter({{"a", "e", 10},
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{"c", "g", 8},
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{"c", "i", 6},
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{"j", "n", 4},
|
|
{"j", "l", 2}});
|
|
|
|
FragmentedRangeTombstoneList fragment_list(
|
|
std::move(range_del_iter), bytewise_icmp, false /* one_time_use */);
|
|
|
|
FragmentedRangeTombstoneIterator iter(&fragment_list, kMaxSequenceNumber,
|
|
bytewise_icmp);
|
|
VerifySeek(&iter, {{"", {"a", "c", 10}}, {"z", {}, true /* out of range */}});
|
|
VerifySeekForPrev(&iter,
|
|
{{"", {}, true /* out of range */}, {"z", {"l", "n", 4}}});
|
|
}
|
|
|
|
TEST_F(RangeTombstoneFragmenterTest, SeekOneTimeUse) {
|
|
// Same tombstones as OverlapAndRepeatedStartKey.
|
|
auto range_del_iter = MakeRangeDelIter({{"a", "e", 10},
|
|
{"c", "g", 8},
|
|
{"c", "i", 6},
|
|
{"j", "n", 4},
|
|
{"j", "l", 2}});
|
|
|
|
FragmentedRangeTombstoneList fragment_list(
|
|
std::move(range_del_iter), bytewise_icmp, true /* one_time_use */);
|
|
|
|
FragmentedRangeTombstoneIterator iter1(&fragment_list, kMaxSequenceNumber,
|
|
bytewise_icmp);
|
|
VerifySeek(
|
|
&iter1,
|
|
{{"a", {"a", "c", 10}}, {"e", {"e", "g", 8}}, {"l", {"l", "n", 4}}});
|
|
VerifySeekForPrev(
|
|
&iter1,
|
|
{{"a", {"a", "c", 10}}, {"e", {"e", "g", 8}}, {"l", {"l", "n", 4}}});
|
|
|
|
// No tombstone fragments exist at this snapshot because they were dropped
|
|
// when the list was created.
|
|
FragmentedRangeTombstoneIterator iter2(&fragment_list, 3 /* snapshot */,
|
|
bytewise_icmp);
|
|
VerifySeek(&iter2, {{"a", {}, true /* out of range */},
|
|
{"e", {}, true /* out of range */},
|
|
{"l", {}, true /* out of range */}});
|
|
VerifySeekForPrev(&iter2, {{"a", {}, true /* out of range */},
|
|
{"e", {}, true /* out of range */},
|
|
{"l", {}, true /* out of range */}});
|
|
}
|
|
|
|
} // namespace rocksdb
|
|
|
|
int main(int argc, char** argv) {
|
|
::testing::InitGoogleTest(&argc, argv);
|
|
return RUN_ALL_TESTS();
|
|
}
|