eb30ecb6a0
Summary: Adds a commit log garbage collector, which clears old transactions from the commit log Reviewers: florijan Reviewed By: florijan Subscribers: pullbot Differential Revision: https://phabricator.memgraph.io/D1310
79 lines
2.6 KiB
C++
79 lines
2.6 KiB
C++
#include <gtest/gtest.h>
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#include "distributed_common.hpp"
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TEST_F(DistributedGraphDbTest, GarbageCollect) {
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database::GraphDbAccessor dba{master()};
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auto tx = dba.transaction_id();
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dba.Commit();
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// Create multiple transactions so that the commit log can be cleared
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for (int i = 0; i < tx::CommitLog::kBitsetBlockSize; ++i) {
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database::GraphDbAccessor dba{master()};
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}
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master().CollectGarbage();
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worker(1).CollectGarbage();
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worker(2).CollectGarbage();
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EXPECT_EQ(master().tx_engine().Info(tx).is_committed(), true);
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database::GraphDbAccessor dba2{master()};
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auto tx_last = dba2.transaction_id();
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dba2.Commit();
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worker(1).CollectGarbage();
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worker(2).CollectGarbage();
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master().CollectGarbage();
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EXPECT_DEATH(master().tx_engine().Info(tx), "chunk is nullptr");
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EXPECT_DEATH(worker(1).tx_engine().Info(tx), "chunk is nullptr");
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EXPECT_DEATH(worker(2).tx_engine().Info(tx), "chunk is nullptr");
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EXPECT_EQ(master().tx_engine().Info(tx_last).is_committed(), true);
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EXPECT_EQ(worker(1).tx_engine().Info(tx_last).is_committed(), true);
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EXPECT_EQ(worker(2).tx_engine().Info(tx_last).is_committed(), true);
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}
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TEST_F(DistributedGraphDbTest, GarbageCollectBlocked) {
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database::GraphDbAccessor dba{master()};
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auto tx = dba.transaction_id();
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dba.Commit();
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// Block garbage collection because this is a still alive transaction on the
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// worker
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database::GraphDbAccessor dba3{worker(1)};
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// Create multiple transactions so that the commit log can be cleared
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for (int i = 0; i < tx::CommitLog::kBitsetBlockSize; ++i) {
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database::GraphDbAccessor dba{master()};
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}
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// Query for a large id so that the commit log new block is created
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master().tx_engine().Info(tx::CommitLog::kBitsetBlockSize);
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master().CollectGarbage();
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worker(1).CollectGarbage();
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worker(2).CollectGarbage();
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EXPECT_EQ(master().tx_engine().Info(tx).is_committed(), true);
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database::GraphDbAccessor dba2{master()};
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auto tx_last = dba2.transaction_id();
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dba2.Commit();
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worker(1).CollectGarbage();
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worker(2).CollectGarbage();
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master().CollectGarbage();
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EXPECT_EQ(master().tx_engine().Info(tx).is_committed(), true);
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EXPECT_EQ(worker(1).tx_engine().Info(tx).is_committed(), true);
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EXPECT_EQ(worker(2).tx_engine().Info(tx).is_committed(), true);
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EXPECT_EQ(master().tx_engine().Info(tx_last).is_committed(), true);
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EXPECT_EQ(worker(1).tx_engine().Info(tx_last).is_committed(), true);
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EXPECT_EQ(worker(2).tx_engine().Info(tx_last).is_committed(), true);
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}
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int main(int argc, char **argv) {
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::testing::FLAGS_gtest_death_test_style = "threadsafe";
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::testing::InitGoogleTest(&argc, argv);
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return RUN_ALL_TESTS();
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}
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