Examples with PhysicalLogFiles org.neo4j.kernel.impl.transaction.log.PhysicalLogFiles used on opensource projects

Example 21 with PhysicalLogFiles

use of org.neo4j.kernel.impl.transaction.log.PhysicalLogFiles in project neo4j by neo4j.

the class ReadReplicaReplicationIT method shouldBeAbleToPullTxAfterHavingDownloadedANewStoreAfterPruning.

@Test
public void shouldBeAbleToPullTxAfterHavingDownloadedANewStoreAfterPruning() throws Exception {
    // given
    Map<String, String> params = stringMap(GraphDatabaseSettings.keep_logical_logs.name(), "keep_none", GraphDatabaseSettings.logical_log_rotation_threshold.name(), "1M", GraphDatabaseSettings.check_point_interval_time.name(), "100ms");
    Cluster cluster = clusterRule.withSharedCoreParams(params).startCluster();
    cluster.coreTx((db, tx) -> {
        createData(db, 10);
        tx.success();
    });
    awaitEx(() -> readReplicasUpToDateAsTheLeader(cluster.awaitLeader(), cluster.readReplicas()), 1, TimeUnit.MINUTES);
    ReadReplica readReplica = cluster.getReadReplicaById(0);
    long highestReadReplicaLogVersion = physicalLogFiles(readReplica).getHighestLogVersion();
    readReplica.shutdown();
    CoreClusterMember core;
    do {
        core = cluster.coreTx((db, tx) -> {
            createData(db, 1_000);
            tx.success();
        });
    } while (physicalLogFiles(core).getLowestLogVersion() <= highestReadReplicaLogVersion);
    readReplica.start();
    awaitEx(() -> readReplicasUpToDateAsTheLeader(cluster.awaitLeader(), cluster.readReplicas()), 1, TimeUnit.MINUTES);
    // when
    cluster.coreTx((db, tx) -> {
        createData(db, 10);
        tx.success();
    });
    // then
    assertEventually("The read replica has the same data as the core members", () -> DbRepresentation.of(readReplica.database()), equalTo(DbRepresentation.of(cluster.awaitLeader().database())), 10, TimeUnit.SECONDS);
}

Example 22 with PhysicalLogFiles

use of org.neo4j.kernel.impl.transaction.log.PhysicalLogFiles in project neo4j by neo4j.

the class TransactionLogRecoveryIT method writePartialTx.

private void writePartialTx(File storeDir) throws IOException {
    PhysicalLogFiles logFiles = new PhysicalLogFiles(storeDir, fs);
    ReadOnlyLogVersionRepository logVersionRepository = new ReadOnlyLogVersionRepository(pageCache.getPageCache(fs), storeDir);
    ReadOnlyTransactionIdStore txIdStore = new ReadOnlyTransactionIdStore(pageCache.getPageCache(fs), storeDir);
    PhysicalLogFile logFile = new PhysicalLogFile(fs, logFiles, Long.MAX_VALUE, /*don't rotate*/
    txIdStore::getLastCommittedTransactionId, logVersionRepository, new Monitors().newMonitor(PhysicalLogFile.Monitor.class), new LogHeaderCache(10));
    try (Lifespan ignored = new Lifespan(logFile)) {
        LogEntryWriter writer = new LogEntryWriter(logFile.getWriter());
        writer.writeStartEntry(0, 0, 0x123456789ABCDEFL, txIdStore.getLastCommittedTransactionId() + 1, new byte[] { 0 });
    }
}

Example 23 with PhysicalLogFiles

use of org.neo4j.kernel.impl.transaction.log.PhysicalLogFiles in project neo4j by neo4j.

the class TransactionLogCatchUpWriterTest method verifyTransactionsInLog.

private void verifyTransactionsInLog(long fromTxId, long endTxId) throws IOException {
    long expectedTxId = fromTxId;
    PhysicalLogFiles logFiles = new PhysicalLogFiles(storeDir, fs);
    LogVersionedStoreChannel versionedStoreChannel = PhysicalLogFile.openForVersion(logFiles, fs, 0, false);
    try (ReadableLogChannel channel = new ReadAheadLogChannel(versionedStoreChannel, LogVersionBridge.NO_MORE_CHANNELS, 1024)) {
        try (PhysicalTransactionCursor<ReadableLogChannel> txCursor = new PhysicalTransactionCursor<>(channel, new VersionAwareLogEntryReader<>())) {
            while (txCursor.next()) {
                CommittedTransactionRepresentation tx = txCursor.get();
                long txId = tx.getCommitEntry().getTxId();
                assertThat(expectedTxId, lessThanOrEqualTo(endTxId));
                assertEquals(expectedTxId, txId);
                expectedTxId++;
            }
        }
    }
}

Example 24 with PhysicalLogFiles

use of org.neo4j.kernel.impl.transaction.log.PhysicalLogFiles in project neo4j by neo4j.

the class StoreCopyClient method writeTransactionsToActiveLogFile.

private void writeTransactionsToActiveLogFile(File tempStoreDir, Response<?> response) throws Exception {
    LifeSupport life = new LifeSupport();
    try {
        // Start the log and appender
        PhysicalLogFiles logFiles = new PhysicalLogFiles(tempStoreDir, fs);
        LogHeaderCache logHeaderCache = new LogHeaderCache(10);
        ReadOnlyLogVersionRepository logVersionRepository = new ReadOnlyLogVersionRepository(pageCache, tempStoreDir);
        ReadOnlyTransactionIdStore readOnlyTransactionIdStore = new ReadOnlyTransactionIdStore(pageCache, tempStoreDir);
        LogFile logFile = life.add(new PhysicalLogFile(fs, logFiles, Long.MAX_VALUE, /*don't rotate*/
        readOnlyTransactionIdStore::getLastCommittedTransactionId, logVersionRepository, new Monitors().newMonitor(PhysicalLogFile.Monitor.class), logHeaderCache));
        life.start();
        // Just write all transactions to the active log version. Remember that this is after a store copy
        // where there are no logs, and the transaction stream we're about to write will probably contain
        // transactions that goes some time back, before the last committed transaction id. So we cannot
        // use a TransactionAppender, since it has checks for which transactions one can append.
        FlushableChannel channel = logFile.getWriter();
        final TransactionLogWriter writer = new TransactionLogWriter(new LogEntryWriter(channel));
        final AtomicLong firstTxId = new AtomicLong(BASE_TX_ID);
        response.accept(new Response.Handler() {

            @Override
            public void obligation(long txId) throws IOException {
                throw new UnsupportedOperationException("Shouldn't be called");
            }

            @Override
            public Visitor<CommittedTransactionRepresentation, Exception> transactions() {
                return transaction -> {
                    long txId = transaction.getCommitEntry().getTxId();
                    if (firstTxId.compareAndSet(BASE_TX_ID, txId)) {
                        monitor.startReceivingTransactions(txId);
                    }
                    writer.append(transaction.getTransactionRepresentation(), txId);
                    return false;
                };
            }
        });
        long endTxId = firstTxId.get();
        if (endTxId != BASE_TX_ID) {
            monitor.finishReceivingTransactions(endTxId);
        }
        long currentLogVersion = logVersionRepository.getCurrentLogVersion();
        writer.checkPoint(new LogPosition(currentLogVersion, LOG_HEADER_SIZE));
        // And since we write this manually we need to set the correct transaction id in the
        // header of the log that we just wrote.
        File currentLogFile = logFiles.getLogFileForVersion(currentLogVersion);
        writeLogHeader(fs, currentLogFile, currentLogVersion, max(BASE_TX_ID, endTxId - 1));
        if (!forensics) {
            // since we just create new log and put checkpoint into it with offset equals to
            // LOG_HEADER_SIZE we need to update last transaction offset to be equal to this newly defined max
            // offset otherwise next checkpoint that use last transaction offset will be created for non
            // existing offset that is in most of the cases bigger than new log size.
            // Recovery will treat that as last checkpoint and will not try to recover store till new
            // last closed transaction offset will not overcome old one. Till that happens it will be
            // impossible for recovery process to restore the store
            File neoStore = new File(tempStoreDir, MetaDataStore.DEFAULT_NAME);
            MetaDataStore.setRecord(pageCache, neoStore, MetaDataStore.Position.LAST_CLOSED_TRANSACTION_LOG_BYTE_OFFSET, LOG_HEADER_SIZE);
        }
    } finally {
        life.shutdown();
    }
}

Example 25 with PhysicalLogFiles

use of org.neo4j.kernel.impl.transaction.log.PhysicalLogFiles in project neo4j by neo4j.

the class TransactionLogCatchUpWriterTest method simulateStoreCopy.

private org.neo4j.kernel.impl.store.StoreId simulateStoreCopy() throws IOException {
    // create an empty store
    org.neo4j.kernel.impl.store.StoreId storeId;
    NeoStoreDataSource ds = dsRule.getDataSource(storeDir, fs, pageCache, emptyMap());
    try (Lifespan ignored = new Lifespan(ds)) {
        storeId = ds.getStoreId();
    }
    // we don't have log files after a store copy
    PhysicalLogFiles logFiles = new PhysicalLogFiles(storeDir, fsRule.get());
    logFiles.accept((file, version) -> file.delete());
    return storeId;
}