Examples with HashSkipListMemTableConfig org.rocksdb.HashSkipListMemTableConfig used on opensource projects

Example 1 with HashSkipListMemTableConfig

use of org.rocksdb.HashSkipListMemTableConfig in project Lealone-Plugins by lealone.

the class RocksDBTest method testRocksDB.

// 以下代码只用于学习RocksDB的用法
// 来源: https://github.com/facebook/rocksdb/blob/master/java/samples/src/main/java/RocksDBSample.java
// 
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// 
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
public static void testRocksDB() {
    final String db_path = TEST_DIR + File.separatorChar + "rocksdb";
    final String db_path_not_found = db_path + "_not_found";
    System.out.println("RocksDBSample");
    try (final Options options = new Options();
        final Filter bloomFilter = new BloomFilter(10);
        final ReadOptions readOptions = new ReadOptions().setFillCache(false);
        final Statistics stats = new Statistics();
        final RateLimiter rateLimiter = new RateLimiter(10000000, 10000, 10)) {
        try (final RocksDB db = RocksDB.open(options, db_path_not_found)) {
            assert (false);
        } catch (final RocksDBException e) {
            System.out.format("Caught the expected exception -- %s\n", e);
        }
        try {
            options.setCreateIfMissing(true).setStatistics(stats).setWriteBufferSize(8 * SizeUnit.KB).setMaxWriteBufferNumber(3).setMaxBackgroundCompactions(10).setCompressionType(CompressionType.SNAPPY_COMPRESSION).setCompactionStyle(CompactionStyle.UNIVERSAL);
        } catch (final IllegalArgumentException e) {
            assert (false);
        }
        assert (options.createIfMissing() == true);
        assert (options.writeBufferSize() == 8 * SizeUnit.KB);
        assert (options.maxWriteBufferNumber() == 3);
        assert (options.maxBackgroundCompactions() == 10);
        assert (options.compressionType() == CompressionType.SNAPPY_COMPRESSION);
        assert (options.compactionStyle() == CompactionStyle.UNIVERSAL);
        assert (options.memTableFactoryName().equals("SkipListFactory"));
        options.setMemTableConfig(new HashSkipListMemTableConfig().setHeight(4).setBranchingFactor(4).setBucketCount(2000000));
        assert (options.memTableFactoryName().equals("HashSkipListRepFactory"));
        options.setMemTableConfig(new HashLinkedListMemTableConfig().setBucketCount(100000));
        assert (options.memTableFactoryName().equals("HashLinkedListRepFactory"));
        options.setMemTableConfig(new VectorMemTableConfig().setReservedSize(10000));
        assert (options.memTableFactoryName().equals("VectorRepFactory"));
        options.setMemTableConfig(new SkipListMemTableConfig());
        assert (options.memTableFactoryName().equals("SkipListFactory"));
        options.setTableFormatConfig(new PlainTableConfig());
        // Plain-Table requires mmap read
        options.setAllowMmapReads(true);
        assert (options.tableFactoryName().equals("PlainTable"));
        options.setRateLimiter(rateLimiter);
        final BlockBasedTableConfig table_options = new BlockBasedTableConfig();
        table_options.setBlockCacheSize(64 * SizeUnit.KB).setFilter(bloomFilter).setCacheNumShardBits(6).setBlockSizeDeviation(5).setBlockRestartInterval(10).setCacheIndexAndFilterBlocks(true).setHashIndexAllowCollision(false).setBlockCacheCompressedSize(64 * SizeUnit.KB).setBlockCacheCompressedNumShardBits(10);
        assert (table_options.blockCacheSize() == 64 * SizeUnit.KB);
        assert (table_options.cacheNumShardBits() == 6);
        assert (table_options.blockSizeDeviation() == 5);
        assert (table_options.blockRestartInterval() == 10);
        assert (table_options.cacheIndexAndFilterBlocks() == true);
        assert (table_options.hashIndexAllowCollision() == false);
        assert (table_options.blockCacheCompressedSize() == 64 * SizeUnit.KB);
        assert (table_options.blockCacheCompressedNumShardBits() == 10);
        options.setTableFormatConfig(table_options);
        assert (options.tableFactoryName().equals("BlockBasedTable"));
        try (final RocksDB db = RocksDB.open(options, db_path)) {
            db.put("hello".getBytes(), "world".getBytes());
            final byte[] value = db.get("hello".getBytes());
            assert ("world".equals(new String(value)));
            final String str = db.getProperty("rocksdb.stats");
            assert (str != null && !str.equals(""));
        } catch (final RocksDBException e) {
            System.out.format("[ERROR] caught the unexpected exception -- %s\n", e);
            assert (false);
        }
        try (final RocksDB db = RocksDB.open(options, db_path)) {
            db.put("hello".getBytes(), "world".getBytes());
            byte[] value = db.get("hello".getBytes());
            System.out.format("Get('hello') = %s\n", new String(value));
            for (int i = 1; i <= 9; ++i) {
                for (int j = 1; j <= 9; ++j) {
                    db.put(String.format("%dx%d", i, j).getBytes(), String.format("%d", i * j).getBytes());
                }
            }
            for (int i = 1; i <= 9; ++i) {
                for (int j = 1; j <= 9; ++j) {
                    System.out.format("%s ", new String(db.get(String.format("%dx%d", i, j).getBytes())));
                }
                System.out.println("");
            }
            // write batch test
            try (final WriteOptions writeOpt = new WriteOptions()) {
                for (int i = 10; i <= 19; ++i) {
                    try (final WriteBatch batch = new WriteBatch()) {
                        for (int j = 10; j <= 19; ++j) {
                            batch.put(String.format("%dx%d", i, j).getBytes(), String.format("%d", i * j).getBytes());
                        }
                        db.write(writeOpt, batch);
                    }
                }
            }
            for (int i = 10; i <= 19; ++i) {
                for (int j = 10; j <= 19; ++j) {
                    assert (new String(db.get(String.format("%dx%d", i, j).getBytes())).equals(String.format("%d", i * j)));
                    System.out.format("%s ", new String(db.get(String.format("%dx%d", i, j).getBytes())));
                }
                System.out.println("");
            }
            value = db.get("1x1".getBytes());
            assert (value != null);
            value = db.get("world".getBytes());
            assert (value == null);
            value = db.get(readOptions, "world".getBytes());
            assert (value == null);
            final byte[] testKey = "asdf".getBytes();
            final byte[] testValue = "asdfghjkl;'?><MNBVCXZQWERTYUIOP{+_)(*&^%$#@".getBytes();
            db.put(testKey, testValue);
            byte[] testResult = db.get(testKey);
            assert (testResult != null);
            assert (Arrays.equals(testValue, testResult));
            assert (new String(testValue).equals(new String(testResult)));
            testResult = db.get(readOptions, testKey);
            assert (testResult != null);
            assert (Arrays.equals(testValue, testResult));
            assert (new String(testValue).equals(new String(testResult)));
            final byte[] insufficientArray = new byte[10];
            final byte[] enoughArray = new byte[50];
            int len;
            len = db.get(testKey, insufficientArray);
            assert (len > insufficientArray.length);
            len = db.get("asdfjkl;".getBytes(), enoughArray);
            assert (len == RocksDB.NOT_FOUND);
            len = db.get(testKey, enoughArray);
            assert (len == testValue.length);
            len = db.get(readOptions, testKey, insufficientArray);
            assert (len > insufficientArray.length);
            len = db.get(readOptions, "asdfjkl;".getBytes(), enoughArray);
            assert (len == RocksDB.NOT_FOUND);
            len = db.get(readOptions, testKey, enoughArray);
            assert (len == testValue.length);
            db.delete(testKey);
            len = db.get(testKey, enoughArray);
            assert (len == RocksDB.NOT_FOUND);
            // repeat the test with WriteOptions
            try (final WriteOptions writeOpts = new WriteOptions()) {
                writeOpts.setSync(true);
                writeOpts.setDisableWAL(true);
                db.put(writeOpts, testKey, testValue);
                len = db.get(testKey, enoughArray);
                assert (len == testValue.length);
                assert (new String(testValue).equals(new String(enoughArray, 0, len)));
            }
            try {
                for (final TickerType statsType : TickerType.values()) {
                    if (statsType != TickerType.TICKER_ENUM_MAX) {
                        stats.getTickerCount(statsType);
                    }
                }
                System.out.println("getTickerCount() passed.");
            } catch (final Exception e) {
                System.out.println("Failed in call to getTickerCount()");
                // Should never reach here.
                assert (false);
            }
            try {
                for (final HistogramType histogramType : HistogramType.values()) {
                    if (histogramType != HistogramType.HISTOGRAM_ENUM_MAX) {
                        stats.getHistogramData(histogramType);
                    }
                }
                System.out.println("getHistogramData() passed.");
            } catch (final Exception e) {
                System.out.println("Failed in call to getHistogramData()");
                // Should never reach here.
                assert (false);
            }
            try (final RocksIterator iterator = db.newIterator()) {
                boolean seekToFirstPassed = false;
                for (iterator.seekToFirst(); iterator.isValid(); iterator.next()) {
                    iterator.status();
                    assert (iterator.key() != null);
                    assert (iterator.value() != null);
                    seekToFirstPassed = true;
                }
                if (seekToFirstPassed) {
                    System.out.println("iterator seekToFirst tests passed.");
                }
                boolean seekToLastPassed = false;
                for (iterator.seekToLast(); iterator.isValid(); iterator.prev()) {
                    iterator.status();
                    assert (iterator.key() != null);
                    assert (iterator.value() != null);
                    seekToLastPassed = true;
                }
                if (seekToLastPassed) {
                    System.out.println("iterator seekToLastPassed tests passed.");
                }
                iterator.seekToFirst();
                iterator.seek(iterator.key());
                assert (iterator.key() != null);
                assert (iterator.value() != null);
                System.out.println("iterator seek test passed.");
            }
            System.out.println("iterator tests passed.");
            final List<byte[]> keys = new ArrayList<>();
            try (final RocksIterator iterator = db.newIterator()) {
                for (iterator.seekToLast(); iterator.isValid(); iterator.prev()) {
                    keys.add(iterator.key());
                }
            }
            Map<byte[], byte[]> values = db.multiGet(keys);
            assert (values.size() == keys.size());
            for (final byte[] value1 : values.values()) {
                assert (value1 != null);
            }
            values = db.multiGet(new ReadOptions(), keys);
            assert (values.size() == keys.size());
            for (final byte[] value1 : values.values()) {
                assert (value1 != null);
            }
        } catch (final RocksDBException e) {
            System.err.println(e);
        }
    }
}

Example 2 with HashSkipListMemTableConfig

use of org.rocksdb.HashSkipListMemTableConfig in project mercury by yellow013.

the class RocksDBSample method main.

@SuppressWarnings("deprecation")
public static void main(final String[] args) {
    // if (args.length < 1) {
    // System.out.println("usage: RocksDBSample db_path");
    // System.exit(-1);
    // }
    // args[0];
    final String db_path = dbPath;
    final String db_path_not_found = db_path + "_not_found";
    System.out.println("RocksDBSample");
    try (final Options options = new Options();
        final Filter bloomFilter = new BloomFilter(10);
        final ReadOptions readOptions = new ReadOptions().setFillCache(false);
        final Statistics stats = new Statistics();
        final RateLimiter rateLimiter = new RateLimiter(10000000, 10000, 10)) {
        try (final RocksDB db = RocksDB.open(options, db_path_not_found)) {
            assert (false);
        } catch (final RocksDBException e) {
            System.out.format("Caught the expected exception -- %s\n", e);
        }
        try {
            options.setCreateIfMissing(true).setStatistics(stats).setWriteBufferSize(8 * SizeUnit.KB).setMaxWriteBufferNumber(3).setMaxBackgroundCompactions(10).setCompressionType(CompressionType.SNAPPY_COMPRESSION).setCompactionStyle(CompactionStyle.UNIVERSAL);
        } catch (final IllegalArgumentException e) {
            assert (false);
        }
        assert (options.createIfMissing() == true);
        assert (options.writeBufferSize() == 8 * SizeUnit.KB);
        assert (options.maxWriteBufferNumber() == 3);
        assert (options.maxBackgroundCompactions() == 10);
        assert (options.compressionType() == CompressionType.SNAPPY_COMPRESSION);
        assert (options.compactionStyle() == CompactionStyle.UNIVERSAL);
        assert (options.memTableFactoryName().equals("SkipListFactory"));
        options.setMemTableConfig(new HashSkipListMemTableConfig().setHeight(4).setBranchingFactor(4).setBucketCount(2000000));
        assert (options.memTableFactoryName().equals("HashSkipListRepFactory"));
        options.setMemTableConfig(new HashLinkedListMemTableConfig().setBucketCount(100000));
        assert (options.memTableFactoryName().equals("HashLinkedListRepFactory"));
        options.setMemTableConfig(new VectorMemTableConfig().setReservedSize(10000));
        assert (options.memTableFactoryName().equals("VectorRepFactory"));
        options.setMemTableConfig(new SkipListMemTableConfig());
        assert (options.memTableFactoryName().equals("SkipListFactory"));
        options.setTableFormatConfig(new PlainTableConfig());
        // Plain-Table requires mmap read
        options.setAllowMmapReads(true);
        assert (options.tableFactoryName().equals("PlainTable"));
        options.setRateLimiter(rateLimiter);
        final BlockBasedTableConfig table_options = new BlockBasedTableConfig();
        table_options.setBlockCache(new LRUCache(512)).setFilterPolicy(bloomFilter).setBlockSizeDeviation(5).setBlockRestartInterval(10).setCacheIndexAndFilterBlocks(true).setBlockCacheCompressed(new LRUCache(512));
        // assert (table_options.cacheNumShardBits() == 6);
        assert (table_options.blockSizeDeviation() == 5);
        assert (table_options.blockRestartInterval() == 10);
        assert (table_options.cacheIndexAndFilterBlocks() == true);
        // assert (table_options.blockCacheCompressedSize() == 64 * SizeUnit.KB);
        // assert (table_options.blockCacheCompressedNumShardBits() == 10);
        options.setTableFormatConfig(table_options);
        assert (options.tableFactoryName().equals("BlockBasedTable"));
        try (final RocksDB db = RocksDB.open(options, db_path)) {
            db.put("hello".getBytes(), "world".getBytes());
            final byte[] value = db.get("hello".getBytes());
            assert ("world".equals(new String(value)));
            final String str = db.getProperty("rocksdb.stats");
            assert (str != null && !str.equals(""));
        } catch (final RocksDBException e) {
            System.out.format("[ERROR] caught the unexpected exception -- %s\n", e);
            assert (false);
        }
        try (final RocksDB db = RocksDB.open(options, db_path)) {
            db.put("hello".getBytes(), "world".getBytes());
            byte[] value = db.get("hello".getBytes());
            System.out.format("Get('hello') = %s\n", new String(value));
            for (int i = 1; i <= 9; ++i) {
                for (int j = 1; j <= 9; ++j) {
                    db.put(String.format("%dx%d", i, j).getBytes(), String.format("%d", i * j).getBytes());
                }
            }
            for (int i = 1; i <= 9; ++i) {
                for (int j = 1; j <= 9; ++j) {
                    System.out.format("%s ", new String(db.get(String.format("%dx%d", i, j).getBytes())));
                }
                System.out.println("");
            }
            // write batch test
            try (final WriteOptions writeOpt = new WriteOptions()) {
                for (int i = 10; i <= 19; ++i) {
                    try (final WriteBatch batch = new WriteBatch()) {
                        for (int j = 10; j <= 19; ++j) {
                            batch.put(String.format("%dx%d", i, j).getBytes(), String.format("%d", i * j).getBytes());
                        }
                        db.write(writeOpt, batch);
                    }
                }
            }
            for (int i = 10; i <= 19; ++i) {
                for (int j = 10; j <= 19; ++j) {
                    assert (new String(db.get(String.format("%dx%d", i, j).getBytes())).equals(String.format("%d", i * j)));
                    System.out.format("%s ", new String(db.get(String.format("%dx%d", i, j).getBytes())));
                }
                System.out.println("");
            }
            value = db.get("1x1".getBytes());
            assert (value != null);
            value = db.get("world".getBytes());
            assert (value == null);
            value = db.get(readOptions, "world".getBytes());
            assert (value == null);
            final byte[] testKey = "asdf".getBytes();
            final byte[] testValue = "asdfghjkl;'?><MNBVCXZQWERTYUIOP{+_)(*&^%$#@".getBytes();
            db.put(testKey, testValue);
            byte[] testResult = db.get(testKey);
            assert (testResult != null);
            assert (Arrays.equals(testValue, testResult));
            assert (new String(testValue).equals(new String(testResult)));
            testResult = db.get(readOptions, testKey);
            assert (testResult != null);
            assert (Arrays.equals(testValue, testResult));
            assert (new String(testValue).equals(new String(testResult)));
            final byte[] insufficientArray = new byte[10];
            final byte[] enoughArray = new byte[50];
            int len;
            len = db.get(testKey, insufficientArray);
            assert (len > insufficientArray.length);
            len = db.get("asdfjkl;".getBytes(), enoughArray);
            assert (len == RocksDB.NOT_FOUND);
            len = db.get(testKey, enoughArray);
            assert (len == testValue.length);
            len = db.get(readOptions, testKey, insufficientArray);
            assert (len > insufficientArray.length);
            len = db.get(readOptions, "asdfjkl;".getBytes(), enoughArray);
            assert (len == RocksDB.NOT_FOUND);
            len = db.get(readOptions, testKey, enoughArray);
            assert (len == testValue.length);
            db.delete(testKey);
            len = db.get(testKey, enoughArray);
            assert (len == RocksDB.NOT_FOUND);
            // repeat the test with WriteOptions
            try (final WriteOptions writeOpts = new WriteOptions()) {
                writeOpts.setSync(true);
                writeOpts.setDisableWAL(true);
                db.put(writeOpts, testKey, testValue);
                len = db.get(testKey, enoughArray);
                assert (len == testValue.length);
                assert (new String(testValue).equals(new String(enoughArray, 0, len)));
            }
            try {
                for (final TickerType statsType : TickerType.values()) {
                    if (statsType != TickerType.TICKER_ENUM_MAX) {
                        stats.getTickerCount(statsType);
                    }
                }
                System.out.println("getTickerCount() passed.");
            } catch (final Exception e) {
                System.out.println("Failed in call to getTickerCount()");
                // Should never reach here.
                assert (false);
            }
            try {
                for (final HistogramType histogramType : HistogramType.values()) {
                    if (histogramType != HistogramType.HISTOGRAM_ENUM_MAX) {
                        @SuppressWarnings("unused") HistogramData data = stats.getHistogramData(histogramType);
                    }
                }
                System.out.println("getHistogramData() passed.");
            } catch (final Exception e) {
                System.out.println("Failed in call to getHistogramData()");
                // Should never reach here.
                assert (false);
            }
            try (final RocksIterator iterator = db.newIterator()) {
                boolean seekToFirstPassed = false;
                for (iterator.seekToFirst(); iterator.isValid(); iterator.next()) {
                    iterator.status();
                    assert (iterator.key() != null);
                    assert (iterator.value() != null);
                    seekToFirstPassed = true;
                }
                if (seekToFirstPassed) {
                    System.out.println("iterator seekToFirst tests passed.");
                }
                boolean seekToLastPassed = false;
                for (iterator.seekToLast(); iterator.isValid(); iterator.prev()) {
                    iterator.status();
                    assert (iterator.key() != null);
                    assert (iterator.value() != null);
                    seekToLastPassed = true;
                }
                if (seekToLastPassed) {
                    System.out.println("iterator seekToLastPassed tests passed.");
                }
                iterator.seekToFirst();
                iterator.seek(iterator.key());
                assert (iterator.key() != null);
                assert (iterator.value() != null);
                System.out.println("iterator seek test passed.");
            }
            System.out.println("iterator tests passed.");
            final List<byte[]> keys = new ArrayList<>();
            try (final RocksIterator iterator = db.newIterator()) {
                for (iterator.seekToLast(); iterator.isValid(); iterator.prev()) {
                    keys.add(iterator.key());
                }
            }
            List<byte[]> values = db.multiGetAsList(keys);
            assert (values.size() == keys.size());
            for (final byte[] value1 : values) {
                assert (value1 != null);
            }
            values = db.multiGetAsList(new ReadOptions(), keys);
            assert (values.size() == keys.size());
            for (final byte[] value1 : values) {
                assert (value1 != null);
            }
        } catch (final RocksDBException e) {
            System.err.println(e);
        }
    }
}