Examples with HashFunction voldemort.utils.HashFunction used on opensource projects

Example 1 with HashFunction

use of voldemort.utils.HashFunction in project voldemort by voldemort.

the class BdbConvertBaseToPidScan method transfer.

@Override
public void transfer() throws Exception {
    cursor = srcDB.openCursor(null, null);
    DatabaseEntry keyEntry = new DatabaseEntry();
    DatabaseEntry valueEntry = new DatabaseEntry();
    byte[] prevKey = null;
    List<Versioned<byte[]>> vals = new ArrayList<Versioned<byte[]>>();
    HashFunction hash = new FnvHashFunction();
    int totalPartitions = cluster.getNumberOfPartitions();
    long startTime = System.currentTimeMillis();
    int scanCount = 0;
    int keyCount = 0;
    while (cursor.getNext(keyEntry, valueEntry, LockMode.READ_UNCOMMITTED) == OperationStatus.SUCCESS) {
        scanCount++;
        if (scanCount % 1000000 == 0)
            logger.info("Converted " + scanCount + " entries in " + (System.currentTimeMillis() - startTime) / 1000 + " secs");
        // read the value as a versioned Object
        VectorClock clock = new VectorClock(valueEntry.getData());
        byte[] bytes = ByteUtils.copy(valueEntry.getData(), clock.sizeInBytes(), valueEntry.getData().length);
        Versioned<byte[]> value = new Versioned<byte[]>(bytes, clock);
        byte[] key = keyEntry.getData();
        if (prevKey != null && (ByteUtils.compare(prevKey, key) != 0)) {
            // there is a new key; write out the buffered values and
            // previous key
            int partition = BdbConvertData.abs(hash.hash(prevKey)) % (Math.max(1, totalPartitions));
            OperationStatus putStatus = dstDB.put(null, new DatabaseEntry(StoreBinaryFormat.makePrefixedKey(prevKey, partition)), new DatabaseEntry(StoreBinaryFormat.toByteArray(vals)));
            if (OperationStatus.SUCCESS != putStatus) {
                String errorStr = "Put failed with " + putStatus + " for key" + BdbConvertData.writeAsciiString(prevKey);
                logger.error(errorStr);
                throw new Exception(errorStr);
            }
            vals = new ArrayList<Versioned<byte[]>>();
            keyCount++;
        }
        vals.add(value);
        prevKey = key;
    }
    if (vals.size() > 0) {
        int partition = BdbConvertData.abs(hash.hash(prevKey)) % (Math.max(1, totalPartitions));
        OperationStatus putStatus = dstDB.put(null, new DatabaseEntry(StoreBinaryFormat.makePrefixedKey(prevKey, partition)), new DatabaseEntry(StoreBinaryFormat.toByteArray(vals)));
        if (OperationStatus.SUCCESS != putStatus) {
            String errorStr = "Put failed with " + putStatus + " for key" + BdbConvertData.writeAsciiString(prevKey);
            logger.error(errorStr);
            throw new Exception(errorStr);
        }
        keyCount++;
    }
    logger.info("Completed " + scanCount + " entries and " + keyCount + " keys in " + (System.currentTimeMillis() - startTime) / 1000 + " secs");
}

Example 2 with HashFunction

use of voldemort.utils.HashFunction in project voldemort by voldemort.

the class BdbConvertNewDupToPidScan method transfer.

@Override
public void transfer() throws Exception {
    cursor = srcDB.openCursor(null, null);
    DatabaseEntry keyEntry = new DatabaseEntry();
    DatabaseEntry valueEntry = new DatabaseEntry();
    HashFunction hash = new FnvHashFunction();
    int totalPartitions = cluster.getNumberOfPartitions();
    List<Versioned<byte[]>> vals;
    long startTime = System.currentTimeMillis();
    int scanCount = 0;
    int keyCount = 0;
    while (cursor.getNext(keyEntry, valueEntry, LockMode.READ_UNCOMMITTED) == OperationStatus.SUCCESS) {
        keyCount++;
        vals = StoreBinaryFormat.fromByteArray(valueEntry.getData());
        scanCount += vals.size();
        int partition = BdbConvertData.abs(hash.hash(keyEntry.getData())) % (Math.max(1, totalPartitions));
        OperationStatus putStatus = dstDB.put(null, new DatabaseEntry(StoreBinaryFormat.makePrefixedKey(keyEntry.getData(), partition)), valueEntry);
        if (OperationStatus.SUCCESS != putStatus) {
            String errorStr = "Put failed with " + putStatus + " for key" + BdbConvertData.writeAsciiString(keyEntry.getData());
            logger.error(errorStr);
            throw new Exception(errorStr);
        }
        if (scanCount % 1000000 == 0)
            logger.info("Reverted " + scanCount + " entries in " + (System.currentTimeMillis() - startTime) / 1000 + " secs");
    }
    logger.info("Converted " + scanCount + " entries and " + keyCount + " keys in " + (System.currentTimeMillis() - startTime) / 1000 + " secs");
}