Example usage for org.apache.hadoop.hdfs DFSConfigKeys DFS_BYTES_PER_CHECKSUM_DEFAULT

Introduction

In this page you can find the example usage for org.apache.hadoop.hdfs DFSConfigKeys DFS_BYTES_PER_CHECKSUM_DEFAULT.

Prototype

int DFS_BYTES_PER_CHECKSUM_DEFAULT

To view the source code for org.apache.hadoop.hdfs DFSConfigKeys DFS_BYTES_PER_CHECKSUM_DEFAULT.

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Usage

From source file:backup.datanode.DataNodeRestoreProcessor.java

License:Apache License

public DataNodeRestoreProcessor(Configuration conf, DataNode datanode) throws Exception {
    _closer = Closer.create();/*from   w  ww .j  ava 2  s  .c  om*/
    _datanode = datanode;
    _restoreThroughput = Metrics.METRICS.meter(RESTORE_THROUGHPUT);
    _bytesPerChecksum = conf.getInt(DFSConfigKeys.DFS_BYTES_PER_CHECKSUM_KEY,
            DFSConfigKeys.DFS_BYTES_PER_CHECKSUM_DEFAULT);
    _checksumType = Type
            .valueOf(conf.get(DFSConfigKeys.DFS_CHECKSUM_TYPE_KEY, DFSConfigKeys.DFS_CHECKSUM_TYPE_DEFAULT));
    int threads = conf.getInt(DFS_BACKUP_DATANODE_RESTORE_BLOCK_HANDLER_COUNT_KEY,
            DFS_BACKUP_DATANODE_RESTORE_BLOCK_HANDLER_COUNT_DEFAULT);
    long pauseOnError = conf.getLong(DFS_BACKUP_DATANODE_RESTORE_ERROR_PAUSE_KEY,
            DFS_BACKUP_DATANODE_RESTORE_ERROR_PAUSE_DEFAULT);
    _backupStore = _closer.register(BackupStore.create(BackupUtil.convert(conf)));
    _restoreBlocks = new ArrayBlockingQueue<>(threads);
    _executorService = Executors.newCachedThreadPool();
    _closer.register((Closeable) () -> _executorService.shutdownNow());
    for (int t = 0; t < threads; t++) {
        _executorService.submit(Executable.createDaemon(LOG, pauseOnError, _running, () -> restoreBlocks()));
    }
}

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