/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.fs.local;
import java.io.IOException;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.fs.CommonConfigurationKeys;
import org.apache.hadoop.fs.FsServerDefaults;
import org.apache.hadoop.util.DataChecksum;
/**
* This class contains constants for configuration keys used
* in the local file system, raw local fs and checksum fs.
*
* Note that the settings for unimplemented features are ignored.
* E.g. checksum related settings are just place holders. Even when
* wrapped with {@link ChecksumFileSystem}, these settings are not
* used.
*/
@InterfaceAudience.Private
@InterfaceStability.Unstable
public class LocalConfigKeys extends CommonConfigurationKeys {
public static final String BLOCK_SIZE_KEY = "file.blocksize";
public static final long BLOCK_SIZE_DEFAULT = 64*1024*1024;
public static final String REPLICATION_KEY = "file.replication";
public static final short REPLICATION_DEFAULT = 1;
public static final String STREAM_BUFFER_SIZE_KEY = "file.stream-buffer-size";
public static final int STREAM_BUFFER_SIZE_DEFAULT = 4096;
public static final String BYTES_PER_CHECKSUM_KEY = "file.bytes-per-checksum";
public static final int BYTES_PER_CHECKSUM_DEFAULT = 512;
public static final String CLIENT_WRITE_PACKET_SIZE_KEY =
"file.client-write-packet-size";
public static final int CLIENT_WRITE_PACKET_SIZE_DEFAULT = 64*1024;
public static final DataChecksum.Type CHECKSUM_TYPE_DEFAULT =
DataChecksum.Type.CRC32;
public static FsServerDefaults getServerDefaults() throws IOException {
return new FsServerDefaults(
BLOCK_SIZE_DEFAULT,
BYTES_PER_CHECKSUM_DEFAULT,
CLIENT_WRITE_PACKET_SIZE_DEFAULT,
REPLICATION_DEFAULT,
STREAM_BUFFER_SIZE_DEFAULT,
CHECKSUM_TYPE_DEFAULT);
}
}