hadoop LocalFileSystemConfigKeys 源码

2022-10-20
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haddop LocalFileSystemConfigKeys 代码

文件路径：/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/LocalFileSystemConfigKeys.java

/**
 * 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;

import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;

/** 
 * This class contains constants for configuration keys used
 * in the local file system, raw local fs and checksum fs.
 *
 */
@InterfaceAudience.Private
@InterfaceStability.Unstable
public class LocalFileSystemConfigKeys extends CommonConfigurationKeys {
  public static final String  LOCAL_FS_BLOCK_SIZE_KEY = "file.blocksize";
  public static final long    LOCAL_FS_BLOCK_SIZE_DEFAULT = 64*1024*1024;
  public static final String  LOCAL_FS_REPLICATION_KEY = "file.replication";
  public static final short   LOCAL_FS_REPLICATION_DEFAULT = 1;
  public static final String  LOCAL_FS_STREAM_BUFFER_SIZE_KEY = 
                                                     "file.stream-buffer-size";
  public static final int     LOCAL_FS_STREAM_BUFFER_SIZE_DEFAULT = 4096;
  public static final String  LOCAL_FS_BYTES_PER_CHECKSUM_KEY = 
                                                     "file.bytes-per-checksum";
  public static final int     LOCAL_FS_BYTES_PER_CHECKSUM_DEFAULT = 512;
  public static final String  LOCAL_FS_CLIENT_WRITE_PACKET_SIZE_KEY =
                                                     "file.client-write-packet-size";
  public static final int     LOCAL_FS_CLIENT_WRITE_PACKET_SIZE_DEFAULT = 64*1024;
}

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