6ef2552953
git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@816830 13f79535-47bb-0310-9956-ffa450edef68
702 lines
21 KiB
XML
702 lines
21 KiB
XML
<?xml version="1.0"?>
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<!--
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
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<!-- Do not modify this file directly. Instead, copy entries that you -->
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<!-- wish to modify from this file into core-site.xml and change them -->
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<!-- there. If core-site.xml does not already exist, create it. -->
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<configuration>
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<!--- global properties -->
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<property>
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<name>hadoop.common.configuration.version</name>
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<value>0.21.0</value>
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<description>version of this configuration file</description>
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</property>
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<property>
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<name>hadoop.tmp.dir</name>
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<value>/tmp/hadoop-${user.name}</value>
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<description>A base for other temporary directories.</description>
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</property>
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<property>
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<name>io.native.lib.available</name>
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<value>true</value>
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<description>Should native hadoop libraries, if present, be used.</description>
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</property>
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<property>
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<name>hadoop.http.filter.initializers</name>
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<value></value>
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<description>A comma separated list of class names. Each class in the list
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must extend org.apache.hadoop.http.FilterInitializer. The corresponding
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Filter will be initialized. Then, the Filter will be applied to all user
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facing jsp and servlet web pages. The ordering of the list defines the
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ordering of the filters.</description>
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</property>
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<property>
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<name>hadoop.security.authorization</name>
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<value>false</value>
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<description>Is service-level authorization enabled?</description>
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</property>
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<!--- logging properties -->
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<property>
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<name>hadoop.logfile.size</name>
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<value>10000000</value>
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<description>The max size of each log file</description>
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</property>
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<property>
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<name>hadoop.logfile.count</name>
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<value>10</value>
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<description>The max number of log files</description>
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</property>
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<!-- i/o properties -->
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<property>
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<name>io.file.buffer.size</name>
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<value>4096</value>
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<description>The size of buffer for use in sequence files.
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The size of this buffer should probably be a multiple of hardware
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page size (4096 on Intel x86), and it determines how much data is
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buffered during read and write operations.</description>
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</property>
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<property>
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<name>io.bytes.per.checksum</name>
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<value>512</value>
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<description>The number of bytes per checksum. Must not be larger than
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io.file.buffer.size.</description>
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</property>
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<property>
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<name>io.skip.checksum.errors</name>
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<value>false</value>
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<description>If true, when a checksum error is encountered while
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reading a sequence file, entries are skipped, instead of throwing an
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exception.</description>
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</property>
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<property>
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<name>io.compression.codecs</name>
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<value>org.apache.hadoop.io.compress.DefaultCodec,org.apache.hadoop.io.compress.GzipCodec,org.apache.hadoop.io.compress.BZip2Codec</value>
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<description>A list of the compression codec classes that can be used
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for compression/decompression.</description>
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</property>
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<property>
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<name>io.serializations</name>
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<value>org.apache.hadoop.io.serializer.WritableSerialization,org.apache.hadoop.io.serializer.avro.AvroSpecificSerialization,org.apache.hadoop.io.serializer.avro.AvroReflectSerialization,org.apache.hadoop.io.serializer.avro.AvroGenericSerialization</value>
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<description>A list of serialization classes that can be used for
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obtaining serializers and deserializers.</description>
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</property>
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<property>
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<name>io.seqfile.local.dir</name>
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<value>${hadoop.tmp.dir}/io/local</value>
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<description>The local directory where sequence file stores intermediate
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data files during merge. May be a comma-separated list of
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directories on different devices in order to spread disk i/o.
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Directories that do not exist are ignored.
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</description>
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</property>
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<property>
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<name>io.map.index.skip</name>
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<value>0</value>
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<description>Number of index entries to skip between each entry.
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Zero by default. Setting this to values larger than zero can
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facilitate opening large MapFiles using less memory.</description>
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</property>
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<!-- file system properties -->
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<property>
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<name>fs.defaultFS</name>
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<value>file:///</value>
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<description>The name of the default file system. A URI whose
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scheme and authority determine the FileSystem implementation. The
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uri's scheme determines the config property (fs.SCHEME.impl) naming
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the FileSystem implementation class. The uri's authority is used to
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determine the host, port, etc. for a filesystem.</description>
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</property>
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<property>
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<name>fs.trash.interval</name>
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<value>0</value>
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<description>Number of minutes between trash checkpoints.
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If zero, the trash feature is disabled.
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</description>
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</property>
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<property>
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<name>fs.file.impl</name>
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<value>org.apache.hadoop.fs.LocalFileSystem</value>
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<description>The FileSystem for file: uris.</description>
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</property>
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<property>
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<name>fs.hdfs.impl</name>
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<value>org.apache.hadoop.hdfs.DistributedFileSystem</value>
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<description>The FileSystem for hdfs: uris.</description>
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</property>
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<property>
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<name>fs.s3.impl</name>
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<value>org.apache.hadoop.fs.s3.S3FileSystem</value>
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<description>The FileSystem for s3: uris.</description>
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</property>
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<property>
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<name>fs.s3n.impl</name>
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<value>org.apache.hadoop.fs.s3native.NativeS3FileSystem</value>
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<description>The FileSystem for s3n: (Native S3) uris.</description>
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</property>
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<property>
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<name>fs.kfs.impl</name>
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<value>org.apache.hadoop.fs.kfs.KosmosFileSystem</value>
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<description>The FileSystem for kfs: uris.</description>
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</property>
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<property>
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<name>fs.hftp.impl</name>
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<value>org.apache.hadoop.hdfs.HftpFileSystem</value>
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</property>
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<property>
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<name>fs.hsftp.impl</name>
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<value>org.apache.hadoop.hdfs.HsftpFileSystem</value>
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</property>
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<property>
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<name>fs.ftp.impl</name>
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<value>org.apache.hadoop.fs.ftp.FTPFileSystem</value>
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<description>The FileSystem for ftp: uris.</description>
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</property>
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<property>
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<name>fs.ramfs.impl</name>
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<value>org.apache.hadoop.fs.InMemoryFileSystem</value>
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<description>The FileSystem for ramfs: uris.</description>
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</property>
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<property>
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<name>fs.har.impl</name>
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<value>org.apache.hadoop.fs.HarFileSystem</value>
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<description>The filesystem for Hadoop archives. </description>
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</property>
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<property>
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<name>fs.har.impl.disable.cache</name>
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<value>true</value>
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<description>Don't cache 'har' filesystem instances.</description>
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</property>
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<property>
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<name>fs.checkpoint.dir</name>
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<value>${hadoop.tmp.dir}/dfs/namesecondary</value>
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<description>Determines where on the local filesystem the DFS secondary
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name node should store the temporary images to merge.
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If this is a comma-delimited list of directories then the image is
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replicated in all of the directories for redundancy.
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</description>
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</property>
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<property>
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<name>fs.checkpoint.edits.dir</name>
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<value>${fs.checkpoint.dir}</value>
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<description>Determines where on the local filesystem the DFS secondary
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name node should store the temporary edits to merge.
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If this is a comma-delimited list of directoires then teh edits is
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replicated in all of the directoires for redundancy.
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Default value is same as fs.checkpoint.dir
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</description>
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</property>
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<property>
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<name>fs.checkpoint.period</name>
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<value>3600</value>
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<description>The number of seconds between two periodic checkpoints.
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</description>
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</property>
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<property>
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<name>fs.checkpoint.size</name>
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<value>67108864</value>
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<description>The size of the current edit log (in bytes) that triggers
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a periodic checkpoint even if the fs.checkpoint.period hasn't expired.
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</description>
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</property>
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<property>
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<name>fs.df.interval</name>
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<value>60000</value>
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<description>Disk usage statistics refresh interval in msec.</description>
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</property>
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<property>
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<name>fs.access.token.enable</name>
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<value>false</value>
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<description>
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If "true", access tokens are used as capabilities for accessing datanodes.
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If "false", no access tokens are checked on accessing datanodes.
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</description>
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</property>
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<property>
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<name>fs.access.key.update.interval</name>
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<value>600</value>
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<description>
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Interval in minutes at which namenode updates its access keys.
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</description>
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</property>
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<property>
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<name>fs.access.token.lifetime</name>
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<value>600</value>
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<description>The lifetime of access tokens in minutes.</description>
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</property>
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<property>
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<name>fs.s3.block.size</name>
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<value>67108864</value>
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<description>Block size to use when writing files to S3.</description>
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</property>
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<property>
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<name>fs.s3.buffer.dir</name>
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<value>${hadoop.tmp.dir}/s3</value>
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<description>Determines where on the local filesystem the S3 filesystem
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should store files before sending them to S3
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(or after retrieving them from S3).
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</description>
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</property>
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<property>
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<name>fs.s3.maxRetries</name>
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<value>4</value>
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<description>The maximum number of retries for reading or writing files to S3,
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before we signal failure to the application.
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</description>
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</property>
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<property>
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<name>fs.s3.sleepTimeSeconds</name>
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<value>10</value>
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<description>The number of seconds to sleep between each S3 retry.
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</description>
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</property>
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<property>
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<name>fs.automatic.close</name>
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<value>true</value>
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<description>By default, FileSystem instances are automatically closed at program
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exit using a JVM shutdown hook. Setting this property to false disables this
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behavior. This is an advanced option that should only be used by server applications
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requiring a more carefully orchestrated shutdown sequence.
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</description>
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</property>
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<property>
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<name>fs.s3n.block.size</name>
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<value>67108864</value>
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<description>Block size to use when reading files using the native S3
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filesystem (s3n: URIs).</description>
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</property>
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<property>
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<name>local.cache.size</name>
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<value>10737418240</value>
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<description>The limit on the size of cache you want to keep, set by default
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to 10GB. This will act as a soft limit on the cache directory for out of band data.
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</description>
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</property>
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<property>
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<name>io.seqfile.compress.blocksize</name>
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<value>1000000</value>
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<description>The minimum block size for compression in block compressed
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SequenceFiles.
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</description>
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</property>
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<property>
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<name>io.seqfile.lazydecompress</name>
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<value>true</value>
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<description>Should values of block-compressed SequenceFiles be decompressed
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only when necessary.
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</description>
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</property>
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<property>
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<name>io.seqfile.sorter.recordlimit</name>
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<value>1000000</value>
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<description>The limit on number of records to be kept in memory in a spill
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in SequenceFiles.Sorter
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</description>
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</property>
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<property>
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<name>io.mapfile.bloom.size</name>
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<value>1048576</value>
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<description>The size of BloomFilter-s used in BloomMapFile. Each time this many
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keys is appended the next BloomFilter will be created (inside a DynamicBloomFilter).
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Larger values minimize the number of filters, which slightly increases the performance,
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but may waste too much space if the total number of keys is usually much smaller
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than this number.
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</description>
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</property>
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<property>
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<name>io.mapfile.bloom.error.rate</name>
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<value>0.005</value>
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<description>The rate of false positives in BloomFilter-s used in BloomMapFile.
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As this value decreases, the size of BloomFilter-s increases exponentially. This
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value is the probability of encountering false positives (default is 0.5%).
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</description>
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</property>
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<property>
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<name>hadoop.util.hash.type</name>
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<value>murmur</value>
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<description>The default implementation of Hash. Currently this can take one of the
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two values: 'murmur' to select MurmurHash and 'jenkins' to select JenkinsHash.
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</description>
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</property>
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<!-- ipc properties -->
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<property>
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<name>ipc.client.idlethreshold</name>
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<value>4000</value>
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<description>Defines the threshold number of connections after which
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connections will be inspected for idleness.
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</description>
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</property>
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<property>
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<name>ipc.client.kill.max</name>
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<value>10</value>
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<description>Defines the maximum number of clients to disconnect in one go.
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</description>
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</property>
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<property>
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<name>ipc.client.connection.maxidletime</name>
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<value>10000</value>
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<description>The maximum time in msec after which a client will bring down the
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connection to the server.
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</description>
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</property>
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<property>
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<name>ipc.client.connect.max.retries</name>
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<value>10</value>
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<description>Indicates the number of retries a client will make to establish
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a server connection.
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</description>
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</property>
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<property>
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<name>ipc.server.listen.queue.size</name>
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<value>128</value>
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<description>Indicates the length of the listen queue for servers accepting
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client connections.
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</description>
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</property>
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<property>
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<name>ipc.server.tcpnodelay</name>
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<value>false</value>
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<description>Turn on/off Nagle's algorithm for the TCP socket connection on
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the server. Setting to true disables the algorithm and may decrease latency
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with a cost of more/smaller packets.
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</description>
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</property>
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<property>
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<name>ipc.client.tcpnodelay</name>
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<value>false</value>
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<description>Turn on/off Nagle's algorithm for the TCP socket connection on
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the client. Setting to true disables the algorithm and may decrease latency
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with a cost of more/smaller packets.
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</description>
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</property>
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<!-- Web Interface Configuration -->
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<property>
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<name>webinterface.private.actions</name>
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<value>false</value>
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<description> If set to true, the web interfaces of JT and NN may contain
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actions, such as kill job, delete file, etc., that should
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not be exposed to public. Enable this option if the interfaces
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are only reachable by those who have the right authorization.
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</description>
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</property>
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<!-- Proxy Configuration -->
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<property>
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<name>hadoop.rpc.socket.factory.class.default</name>
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<value>org.apache.hadoop.net.StandardSocketFactory</value>
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<description> Default SocketFactory to use. This parameter is expected to be
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formatted as "package.FactoryClassName".
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</description>
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</property>
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<property>
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<name>hadoop.rpc.socket.factory.class.ClientProtocol</name>
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<value></value>
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<description> SocketFactory to use to connect to a DFS. If null or empty, use
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hadoop.rpc.socket.class.default. This socket factory is also used by
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DFSClient to create sockets to DataNodes.
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</description>
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</property>
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<property>
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<name>hadoop.socks.server</name>
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<value></value>
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<description> Address (host:port) of the SOCKS server to be used by the
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SocksSocketFactory.
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</description>
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</property>
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<!-- Rack Configuration -->
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<property>
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<name>net.topology.node.switch.mapping.impl</name>
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<value>org.apache.hadoop.net.ScriptBasedMapping</value>
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<description> The default implementation of the DNSToSwitchMapping. It
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invokes a script specified in topology.script.file.name to resolve
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node names. If the value for topology.script.file.name is not set, the
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default value of DEFAULT_RACK is returned for all node names.
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</description>
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</property>
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<property>
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<name>net.topology.script.file.name</name>
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<value></value>
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<description> The script name that should be invoked to resolve DNS names to
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NetworkTopology names. Example: the script would take host.foo.bar as an
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argument, and return /rack1 as the output.
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</description>
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</property>
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<property>
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<name>net.topology.script.number.args</name>
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<value>100</value>
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<description> The max number of args that the script configured with
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topology.script.file.name should be run with. Each arg is an
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IP address.
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</description>
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</property>
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<!-- Local file system -->
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<property>
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<name>file.stream-buffer-size</name>
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<value>4096</value>
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<description>The size of buffer to stream files.
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The size of this buffer should probably be a multiple of hardware
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page size (4096 on Intel x86), and it determines how much data is
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buffered during read and write operations.</description>
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</property>
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<property>
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<name>file.bytes-per-checksum</name>
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<value>512</value>
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<description>The number of bytes per checksum. Must not be larger than
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file.stream-buffer-size</description>
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</property>
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<property>
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<name>file.client-write-packet-size</name>
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<value>65536</value>
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<description>Packet size for clients to write</description>
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</property>
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<property>
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<name>file.blocksize</name>
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<value>67108864</value>
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<description>Block size</description>
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</property>
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<property>
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<name>file.replication</name>
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<value>1</value>
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<description>Replication factor</description>
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</property>
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<!-- s3 File System -->
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<property>
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<name>s3.stream-buffer-size</name>
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<value>4096</value>
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|
<description>The size of buffer to stream files.
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|
The size of this buffer should probably be a multiple of hardware
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|
page size (4096 on Intel x86), and it determines how much data is
|
|
buffered during read and write operations.</description>
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|
</property>
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|
|
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<property>
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<name>s3.bytes-per-checksum</name>
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|
<value>512</value>
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|
<description>The number of bytes per checksum. Must not be larger than
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|
s3.stream-buffer-size</description>
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|
</property>
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|
|
|
<property>
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|
<name>s3.client-write-packet-size</name>
|
|
<value>65536</value>
|
|
<description>Packet size for clients to write</description>
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|
</property>
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|
|
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<property>
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<name>s3.blocksize</name>
|
|
<value>67108864</value>
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|
<description>Block size</description>
|
|
</property>
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|
|
|
<property>
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<name>s3.replication</name>
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<value>3</value>
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|
<description>Replication factor</description>
|
|
</property>
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|
|
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<!-- s3native File System -->
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|
|
|
<property>
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<name>s3native.stream-buffer-size</name>
|
|
<value>4096</value>
|
|
<description>The size of buffer to stream files.
|
|
The size of this buffer should probably be a multiple of hardware
|
|
page size (4096 on Intel x86), and it determines how much data is
|
|
buffered during read and write operations.</description>
|
|
</property>
|
|
|
|
<property>
|
|
<name>s3native.bytes-per-checksum</name>
|
|
<value>512</value>
|
|
<description>The number of bytes per checksum. Must not be larger than
|
|
s3native.stream-buffer-size</description>
|
|
</property>
|
|
|
|
<property>
|
|
<name>s3native.client-write-packet-size</name>
|
|
<value>65536</value>
|
|
<description>Packet size for clients to write</description>
|
|
</property>
|
|
|
|
<property>
|
|
<name>s3native.blocksize</name>
|
|
<value>67108864</value>
|
|
<description>Block size</description>
|
|
</property>
|
|
|
|
<property>
|
|
<name>s3native.replication</name>
|
|
<value>3</value>
|
|
<description>Replication factor</description>
|
|
</property>
|
|
|
|
<!-- Kosmos File System -->
|
|
|
|
<property>
|
|
<name>kfs.stream-buffer-size</name>
|
|
<value>4096</value>
|
|
<description>The size of buffer to stream files.
|
|
The size of this buffer should probably be a multiple of hardware
|
|
page size (4096 on Intel x86), and it determines how much data is
|
|
buffered during read and write operations.</description>
|
|
</property>
|
|
|
|
<property>
|
|
<name>kfs.bytes-per-checksum</name>
|
|
<value>512</value>
|
|
<description>The number of bytes per checksum. Must not be larger than
|
|
kfs.stream-buffer-size</description>
|
|
</property>
|
|
|
|
<property>
|
|
<name>kfs.client-write-packet-size</name>
|
|
<value>65536</value>
|
|
<description>Packet size for clients to write</description>
|
|
</property>
|
|
|
|
<property>
|
|
<name>kfs.blocksize</name>
|
|
<value>67108864</value>
|
|
<description>Block size</description>
|
|
</property>
|
|
|
|
<property>
|
|
<name>kfs.replication</name>
|
|
<value>3</value>
|
|
<description>Replication factor</description>
|
|
</property>
|
|
|
|
<!-- FTP file system -->
|
|
<property>
|
|
<name>ftp.stream-buffer-size</name>
|
|
<value>4096</value>
|
|
<description>The size of buffer to stream files.
|
|
The size of this buffer should probably be a multiple of hardware
|
|
page size (4096 on Intel x86), and it determines how much data is
|
|
buffered during read and write operations.</description>
|
|
</property>
|
|
|
|
<property>
|
|
<name>ftp.bytes-per-checksum</name>
|
|
<value>512</value>
|
|
<description>The number of bytes per checksum. Must not be larger than
|
|
ftp.stream-buffer-size</description>
|
|
</property>
|
|
|
|
<property>
|
|
<name>ftp.client-write-packet-size</name>
|
|
<value>65536</value>
|
|
<description>Packet size for clients to write</description>
|
|
</property>
|
|
|
|
<property>
|
|
<name>ftp.blocksize</name>
|
|
<value>67108864</value>
|
|
<description>Block size</description>
|
|
</property>
|
|
|
|
<property>
|
|
<name>ftp.replication</name>
|
|
<value>3</value>
|
|
<description>Replication factor</description>
|
|
</property>
|
|
|
|
|
|
</configuration>
|