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HADOOP-6756. Documentation for common configuration keys. Contributed by Erik Steffl.

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git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@960079 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Konstantin Shvachko 2010-07-02 18:16:30 +00:00
parent 451c8ae5e8
commit 05b1f87909
4 changed files with 368 additions and 122 deletions
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12
CHANGES.txt
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@ -2,7 +2,10 @@ Hadoop Change Log
Trunk (unreleased changes)
INCOMPATIBLE CHANGES
NEW FEATURES
HADOOP-6791. Refresh for proxy superuser config
(common part for HDFS-1096) (boryas)
@ -11,6 +14,7 @@ Trunk (unreleased changes)
via jghoman)
IMPROVEMENTS
HADOOP-6644. util.Shell getGROUPS_FOR_USER_COMMAND method name
- should use common naming convention (boryas)
@ -47,7 +51,13 @@ Trunk (unreleased changes)
HADOOP-6814. Adds an API in UserGroupInformation to get the real
authentication method of a passed UGI. (Jitendra Pandey via ddas)
HADOOP-6756. Documentation for common configuration keys.
(Erik Steffl via shv)
OPTIMIZATIONS
BUG FIXES
HADOOP-6638. try to relogin in a case of failed RPC connection (expired tgt)
only in case the subject is loginUser or proxyUgi.realUser. (boryas)
@ -92,7 +102,7 @@ Trunk (unreleased changes)
(ddas)
HADOOP-6815. refreshSuperUserGroupsConfiguration should use server side
configuration for the refresh (boryas)
configuration for the refresh (boryas)
Release 0.21.0 - Unreleased

86
src/java/core-default.xml
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@ -53,6 +53,8 @@
ordering of the filters.</description>
</property>
<!--- security properties -->
<property>
<name>hadoop.security.authorization</name>
<value>false</value>
@ -66,6 +68,35 @@
</description>
</property>
<property>
<name>hadoop.security.group.mapping</name>
<value>org.apache.hadoop.security.ShellBasedUnixGroupsMapping</value>
<description>
Class for user to group mapping (get groups for a given user) for ACL
</description>
</property>
<property>
<name>hadoop.security.groups.cache.secs</name>
<value>300</value>
<description>
This is the config controlling the validity of the entries in the cache
containing the user->group mapping. When this duration has expired,
then the implementation of the group mapping provider is invoked to get
the groups of the user and then cached back.
</description>
</property>
<property>
<name>hadoop.security.service.user.name.key</name>
<value></value>
<description>
For those cases where the same RPC protocol is implemented by multiple
servers, this configuration is required for specifying the principal
name to use for the service when the client wishes to make an RPC call.
</description>
</property>
<property>
<name>hadoop.rpc.protection</name>
<value>authentication</value>
@ -148,6 +179,19 @@
facilitate opening large MapFiles using less memory.</description>
</property>
<property>
<name>io.map.index.interval</name>
<value>128</value>
<description>
MapFile consist of two files - data file (tuples) and index file
(keys). For every io.map.index.interval records written in the
data file, an entry (record-key, data-file-position) is written
in the index file. This is to allow for doing binary search later
within the index file to look up records by their keys and get their
closest positions in the data file.
</description>
</property>
<!-- file system properties -->
<property>
@ -239,6 +283,20 @@
<description>The FileSystem for ftp: uris.</description>
</property>
<property>
<name>fs.ftp.host</name>
<value>0.0.0.0</value>
<description>FTP filesystem connects to this server</description>
</property>
<property>
<name>fs.ftp.host.port</name>
<value>21</value>
<description>
FTP filesystem connects to fs.ftp.host on this port
</description>
</property>
<property>
<name>fs.ramfs.impl</name>
<value>org.apache.hadoop.fs.InMemoryFileSystem</value>
@ -717,5 +775,33 @@
<description>Replication factor</description>
</property>
<!-- Tfile -->
<property>
<name>tfile.io.chunk.size</name>
<value>1048576</value>
<description>
Value chunk size in bytes. Default to
1MB. Values of the length less than the chunk size is
guaranteed to have known value length in read time (See also
TFile.Reader.Scanner.Entry.isValueLengthKnown()).
</description>
</property>
<property>
<name>tfile.fs.output.buffer.size</name>
<value>262144</value>
<description>
Buffer size used for FSDataOutputStream in bytes.
</description>
</property>
<property>
<name>tfile.fs.input.buffer.size</name>
<value>262144</value>
<description>
Buffer size used for FSDataInputStream in bytes.
</description>
</property>
</configuration>

142
src/java/org/apache/hadoop/fs/CommonConfigurationKeys.java
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@ -25,135 +25,65 @@
* This class contains constants for configuration keys used
* in the common code.
*
* It inherits all the publicly documented configuration keys
* and adds unsupported keys.
*
*/
@InterfaceAudience.Private
@InterfaceStability.Unstable
public class CommonConfigurationKeys {
public class CommonConfigurationKeys extends CommonConfigurationKeysPublic {
// The Keys
public static final String IO_NATIVE_LIB_AVAILABLE_KEY =
"io.native.lib.available";
public static final boolean IO_NATIVE_LIB_AVAILABLE_DEFAULT = true;
public static final String NET_TOPOLOGY_SCRIPT_NUMBER_ARGS_KEY =
"net.topology.script.number.args";
public static final int NET_TOPOLOGY_SCRIPT_NUMBER_ARGS_DEFAULT = 100;
//FS keys
/** Default location for user home directories */
public static final String FS_HOME_DIR_KEY = "fs.homeDir";
/** Default value for FS_HOME_DIR_KEY */
public static final String FS_HOME_DIR_DEFAULT = "/user";
public static final String FS_DEFAULT_NAME_KEY = "fs.defaultFS";
public static final String FS_DEFAULT_NAME_DEFAULT = "file:///";
public static final String FS_PERMISSIONS_UMASK_KEY = "fs.permissions.umask-mode";
/** Default umask for files created in HDFS */
public static final String FS_PERMISSIONS_UMASK_KEY =
"fs.permissions.umask-mode";
/** Default value for FS_PERMISSIONS_UMASK_KEY */
public static final int FS_PERMISSIONS_UMASK_DEFAULT = 0022;
public static final String FS_DF_INTERVAL_KEY = "fs.df.interval";
public static final long FS_DF_INTERVAL_DEFAULT = 60000;
//Defaults are not specified for following keys
public static final String NET_TOPOLOGY_SCRIPT_FILE_NAME_KEY =
"net.topology.script.file.name";
public static final String NET_TOPOLOGY_CONFIGURED_NODE_MAPPING_KEY =
"net.topology.configured.node.mapping";
public static final String NET_TOPOLOGY_NODE_SWITCH_MAPPING_IMPL_KEY =
"net.topology.node.switch.mapping.impl";
/** @deprecated not used, jira was created to remove this constant:
* https://issues.apache.org/jira/browse/HADOOP-6802
*/
public static final String FS_CLIENT_BUFFER_DIR_KEY =
"fs.client.buffer.dir";
public static final String FS_TRASH_CHECKPOINT_INTERVAL_KEY = "fs.trash.checkpoint.interval";
public static final long FS_TRASH_CHECKPOINT_INTERVAL_DEFAULT = 0;
//TBD: Code is not updated to use following keys.
//These keys will be used in later versions
//
public static final long FS_LOCAL_BLOCK_SIZE_DEFAULT = 32*1024*1024;
public static final String FS_AUTOMATIC_CLOSE_KEY = "fs.automatic.close";
public static final boolean FS_AUTOMATIC_CLOSE_DEFAULT = true;
public static final String FS_FILE_IMPL_KEY = "fs.file.impl";
public static final String FS_FTP_HOST_KEY = "fs.ftp.host";
public static final String FS_FTP_HOST_PORT_KEY = "fs.ftp.host.port";
public static final String FS_TRASH_INTERVAL_KEY = "fs.trash.interval";
public static final long FS_TRASH_INTERVAL_DEFAULT = 0;
public static final String IO_MAPFILE_BLOOM_SIZE_KEY = "io.mapfile.bloom.size";
public static final int IO_MAPFILE_BLOOM_SIZE_DEFAULT = 1024*1024;
public static final String IO_MAPFILE_BLOOM_ERROR_RATE_KEY =
"io.mapfile.bloom.error.rate" ;
public static final float IO_MAPFILE_BLOOM_ERROR_RATE_DEFAULT = 0.005f;
public static final String IO_COMPRESSION_CODEC_LZO_CLASS_KEY = "io.compression.codec.lzo.class";
public static final String IO_COMPRESSION_CODEC_LZO_BUFFERSIZE_KEY =
"io.compression.codec.lzo.buffersize";
public static final int IO_COMPRESSION_CODEC_LZO_BUFFERSIZE_DEFAULT = 64*1024;
public static final String IO_MAP_INDEX_INTERVAL_KEY = "io.map.index.interval";
public static final int IO_MAP_INDEX_INTERVAL_DEFAULT = 128;
public static final String IO_MAP_INDEX_SKIP_KEY = "io.map.index.skip";
public static final int IO_MAP_INDEX_SKIP_DEFAULT = 0;
public static final String IO_SEQFILE_COMPRESS_BLOCKSIZE_KEY = "io.seqfile.compress.blocksize";
public static final int IO_SEQFILE_COMPRESS_BLOCKSIZE_DEFAULT = 1000000;
public static final String IO_SKIP_CHECKSUM_ERRORS_KEY = "io.skip.checksum.errors";
public static final boolean IO_SKIP_CHECKSUM_ERRORS_DEFAULT = false;
public static final String IO_SORT_MB_KEY = "io.sort.mb";
public static final int IO_SORT_MB_DEFAULT = 100;
public static final String IO_SORT_FACTOR_KEY = "io.sort.factor";
public static final int IO_SORT_FACTOR_DEFAULT = 100;
public static final String IO_SERIALIZATIONS_KEY = "io.serializations";
public static final String TFILE_IO_CHUNK_SIZE_KEY = "tfile.io.chunk.size";
public static final int TFILE_IO_CHUNK_SIZE_DEFAULT = 1024*1024;
public static final String TFILE_FS_INPUT_BUFFER_SIZE_KEY = "tfile.fs.input.buffer.size";
public static final int TFILE_FS_INPUT_BUFFER_SIZE_DEFAULT = 256*1024;
public static final String TFILE_FS_OUTPUT_BUFFER_SIZE_KEY = "tfile.fs.output.buffer.size";
public static final int TFILE_FS_OUTPUT_BUFFER_SIZE_DEFAULT = 256*1024;
/** How often does RPC client send pings to RPC server */
public static final String IPC_PING_INTERVAL_KEY = "ipc.ping.interval";
/** Default value for IPC_PING_INTERVAL_KEY */
public static final int IPC_PING_INTERVAL_DEFAULT = 60000;
/** Enables pings from RPC client to the server */
public static final String IPC_CLIENT_PING_KEY = "ipc.client.ping";
/** Default value of IPC_CLIENT_PING_KEY */
public static final boolean IPC_CLIENT_PING_DEFAULT = true;
public static final String IPC_CLIENT_CONNECTION_MAXIDLETIME_KEY =
"ipc.client.connection.maxidletime";
public static final int IPC_CLIENT_CONNECTION_MAXIDLETIME_DEFAULT = 10000;
public static final String IPC_CLIENT_CONNECT_MAX_RETRIES_KEY =
"ipc.client.connect.max.retries";
public static final int IPC_CLIENT_CONNECT_MAX_RETRIES_DEFAULT = 10;
public static final String IPC_CLIENT_TCPNODELAY_KEY = "ipc.client.tcpnodelay";
public static final boolean IPC_CLIENT_TCPNODELAY_DEFAULT = false;
public static final String IPC_SERVER_LISTEN_QUEUE_SIZE_KEY =
"ipc.server.listen.queue.size";
public static final int IPC_SERVER_LISTEN_QUEUE_SIZE_DEFAULT = 128;
public static final String IPC_CLIENT_KILL_MAX_KEY = "ipc.client.kill.max";
public static final int IPC_CLIENT_KILL_MAX_DEFAULT = 10;
public static final String IPC_CLIENT_IDLETHRESHOLD_KEY = "ipc.client.idlethreshold";
public static final int IPC_CLIENT_IDLETHRESHOLD_DEFAULT = 4000;
public static final String IPC_SERVER_TCPNODELAY_KEY = "ipc.server.tcpnodelay";
public static final boolean IPC_SERVER_TCPNODELAY_DEFAULT = false;
/** Responses larger than this will be logged */
public static final String IPC_SERVER_RPC_MAX_RESPONSE_SIZE_KEY =
"ipc.server.max.response.size";
/** Default value for IPC_SERVER_RPC_MAX_RESPONSE_SIZE_KEY */
public static final int IPC_SERVER_RPC_MAX_RESPONSE_SIZE_DEFAULT =
1024*1024;
/** Number of threads in RPC server reading from the socket */
public static final String IPC_SERVER_RPC_READ_THREADS_KEY =
"ipc.server.read.threadpool.size";
/** Default value for IPC_SERVER_RPC_READ_THREADS_KEY */
public static final int IPC_SERVER_RPC_READ_THREADS_DEFAULT = 1;
/**
* How many calls per handler are allowed in the queue.
*/
/** How many calls per handler are allowed in the queue. */
public static final String IPC_SERVER_HANDLER_QUEUE_SIZE_KEY =
"ipc.server.handler.queue.size";
/**
* The default number of calls per handler in the queue.
*/
/** Default value for IPC_SERVER_HANDLER_QUEUE_SIZE_KEY */
public static final int IPC_SERVER_HANDLER_QUEUE_SIZE_DEFAULT = 100;
public static final String HADOOP_RPC_SOCKET_FACTORY_CLASS_DEFAULT_KEY =
"hadoop.rpc.socket.factory.class.default";
public static final String HADOOP_SOCKS_SERVER_KEY = "hadoop.socks.server";
public static final String HADOOP_JOB_UGI_KEY = "hadoop.job.ugi";
public static final String HADOOP_UTIL_HASH_TYPE_KEY = "hadoop.util.hash.type";
public static final String HADOOP_UTIL_HASH_TYPE_DEFAULT = "murmur";
public static final String HADOOP_SECURITY_GROUP_MAPPING = "hadoop.security.group.mapping";
public static final String HADOOP_SECURITY_GROUPS_CACHE_SECS = "hadoop.security.groups.cache.secs";
public static final String HADOOP_SECURITY_AUTHENTICATION = "hadoop.security.authentication";
public static final String HADOOP_SECURITY_AUTHORIZATION =
"hadoop.security.authorization";
public static final String HADOOP_SECURITY_SERVICE_USER_NAME_KEY =
"hadoop.security.service.user.name.key";
/** Internal buffer size for Lzo compressor/decompressors */
public static final String IO_COMPRESSION_CODEC_LZO_BUFFERSIZE_KEY =
"io.compression.codec.lzo.buffersize";
/** Default value for IO_COMPRESSION_CODEC_LZO_BUFFERSIZE_KEY */
public static final int IO_COMPRESSION_CODEC_LZO_BUFFERSIZE_DEFAULT =
64*1024;
/** This is for specifying the implementation for the mappings from
* hostnames to the racks they belong to
*/
public static final String NET_TOPOLOGY_CONFIGURED_NODE_MAPPING_KEY =
"net.topology.configured.node.mapping";
}

220
src/java/org/apache/hadoop/fs/CommonConfigurationKeysPublic.java Normal file
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@ -0,0 +1,220 @@
/**
* 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;
/**
* This class contains constants for configuration keys used
* in the common code.
*
* It includes all publicly documented configuration keys. In general
* this class should not be used directly (use CommonConfigurationKeys
* instead)
*
*/
@InterfaceAudience.Public
public class CommonConfigurationKeysPublic {
// The Keys
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String IO_NATIVE_LIB_AVAILABLE_KEY =
"io.native.lib.available";
/** Default value for IO_NATIVE_LIB_AVAILABLE_KEY */
public static final boolean IO_NATIVE_LIB_AVAILABLE_DEFAULT = true;
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String NET_TOPOLOGY_SCRIPT_NUMBER_ARGS_KEY =
"net.topology.script.number.args";
/** Default value for NET_TOPOLOGY_SCRIPT_NUMBER_ARGS_KEY */
public static final int NET_TOPOLOGY_SCRIPT_NUMBER_ARGS_DEFAULT = 100;
//FS keys
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String FS_DEFAULT_NAME_KEY = "fs.defaultFS";
/** Default value for FS_DEFAULT_NAME_KEY */
public static final String FS_DEFAULT_NAME_DEFAULT = "file:///";
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String FS_DF_INTERVAL_KEY = "fs.df.interval";
/** Default value for FS_DF_INTERVAL_KEY */
public static final long FS_DF_INTERVAL_DEFAULT = 60000;
//Defaults are not specified for following keys
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String NET_TOPOLOGY_SCRIPT_FILE_NAME_KEY =
"net.topology.script.file.name";
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String NET_TOPOLOGY_NODE_SWITCH_MAPPING_IMPL_KEY =
"net.topology.node.switch.mapping.impl";
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String FS_TRASH_CHECKPOINT_INTERVAL_KEY =
"fs.trash.checkpoint.interval";
/** Default value for FS_TRASH_CHECKPOINT_INTERVAL_KEY */
public static final long FS_TRASH_CHECKPOINT_INTERVAL_DEFAULT = 0;
// TBD: Code is still using hardcoded values (e.g. "fs.automatic.close")
// instead of constant (e.g. FS_AUTOMATIC_CLOSE_KEY)
//
/** Not used anywhere, looks like default value for FS_LOCAL_BLOCK_SIZE */
public static final long FS_LOCAL_BLOCK_SIZE_DEFAULT = 32*1024*1024;
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String FS_AUTOMATIC_CLOSE_KEY = "fs.automatic.close";
/** Default value for FS_AUTOMATIC_CLOSE_KEY */
public static final boolean FS_AUTOMATIC_CLOSE_DEFAULT = true;
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String FS_FILE_IMPL_KEY = "fs.file.impl";
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String FS_FTP_HOST_KEY = "fs.ftp.host";
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String FS_FTP_HOST_PORT_KEY = "fs.ftp.host.port";
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String FS_TRASH_INTERVAL_KEY = "fs.trash.interval";
/** Default value for FS_TRASH_INTERVAL_KEY */
public static final long FS_TRASH_INTERVAL_DEFAULT = 0;
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String IO_MAPFILE_BLOOM_SIZE_KEY =
"io.mapfile.bloom.size";
/** Default value for IO_MAPFILE_BLOOM_SIZE_KEY */
public static final int IO_MAPFILE_BLOOM_SIZE_DEFAULT = 1024*1024;
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String IO_MAPFILE_BLOOM_ERROR_RATE_KEY =
"io.mapfile.bloom.error.rate" ;
/** Default value for IO_MAPFILE_BLOOM_ERROR_RATE_KEY */
public static final float IO_MAPFILE_BLOOM_ERROR_RATE_DEFAULT = 0.005f;
/** Codec class that implements Lzo compression algorithm */
public static final String IO_COMPRESSION_CODEC_LZO_CLASS_KEY =
"io.compression.codec.lzo.class";
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String IO_MAP_INDEX_INTERVAL_KEY =
"io.map.index.interval";
/** Default value for IO_MAP_INDEX_INTERVAL_DEFAULT */
public static final int IO_MAP_INDEX_INTERVAL_DEFAULT = 128;
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String IO_MAP_INDEX_SKIP_KEY = "io.map.index.skip";
/** Default value for IO_MAP_INDEX_SKIP_KEY */
public static final int IO_MAP_INDEX_SKIP_DEFAULT = 0;
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String IO_SEQFILE_COMPRESS_BLOCKSIZE_KEY =
"io.seqfile.compress.blocksize";
/** Default value for IO_SEQFILE_COMPRESS_BLOCKSIZE_KEY */
public static final int IO_SEQFILE_COMPRESS_BLOCKSIZE_DEFAULT = 1000000;
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String IO_SKIP_CHECKSUM_ERRORS_KEY =
"io.skip.checksum.errors";
/** Default value for IO_SKIP_CHECKSUM_ERRORS_KEY */
public static final boolean IO_SKIP_CHECKSUM_ERRORS_DEFAULT = false;
/**
* @deprecated Moved to mapreduce, see mapreduce.task.io.sort.mb
* in mapred-default.xml
* See https://issues.apache.org/jira/browse/HADOOP-6801
*/
public static final String IO_SORT_MB_KEY = "io.sort.mb";
/** Default value for IO_SORT_MB_DEFAULT */
public static final int IO_SORT_MB_DEFAULT = 100;
/**
* @deprecated Moved to mapreduce, see mapreduce.task.io.sort.factor
* in mapred-default.xml
* See https://issues.apache.org/jira/browse/HADOOP-6801
*/
public static final String IO_SORT_FACTOR_KEY = "io.sort.factor";
/** Default value for IO_SORT_FACTOR_DEFAULT */
public static final int IO_SORT_FACTOR_DEFAULT = 100;
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String IO_SERIALIZATIONS_KEY = "io.serializations";
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String TFILE_IO_CHUNK_SIZE_KEY = "tfile.io.chunk.size";
/** Default value for TFILE_IO_CHUNK_SIZE_DEFAULT */
public static final int TFILE_IO_CHUNK_SIZE_DEFAULT = 1024*1024;
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String TFILE_FS_INPUT_BUFFER_SIZE_KEY =
"tfile.fs.input.buffer.size";
/** Default value for TFILE_FS_INPUT_BUFFER_SIZE_KEY */
public static final int TFILE_FS_INPUT_BUFFER_SIZE_DEFAULT = 256*1024;
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String TFILE_FS_OUTPUT_BUFFER_SIZE_KEY =
"tfile.fs.output.buffer.size";
/** Default value for TFILE_FS_OUTPUT_BUFFER_SIZE_KEY */
public static final int TFILE_FS_OUTPUT_BUFFER_SIZE_DEFAULT = 256*1024;
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String IPC_CLIENT_CONNECTION_MAXIDLETIME_KEY =
"ipc.client.connection.maxidletime";
/** Default value for IPC_CLIENT_CONNECTION_MAXIDLETIME_KEY */
public static final int IPC_CLIENT_CONNECTION_MAXIDLETIME_DEFAULT = 10000;
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String IPC_CLIENT_CONNECT_MAX_RETRIES_KEY =
"ipc.client.connect.max.retries";
/** Default value for IPC_CLIENT_CONNECT_MAX_RETRIES_KEY */
public static final int IPC_CLIENT_CONNECT_MAX_RETRIES_DEFAULT = 10;
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String IPC_CLIENT_TCPNODELAY_KEY =
"ipc.client.tcpnodelay";
/** Defalt value for IPC_CLIENT_TCPNODELAY_KEY */
public static final boolean IPC_CLIENT_TCPNODELAY_DEFAULT = false;
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String IPC_SERVER_LISTEN_QUEUE_SIZE_KEY =
"ipc.server.listen.queue.size";
/** Default value for IPC_SERVER_LISTEN_QUEUE_SIZE_KEY */
public static final int IPC_SERVER_LISTEN_QUEUE_SIZE_DEFAULT = 128;
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String IPC_CLIENT_KILL_MAX_KEY = "ipc.client.kill.max";
/** Default value for IPC_CLIENT_KILL_MAX_KEY */
public static final int IPC_CLIENT_KILL_MAX_DEFAULT = 10;
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String IPC_CLIENT_IDLETHRESHOLD_KEY =
"ipc.client.idlethreshold";
/** Default value for IPC_CLIENT_IDLETHRESHOLD_DEFAULT */
public static final int IPC_CLIENT_IDLETHRESHOLD_DEFAULT = 4000;
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String IPC_SERVER_TCPNODELAY_KEY =
"ipc.server.tcpnodelay";
/** Default value for IPC_SERVER_TCPNODELAY_KEY */
public static final boolean IPC_SERVER_TCPNODELAY_DEFAULT = false;
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String HADOOP_RPC_SOCKET_FACTORY_CLASS_DEFAULT_KEY =
"hadoop.rpc.socket.factory.class.default";
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String HADOOP_SOCKS_SERVER_KEY = "hadoop.socks.server";
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String HADOOP_UTIL_HASH_TYPE_KEY =
"hadoop.util.hash.type";
/** Default value for HADOOP_UTIL_HASH_TYPE_KEY */
public static final String HADOOP_UTIL_HASH_TYPE_DEFAULT = "murmur";
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String HADOOP_SECURITY_GROUP_MAPPING =
"hadoop.security.group.mapping";
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String HADOOP_SECURITY_GROUPS_CACHE_SECS =
"hadoop.security.groups.cache.secs";
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String HADOOP_SECURITY_AUTHENTICATION =
"hadoop.security.authentication";
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String HADOOP_SECURITY_AUTHORIZATION =
"hadoop.security.authorization";
/** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */
public static final String HADOOP_SECURITY_SERVICE_USER_NAME_KEY =
"hadoop.security.service.user.name.key";
}