001/** 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018 019package org.apache.hadoop.fs; 020 021import org.apache.hadoop.classification.InterfaceAudience; 022 023/** 024 * This class contains constants for configuration keys used 025 * in the common code. 026 * 027 * It includes all publicly documented configuration keys. In general 028 * this class should not be used directly (use CommonConfigurationKeys 029 * instead) 030 * 031 */ 032 033@InterfaceAudience.Public 034public class CommonConfigurationKeysPublic { 035 036 // The Keys 037 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 038 public static final String IO_NATIVE_LIB_AVAILABLE_KEY = 039 "io.native.lib.available"; 040 /** Default value for IO_NATIVE_LIB_AVAILABLE_KEY */ 041 public static final boolean IO_NATIVE_LIB_AVAILABLE_DEFAULT = true; 042 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 043 public static final String NET_TOPOLOGY_SCRIPT_NUMBER_ARGS_KEY = 044 "net.topology.script.number.args"; 045 /** Default value for NET_TOPOLOGY_SCRIPT_NUMBER_ARGS_KEY */ 046 public static final int NET_TOPOLOGY_SCRIPT_NUMBER_ARGS_DEFAULT = 100; 047 048 //FS keys 049 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 050 public static final String FS_DEFAULT_NAME_KEY = "fs.defaultFS"; 051 /** Default value for FS_DEFAULT_NAME_KEY */ 052 public static final String FS_DEFAULT_NAME_DEFAULT = "file:///"; 053 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 054 public static final String FS_DF_INTERVAL_KEY = "fs.df.interval"; 055 /** Default value for FS_DF_INTERVAL_KEY */ 056 public static final long FS_DF_INTERVAL_DEFAULT = 60000; 057 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 058 public static final String FS_DU_INTERVAL_KEY = "fs.du.interval"; 059 /** Default value for FS_DU_INTERVAL_KEY */ 060 public static final long FS_DU_INTERVAL_DEFAULT = 600000; 061 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 062 public static final String FS_CLIENT_RESOLVE_REMOTE_SYMLINKS_KEY = 063 "fs.client.resolve.remote.symlinks"; 064 /** Default value for FS_CLIENT_RESOLVE_REMOTE_SYMLINKS_KEY */ 065 public static final boolean FS_CLIENT_RESOLVE_REMOTE_SYMLINKS_DEFAULT = true; 066 067 068 //Defaults are not specified for following keys 069 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 070 public static final String NET_TOPOLOGY_SCRIPT_FILE_NAME_KEY = 071 "net.topology.script.file.name"; 072 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 073 public static final String NET_TOPOLOGY_NODE_SWITCH_MAPPING_IMPL_KEY = 074 "net.topology.node.switch.mapping.impl"; 075 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 076 public static final String NET_TOPOLOGY_IMPL_KEY = 077 "net.topology.impl"; 078 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 079 public static final String NET_TOPOLOGY_TABLE_MAPPING_FILE_KEY = 080 "net.topology.table.file.name"; 081 public static final String NET_DEPENDENCY_SCRIPT_FILE_NAME_KEY = 082 "net.topology.dependency.script.file.name"; 083 084 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 085 public static final String FS_TRASH_CHECKPOINT_INTERVAL_KEY = 086 "fs.trash.checkpoint.interval"; 087 /** Default value for FS_TRASH_CHECKPOINT_INTERVAL_KEY */ 088 public static final long FS_TRASH_CHECKPOINT_INTERVAL_DEFAULT = 0; 089 090 // TBD: Code is still using hardcoded values (e.g. "fs.automatic.close") 091 // instead of constant (e.g. FS_AUTOMATIC_CLOSE_KEY) 092 // 093 /** Not used anywhere, looks like default value for FS_LOCAL_BLOCK_SIZE */ 094 public static final long FS_LOCAL_BLOCK_SIZE_DEFAULT = 32*1024*1024; 095 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 096 public static final String FS_AUTOMATIC_CLOSE_KEY = "fs.automatic.close"; 097 /** Default value for FS_AUTOMATIC_CLOSE_KEY */ 098 public static final boolean FS_AUTOMATIC_CLOSE_DEFAULT = true; 099 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 100 public static final String FS_FILE_IMPL_KEY = "fs.file.impl"; 101 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 102 public static final String FS_FTP_HOST_KEY = "fs.ftp.host"; 103 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 104 public static final String FS_FTP_HOST_PORT_KEY = "fs.ftp.host.port"; 105 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 106 public static final String FS_TRASH_INTERVAL_KEY = "fs.trash.interval"; 107 /** Default value for FS_TRASH_INTERVAL_KEY */ 108 public static final long FS_TRASH_INTERVAL_DEFAULT = 0; 109 110 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 111 public static final String IO_MAPFILE_BLOOM_SIZE_KEY = 112 "io.mapfile.bloom.size"; 113 /** Default value for IO_MAPFILE_BLOOM_SIZE_KEY */ 114 public static final int IO_MAPFILE_BLOOM_SIZE_DEFAULT = 1024*1024; 115 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 116 public static final String IO_MAPFILE_BLOOM_ERROR_RATE_KEY = 117 "io.mapfile.bloom.error.rate" ; 118 /** Default value for IO_MAPFILE_BLOOM_ERROR_RATE_KEY */ 119 public static final float IO_MAPFILE_BLOOM_ERROR_RATE_DEFAULT = 0.005f; 120 /** Codec class that implements Lzo compression algorithm */ 121 public static final String IO_COMPRESSION_CODEC_LZO_CLASS_KEY = 122 "io.compression.codec.lzo.class"; 123 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 124 public static final String IO_MAP_INDEX_INTERVAL_KEY = 125 "io.map.index.interval"; 126 /** Default value for IO_MAP_INDEX_INTERVAL_DEFAULT */ 127 public static final int IO_MAP_INDEX_INTERVAL_DEFAULT = 128; 128 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 129 public static final String IO_MAP_INDEX_SKIP_KEY = "io.map.index.skip"; 130 /** Default value for IO_MAP_INDEX_SKIP_KEY */ 131 public static final int IO_MAP_INDEX_SKIP_DEFAULT = 0; 132 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 133 public static final String IO_SEQFILE_COMPRESS_BLOCKSIZE_KEY = 134 "io.seqfile.compress.blocksize"; 135 /** Default value for IO_SEQFILE_COMPRESS_BLOCKSIZE_KEY */ 136 public static final int IO_SEQFILE_COMPRESS_BLOCKSIZE_DEFAULT = 1000000; 137 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 138 public static final String IO_FILE_BUFFER_SIZE_KEY = 139 "io.file.buffer.size"; 140 /** Default value for IO_FILE_BUFFER_SIZE_KEY */ 141 public static final int IO_FILE_BUFFER_SIZE_DEFAULT = 4096; 142 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 143 public static final String IO_SKIP_CHECKSUM_ERRORS_KEY = 144 "io.skip.checksum.errors"; 145 /** Default value for IO_SKIP_CHECKSUM_ERRORS_KEY */ 146 public static final boolean IO_SKIP_CHECKSUM_ERRORS_DEFAULT = false; 147 /** 148 * @deprecated Moved to mapreduce, see mapreduce.task.io.sort.mb 149 * in mapred-default.xml 150 * See https://issues.apache.org/jira/browse/HADOOP-6801 151 */ 152 public static final String IO_SORT_MB_KEY = "io.sort.mb"; 153 /** Default value for IO_SORT_MB_DEFAULT */ 154 public static final int IO_SORT_MB_DEFAULT = 100; 155 /** 156 * @deprecated Moved to mapreduce, see mapreduce.task.io.sort.factor 157 * in mapred-default.xml 158 * See https://issues.apache.org/jira/browse/HADOOP-6801 159 */ 160 public static final String IO_SORT_FACTOR_KEY = "io.sort.factor"; 161 /** Default value for IO_SORT_FACTOR_DEFAULT */ 162 public static final int IO_SORT_FACTOR_DEFAULT = 100; 163 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 164 public static final String IO_SERIALIZATIONS_KEY = "io.serializations"; 165 166 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 167 public static final String TFILE_IO_CHUNK_SIZE_KEY = "tfile.io.chunk.size"; 168 /** Default value for TFILE_IO_CHUNK_SIZE_DEFAULT */ 169 public static final int TFILE_IO_CHUNK_SIZE_DEFAULT = 1024*1024; 170 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 171 public static final String TFILE_FS_INPUT_BUFFER_SIZE_KEY = 172 "tfile.fs.input.buffer.size"; 173 /** Default value for TFILE_FS_INPUT_BUFFER_SIZE_KEY */ 174 public static final int TFILE_FS_INPUT_BUFFER_SIZE_DEFAULT = 256*1024; 175 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 176 public static final String TFILE_FS_OUTPUT_BUFFER_SIZE_KEY = 177 "tfile.fs.output.buffer.size"; 178 /** Default value for TFILE_FS_OUTPUT_BUFFER_SIZE_KEY */ 179 public static final int TFILE_FS_OUTPUT_BUFFER_SIZE_DEFAULT = 256*1024; 180 181 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 182 public static final String IPC_CLIENT_CONNECTION_MAXIDLETIME_KEY = 183 "ipc.client.connection.maxidletime"; 184 /** Default value for IPC_CLIENT_CONNECTION_MAXIDLETIME_KEY */ 185 public static final int IPC_CLIENT_CONNECTION_MAXIDLETIME_DEFAULT = 10000; // 10s 186 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 187 public static final String IPC_CLIENT_CONNECT_TIMEOUT_KEY = 188 "ipc.client.connect.timeout"; 189 /** Default value for IPC_CLIENT_CONNECT_TIMEOUT_KEY */ 190 public static final int IPC_CLIENT_CONNECT_TIMEOUT_DEFAULT = 20000; // 20s 191 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 192 public static final String IPC_CLIENT_CONNECT_MAX_RETRIES_KEY = 193 "ipc.client.connect.max.retries"; 194 /** Default value for IPC_CLIENT_CONNECT_MAX_RETRIES_KEY */ 195 public static final int IPC_CLIENT_CONNECT_MAX_RETRIES_DEFAULT = 10; 196 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 197 public static final String IPC_CLIENT_CONNECT_RETRY_INTERVAL_KEY = 198 "ipc.client.connect.retry.interval"; 199 /** Default value for IPC_CLIENT_CONNECT_RETRY_INTERVAL_KEY */ 200 public static final int IPC_CLIENT_CONNECT_RETRY_INTERVAL_DEFAULT = 1000; 201 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 202 public static final String IPC_CLIENT_CONNECT_MAX_RETRIES_ON_SOCKET_TIMEOUTS_KEY = 203 "ipc.client.connect.max.retries.on.timeouts"; 204 /** Default value for IPC_CLIENT_CONNECT_MAX_RETRIES_ON_SOCKET_TIMEOUTS_KEY */ 205 public static final int IPC_CLIENT_CONNECT_MAX_RETRIES_ON_SOCKET_TIMEOUTS_DEFAULT = 45; 206 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 207 public static final String IPC_CLIENT_TCPNODELAY_KEY = 208 "ipc.client.tcpnodelay"; 209 /** Defalt value for IPC_CLIENT_TCPNODELAY_KEY */ 210 public static final boolean IPC_CLIENT_TCPNODELAY_DEFAULT = true; 211 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 212 public static final String IPC_SERVER_LISTEN_QUEUE_SIZE_KEY = 213 "ipc.server.listen.queue.size"; 214 /** Default value for IPC_SERVER_LISTEN_QUEUE_SIZE_KEY */ 215 public static final int IPC_SERVER_LISTEN_QUEUE_SIZE_DEFAULT = 128; 216 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 217 public static final String IPC_CLIENT_KILL_MAX_KEY = "ipc.client.kill.max"; 218 /** Default value for IPC_CLIENT_KILL_MAX_KEY */ 219 public static final int IPC_CLIENT_KILL_MAX_DEFAULT = 10; 220 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 221 public static final String IPC_CLIENT_IDLETHRESHOLD_KEY = 222 "ipc.client.idlethreshold"; 223 /** Default value for IPC_CLIENT_IDLETHRESHOLD_DEFAULT */ 224 public static final int IPC_CLIENT_IDLETHRESHOLD_DEFAULT = 4000; 225 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 226 public static final String IPC_SERVER_TCPNODELAY_KEY = 227 "ipc.server.tcpnodelay"; 228 /** Default value for IPC_SERVER_TCPNODELAY_KEY */ 229 public static final boolean IPC_SERVER_TCPNODELAY_DEFAULT = true; 230 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 231 public static final String IPC_SERVER_MAX_CONNECTIONS_KEY = 232 "ipc.server.max.connections"; 233 /** Default value for IPC_SERVER_MAX_CONNECTIONS_KEY */ 234 public static final int IPC_SERVER_MAX_CONNECTIONS_DEFAULT = 0; 235 236 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 237 public static final String HADOOP_RPC_SOCKET_FACTORY_CLASS_DEFAULT_KEY = 238 "hadoop.rpc.socket.factory.class.default"; 239 public static final String HADOOP_RPC_SOCKET_FACTORY_CLASS_DEFAULT_DEFAULT = 240 "org.apache.hadoop.net.StandardSocketFactory"; 241 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 242 public static final String HADOOP_SOCKS_SERVER_KEY = "hadoop.socks.server"; 243 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 244 public static final String HADOOP_UTIL_HASH_TYPE_KEY = 245 "hadoop.util.hash.type"; 246 /** Default value for HADOOP_UTIL_HASH_TYPE_KEY */ 247 public static final String HADOOP_UTIL_HASH_TYPE_DEFAULT = "murmur"; 248 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 249 public static final String HADOOP_SECURITY_GROUP_MAPPING = 250 "hadoop.security.group.mapping"; 251 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 252 public static final String HADOOP_SECURITY_GROUPS_CACHE_SECS = 253 "hadoop.security.groups.cache.secs"; 254 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 255 public static final long HADOOP_SECURITY_GROUPS_CACHE_SECS_DEFAULT = 256 300; 257 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 258 public static final String HADOOP_SECURITY_GROUPS_NEGATIVE_CACHE_SECS = 259 "hadoop.security.groups.negative-cache.secs"; 260 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 261 public static final long HADOOP_SECURITY_GROUPS_NEGATIVE_CACHE_SECS_DEFAULT = 262 30; 263 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 264 public static final String HADOOP_SECURITY_GROUPS_CACHE_WARN_AFTER_MS = 265 "hadoop.security.groups.cache.warn.after.ms"; 266 public static final long HADOOP_SECURITY_GROUPS_CACHE_WARN_AFTER_MS_DEFAULT = 267 5000; 268 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 269 public static final String HADOOP_SECURITY_AUTHENTICATION = 270 "hadoop.security.authentication"; 271 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 272 public static final String HADOOP_SECURITY_AUTHORIZATION = 273 "hadoop.security.authorization"; 274 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 275 public static final String HADOOP_SECURITY_INSTRUMENTATION_REQUIRES_ADMIN = 276 "hadoop.security.instrumentation.requires.admin"; 277 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 278 public static final String HADOOP_SECURITY_SERVICE_USER_NAME_KEY = 279 "hadoop.security.service.user.name.key"; 280 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 281 public static final String HADOOP_SECURITY_AUTH_TO_LOCAL = 282 "hadoop.security.auth_to_local"; 283 284 @Deprecated 285 /** Only used by HttpServer. */ 286 public static final String HADOOP_SSL_ENABLED_KEY = "hadoop.ssl.enabled"; 287 @Deprecated 288 /** Only used by HttpServer. */ 289 public static final boolean HADOOP_SSL_ENABLED_DEFAULT = false; 290 291 292 // HTTP policies to be used in configuration 293 // Use HttpPolicy.name() instead 294 @Deprecated 295 public static final String HTTP_POLICY_HTTP_ONLY = "HTTP_ONLY"; 296 @Deprecated 297 public static final String HTTP_POLICY_HTTPS_ONLY = "HTTPS_ONLY"; 298 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 299 public static final String HADOOP_RPC_PROTECTION = 300 "hadoop.rpc.protection"; 301 /** Class to override Sasl Properties for a connection */ 302 public static final String HADOOP_SECURITY_SASL_PROPS_RESOLVER_CLASS = 303 "hadoop.security.saslproperties.resolver.class"; 304 public static final String HADOOP_SECURITY_CRYPTO_CODEC_CLASSES_KEY_PREFIX = 305 "hadoop.security.crypto.codec.classes"; 306 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 307 public static final String HADOOP_SECURITY_CRYPTO_CIPHER_SUITE_KEY = 308 "hadoop.security.crypto.cipher.suite"; 309 public static final String HADOOP_SECURITY_CRYPTO_CIPHER_SUITE_DEFAULT = 310 "AES/CTR/NoPadding"; 311 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 312 public static final String HADOOP_SECURITY_CRYPTO_JCE_PROVIDER_KEY = 313 "hadoop.security.crypto.jce.provider"; 314 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 315 public static final String HADOOP_SECURITY_CRYPTO_BUFFER_SIZE_KEY = 316 "hadoop.security.crypto.buffer.size"; 317 /** Defalt value for HADOOP_SECURITY_CRYPTO_BUFFER_SIZE_KEY */ 318 public static final int HADOOP_SECURITY_CRYPTO_BUFFER_SIZE_DEFAULT = 8192; 319 /** Class to override Impersonation provider */ 320 public static final String HADOOP_SECURITY_IMPERSONATION_PROVIDER_CLASS = 321 "hadoop.security.impersonation.provider.class"; 322 323 // <!-- KMSClientProvider configurations --> 324 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 325 public static final String KMS_CLIENT_ENC_KEY_CACHE_SIZE = 326 "hadoop.security.kms.client.encrypted.key.cache.size"; 327 /** Default value for KMS_CLIENT_ENC_KEY_CACHE_SIZE */ 328 public static final int KMS_CLIENT_ENC_KEY_CACHE_SIZE_DEFAULT = 500; 329 330 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 331 public static final String KMS_CLIENT_ENC_KEY_CACHE_LOW_WATERMARK = 332 "hadoop.security.kms.client.encrypted.key.cache.low-watermark"; 333 /** Default value for KMS_CLIENT_ENC_KEY_CACHE_LOW_WATERMARK */ 334 public static final float KMS_CLIENT_ENC_KEY_CACHE_LOW_WATERMARK_DEFAULT = 335 0.3f; 336 337 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 338 public static final String KMS_CLIENT_ENC_KEY_CACHE_NUM_REFILL_THREADS = 339 "hadoop.security.kms.client.encrypted.key.cache.num.refill.threads"; 340 /** Default value for KMS_CLIENT_ENC_KEY_NUM_REFILL_THREADS */ 341 public static final int KMS_CLIENT_ENC_KEY_CACHE_NUM_REFILL_THREADS_DEFAULT = 342 2; 343 344 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 345 public static final String KMS_CLIENT_ENC_KEY_CACHE_EXPIRY_MS = 346 "hadoop.security.kms.client.encrypted.key.cache.expiry"; 347 /** Default value for KMS_CLIENT_ENC_KEY_CACHE_EXPIRY (12 hrs)*/ 348 public static final int KMS_CLIENT_ENC_KEY_CACHE_EXPIRY_DEFAULT = 43200000; 349 350 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 351 public static final String HADOOP_SECURITY_JAVA_SECURE_RANDOM_ALGORITHM_KEY = 352 "hadoop.security.java.secure.random.algorithm"; 353 /** Defalt value for HADOOP_SECURITY_JAVA_SECURE_RANDOM_ALGORITHM_KEY */ 354 public static final String HADOOP_SECURITY_JAVA_SECURE_RANDOM_ALGORITHM_DEFAULT = 355 "SHA1PRNG"; 356 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 357 public static final String HADOOP_SECURITY_SECURE_RANDOM_IMPL_KEY = 358 "hadoop.security.secure.random.impl"; 359 /** See <a href="{@docRoot}/../core-default.html">core-default.xml</a> */ 360 public static final String HADOOP_SECURITY_SECURE_RANDOM_DEVICE_FILE_PATH_KEY = 361 "hadoop.security.random.device.file.path"; 362 public static final String HADOOP_SECURITY_SECURE_RANDOM_DEVICE_FILE_PATH_DEFAULT = 363 "/dev/urandom"; 364} 365