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 */ 018package org.apache.hadoop.hbase; 019 020import static org.apache.hadoop.hbase.io.hfile.BlockType.MAGIC_LENGTH; 021 022import java.nio.ByteBuffer; 023import java.nio.charset.Charset; 024import java.util.Arrays; 025import java.util.Collections; 026import java.util.List; 027import java.util.UUID; 028import java.util.regex.Pattern; 029 030import org.apache.commons.lang3.ArrayUtils; 031import org.apache.hadoop.hbase.util.Bytes; 032import org.apache.yetus.audience.InterfaceAudience; 033 034/** 035 * HConstants holds a bunch of HBase-related constants 036 */ 037@InterfaceAudience.Public 038public final class HConstants { 039 // NOTICE!!!! Please do not add a constants here, unless they are referenced by a lot of classes. 040 041 //Bytes.UTF8_ENCODING should be updated if this changed 042 /** When we encode strings, we always specify UTF8 encoding */ 043 public static final String UTF8_ENCODING = "UTF-8"; 044 045 //Bytes.UTF8_CHARSET should be updated if this changed 046 /** When we encode strings, we always specify UTF8 encoding */ 047 public static final Charset UTF8_CHARSET = Charset.forName(UTF8_ENCODING); 048 /** 049 * Default block size for an HFile. 050 */ 051 public final static int DEFAULT_BLOCKSIZE = 64 * 1024; 052 053 /** Used as a magic return value while optimized index key feature enabled(HBASE-7845) */ 054 public final static int INDEX_KEY_MAGIC = -2; 055 056 /* 057 * Name of directory that holds recovered edits written by the wal log 058 * splitting code, one per region 059 */ 060 public static final String RECOVERED_EDITS_DIR = "recovered.edits"; 061 062 /* 063 * Name of directory that holds recovered hfiles written by the wal log 064 * splitting code, one per region 065 */ 066 public static final String RECOVERED_HFILES_DIR = "recovered.hfiles"; 067 068 /** 069 * The first four bytes of Hadoop RPC connections 070 */ 071 public static final byte[] RPC_HEADER = new byte[] { 'H', 'B', 'a', 's' }; 072 public static final byte RPC_CURRENT_VERSION = 0; 073 074 // HFileBlock constants. TODO!!!! THESE DEFINES BELONG IN HFILEBLOCK, NOT UP HERE. 075 // Needed down in hbase-common though by encoders but these encoders should not be dealing 076 // in the internals of hfileblocks. Fix encapsulation. 077 078 /** The size data structures with minor version is 0 */ 079 public static final int HFILEBLOCK_HEADER_SIZE_NO_CHECKSUM = MAGIC_LENGTH + 2 * Bytes.SIZEOF_INT 080 + Bytes.SIZEOF_LONG; 081 /** The size of a version 2 HFile block header, minor version 1. 082 * There is a 1 byte checksum type, followed by a 4 byte bytesPerChecksum 083 * followed by another 4 byte value to store sizeofDataOnDisk. 084 */ 085 public static final int HFILEBLOCK_HEADER_SIZE = HFILEBLOCK_HEADER_SIZE_NO_CHECKSUM + 086 Bytes.SIZEOF_BYTE + 2 * Bytes.SIZEOF_INT; 087 /** Just an array of bytes of the right size. */ 088 public static final byte[] HFILEBLOCK_DUMMY_HEADER = new byte[HFILEBLOCK_HEADER_SIZE]; 089 090 //End HFileBlockConstants. 091 092 /** 093 * Status codes used for return values of bulk operations. 094 */ 095 @InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.COPROC) 096 public enum OperationStatusCode { 097 NOT_RUN, 098 SUCCESS, 099 BAD_FAMILY, 100 STORE_TOO_BUSY, 101 SANITY_CHECK_FAILURE, 102 FAILURE 103 } 104 105 /** long constant for zero */ 106 public static final Long ZERO_L = Long.valueOf(0L); 107 public static final String NINES = "99999999999999"; 108 public static final String ZEROES = "00000000000000"; 109 110 // For migration 111 112 /** name of version file */ 113 public static final String VERSION_FILE_NAME = "hbase.version"; 114 115 /** 116 * Current version of file system. 117 * Version 4 supports only one kind of bloom filter. 118 * Version 5 changes versions in catalog table regions. 119 * Version 6 enables blockcaching on catalog tables. 120 * Version 7 introduces hfile -- hbase 0.19 to 0.20.. 121 * Version 8 introduces namespace 122 */ 123 // public static final String FILE_SYSTEM_VERSION = "6"; 124 public static final String FILE_SYSTEM_VERSION = "8"; 125 126 // Configuration parameters 127 128 //TODO: Is having HBase homed on port 60k OK? 129 130 /** Cluster is in distributed mode or not */ 131 public static final String CLUSTER_DISTRIBUTED = "hbase.cluster.distributed"; 132 133 /** Config for pluggable load balancers */ 134 public static final String HBASE_MASTER_LOADBALANCER_CLASS = "hbase.master.loadbalancer.class"; 135 136 /** Config for balancing the cluster by table */ 137 public static final String HBASE_MASTER_LOADBALANCE_BYTABLE = "hbase.master.loadbalance.bytable"; 138 139 /** Config for the max percent of regions in transition */ 140 public static final String HBASE_MASTER_BALANCER_MAX_RIT_PERCENT = 141 "hbase.master.balancer.maxRitPercent"; 142 143 /** Default value for the max percent of regions in transition */ 144 public static final double DEFAULT_HBASE_MASTER_BALANCER_MAX_RIT_PERCENT = 1.0; 145 146 /** Config for the max balancing time */ 147 public static final String HBASE_BALANCER_MAX_BALANCING = "hbase.balancer.max.balancing"; 148 149 /** Config for the balancer period */ 150 public static final String HBASE_BALANCER_PERIOD = "hbase.balancer.period"; 151 152 /** Default value for the balancer period */ 153 public static final int DEFAULT_HBASE_BALANCER_PERIOD = 300000; 154 155 /** The name of the ensemble table */ 156 public static final TableName ENSEMBLE_TABLE_NAME = TableName.valueOf("hbase:ensemble"); 157 158 /** Config for pluggable region normalizer */ 159 public static final String HBASE_MASTER_NORMALIZER_CLASS = 160 "hbase.master.normalizer.class"; 161 162 /** Cluster is standalone or pseudo-distributed */ 163 public static final boolean CLUSTER_IS_LOCAL = false; 164 165 /** Cluster is fully-distributed */ 166 @Deprecated // unused. see HBASE-13636. remove this in 3.0 167 public static final boolean CLUSTER_IS_DISTRIBUTED = true; 168 169 /** Default value for cluster distributed mode */ 170 public static final boolean DEFAULT_CLUSTER_DISTRIBUTED = CLUSTER_IS_LOCAL; 171 172 /** default host address */ 173 public static final String DEFAULT_HOST = "0.0.0.0"; 174 175 /** Parameter name for port master listens on. */ 176 public static final String MASTER_PORT = "hbase.master.port"; 177 178 /** default port that the master listens on */ 179 public static final int DEFAULT_MASTER_PORT = 16000; 180 181 /** default port for master web api */ 182 public static final int DEFAULT_MASTER_INFOPORT = 16010; 183 184 /** Configuration key for master web API port */ 185 public static final String MASTER_INFO_PORT = "hbase.master.info.port"; 186 187 /** Configuration key for the list of master host:ports **/ 188 public static final String MASTER_ADDRS_KEY = "hbase.masters"; 189 190 /** Full class name of the Zookeeper based connection registry implementation */ 191 public static final String ZK_CONNECTION_REGISTRY_CLASS = 192 "org.apache.hadoop.hbase.client.ZKConnectionRegistry"; 193 194 /** Parameter name for the master type being backup (waits for primary to go inactive). */ 195 public static final String MASTER_TYPE_BACKUP = "hbase.master.backup"; 196 197 /** 198 * by default every master is a possible primary master unless the conf explicitly overrides it 199 */ 200 public static final boolean DEFAULT_MASTER_TYPE_BACKUP = false; 201 202 /** Name of ZooKeeper quorum configuration parameter. */ 203 public static final String ZOOKEEPER_QUORUM = "hbase.zookeeper.quorum"; 204 205 /** Name of ZooKeeper quorum configuration parameter for client to locate meta. */ 206 public static final String CLIENT_ZOOKEEPER_QUORUM = "hbase.client.zookeeper.quorum"; 207 208 /** Client port of ZooKeeper for client to locate meta */ 209 public static final String CLIENT_ZOOKEEPER_CLIENT_PORT = 210 "hbase.client.zookeeper.property.clientPort"; 211 212 /** Indicate whether the client ZK are observer nodes of the server ZK */ 213 public static final String CLIENT_ZOOKEEPER_OBSERVER_MODE = 214 "hbase.client.zookeeper.observer.mode"; 215 /** Assuming client zk not in observer mode and master need to synchronize information */ 216 public static final boolean DEFAULT_CLIENT_ZOOKEEPER_OBSERVER_MODE = false; 217 218 /** Common prefix of ZooKeeper configuration properties */ 219 public static final String ZK_CFG_PROPERTY_PREFIX = 220 "hbase.zookeeper.property."; 221 222 public static final int ZK_CFG_PROPERTY_PREFIX_LEN = 223 ZK_CFG_PROPERTY_PREFIX.length(); 224 225 /** 226 * The ZK client port key in the ZK properties map. The name reflects the 227 * fact that this is not an HBase configuration key. 228 */ 229 public static final String CLIENT_PORT_STR = "clientPort"; 230 231 /** Parameter name for the client port that the zookeeper listens on */ 232 public static final String ZOOKEEPER_CLIENT_PORT = 233 ZK_CFG_PROPERTY_PREFIX + CLIENT_PORT_STR; 234 235 /** 236 * Will be removed in hbase 3.0 237 * @deprecated use {@link #DEFAULT_ZOOKEEPER_CLIENT_PORT} instead 238 */ 239 @Deprecated 240 public static final int DEFAULT_ZOOKEPER_CLIENT_PORT = 2181; 241 242 /** Default client port that the zookeeper listens on */ 243 public static final int DEFAULT_ZOOKEEPER_CLIENT_PORT = 2181; 244 245 /** 246 * Parameter name for the wait time for the recoverable zookeeper 247 */ 248 @Deprecated // unused. see HBASE-3065. remove this in 3.0 249 public static final String ZOOKEEPER_RECOVERABLE_WAITTIME = 250 "hbase.zookeeper.recoverable.waittime"; 251 252 /** Default wait time for the recoverable zookeeper */ 253 @Deprecated // unused. see HBASE-3065. remove this in 3.0 254 public static final long DEFAULT_ZOOKEPER_RECOVERABLE_WAITIME = 10000; 255 256 /** Parameter name for the root dir in ZK for this cluster */ 257 public static final String ZOOKEEPER_ZNODE_PARENT = "zookeeper.znode.parent"; 258 259 public static final String DEFAULT_ZOOKEEPER_ZNODE_PARENT = "/hbase"; 260 261 /** 262 * Parameter name for the limit on concurrent client-side zookeeper 263 * connections 264 */ 265 public static final String ZOOKEEPER_MAX_CLIENT_CNXNS = 266 ZK_CFG_PROPERTY_PREFIX + "maxClientCnxns"; 267 268 /** Parameter name for the ZK data directory */ 269 public static final String ZOOKEEPER_DATA_DIR = 270 ZK_CFG_PROPERTY_PREFIX + "dataDir"; 271 272 /** Parameter name for the ZK tick time */ 273 public static final String ZOOKEEPER_TICK_TIME = 274 ZK_CFG_PROPERTY_PREFIX + "tickTime"; 275 276 /** 277 * Will be removed in hbase 3.0 278 * @deprecated use {@link #DEFAULT_ZOOKEEPER_MAX_CLIENT_CNXNS} instead 279 */ 280 @Deprecated 281 public static final int DEFAULT_ZOOKEPER_MAX_CLIENT_CNXNS = 300; 282 283 /** Default limit on concurrent client-side zookeeper connections */ 284 public static final int DEFAULT_ZOOKEEPER_MAX_CLIENT_CNXNS = 300; 285 286 /** Configuration key for ZooKeeper session timeout */ 287 public static final String ZK_SESSION_TIMEOUT = "zookeeper.session.timeout"; 288 289 /** Timeout for the ZK sync() call */ 290 public static final String ZK_SYNC_BLOCKING_TIMEOUT_MS = "hbase.zookeeper.sync.timeout.millis"; 291 // Choice of the default value is based on the following ZK recommendation (from docs). Keeping it 292 // lower lets the callers fail fast in case of any issues. 293 // "The clients view of the system is guaranteed to be up-to-date within a certain time bound. 294 // (On the order of tens of seconds.) Either system changes will be seen by a client within this 295 // bound, or the client will detect a service outage." 296 public static final long ZK_SYNC_BLOCKING_TIMEOUT_DEFAULT_MS = 30 * 1000; 297 298 /** Default value for ZooKeeper session timeout */ 299 public static final int DEFAULT_ZK_SESSION_TIMEOUT = 90 * 1000; 300 301 /** Parameter name for port region server listens on. */ 302 public static final String REGIONSERVER_PORT = "hbase.regionserver.port"; 303 304 /** Default port region server listens on. */ 305 public static final int DEFAULT_REGIONSERVER_PORT = 16020; 306 307 /** default port for region server web api */ 308 public static final int DEFAULT_REGIONSERVER_INFOPORT = 16030; 309 310 /** A configuration key for regionserver info port */ 311 public static final String REGIONSERVER_INFO_PORT = 312 "hbase.regionserver.info.port"; 313 314 /** A flag that enables automatic selection of regionserver info port */ 315 public static final String REGIONSERVER_INFO_PORT_AUTO = 316 REGIONSERVER_INFO_PORT + ".auto"; 317 318 /** Parameter name for what region server implementation to use. */ 319 public static final String REGION_SERVER_IMPL= "hbase.regionserver.impl"; 320 321 /** Parameter name for what master implementation to use. */ 322 public static final String MASTER_IMPL= "hbase.master.impl"; 323 324 /** Parameter name for what hbase client implementation to use. */ 325 @Deprecated // unused. see HBASE-7460. remove this in 3.0 326 public static final String HBASECLIENT_IMPL= "hbase.hbaseclient.impl"; 327 328 /** Parameter name for how often threads should wake up */ 329 public static final String THREAD_WAKE_FREQUENCY = "hbase.server.thread.wakefrequency"; 330 331 /** Default value for thread wake frequency */ 332 public static final int DEFAULT_THREAD_WAKE_FREQUENCY = 10 * 1000; 333 334 /** Parameter name for how often we should try to write a version file, before failing */ 335 public static final String VERSION_FILE_WRITE_ATTEMPTS = "hbase.server.versionfile.writeattempts"; 336 337 /** Parameter name for how often we should try to write a version file, before failing */ 338 public static final int DEFAULT_VERSION_FILE_WRITE_ATTEMPTS = 3; 339 340 /** Parameter name and default value for how often a region should perform a major compaction */ 341 public static final String MAJOR_COMPACTION_PERIOD = "hbase.hregion.majorcompaction"; 342 public static final long DEFAULT_MAJOR_COMPACTION_PERIOD = 1000 * 60 * 60 * 24 * 7; // 7 days 343 344 /** 345 * Parameter name and default value for major compaction jitter. 346 * Used as a multiplier applied to {@link HConstants#MAJOR_COMPACTION_PERIOD} 347 * to cause compaction to occur a given amount of time either side of 348 * {@link HConstants#MAJOR_COMPACTION_PERIOD}. 349 * Default to 0.5 so jitter has us fall evenly either side of when the compaction should run. 350 */ 351 public static final String MAJOR_COMPACTION_JITTER = "hbase.hregion.majorcompaction.jitter"; 352 public static final float DEFAULT_MAJOR_COMPACTION_JITTER = 0.50F; 353 354 /** Parameter name for the maximum batch of KVs to be used in flushes and compactions */ 355 public static final String COMPACTION_KV_MAX = "hbase.hstore.compaction.kv.max"; 356 public static final int COMPACTION_KV_MAX_DEFAULT = 10; 357 358 /** Parameter name for HBase instance root directory */ 359 public static final String HBASE_DIR = "hbase.rootdir"; 360 361 /** Parameter name for HBase client IPC pool type */ 362 public static final String HBASE_CLIENT_IPC_POOL_TYPE = "hbase.client.ipc.pool.type"; 363 364 /** Parameter name for HBase client IPC pool size */ 365 public static final String HBASE_CLIENT_IPC_POOL_SIZE = "hbase.client.ipc.pool.size"; 366 367 /** Parameter name for HBase client operation timeout. */ 368 public static final String HBASE_CLIENT_OPERATION_TIMEOUT = "hbase.client.operation.timeout"; 369 370 /** Parameter name for HBase client meta operation timeout. */ 371 public static final String HBASE_CLIENT_META_OPERATION_TIMEOUT = 372 "hbase.client.meta.operation.timeout"; 373 374 /** Default HBase client operation timeout, which is tantamount to a blocking call */ 375 public static final int DEFAULT_HBASE_CLIENT_OPERATION_TIMEOUT = 1200000; 376 377 /** Parameter name for HBase client meta replica scan call timeout. */ 378 public static final String HBASE_CLIENT_META_REPLICA_SCAN_TIMEOUT = 379 "hbase.client.meta.replica.scan.timeout"; 380 381 /** Default HBase client meta replica scan call timeout, 1 second */ 382 public static final int HBASE_CLIENT_META_REPLICA_SCAN_TIMEOUT_DEFAULT = 1000000; 383 384 /** Used to construct the name of the log directory for a region server */ 385 public static final String HREGION_LOGDIR_NAME = "WALs"; 386 387 /** Used to construct the name of the splitlog directory for a region server */ 388 public static final String SPLIT_LOGDIR_NAME = "splitWAL"; 389 390 /** Like the previous, but for old logs that are about to be deleted */ 391 public static final String HREGION_OLDLOGDIR_NAME = "oldWALs"; 392 393 /** Staging dir used by bulk load */ 394 public static final String BULKLOAD_STAGING_DIR_NAME = "staging"; 395 396 public static final String CORRUPT_DIR_NAME = "corrupt"; 397 398 /** Used by HBCK to sideline backup data */ 399 public static final String HBCK_SIDELINEDIR_NAME = ".hbck"; 400 401 /** Any artifacts left from migration can be moved here */ 402 public static final String MIGRATION_NAME = ".migration"; 403 404 /** 405 * The directory from which co-processor/custom filter jars can be loaded 406 * dynamically by the region servers. This value can be overridden by the 407 * hbase.dynamic.jars.dir config. 408 */ 409 @Deprecated // unused. see HBASE-12054. remove this in 3.0 410 public static final String LIB_DIR = "lib"; 411 412 /** Used to construct the name of the compaction directory during compaction */ 413 public static final String HREGION_COMPACTIONDIR_NAME = "compaction.dir"; 414 415 /** Conf key for the max file size after which we split the region */ 416 public static final String HREGION_MAX_FILESIZE = 417 "hbase.hregion.max.filesize"; 418 419 /** Default maximum file size */ 420 public static final long DEFAULT_MAX_FILE_SIZE = 10 * 1024 * 1024 * 1024L; 421 422 /** 423 * Max size of single row for Get's or Scan's without in-row scanning flag set. 424 */ 425 public static final String TABLE_MAX_ROWSIZE_KEY = "hbase.table.max.rowsize"; 426 427 /** 428 * Default max row size (1 Gb). 429 */ 430 public static final long TABLE_MAX_ROWSIZE_DEFAULT = 1024 * 1024 * 1024L; 431 432 /** 433 * The max number of threads used for opening and closing stores or store 434 * files in parallel 435 */ 436 public static final String HSTORE_OPEN_AND_CLOSE_THREADS_MAX = 437 "hbase.hstore.open.and.close.threads.max"; 438 439 /** 440 * The default number for the max number of threads used for opening and 441 * closing stores or store files in parallel 442 */ 443 public static final int DEFAULT_HSTORE_OPEN_AND_CLOSE_THREADS_MAX = 1; 444 445 /** 446 * Block updates if memstore has hbase.hregion.memstore.block.multiplier 447 * times hbase.hregion.memstore.flush.size bytes. Useful preventing 448 * runaway memstore during spikes in update traffic. 449 */ 450 public static final String HREGION_MEMSTORE_BLOCK_MULTIPLIER = 451 "hbase.hregion.memstore.block.multiplier"; 452 453 /** 454 * Default value for hbase.hregion.memstore.block.multiplier 455 */ 456 public static final int DEFAULT_HREGION_MEMSTORE_BLOCK_MULTIPLIER = 4; 457 458 /** Conf key for the memstore size at which we flush the memstore */ 459 public static final String HREGION_MEMSTORE_FLUSH_SIZE = 460 "hbase.hregion.memstore.flush.size"; 461 462 public static final String HREGION_EDITS_REPLAY_SKIP_ERRORS = 463 "hbase.hregion.edits.replay.skip.errors"; 464 465 public static final boolean DEFAULT_HREGION_EDITS_REPLAY_SKIP_ERRORS = 466 false; 467 468 /** Maximum value length, enforced on KeyValue construction */ 469 public static final int MAXIMUM_VALUE_LENGTH = Integer.MAX_VALUE - 1; 470 471 /** name of the file for unique cluster ID */ 472 public static final String CLUSTER_ID_FILE_NAME = "hbase.id"; 473 474 /** Default value for cluster ID */ 475 public static final String CLUSTER_ID_DEFAULT = "default-cluster"; 476 477 /** Parameter name for # days to keep MVCC values during a major compaction */ 478 public static final String KEEP_SEQID_PERIOD = "hbase.hstore.compaction.keep.seqId.period"; 479 /** At least to keep MVCC values in hfiles for 5 days */ 480 public static final int MIN_KEEP_SEQID_PERIOD = 5; 481 482 // Always store the location of the root table's HRegion. 483 // This HRegion is never split. 484 485 // region name = table + startkey + regionid. This is the row key. 486 // each row in the root and meta tables describes exactly 1 region 487 // Do we ever need to know all the information that we are storing? 488 489 // Note that the name of the root table starts with "-" and the name of the 490 // meta table starts with "." Why? it's a trick. It turns out that when we 491 // store region names in memory, we use a SortedMap. Since "-" sorts before 492 // "." (and since no other table name can start with either of these 493 // characters, the root region will always be the first entry in such a Map, 494 // followed by all the meta regions (which will be ordered by their starting 495 // row key as well), followed by all user tables. So when the Master is 496 // choosing regions to assign, it will always choose the root region first, 497 // followed by the meta regions, followed by user regions. Since the root 498 // and meta regions always need to be on-line, this ensures that they will 499 // be the first to be reassigned if the server(s) they are being served by 500 // should go down. 501 502 public static final String BASE_NAMESPACE_DIR = "data"; 503 504 /** delimiter used between portions of a region name */ 505 public static final int META_ROW_DELIMITER = ','; 506 507 /** The catalog family as a string*/ 508 public static final String CATALOG_FAMILY_STR = "info"; 509 510 /** The catalog family */ 511 public static final byte [] CATALOG_FAMILY = Bytes.toBytes(CATALOG_FAMILY_STR); 512 513 /** The RegionInfo qualifier as a string */ 514 public static final String REGIONINFO_QUALIFIER_STR = "regioninfo"; 515 516 /** The regioninfo column qualifier */ 517 public static final byte [] REGIONINFO_QUALIFIER = Bytes.toBytes(REGIONINFO_QUALIFIER_STR); 518 519 /** The server column qualifier */ 520 public static final String SERVER_QUALIFIER_STR = "server"; 521 /** The server column qualifier */ 522 public static final byte [] SERVER_QUALIFIER = Bytes.toBytes(SERVER_QUALIFIER_STR); 523 524 /** The startcode column qualifier */ 525 public static final String STARTCODE_QUALIFIER_STR = "serverstartcode"; 526 /** The startcode column qualifier */ 527 public static final byte [] STARTCODE_QUALIFIER = Bytes.toBytes(STARTCODE_QUALIFIER_STR); 528 529 /** The open seqnum column qualifier */ 530 public static final String SEQNUM_QUALIFIER_STR = "seqnumDuringOpen"; 531 /** The open seqnum column qualifier */ 532 public static final byte [] SEQNUM_QUALIFIER = Bytes.toBytes(SEQNUM_QUALIFIER_STR); 533 534 /** The state column qualifier */ 535 public static final String STATE_QUALIFIER_STR = "state"; 536 537 public static final byte [] STATE_QUALIFIER = Bytes.toBytes(STATE_QUALIFIER_STR); 538 539 /** 540 * The serverName column qualifier. Its the server where the region is 541 * transitioning on, while column server is the server where the region is 542 * opened on. They are the same when the region is in state OPEN. 543 */ 544 public static final String SERVERNAME_QUALIFIER_STR = "sn"; 545 546 public static final byte [] SERVERNAME_QUALIFIER = Bytes.toBytes(SERVERNAME_QUALIFIER_STR); 547 548 /** The lower-half split region column qualifier string. */ 549 public static final String SPLITA_QUALIFIER_STR = "splitA"; 550 /** The lower-half split region column qualifier */ 551 public static final byte [] SPLITA_QUALIFIER = Bytes.toBytes(SPLITA_QUALIFIER_STR); 552 553 /** The upper-half split region column qualifier String. */ 554 public static final String SPLITB_QUALIFIER_STR = "splitB"; 555 /** The upper-half split region column qualifier */ 556 public static final byte [] SPLITB_QUALIFIER = Bytes.toBytes(SPLITB_QUALIFIER_STR); 557 558 /** 559 * Merge qualifier prefix. 560 * We used to only allow two regions merge; mergeA and mergeB. 561 * Now we allow many to merge. Each region to merge will be referenced 562 * in a column whose qualifier starts with this define. 563 */ 564 public static final String MERGE_QUALIFIER_PREFIX_STR = "merge"; 565 public static final byte [] MERGE_QUALIFIER_PREFIX = 566 Bytes.toBytes(MERGE_QUALIFIER_PREFIX_STR); 567 568 /** 569 * The lower-half merge region column qualifier 570 * @deprecated Since 2.3.0 and 2.2.1. Not used anymore. Instead we look for 571 * the {@link #MERGE_QUALIFIER_PREFIX_STR} prefix. 572 */ 573 @Deprecated 574 public static final byte[] MERGEA_QUALIFIER = Bytes.toBytes(MERGE_QUALIFIER_PREFIX_STR + "A"); 575 576 /** 577 * The upper-half merge region column qualifier 578 * @deprecated Since 2.3.0 and 2.2.1. Not used anymore. Instead we look for 579 * the {@link #MERGE_QUALIFIER_PREFIX_STR} prefix. 580 */ 581 @Deprecated 582 public static final byte[] MERGEB_QUALIFIER = Bytes.toBytes(MERGE_QUALIFIER_PREFIX_STR + "B"); 583 584 /** The catalog family as a string*/ 585 public static final String TABLE_FAMILY_STR = "table"; 586 587 /** The catalog family */ 588 public static final byte [] TABLE_FAMILY = Bytes.toBytes(TABLE_FAMILY_STR); 589 590 /** The serialized table state qualifier */ 591 public static final byte[] TABLE_STATE_QUALIFIER = Bytes.toBytes("state"); 592 593 /** The replication barrier family as a string*/ 594 public static final String REPLICATION_BARRIER_FAMILY_STR = "rep_barrier"; 595 596 /** The replication barrier family */ 597 public static final byte[] REPLICATION_BARRIER_FAMILY = 598 Bytes.toBytes(REPLICATION_BARRIER_FAMILY_STR); 599 600 /** 601 * The meta table version column qualifier. 602 * We keep current version of the meta table in this column in <code>-ROOT-</code> 603 * table: i.e. in the 'info:v' column. 604 */ 605 public static final byte [] META_VERSION_QUALIFIER = Bytes.toBytes("v"); 606 607 /** 608 * The current version of the meta table. 609 * - pre-hbase 0.92. There is no META_VERSION column in the root table 610 * in this case. The meta has HTableDescriptor serialized into the HRegionInfo; 611 * - version 0 is 0.92 and 0.94. Meta data has serialized HRegionInfo's using 612 * Writable serialization, and HRegionInfo's does not contain HTableDescriptors. 613 * - version 1 for 0.96+ keeps HRegionInfo data structures, but changes the 614 * byte[] serialization from Writables to Protobuf. 615 * See HRegionInfo.VERSION 616 */ 617 public static final short META_VERSION = 1; 618 619 // Other constants 620 621 /** 622 * An empty byte array instance. 623 */ 624 public static final byte [] EMPTY_BYTE_ARRAY = new byte [0]; 625 626 /** 627 * An empty string instance. 628 */ 629 public static final String EMPTY_STRING = ""; 630 631 public static final ByteBuffer EMPTY_BYTE_BUFFER = ByteBuffer.wrap(EMPTY_BYTE_ARRAY); 632 633 /** 634 * Used by scanners, etc when they want to start at the beginning of a region 635 */ 636 public static final byte [] EMPTY_START_ROW = EMPTY_BYTE_ARRAY; 637 638 /** 639 * Last row in a table. 640 */ 641 public static final byte [] EMPTY_END_ROW = EMPTY_START_ROW; 642 643 /** 644 * Used by scanners and others when they're trying to detect the end of a 645 * table 646 */ 647 public static final byte [] LAST_ROW = EMPTY_BYTE_ARRAY; 648 649 /** 650 * Max length a row can have because of the limitation in TFile. 651 */ 652 public static final int MAX_ROW_LENGTH = Short.MAX_VALUE; 653 654 /** 655 * Timestamp to use when we want to refer to the latest cell. 656 * This is the timestamp sent by clients when no timestamp is specified on 657 * commit. 658 */ 659 public static final long LATEST_TIMESTAMP = Long.MAX_VALUE; 660 661 /** 662 * Timestamp to use when we want to refer to the oldest cell. 663 * Special! Used in fake Cells only. Should never be the timestamp on an actual Cell returned to 664 * a client. 665 * @deprecated Should not be public since hbase-1.3.0. For internal use only. Move internal to 666 * Scanners flagged as special timestamp value never to be returned as timestamp on a Cell. 667 */ 668 @Deprecated 669 public static final long OLDEST_TIMESTAMP = Long.MIN_VALUE; 670 671 /** 672 * LATEST_TIMESTAMP in bytes form 673 */ 674 public static final byte [] LATEST_TIMESTAMP_BYTES = { 675 // big-endian 676 (byte) (LATEST_TIMESTAMP >>> 56), 677 (byte) (LATEST_TIMESTAMP >>> 48), 678 (byte) (LATEST_TIMESTAMP >>> 40), 679 (byte) (LATEST_TIMESTAMP >>> 32), 680 (byte) (LATEST_TIMESTAMP >>> 24), 681 (byte) (LATEST_TIMESTAMP >>> 16), 682 (byte) (LATEST_TIMESTAMP >>> 8), 683 (byte) LATEST_TIMESTAMP, 684 }; 685 686 /** 687 * Define for 'return-all-versions'. 688 */ 689 public static final int ALL_VERSIONS = Integer.MAX_VALUE; 690 691 /** 692 * Unlimited time-to-live. 693 */ 694// public static final int FOREVER = -1; 695 public static final int FOREVER = Integer.MAX_VALUE; 696 697 /** 698 * Seconds in a week 699 */ 700 @Deprecated // unused. see HBASE-2692. remove this in 3.0 701 public static final int WEEK_IN_SECONDS = 7 * 24 * 3600; 702 703 /** 704 * Seconds in a day, hour and minute 705 */ 706 public static final int DAY_IN_SECONDS = 24 * 60 * 60; 707 public static final int HOUR_IN_SECONDS = 60 * 60; 708 public static final int MINUTE_IN_SECONDS = 60; 709 710 //TODO: although the following are referenced widely to format strings for 711 // the shell. They really aren't a part of the public API. It would be 712 // nice if we could put them somewhere where they did not need to be 713 // public. They could have package visibility 714 public static final String NAME = "NAME"; 715 public static final String VERSIONS = "VERSIONS"; 716 public static final String IN_MEMORY = "IN_MEMORY"; 717 public static final String METADATA = "METADATA"; 718 public static final String CONFIGURATION = "CONFIGURATION"; 719 720 /** 721 * Retrying we multiply hbase.client.pause setting by what we have in this array until we 722 * run out of array items. Retries beyond this use the last number in the array. So, for 723 * example, if hbase.client.pause is 1 second, and maximum retries count 724 * hbase.client.retries.number is 10, we will retry at the following intervals: 725 * 1, 2, 3, 5, 10, 20, 40, 100, 100, 100. 726 * With 100ms, a back-off of 200 means 20s 727 */ 728 public static final int [] RETRY_BACKOFF = {1, 2, 3, 5, 10, 20, 40, 100, 100, 100, 100, 200, 200}; 729 730 public static final String REGION_IMPL = "hbase.hregion.impl"; 731 732 /** 733 * Scope tag for locally scoped data. 734 * This data will not be replicated. 735 */ 736 public static final int REPLICATION_SCOPE_LOCAL = 0; 737 738 /** 739 * Scope tag for globally scoped data. 740 * This data will be replicated to all peers. 741 */ 742 public static final int REPLICATION_SCOPE_GLOBAL = 1; 743 744 /** 745 * Default cluster ID, cannot be used to identify a cluster so a key with 746 * this value means it wasn't meant for replication. 747 */ 748 public static final UUID DEFAULT_CLUSTER_ID = new UUID(0L,0L); 749 750 /** 751 * Parameter name for maximum number of bytes returned when calling a scanner's next method. 752 * Controlled by the client. 753 */ 754 public static final String HBASE_CLIENT_SCANNER_MAX_RESULT_SIZE_KEY = 755 "hbase.client.scanner.max.result.size"; 756 757 /** 758 * Parameter name for maximum number of bytes returned when calling a scanner's next method. 759 * Controlled by the server. 760 */ 761 public static final String HBASE_SERVER_SCANNER_MAX_RESULT_SIZE_KEY = 762 "hbase.server.scanner.max.result.size"; 763 764 /** 765 * Maximum number of bytes returned when calling a scanner's next method. 766 * Note that when a single row is larger than this limit the row is still 767 * returned completely. 768 * 769 * The default value is 2MB. 770 */ 771 public static final long DEFAULT_HBASE_CLIENT_SCANNER_MAX_RESULT_SIZE = 2 * 1024 * 1024; 772 773 /** 774 * Maximum number of bytes returned when calling a scanner's next method. 775 * Note that when a single row is larger than this limit the row is still 776 * returned completely. 777 * Safety setting to protect the region server. 778 * 779 * The default value is 100MB. (a client would rarely request larger chunks on purpose) 780 */ 781 public static final long DEFAULT_HBASE_SERVER_SCANNER_MAX_RESULT_SIZE = 100 * 1024 * 1024; 782 783 /** 784 * Parameter name for client pause value, used mostly as value to wait 785 * before running a retry of a failed get, region lookup, etc. 786 */ 787 public static final String HBASE_CLIENT_PAUSE = "hbase.client.pause"; 788 789 /** 790 * Default value of {@link #HBASE_CLIENT_PAUSE}. 791 */ 792 public static final long DEFAULT_HBASE_CLIENT_PAUSE = 100; 793 794 /** 795 * Parameter name for client pause value for special case such as call queue too big, etc. 796 */ 797 public static final String HBASE_CLIENT_PAUSE_FOR_CQTBE = "hbase.client.pause.cqtbe"; 798 799 /** 800 * The maximum number of concurrent connections the client will maintain. 801 */ 802 public static final String HBASE_CLIENT_MAX_TOTAL_TASKS = "hbase.client.max.total.tasks"; 803 804 /** 805 * Default value of {@link #HBASE_CLIENT_MAX_TOTAL_TASKS}. 806 */ 807 public static final int DEFAULT_HBASE_CLIENT_MAX_TOTAL_TASKS = 100; 808 809 /** 810 * The maximum number of concurrent connections the client will maintain to a single 811 * RegionServer. 812 */ 813 public static final String HBASE_CLIENT_MAX_PERSERVER_TASKS = "hbase.client.max.perserver.tasks"; 814 815 /** 816 * Default value of {@link #HBASE_CLIENT_MAX_PERSERVER_TASKS}. 817 */ 818 public static final int DEFAULT_HBASE_CLIENT_MAX_PERSERVER_TASKS = 2; 819 820 /** 821 * The maximum number of concurrent connections the client will maintain to a single 822 * Region. 823 */ 824 public static final String HBASE_CLIENT_MAX_PERREGION_TASKS = "hbase.client.max.perregion.tasks"; 825 826 /** 827 * Default value of {@link #HBASE_CLIENT_MAX_PERREGION_TASKS}. 828 */ 829 public static final int DEFAULT_HBASE_CLIENT_MAX_PERREGION_TASKS = 1; 830 831 /** 832 * The maximum number of concurrent pending RPC requests for one server in process level. 833 */ 834 public static final String HBASE_CLIENT_PERSERVER_REQUESTS_THRESHOLD = 835 "hbase.client.perserver.requests.threshold"; 836 837 /** 838 * Default value of {@link #HBASE_CLIENT_PERSERVER_REQUESTS_THRESHOLD}. 839 */ 840 public static final int DEFAULT_HBASE_CLIENT_PERSERVER_REQUESTS_THRESHOLD = Integer.MAX_VALUE; 841 842 843 /** 844 * Parameter name for server pause value, used mostly as value to wait before 845 * running a retry of a failed operation. 846 */ 847 public static final String HBASE_SERVER_PAUSE = "hbase.server.pause"; 848 849 /** 850 * Default value of {@link #HBASE_SERVER_PAUSE}. 851 */ 852 public static final int DEFAULT_HBASE_SERVER_PAUSE = 1000; 853 854 /** 855 * Parameter name for maximum retries, used as maximum for all retryable 856 * operations such as fetching of the root region from root region server, 857 * getting a cell's value, starting a row update, etc. 858 */ 859 public static final String HBASE_CLIENT_RETRIES_NUMBER = "hbase.client.retries.number"; 860 861 /** 862 * Default value of {@link #HBASE_CLIENT_RETRIES_NUMBER}. 863 */ 864 public static final int DEFAULT_HBASE_CLIENT_RETRIES_NUMBER = 15; 865 866 public static final String HBASE_CLIENT_SERVERSIDE_RETRIES_MULTIPLIER = 867 "hbase.client.serverside.retries.multiplier"; 868 869 public static final int DEFAULT_HBASE_CLIENT_SERVERSIDE_RETRIES_MULTIPLIER = 3; 870 871 /** 872 * Parameter name to set the default scanner caching for all clients. 873 */ 874 public static final String HBASE_CLIENT_SCANNER_CACHING = "hbase.client.scanner.caching"; 875 876 /** 877 * Default value for {@link #HBASE_CLIENT_SCANNER_CACHING} 878 */ 879 public static final int DEFAULT_HBASE_CLIENT_SCANNER_CACHING = Integer.MAX_VALUE; 880 881 /** 882 * Parameter name for number of rows that will be fetched when calling next on 883 * a scanner if it is not served from memory. Higher caching values will 884 * enable faster scanners but will eat up more memory and some calls of next 885 * may take longer and longer times when the cache is empty. 886 */ 887 public static final String HBASE_META_SCANNER_CACHING = "hbase.meta.scanner.caching"; 888 889 /** 890 * Default value of {@link #HBASE_META_SCANNER_CACHING}. 891 */ 892 public static final int DEFAULT_HBASE_META_SCANNER_CACHING = 100; 893 894 /** 895 * Parameter name for number of versions, kept by meta table. 896 */ 897 public static final String HBASE_META_VERSIONS = "hbase.meta.versions"; 898 899 /** 900 * Default value of {@link #HBASE_META_VERSIONS}. 901 */ 902 public static final int DEFAULT_HBASE_META_VERSIONS = 3; 903 904 /** 905 * Parameter name for number of versions, kept by meta table. 906 */ 907 public static final String HBASE_META_BLOCK_SIZE = "hbase.meta.blocksize"; 908 909 /** 910 * Default value of {@link #HBASE_META_BLOCK_SIZE}. 911 */ 912 public static final int DEFAULT_HBASE_META_BLOCK_SIZE = 8 * 1024; 913 914 /** 915 * Parameter name for unique identifier for this {@link org.apache.hadoop.conf.Configuration} 916 * instance. If there are two or more {@link org.apache.hadoop.conf.Configuration} instances that, 917 * for all intents and purposes, are the same except for their instance ids, then they will not be 918 * able to share the same org.apache.hadoop.hbase.client.HConnection instance. On the other hand, 919 * even if the instance ids are the same, it could result in non-shared 920 * org.apache.hadoop.hbase.client.HConnection instances if some of the other connection parameters 921 * differ. 922 */ 923 public static final String HBASE_CLIENT_INSTANCE_ID = "hbase.client.instance.id"; 924 925 /** 926 * The client scanner timeout period in milliseconds. 927 */ 928 public static final String HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD = 929 "hbase.client.scanner.timeout.period"; 930 931 /** 932 * Use {@link #HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD} instead. 933 * @deprecated This config option is deprecated. Will be removed at later releases after 0.96. 934 */ 935 @Deprecated 936 public static final String HBASE_REGIONSERVER_LEASE_PERIOD_KEY = 937 "hbase.regionserver.lease.period"; 938 939 /** 940 * Default value of {@link #HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD}. 941 */ 942 public static final int DEFAULT_HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD = 60000; 943 944 /** 945 * timeout for each RPC 946 */ 947 public static final String HBASE_RPC_TIMEOUT_KEY = "hbase.rpc.timeout"; 948 949 /** 950 * timeout for each read RPC 951 */ 952 public static final String HBASE_RPC_READ_TIMEOUT_KEY = "hbase.rpc.read.timeout"; 953 954 /** 955 * timeout for each write RPC 956 */ 957 public static final String HBASE_RPC_WRITE_TIMEOUT_KEY = "hbase.rpc.write.timeout"; 958 959 /** 960 * Default value of {@link #HBASE_RPC_TIMEOUT_KEY} 961 */ 962 public static final int DEFAULT_HBASE_RPC_TIMEOUT = 60000; 963 964 /** 965 * timeout for short operation RPC 966 */ 967 public static final String HBASE_RPC_SHORTOPERATION_TIMEOUT_KEY = 968 "hbase.rpc.shortoperation.timeout"; 969 970 /** 971 * Default value of {@link #HBASE_RPC_SHORTOPERATION_TIMEOUT_KEY} 972 */ 973 public static final int DEFAULT_HBASE_RPC_SHORTOPERATION_TIMEOUT = 10000; 974 975 /** 976 * Value indicating the server name was saved with no sequence number. 977 */ 978 public static final long NO_SEQNUM = -1; 979 980 /** 981 * Registry implementation to be used on the client side. 982 */ 983 public static final String CLIENT_CONNECTION_REGISTRY_IMPL_CONF_KEY = 984 "hbase.client.registry.impl"; 985 986 /* 987 * cluster replication constants. 988 */ 989 public static final String 990 REPLICATION_SOURCE_SERVICE_CLASSNAME = "hbase.replication.source.service"; 991 public static final String 992 REPLICATION_SINK_SERVICE_CLASSNAME = "hbase.replication.sink.service"; 993 public static final String REPLICATION_SERVICE_CLASSNAME_DEFAULT = 994 "org.apache.hadoop.hbase.replication.regionserver.Replication"; 995 public static final String REPLICATION_BULKLOAD_ENABLE_KEY = "hbase.replication.bulkload.enabled"; 996 public static final boolean REPLICATION_BULKLOAD_ENABLE_DEFAULT = false; 997 /** Replication cluster id of source cluster which uniquely identifies itself with peer cluster */ 998 public static final String REPLICATION_CLUSTER_ID = "hbase.replication.cluster.id"; 999 /** 1000 * Max total size of buffered entries in all replication peers. It will prevent server getting 1001 * OOM if there are many peers. Default value is 256MB which is four times to default 1002 * replication.source.size.capacity. 1003 */ 1004 public static final String REPLICATION_SOURCE_TOTAL_BUFFER_KEY = "replication.total.buffer.quota"; 1005 1006 public static final int REPLICATION_SOURCE_TOTAL_BUFFER_DFAULT = 256 * 1024 * 1024; 1007 1008 /** Configuration key for ReplicationSource shipeEdits timeout */ 1009 public static final String REPLICATION_SOURCE_SHIPEDITS_TIMEOUT = 1010 "replication.source.shipedits.timeout"; 1011 public static final int REPLICATION_SOURCE_SHIPEDITS_TIMEOUT_DFAULT = 60000; 1012 1013 /** 1014 * Directory where the source cluster file system client configuration are placed which is used by 1015 * sink cluster to copy HFiles from source cluster file system 1016 */ 1017 public static final String REPLICATION_CONF_DIR = "hbase.replication.conf.dir"; 1018 1019 /** Maximum time to retry for a failed bulk load request */ 1020 public static final String BULKLOAD_MAX_RETRIES_NUMBER = "hbase.bulkload.retries.number"; 1021 1022 /** HBCK special code name used as server name when manipulating ZK nodes */ 1023 @Deprecated // unused. see HBASE-3789. remove this in 3.0 1024 public static final String HBCK_CODE_NAME = "HBCKServerName"; 1025 1026 public static final String KEY_FOR_HOSTNAME_SEEN_BY_MASTER = 1027 "hbase.regionserver.hostname.seen.by.master"; 1028 1029 public static final String HBASE_MASTER_LOGCLEANER_PLUGINS = 1030 "hbase.master.logcleaner.plugins"; 1031 1032 public static final String HBASE_REGION_SPLIT_POLICY_KEY = 1033 "hbase.regionserver.region.split.policy"; 1034 1035 /** Whether nonces are enabled; default is true. */ 1036 public static final String HBASE_RS_NONCES_ENABLED = "hbase.regionserver.nonces.enabled"; 1037 1038 /** 1039 * Configuration key for the size of the block cache 1040 */ 1041 public static final String HFILE_BLOCK_CACHE_SIZE_KEY = 1042 "hfile.block.cache.size"; 1043 1044 public static final float HFILE_BLOCK_CACHE_SIZE_DEFAULT = 0.4f; 1045 1046 /* 1047 * Minimum percentage of free heap necessary for a successful cluster startup. 1048 */ 1049 public static final float HBASE_CLUSTER_MINIMUM_MEMORY_THRESHOLD = 0.2f; 1050 1051 /** 1052 * @deprecated It is used internally. As of release 2.0.0, this will be removed in HBase 3.0.0. 1053 */ 1054 @Deprecated 1055 public static final Pattern CP_HTD_ATTR_KEY_PATTERN = 1056 Pattern.compile("^coprocessor\\$([0-9]+)$", Pattern.CASE_INSENSITIVE); 1057 1058 /** 1059 * <pre> 1060 * Pattern that matches a coprocessor specification. Form is: 1061 * {@code <coprocessor jar file location> '|' <class name> ['|' <priority> ['|' <arguments>]]} 1062 * where arguments are {@code <KEY> '=' <VALUE> [,...]} 1063 * For example: {@code hdfs:///foo.jar|com.foo.FooRegionObserver|1001|arg1=1,arg2=2} 1064 * </pre> 1065 * @deprecated It is used internally. As of release 2.0.0, this will be removed in HBase 3.0.0. 1066 */ 1067 @Deprecated 1068 public static final Pattern CP_HTD_ATTR_VALUE_PATTERN = 1069 Pattern.compile("(^[^\\|]*)\\|([^\\|]+)\\|[\\s]*([\\d]*)[\\s]*(\\|.*)?$"); 1070 /** 1071 * @deprecated It is used internally. As of release 2.0.0, this will be removed in HBase 3.0.0. 1072 */ 1073 @Deprecated 1074 public static final String CP_HTD_ATTR_VALUE_PARAM_KEY_PATTERN = "[^=,]+"; 1075 /** 1076 * @deprecated It is used internally. As of release 2.0.0, this will be removed in HBase 3.0.0. 1077 */ 1078 @Deprecated 1079 public static final String CP_HTD_ATTR_VALUE_PARAM_VALUE_PATTERN = "[^,]+"; 1080 /** 1081 * @deprecated It is used internally. As of release 2.0.0, this will be removed in HBase 3.0.0. 1082 */ 1083 @Deprecated 1084 public static final Pattern CP_HTD_ATTR_VALUE_PARAM_PATTERN = Pattern.compile( 1085 "(" + CP_HTD_ATTR_VALUE_PARAM_KEY_PATTERN + ")=(" + 1086 CP_HTD_ATTR_VALUE_PARAM_VALUE_PATTERN + "),?"); 1087 public static final String CP_HTD_ATTR_INCLUSION_KEY = 1088 "hbase.coprocessor.classloader.included.classes"; 1089 1090 /** The delay when re-trying a socket operation in a loop (HBASE-4712) */ 1091 public static final int SOCKET_RETRY_WAIT_MS = 200; 1092 1093 /** Host name of the local machine */ 1094 public static final String LOCALHOST = "localhost"; 1095 1096 /** 1097 * If this parameter is set to true, then hbase will read 1098 * data and then verify checksums. Checksum verification 1099 * inside hdfs will be switched off. However, if the hbase-checksum 1100 * verification fails, then it will switch back to using 1101 * hdfs checksums for verifiying data that is being read from storage. 1102 * 1103 * If this parameter is set to false, then hbase will not 1104 * verify any checksums, instead it will depend on checksum verification 1105 * being done in the hdfs client. 1106 */ 1107 public static final String HBASE_CHECKSUM_VERIFICATION = 1108 "hbase.regionserver.checksum.verify"; 1109 1110 public static final String LOCALHOST_IP = "127.0.0.1"; 1111 1112 public static final String REGION_SERVER_HANDLER_COUNT = "hbase.regionserver.handler.count"; 1113 public static final int DEFAULT_REGION_SERVER_HANDLER_COUNT = 30; 1114 1115 /* 1116 * REGION_SERVER_HANDLER_ABORT_ON_ERROR_PERCENT: 1117 * -1 => Disable aborting 1118 * 0 => Abort if even a single handler has died 1119 * 0.x => Abort only when this percent of handlers have died 1120 * 1 => Abort only all of the handers have died 1121 */ 1122 public static final String REGION_SERVER_HANDLER_ABORT_ON_ERROR_PERCENT = 1123 "hbase.regionserver.handler.abort.on.error.percent"; 1124 public static final double DEFAULT_REGION_SERVER_HANDLER_ABORT_ON_ERROR_PERCENT = 0.5; 1125 1126 //High priority handlers to deal with admin requests and system table operation requests 1127 public static final String REGION_SERVER_HIGH_PRIORITY_HANDLER_COUNT = 1128 "hbase.regionserver.metahandler.count"; 1129 public static final int DEFAULT_REGION_SERVER_HIGH_PRIORITY_HANDLER_COUNT = 20; 1130 1131 public static final String REGION_SERVER_REPLICATION_HANDLER_COUNT = 1132 "hbase.regionserver.replication.handler.count"; 1133 public static final int DEFAULT_REGION_SERVER_REPLICATION_HANDLER_COUNT = 3; 1134 // Meta Transition handlers to deal with meta ReportRegionStateTransitionRequest. Meta transition 1135 // should be dealt with in a separate handler in case blocking other region's transition. 1136 public static final String MASTER_META_TRANSITION_HANDLER_COUNT = 1137 "hbase.master.meta.transition.handler.count"; 1138 public static final int MASTER__META_TRANSITION_HANDLER_COUNT_DEFAULT = 1; 1139 1140 @Deprecated // unused. see HBASE-10569. remove this in 3.0 1141 public static final String MASTER_HANDLER_COUNT = "hbase.master.handler.count"; 1142 @Deprecated // unused. see HBASE-10569. remove this in 3.0 1143 public static final int DEFAULT_MASTER_HANLDER_COUNT = 25; 1144 1145 /** Conf key that specifies timeout value to wait for a region ready */ 1146 @Deprecated // unused. see HBASE-13616. remove this in 3.0 1147 public static final String LOG_REPLAY_WAIT_REGION_TIMEOUT = 1148 "hbase.master.log.replay.wait.region.timeout"; 1149 1150 /** Conf key for enabling meta replication */ 1151 public static final String USE_META_REPLICAS = "hbase.meta.replicas.use"; 1152 public static final boolean DEFAULT_USE_META_REPLICAS = false; 1153 public static final String META_REPLICAS_NUM = "hbase.meta.replica.count"; 1154 public static final int DEFAULT_META_REPLICA_NUM = 1; 1155 1156 /** 1157 * The name of the configuration parameter that specifies 1158 * the number of bytes in a newly created checksum chunk. 1159 */ 1160 public static final String BYTES_PER_CHECKSUM = 1161 "hbase.hstore.bytes.per.checksum"; 1162 1163 /** 1164 * The name of the configuration parameter that specifies 1165 * the name of an algorithm that is used to compute checksums 1166 * for newly created blocks. 1167 */ 1168 public static final String CHECKSUM_TYPE_NAME = 1169 "hbase.hstore.checksum.algorithm"; 1170 1171 /** Enable file permission modification from standard hbase */ 1172 public static final String ENABLE_DATA_FILE_UMASK = "hbase.data.umask.enable"; 1173 /** File permission umask to use when creating hbase data files */ 1174 public static final String DATA_FILE_UMASK_KEY = "hbase.data.umask"; 1175 1176 /** Configuration name of WAL Compression */ 1177 public static final String ENABLE_WAL_COMPRESSION = 1178 "hbase.regionserver.wal.enablecompression"; 1179 1180 /** Configuration name of WAL storage policy 1181 * Valid values are: HOT, COLD, WARM, ALL_SSD, ONE_SSD, LAZY_PERSIST 1182 * See http://hadoop.apache.org/docs/r2.7.3/hadoop-project-dist/hadoop-hdfs/ArchivalStorage.html*/ 1183 public static final String WAL_STORAGE_POLICY = "hbase.wal.storage.policy"; 1184 /** 1185 * "NONE" is not a valid storage policy and means we defer the policy to HDFS. @see 1186 * <a href="https://issues.apache.org/jira/browse/HBASE-20691">HBASE-20691</a> 1187 */ 1188 public static final String DEFER_TO_HDFS_STORAGE_POLICY = "NONE"; 1189 /** By default we defer the WAL storage policy to HDFS */ 1190 public static final String DEFAULT_WAL_STORAGE_POLICY = DEFER_TO_HDFS_STORAGE_POLICY; 1191 1192 /** Region in Transition metrics threshold time */ 1193 public static final String METRICS_RIT_STUCK_WARNING_THRESHOLD = 1194 "hbase.metrics.rit.stuck.warning.threshold"; 1195 1196 public static final String LOAD_BALANCER_SLOP_KEY = "hbase.regions.slop"; 1197 1198 /** delimiter used between portions of a region name */ 1199 public static final int DELIMITER = ','; 1200 1201 /** 1202 * QOS attributes: these attributes are used to demarcate RPC call processing 1203 * by different set of handlers. For example, HIGH_QOS tagged methods are 1204 * handled by high priority handlers. 1205 */ 1206 // normal_QOS < replication_QOS < replay_QOS < QOS_threshold < admin_QOS < high_QOS < meta_QOS 1207 public static final int PRIORITY_UNSET = -1; 1208 public static final int NORMAL_QOS = 0; 1209 public static final int REPLICATION_QOS = 5; 1210 public static final int REPLAY_QOS = 6; 1211 public static final int QOS_THRESHOLD = 10; 1212 public static final int ADMIN_QOS = 100; 1213 public static final int HIGH_QOS = 200; 1214 public static final int SYSTEMTABLE_QOS = HIGH_QOS; 1215 /** 1216 * @deprecated the name "META_QOS" is a bit ambiguous, actually only meta region transition can 1217 * use this priority, and you should not use this directly. Will be removed in 3.0.0. 1218 */ 1219 @Deprecated 1220 public static final int META_QOS = 300; 1221 1222 /** Directory under /hbase where archived hfiles are stored */ 1223 public static final String HFILE_ARCHIVE_DIRECTORY = "archive"; 1224 1225 /** 1226 * Name of the directory to store all snapshots. See SnapshotDescriptionUtils for 1227 * remaining snapshot constants; this is here to keep HConstants dependencies at a minimum and 1228 * uni-directional. 1229 */ 1230 public static final String SNAPSHOT_DIR_NAME = ".hbase-snapshot"; 1231 1232 /* Name of old snapshot directory. See HBASE-8352 for details on why it needs to be renamed */ 1233 public static final String OLD_SNAPSHOT_DIR_NAME = ".snapshot"; 1234 1235 /** Temporary directory used for table creation and deletion */ 1236 public static final String HBASE_TEMP_DIRECTORY = ".tmp"; 1237 /** 1238 * The period (in milliseconds) between computing region server point in time metrics 1239 */ 1240 public static final String REGIONSERVER_METRICS_PERIOD = "hbase.regionserver.metrics.period"; 1241 public static final long DEFAULT_REGIONSERVER_METRICS_PERIOD = 5000; 1242 /** Directories that are not HBase table directories */ 1243 public static final List<String> HBASE_NON_TABLE_DIRS = 1244 Collections.unmodifiableList(Arrays.asList(new String[] { 1245 HBCK_SIDELINEDIR_NAME, HBASE_TEMP_DIRECTORY, MIGRATION_NAME 1246 })); 1247 1248 /** 1249 * Directories that are not HBase user table directories. 1250 * @deprecated Since hbase-2.3.0; no replacement as not used any more (internally at least) 1251 */ 1252 @Deprecated 1253 public static final List<String> HBASE_NON_USER_TABLE_DIRS = 1254 Collections.unmodifiableList(Arrays.asList((String[])ArrayUtils.addAll( 1255 new String[] { TableName.META_TABLE_NAME.getNameAsString() }, 1256 HBASE_NON_TABLE_DIRS.toArray()))); 1257 1258 /** Health script related settings. */ 1259 public static final String HEALTH_SCRIPT_LOC = "hbase.node.health.script.location"; 1260 public static final String HEALTH_SCRIPT_TIMEOUT = "hbase.node.health.script.timeout"; 1261 public static final String HEALTH_CHORE_WAKE_FREQ = 1262 "hbase.node.health.script.frequency"; 1263 public static final long DEFAULT_HEALTH_SCRIPT_TIMEOUT = 60000; 1264 /** 1265 * The maximum number of health check failures a server can encounter consecutively. 1266 */ 1267 public static final String HEALTH_FAILURE_THRESHOLD = 1268 "hbase.node.health.failure.threshold"; 1269 public static final int DEFAULT_HEALTH_FAILURE_THRESHOLD = 3; 1270 1271 1272 /** 1273 * Setting to activate, or not, the publication of the status by the master. Default 1274 * notification is by a multicast message. 1275 */ 1276 public static final String STATUS_PUBLISHED = "hbase.status.published"; 1277 public static final boolean STATUS_PUBLISHED_DEFAULT = false; 1278 1279 /** 1280 * IP to use for the multicast status messages between the master and the clients. 1281 * The default address is chosen as one among others within the ones suitable for multicast 1282 * messages. 1283 */ 1284 public static final String STATUS_MULTICAST_ADDRESS = "hbase.status.multicast.address.ip"; 1285 public static final String DEFAULT_STATUS_MULTICAST_ADDRESS = "226.1.1.3"; 1286 1287 /** 1288 * The address to use for binding the local socket for receiving multicast. Defaults to 1289 * 0.0.0.0. 1290 * @see <a href="https://issues.apache.org/jira/browse/HBASE-9961">HBASE-9961</a> 1291 */ 1292 public static final String STATUS_MULTICAST_BIND_ADDRESS = 1293 "hbase.status.multicast.bind.address.ip"; 1294 public static final String DEFAULT_STATUS_MULTICAST_BIND_ADDRESS = "0.0.0.0"; 1295 1296 /** 1297 * The port to use for the multicast messages. 1298 */ 1299 public static final String STATUS_MULTICAST_PORT = "hbase.status.multicast.address.port"; 1300 public static final int DEFAULT_STATUS_MULTICAST_PORT = 16100; 1301 1302 /** 1303 * The network interface name to use for the multicast messages. 1304 */ 1305 public static final String STATUS_MULTICAST_NI_NAME = "hbase.status.multicast.ni.name"; 1306 1307 /** 1308 * The address to use for binding the local socket for sending multicast. Defaults to 0.0.0.0. 1309 */ 1310 public static final String STATUS_MULTICAST_PUBLISHER_BIND_ADDRESS = 1311 "hbase.status.multicast.publisher.bind.address.ip"; 1312 public static final String DEFAULT_STATUS_MULTICAST_PUBLISHER_BIND_ADDRESS = "0.0.0.0"; 1313 1314 public static final long NO_NONCE = 0; 1315 1316 /** Default cipher for encryption */ 1317 public static final String CIPHER_AES = "AES"; 1318 1319 /** Configuration key for the crypto algorithm provider, a class name */ 1320 public static final String CRYPTO_CIPHERPROVIDER_CONF_KEY = "hbase.crypto.cipherprovider"; 1321 1322 /** Configuration key for the crypto key provider, a class name */ 1323 public static final String CRYPTO_KEYPROVIDER_CONF_KEY = "hbase.crypto.keyprovider"; 1324 1325 /** Configuration key for the crypto key provider parameters */ 1326 public static final String CRYPTO_KEYPROVIDER_PARAMETERS_KEY = 1327 "hbase.crypto.keyprovider.parameters"; 1328 1329 /** Configuration key for the name of the master key for the cluster, a string */ 1330 public static final String CRYPTO_MASTERKEY_NAME_CONF_KEY = "hbase.crypto.master.key.name"; 1331 1332 /** Configuration key for the name of the alternate master key for the cluster, a string */ 1333 public static final String CRYPTO_MASTERKEY_ALTERNATE_NAME_CONF_KEY = 1334 "hbase.crypto.master.alternate.key.name"; 1335 1336 /** Configuration key for the algorithm to use when encrypting the WAL, a string */ 1337 public static final String CRYPTO_WAL_ALGORITHM_CONF_KEY = "hbase.crypto.wal.algorithm"; 1338 1339 /** Configuration key for the name of the master WAL encryption key for the cluster, a string */ 1340 public static final String CRYPTO_WAL_KEY_NAME_CONF_KEY = "hbase.crypto.wal.key.name"; 1341 1342 /** Configuration key for the algorithm used for creating jks key, a string */ 1343 public static final String CRYPTO_KEY_ALGORITHM_CONF_KEY = "hbase.crypto.key.algorithm"; 1344 1345 /** Configuration key for the name of the alternate cipher algorithm for the cluster, a string */ 1346 public static final String CRYPTO_ALTERNATE_KEY_ALGORITHM_CONF_KEY = 1347 "hbase.crypto.alternate.key.algorithm"; 1348 1349 /** Configuration key for enabling WAL encryption, a boolean */ 1350 public static final String ENABLE_WAL_ENCRYPTION = "hbase.regionserver.wal.encryption"; 1351 1352 /** Configuration key for setting RPC codec class name */ 1353 public static final String RPC_CODEC_CONF_KEY = "hbase.client.rpc.codec"; 1354 1355 /** Configuration key for setting replication codec class name */ 1356 public static final String REPLICATION_CODEC_CONF_KEY = "hbase.replication.rpc.codec"; 1357 1358 /** Maximum number of threads used by the replication source for shipping edits to the sinks */ 1359 public static final String REPLICATION_SOURCE_MAXTHREADS_KEY = 1360 "hbase.replication.source.maxthreads"; 1361 1362 /** 1363 * Drop edits for tables that been deleted from the replication source and target 1364 * @deprecated moved it into HBaseInterClusterReplicationEndpoint 1365 */ 1366 @Deprecated 1367 public static final String REPLICATION_DROP_ON_DELETED_TABLE_KEY = 1368 "hbase.replication.drop.on.deleted.table"; 1369 1370 /** Maximum number of threads used by the replication source for shipping edits to the sinks */ 1371 public static final int REPLICATION_SOURCE_MAXTHREADS_DEFAULT = 10; 1372 1373 /** Configuration key for SplitLog manager timeout */ 1374 public static final String HBASE_SPLITLOG_MANAGER_TIMEOUT = "hbase.splitlog.manager.timeout"; 1375 1376 /** 1377 * Configuration keys for Bucket cache 1378 */ 1379 // TODO moving these bucket cache implementation specific configs to this level is violation of 1380 // encapsulation. But as these has to be referred from hbase-common and bucket cache 1381 // sits in hbase-server, there were no other go! Can we move the cache implementation to 1382 // hbase-common? 1383 1384 /** 1385 * Current ioengine options in include: heap, offheap and file:PATH (where PATH is the path 1386 * to the file that will host the file-based cache. See BucketCache#getIOEngineFromName() for 1387 * list of supported ioengine options. 1388 * <p>Set this option and a non-zero {@link #BUCKET_CACHE_SIZE_KEY} to enable bucket cache. 1389 */ 1390 public static final String BUCKET_CACHE_IOENGINE_KEY = "hbase.bucketcache.ioengine"; 1391 1392 /** 1393 * When using bucket cache, this is a float that EITHER represents a percentage of total heap 1394 * memory size to give to the cache (if < 1.0) OR, it is the capacity in 1395 * megabytes of the cache. 1396 */ 1397 public static final String BUCKET_CACHE_SIZE_KEY = "hbase.bucketcache.size"; 1398 1399 /** 1400 * HConstants for fast fail on the client side follow 1401 */ 1402 /** 1403 * Config for enabling/disabling the fast fail mode. 1404 * @deprecated since 2.3.0, and in 3.0.0 the actually implementation will be removed so config 1405 * this value will have no effect. The constants itself will be removed in 4.0.0. 1406 */ 1407 @Deprecated 1408 public static final String HBASE_CLIENT_FAST_FAIL_MODE_ENABLED = 1409 "hbase.client.fast.fail.mode.enabled"; 1410 1411 /** 1412 * @deprecated since 2.3.0, and in 3.0.0 the actually implementation will be removed so config 1413 * this value will have no effect. The constants itself will be removed in 4.0.0. 1414 */ 1415 @Deprecated 1416 public static final boolean HBASE_CLIENT_ENABLE_FAST_FAIL_MODE_DEFAULT = false; 1417 1418 /** 1419 * @deprecated since 2.3.0, and in 3.0.0 the actually implementation will be removed so config 1420 * this value will have no effect. The constants itself will be removed in 4.0.0. 1421 */ 1422 @Deprecated 1423 public static final String HBASE_CLIENT_FAST_FAIL_THREASHOLD_MS = 1424 "hbase.client.fastfail.threshold"; 1425 1426 /** 1427 * @deprecated since 2.3.0, and in 3.0.0 the actually implementation will be removed so config 1428 * this value will have no effect. The constants itself will be removed in 4.0.0. 1429 */ 1430 @Deprecated 1431 public static final long HBASE_CLIENT_FAST_FAIL_THREASHOLD_MS_DEFAULT = 60000; 1432 1433 /** 1434 * @deprecated since 2.3.0, and in 3.0.0 the actually implementation will be removed so config 1435 * this value will have no effect. The constants itself will be removed in 4.0.0. 1436 */ 1437 @Deprecated 1438 public static final String HBASE_CLIENT_FAILURE_MAP_CLEANUP_INTERVAL_MS = 1439 "hbase.client.failure.map.cleanup.interval"; 1440 1441 /** 1442 * @deprecated since 2.3.0, and in 3.0.0 the actually implementation will be removed so config 1443 * this value will have no effect. The constants itself will be removed in 4.0.0. 1444 */ 1445 @Deprecated 1446 public static final long HBASE_CLIENT_FAILURE_MAP_CLEANUP_INTERVAL_MS_DEFAULT = 600000; 1447 1448 /** 1449 * @deprecated since 2.3.0, and in 3.0.0 the actually implementation will be removed so config 1450 * this value will have no effect. The constants itself will be removed in 4.0.0. 1451 */ 1452 @Deprecated 1453 public static final String HBASE_CLIENT_FAST_FAIL_CLEANUP_MS_DURATION_MS = 1454 "hbase.client.fast.fail.cleanup.duration"; 1455 1456 /** 1457 * @deprecated since 2.3.0, and in 3.0.0 the actually implementation will be removed so config 1458 * this value will have no effect. The constants itself will be removed in 4.0.0. 1459 */ 1460 @Deprecated 1461 public static final long HBASE_CLIENT_FAST_FAIL_CLEANUP_DURATION_MS_DEFAULT = 600000; 1462 1463 /** 1464 * @deprecated since 2.3.0, and in 3.0.0 the actually implementation will be removed so config 1465 * this value will have no effect. The constants itself will be removed in 4.0.0. 1466 */ 1467 @Deprecated 1468 public static final String HBASE_CLIENT_FAST_FAIL_INTERCEPTOR_IMPL = 1469 "hbase.client.fast.fail.interceptor.impl"; 1470 1471 public static final String HBASE_SPLIT_WAL_COORDINATED_BY_ZK = "hbase.split.wal.zk.coordinated"; 1472 1473 public static final boolean DEFAULT_HBASE_SPLIT_COORDINATED_BY_ZK = true; 1474 1475 public static final String HBASE_SPLIT_WAL_MAX_SPLITTER = "hbase.regionserver.wal.max.splitters"; 1476 1477 public static final int DEFAULT_HBASE_SPLIT_WAL_MAX_SPLITTER = 2; 1478 1479 /** Config key for if the server should send backpressure and if the client should listen to 1480 * that backpressure from the server */ 1481 public static final String ENABLE_CLIENT_BACKPRESSURE = "hbase.client.backpressure.enabled"; 1482 public static final boolean DEFAULT_ENABLE_CLIENT_BACKPRESSURE = false; 1483 1484 public static final String HEAP_OCCUPANCY_LOW_WATERMARK_KEY = 1485 "hbase.heap.occupancy.low_water_mark"; 1486 public static final float DEFAULT_HEAP_OCCUPANCY_LOW_WATERMARK = 0.95f; 1487 public static final String HEAP_OCCUPANCY_HIGH_WATERMARK_KEY = 1488 "hbase.heap.occupancy.high_water_mark"; 1489 public static final float DEFAULT_HEAP_OCCUPANCY_HIGH_WATERMARK = 0.98f; 1490 1491 /** 1492 * The max number of threads used for splitting storefiles in parallel during 1493 * the region split process. 1494 */ 1495 public static final String REGION_SPLIT_THREADS_MAX = 1496 "hbase.regionserver.region.split.threads.max"; 1497 1498 /** Canary config keys */ 1499 // TODO: Move these defines to Canary Class 1500 public static final String HBASE_CANARY_WRITE_DATA_TTL_KEY = "hbase.canary.write.data.ttl"; 1501 1502 public static final String HBASE_CANARY_WRITE_PERSERVER_REGIONS_LOWERLIMIT_KEY = 1503 "hbase.canary.write.perserver.regions.lowerLimit"; 1504 1505 public static final String HBASE_CANARY_WRITE_PERSERVER_REGIONS_UPPERLIMIT_KEY = 1506 "hbase.canary.write.perserver.regions.upperLimit"; 1507 1508 public static final String HBASE_CANARY_WRITE_VALUE_SIZE_KEY = "hbase.canary.write.value.size"; 1509 1510 public static final String HBASE_CANARY_WRITE_TABLE_CHECK_PERIOD_KEY = 1511 "hbase.canary.write.table.check.period"; 1512 1513 public static final String HBASE_CANARY_READ_RAW_SCAN_KEY = "hbase.canary.read.raw.enabled"; 1514 1515 public static final String HBASE_CANARY_READ_ALL_CF = "hbase.canary.read.all.column.famliy"; 1516 /** 1517 * Configuration keys for programmatic JAAS configuration for secured ZK interaction 1518 */ 1519 public static final String ZK_CLIENT_KEYTAB_FILE = "hbase.zookeeper.client.keytab.file"; 1520 public static final String ZK_CLIENT_KERBEROS_PRINCIPAL = 1521 "hbase.zookeeper.client.kerberos.principal"; 1522 public static final String ZK_SERVER_KEYTAB_FILE = "hbase.zookeeper.server.keytab.file"; 1523 public static final String ZK_SERVER_KERBEROS_PRINCIPAL = 1524 "hbase.zookeeper.server.kerberos.principal"; 1525 1526 /** Config key for hbase temporary directory in hdfs */ 1527 public static final String TEMPORARY_FS_DIRECTORY_KEY = "hbase.fs.tmp.dir"; 1528 public static final String DEFAULT_TEMPORARY_HDFS_DIRECTORY = "/user/" 1529 + System.getProperty("user.name") + "/hbase-staging"; 1530 1531 public static final String SNAPSHOT_RESTORE_TAKE_FAILSAFE_SNAPSHOT = 1532 "hbase.snapshot.restore.take.failsafe.snapshot"; 1533 public static final boolean DEFAULT_SNAPSHOT_RESTORE_TAKE_FAILSAFE_SNAPSHOT = true; 1534 1535 public static final String SNAPSHOT_RESTORE_FAILSAFE_NAME = 1536 "hbase.snapshot.restore.failsafe.name"; 1537 public static final String DEFAULT_SNAPSHOT_RESTORE_FAILSAFE_NAME = 1538 "hbase-failsafe-{snapshot.name}-{restore.timestamp}"; 1539 1540 public static final String DEFAULT_LOSSY_COUNTING_ERROR_RATE = 1541 "hbase.util.default.lossycounting.errorrate"; 1542 public static final String NOT_IMPLEMENTED = "Not implemented"; 1543 1544 // Default TTL - FOREVER 1545 public static final long DEFAULT_SNAPSHOT_TTL = 0; 1546 1547 // User defined Default TTL config key 1548 public static final String DEFAULT_SNAPSHOT_TTL_CONFIG_KEY = "hbase.master.snapshot.ttl"; 1549 1550 // Regions Recovery based on high storeFileRefCount threshold value 1551 public static final String STORE_FILE_REF_COUNT_THRESHOLD = 1552 "hbase.regions.recovery.store.file.ref.count"; 1553 1554 // default -1 indicates there is no threshold on high storeRefCount 1555 public static final int DEFAULT_STORE_FILE_REF_COUNT_THRESHOLD = -1; 1556 1557 public static final String REGIONS_RECOVERY_INTERVAL = 1558 "hbase.master.regions.recovery.check.interval"; 1559 1560 public static final int DEFAULT_REGIONS_RECOVERY_INTERVAL = 1200 * 1000; // Default 20 min 1561 1562 /** 1563 * Configurations for master executor services. 1564 */ 1565 public static final String MASTER_OPEN_REGION_THREADS = 1566 "hbase.master.executor.openregion.threads"; 1567 public static final int MASTER_OPEN_REGION_THREADS_DEFAULT = 5; 1568 1569 public static final String MASTER_CLOSE_REGION_THREADS = 1570 "hbase.master.executor.closeregion.threads"; 1571 public static final int MASTER_CLOSE_REGION_THREADS_DEFAULT = 5; 1572 1573 public static final String MASTER_SERVER_OPERATIONS_THREADS = 1574 "hbase.master.executor.serverops.threads"; 1575 public static final int MASTER_SERVER_OPERATIONS_THREADS_DEFAULT = 5; 1576 1577 public static final String MASTER_META_SERVER_OPERATIONS_THREADS = 1578 "hbase.master.executor.meta.serverops.threads"; 1579 public static final int MASTER_META_SERVER_OPERATIONS_THREADS_DEFAULT = 5; 1580 1581 public static final String MASTER_LOG_REPLAY_OPS_THREADS = 1582 "hbase.master.executor.logreplayops.threads"; 1583 public static final int MASTER_LOG_REPLAY_OPS_THREADS_DEFAULT = 10; 1584 1585 public static final int DEFAULT_SLOW_LOG_RING_BUFFER_SIZE = 256; 1586 1587 public static final String SLOW_LOG_BUFFER_ENABLED_KEY = 1588 "hbase.regionserver.slowlog.buffer.enabled"; 1589 public static final boolean DEFAULT_ONLINE_LOG_PROVIDER_ENABLED = false; 1590 1591 /** The slowlog info family as a string*/ 1592 private static final String SLOWLOG_INFO_FAMILY_STR = "info"; 1593 1594 /** The slowlog info family */ 1595 public static final byte [] SLOWLOG_INFO_FAMILY = Bytes.toBytes(SLOWLOG_INFO_FAMILY_STR); 1596 1597 public static final String SLOW_LOG_SYS_TABLE_ENABLED_KEY = 1598 "hbase.regionserver.slowlog.systable.enabled"; 1599 public static final boolean DEFAULT_SLOW_LOG_SYS_TABLE_ENABLED_KEY = false; 1600 1601 private HConstants() { 1602 // Can't be instantiated with this ctor. 1603 } 1604}