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Common functionality for HBase
/*
* 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.hbase;
import static org.apache.hadoop.hbase.io.hfile.BlockType.MAGIC_LENGTH;
import java.nio.ByteBuffer;
import java.nio.charset.Charset;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.UUID;
import org.apache.commons.lang3.ArrayUtils;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.yetus.audience.InterfaceAudience;
/**
* HConstants holds a bunch of HBase-related constants
*/
@InterfaceAudience.Public
public final class HConstants {
// NOTICE!!!! Please do not add a constants here, unless they are referenced by a lot of classes.
// Bytes.UTF8_ENCODING should be updated if this changed
/** When we encode strings, we always specify UTF8 encoding */
public static final String UTF8_ENCODING = "UTF-8";
// Bytes.UTF8_CHARSET should be updated if this changed
/** When we encode strings, we always specify UTF8 encoding */
public static final Charset UTF8_CHARSET = Charset.forName(UTF8_ENCODING);
/**
* Default block size for an HFile.
*/
public final static int DEFAULT_BLOCKSIZE = 64 * 1024;
/** Used as a magic return value while optimized index key feature enabled(HBASE-7845) */
public final static int INDEX_KEY_MAGIC = -2;
/*
* Name of directory that holds recovered edits written by the wal log splitting code, one per
* region
*/
public static final String RECOVERED_EDITS_DIR = "recovered.edits";
/*
* Name of directory that holds recovered hfiles written by the wal log splitting code, one per
* region
*/
public static final String RECOVERED_HFILES_DIR = "recovered.hfiles";
/**
* Date Tiered Compaction tmp dir prefix name if use storage policy
*/
public static final String STORAGE_POLICY_PREFIX = "storage_policy_";
/**
* The first four bytes of Hadoop RPC connections
*/
public static final byte[] RPC_HEADER = new byte[] { 'H', 'B', 'a', 's' };
public static final byte RPC_CURRENT_VERSION = 0;
// HFileBlock constants. TODO!!!! THESE DEFINES BELONG IN HFILEBLOCK, NOT UP HERE.
// Needed down in hbase-common though by encoders but these encoders should not be dealing
// in the internals of hfileblocks. Fix encapsulation.
/** The size data structures with minor version is 0 */
public static final int HFILEBLOCK_HEADER_SIZE_NO_CHECKSUM =
MAGIC_LENGTH + 2 * Bytes.SIZEOF_INT + Bytes.SIZEOF_LONG;
/**
* The size of a version 2 HFile block header, minor version 1. There is a 1 byte checksum type,
* followed by a 4 byte bytesPerChecksum followed by another 4 byte value to store
* sizeofDataOnDisk.
*/
public static final int HFILEBLOCK_HEADER_SIZE =
HFILEBLOCK_HEADER_SIZE_NO_CHECKSUM + Bytes.SIZEOF_BYTE + 2 * Bytes.SIZEOF_INT;
/** Just an array of bytes of the right size. */
public static final byte[] HFILEBLOCK_DUMMY_HEADER = new byte[HFILEBLOCK_HEADER_SIZE];
// End HFileBlockConstants.
/**
* Status codes used for return values of bulk operations.
*/
@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.COPROC)
public enum OperationStatusCode {
NOT_RUN,
SUCCESS,
BAD_FAMILY,
STORE_TOO_BUSY,
SANITY_CHECK_FAILURE,
FAILURE
}
/** long constant for zero */
public static final Long ZERO_L = Long.valueOf(0L);
public static final String NINES = "99999999999999";
public static final String ZEROES = "00000000000000";
// For migration
/** name of version file */
public static final String VERSION_FILE_NAME = "hbase.version";
/**
* Current version of file system. Version 4 supports only one kind of bloom filter. Version 5
* changes versions in catalog table regions. Version 6 enables blockcaching on catalog tables.
* Version 7 introduces hfile -- hbase 0.19 to 0.20.. Version 8 introduces namespace
*/
// public static final String FILE_SYSTEM_VERSION = "6";
public static final String FILE_SYSTEM_VERSION = "8";
// Configuration parameters
// TODO: Is having HBase homed on port 60k OK?
/** Cluster is in distributed mode or not */
public static final String CLUSTER_DISTRIBUTED = "hbase.cluster.distributed";
/** Config for pluggable load balancers */
public static final String HBASE_MASTER_LOADBALANCER_CLASS = "hbase.master.loadbalancer.class";
/** Config for balancing the cluster by table */
public static final String HBASE_MASTER_LOADBALANCE_BYTABLE = "hbase.master.loadbalance.bytable";
/** Config for the max percent of regions in transition */
public static final String HBASE_MASTER_BALANCER_MAX_RIT_PERCENT =
"hbase.master.balancer.maxRitPercent";
/** Default value for the max percent of regions in transition */
public static final double DEFAULT_HBASE_MASTER_BALANCER_MAX_RIT_PERCENT = 1.0;
/** Config for the max balancing time */
public static final String HBASE_BALANCER_MAX_BALANCING = "hbase.balancer.max.balancing";
/** Config for the balancer period */
public static final String HBASE_BALANCER_PERIOD = "hbase.balancer.period";
/** Default value for the balancer period */
public static final int DEFAULT_HBASE_BALANCER_PERIOD = 300000;
/**
* Config key for enable/disable automatically separate child regions to different region servers
* in the procedure of split regions. One child will be kept to the server where parent region is
* on, and the other child will be assigned to a random server. See HBASE-25518.
*/
public static final String HBASE_ENABLE_SEPARATE_CHILD_REGIONS =
"hbase.master.auto.separate.child.regions.after.split.enabled";
/**
* Default value for automatically separate child regions to different region servers (set to
* "false" to keep all child regions to the server where parent region is on)
*/
public static final boolean DEFAULT_HBASE_ENABLE_SEPARATE_CHILD_REGIONS = false;
/** The name of the ensemble table */
public static final TableName ENSEMBLE_TABLE_NAME = TableName.valueOf("hbase:ensemble");
/** Config for pluggable region normalizer */
public static final String HBASE_MASTER_NORMALIZER_CLASS = "hbase.master.normalizer.class";
/** Cluster is standalone or pseudo-distributed */
public static final boolean CLUSTER_IS_LOCAL = false;
/** Default value for cluster distributed mode */
public static final boolean DEFAULT_CLUSTER_DISTRIBUTED = CLUSTER_IS_LOCAL;
/** default host address */
public static final String DEFAULT_HOST = "0.0.0.0";
/** Parameter name for port master listens on. */
public static final String MASTER_PORT = "hbase.master.port";
/** default port that the master listens on */
public static final int DEFAULT_MASTER_PORT = 16000;
/** default port for master web api */
public static final int DEFAULT_MASTER_INFOPORT = 16010;
/** Configuration key for master web API port */
public static final String MASTER_INFO_PORT = "hbase.master.info.port";
/** Configuration key for the list of master host:ports **/
public static final String MASTER_ADDRS_KEY = "hbase.masters";
/** Full class name of the Zookeeper based connection registry implementation */
public static final String ZK_CONNECTION_REGISTRY_CLASS =
"org.apache.hadoop.hbase.client.ZKConnectionRegistry";
/** Parameter name for the master type being backup (waits for primary to go inactive). */
public static final String MASTER_TYPE_BACKUP = "hbase.master.backup";
/**
* by default every master is a possible primary master unless the conf explicitly overrides it
*/
public static final boolean DEFAULT_MASTER_TYPE_BACKUP = false;
/** Name of ZooKeeper quorum configuration parameter. */
public static final String ZOOKEEPER_QUORUM = "hbase.zookeeper.quorum";
/** Name of ZooKeeper quorum configuration parameter for client to locate meta. */
public static final String CLIENT_ZOOKEEPER_QUORUM = "hbase.client.zookeeper.quorum";
/** Client port of ZooKeeper for client to locate meta */
public static final String CLIENT_ZOOKEEPER_CLIENT_PORT =
"hbase.client.zookeeper.property.clientPort";
/** Indicate whether the client ZK are observer nodes of the server ZK */
public static final String CLIENT_ZOOKEEPER_OBSERVER_MODE =
"hbase.client.zookeeper.observer.mode";
/** Assuming client zk not in observer mode and master need to synchronize information */
public static final boolean DEFAULT_CLIENT_ZOOKEEPER_OBSERVER_MODE = false;
/** Common prefix of ZooKeeper configuration properties */
public static final String ZK_CFG_PROPERTY_PREFIX = "hbase.zookeeper.property.";
public static final int ZK_CFG_PROPERTY_PREFIX_LEN = ZK_CFG_PROPERTY_PREFIX.length();
/**
* The ZK client port key in the ZK properties map. The name reflects the fact that this is not an
* HBase configuration key.
*/
public static final String CLIENT_PORT_STR = "clientPort";
/** Parameter name for the client port that the zookeeper listens on */
public static final String ZOOKEEPER_CLIENT_PORT = ZK_CFG_PROPERTY_PREFIX + CLIENT_PORT_STR;
/** Default client port that the zookeeper listens on */
public static final int DEFAULT_ZOOKEEPER_CLIENT_PORT = 2181;
/** Parameter name for the root dir in ZK for this cluster */
public static final String ZOOKEEPER_ZNODE_PARENT = "zookeeper.znode.parent";
public static final String DEFAULT_ZOOKEEPER_ZNODE_PARENT = "/hbase";
/**
* Parameter name for the limit on concurrent client-side zookeeper connections
*/
public static final String ZOOKEEPER_MAX_CLIENT_CNXNS = ZK_CFG_PROPERTY_PREFIX + "maxClientCnxns";
/** Parameter name for the ZK data directory */
public static final String ZOOKEEPER_DATA_DIR = ZK_CFG_PROPERTY_PREFIX + "dataDir";
/** Parameter name for the ZK tick time */
public static final String ZOOKEEPER_TICK_TIME = ZK_CFG_PROPERTY_PREFIX + "tickTime";
/** Default limit on concurrent client-side zookeeper connections */
public static final int DEFAULT_ZOOKEEPER_MAX_CLIENT_CNXNS = 300;
/** Configuration key for ZooKeeper session timeout */
public static final String ZK_SESSION_TIMEOUT = "zookeeper.session.timeout";
/** Timeout for the ZK sync() call */
public static final String ZK_SYNC_BLOCKING_TIMEOUT_MS = "hbase.zookeeper.sync.timeout.millis";
// Choice of the default value is based on the following ZK recommendation (from docs). Keeping it
// lower lets the callers fail fast in case of any issues.
// "The clients view of the system is guaranteed to be up-to-date within a certain time bound.
// (On the order of tens of seconds.) Either system changes will be seen by a client within this
// bound, or the client will detect a service outage."
public static final long ZK_SYNC_BLOCKING_TIMEOUT_DEFAULT_MS = 30 * 1000;
/** Default value for ZooKeeper session timeout */
public static final int DEFAULT_ZK_SESSION_TIMEOUT = 90 * 1000;
/** Parameter name for port region server listens on. */
public static final String REGIONSERVER_PORT = "hbase.regionserver.port";
/** Default port region server listens on. */
public static final int DEFAULT_REGIONSERVER_PORT = 16020;
/** default port for region server web api */
public static final int DEFAULT_REGIONSERVER_INFOPORT = 16030;
/** A configuration key for regionserver info port */
public static final String REGIONSERVER_INFO_PORT = "hbase.regionserver.info.port";
/** A flag that enables automatic selection of regionserver info port */
public static final String REGIONSERVER_INFO_PORT_AUTO = REGIONSERVER_INFO_PORT + ".auto";
/** Parameter name for what region server implementation to use. */
public static final String REGION_SERVER_IMPL = "hbase.regionserver.impl";
/** Parameter name for what master implementation to use. */
public static final String MASTER_IMPL = "hbase.master.impl";
/** Parameter name for how often threads should wake up */
public static final String THREAD_WAKE_FREQUENCY = "hbase.server.thread.wakefrequency";
/** Default value for thread wake frequency */
public static final int DEFAULT_THREAD_WAKE_FREQUENCY = 10 * 1000;
/** Parameter name for how often we should try to write a version file, before failing */
public static final String VERSION_FILE_WRITE_ATTEMPTS = "hbase.server.versionfile.writeattempts";
/** Parameter name for how often we should try to write a version file, before failing */
public static final int DEFAULT_VERSION_FILE_WRITE_ATTEMPTS = 3;
/** Parameter name and default value for how often a region should perform a major compaction */
public static final String MAJOR_COMPACTION_PERIOD = "hbase.hregion.majorcompaction";
public static final long DEFAULT_MAJOR_COMPACTION_PERIOD = 1000 * 60 * 60 * 24 * 7; // 7 days
/**
* Parameter name and default value for major compaction jitter. Used as a multiplier applied to
* {@link HConstants#MAJOR_COMPACTION_PERIOD} to cause compaction to occur a given amount of time
* either side of {@link HConstants#MAJOR_COMPACTION_PERIOD}. Default to 0.5 so jitter has us fall
* evenly either side of when the compaction should run.
*/
public static final String MAJOR_COMPACTION_JITTER = "hbase.hregion.majorcompaction.jitter";
public static final float DEFAULT_MAJOR_COMPACTION_JITTER = 0.50F;
/** Parameter name for the maximum batch of KVs to be used in flushes and compactions */
public static final String COMPACTION_KV_MAX = "hbase.hstore.compaction.kv.max";
public static final int COMPACTION_KV_MAX_DEFAULT = 10;
/** Parameter name for the scanner size limit to be used in compactions */
public static final String COMPACTION_SCANNER_SIZE_MAX =
"hbase.hstore.compaction.scanner.size.limit";
public static final long COMPACTION_SCANNER_SIZE_MAX_DEFAULT = 10 * 1024 * 1024L; // 10MB
/** Parameter name for HBase instance root directory */
public static final String HBASE_DIR = "hbase.rootdir";
/** Parameter name for HBase client IPC pool type */
public static final String HBASE_CLIENT_IPC_POOL_TYPE = "hbase.client.ipc.pool.type";
/** Parameter name for HBase client IPC pool size */
public static final String HBASE_CLIENT_IPC_POOL_SIZE = "hbase.client.ipc.pool.size";
/** Parameter name for HBase client operation timeout. */
public static final String HBASE_CLIENT_OPERATION_TIMEOUT = "hbase.client.operation.timeout";
/** Parameter name for HBase client meta operation timeout. */
public static final String HBASE_CLIENT_META_OPERATION_TIMEOUT =
"hbase.client.meta.operation.timeout";
/** Default HBase client operation timeout, which is tantamount to a blocking call */
public static final int DEFAULT_HBASE_CLIENT_OPERATION_TIMEOUT = 1200000;
/** Parameter name for HBase client meta replica scan call timeout. */
public static final String HBASE_CLIENT_META_REPLICA_SCAN_TIMEOUT =
"hbase.client.meta.replica.scan.timeout";
/** Default HBase client meta replica scan call timeout, 1 second */
public static final int HBASE_CLIENT_META_REPLICA_SCAN_TIMEOUT_DEFAULT = 1000000;
/** Used to construct the name of the log directory for a region server */
public static final String HREGION_LOGDIR_NAME = "WALs";
/** Used to construct the name of the splitlog directory for a region server */
public static final String SPLIT_LOGDIR_NAME = "splitWAL";
/** Like the previous, but for old logs that are about to be deleted */
public static final String HREGION_OLDLOGDIR_NAME = "oldWALs";
/** Staging dir used by bulk load */
public static final String BULKLOAD_STAGING_DIR_NAME = "staging";
public static final String CORRUPT_DIR_NAME = "corrupt";
/** Used by HBCK to sideline backup data */
public static final String HBCK_SIDELINEDIR_NAME = ".hbck";
/** Any artifacts left from migration can be moved here */
public static final String MIGRATION_NAME = ".migration";
/** Used to construct the name of the compaction directory during compaction */
public static final String HREGION_COMPACTIONDIR_NAME = "compaction.dir";
/** Conf key for the max file size after which we split the region */
public static final String HREGION_MAX_FILESIZE = "hbase.hregion.max.filesize";
/** Default maximum file size */
public static final long DEFAULT_MAX_FILE_SIZE = 10 * 1024 * 1024 * 1024L;
/** Conf key for if we should sum overall region files size when check to split */
public static final String OVERALL_HREGION_FILES = "hbase.hregion.split.overallfiles";
/** Default overall region files */
public static final boolean DEFAULT_OVERALL_HREGION_FILES = true;
/**
* Max size of single row for Get's or Scan's without in-row scanning flag set.
*/
public static final String TABLE_MAX_ROWSIZE_KEY = "hbase.table.max.rowsize";
/**
* Default max row size (1 Gb).
*/
public static final long TABLE_MAX_ROWSIZE_DEFAULT = 1024 * 1024 * 1024L;
/**
* The max number of threads used for opening and closing stores or store files in parallel
*/
public static final String HSTORE_OPEN_AND_CLOSE_THREADS_MAX =
"hbase.hstore.open.and.close.threads.max";
/**
* The default number for the max number of threads used for opening and closing stores or store
* files in parallel
*/
public static final int DEFAULT_HSTORE_OPEN_AND_CLOSE_THREADS_MAX = 1;
/**
* Block updates if memstore has hbase.hregion.memstore.block.multiplier times
* hbase.hregion.memstore.flush.size bytes. Useful preventing runaway memstore during spikes in
* update traffic.
*/
public static final String HREGION_MEMSTORE_BLOCK_MULTIPLIER =
"hbase.hregion.memstore.block.multiplier";
/**
* Default value for hbase.hregion.memstore.block.multiplier
*/
public static final int DEFAULT_HREGION_MEMSTORE_BLOCK_MULTIPLIER = 4;
/** Conf key for the memstore size at which we flush the memstore */
public static final String HREGION_MEMSTORE_FLUSH_SIZE = "hbase.hregion.memstore.flush.size";
public static final String HREGION_EDITS_REPLAY_SKIP_ERRORS =
"hbase.hregion.edits.replay.skip.errors";
public static final boolean DEFAULT_HREGION_EDITS_REPLAY_SKIP_ERRORS = false;
/** Maximum value length, enforced on KeyValue construction */
public static final int MAXIMUM_VALUE_LENGTH = Integer.MAX_VALUE - 1;
/** name of the file for unique cluster ID */
public static final String CLUSTER_ID_FILE_NAME = "hbase.id";
/** Default value for cluster ID */
public static final String CLUSTER_ID_DEFAULT = "default-cluster";
/** Parameter name for # days to keep MVCC values during a major compaction */
public static final String KEEP_SEQID_PERIOD = "hbase.hstore.compaction.keep.seqId.period";
/** At least to keep MVCC values in hfiles for 5 days */
public static final int MIN_KEEP_SEQID_PERIOD = 5;
// Always store the location of the root table's HRegion.
// This HRegion is never split.
// region name = table + startkey + regionid. This is the row key.
// each row in the root and meta tables describes exactly 1 region
// Do we ever need to know all the information that we are storing?
// Note that the name of the root table starts with "-" and the name of the
// meta table starts with "." Why? it's a trick. It turns out that when we
// store region names in memory, we use a SortedMap. Since "-" sorts before
// "." (and since no other table name can start with either of these
// characters, the root region will always be the first entry in such a Map,
// followed by all the meta regions (which will be ordered by their starting
// row key as well), followed by all user tables. So when the Master is
// choosing regions to assign, it will always choose the root region first,
// followed by the meta regions, followed by user regions. Since the root
// and meta regions always need to be on-line, this ensures that they will
// be the first to be reassigned if the server(s) they are being served by
// should go down.
public static final String BASE_NAMESPACE_DIR = "data";
/** delimiter used between portions of a region name */
public static final int META_ROW_DELIMITER = ',';
/** The catalog family as a string */
public static final String CATALOG_FAMILY_STR = "info";
/** The catalog family */
public static final byte[] CATALOG_FAMILY = Bytes.toBytes(CATALOG_FAMILY_STR);
/** The RegionInfo qualifier as a string */
public static final String REGIONINFO_QUALIFIER_STR = "regioninfo";
/** The regioninfo column qualifier */
public static final byte[] REGIONINFO_QUALIFIER = Bytes.toBytes(REGIONINFO_QUALIFIER_STR);
/** The server column qualifier */
public static final String SERVER_QUALIFIER_STR = "server";
/** The server column qualifier */
public static final byte[] SERVER_QUALIFIER = Bytes.toBytes(SERVER_QUALIFIER_STR);
/** The startcode column qualifier */
public static final String STARTCODE_QUALIFIER_STR = "serverstartcode";
/** The startcode column qualifier */
public static final byte[] STARTCODE_QUALIFIER = Bytes.toBytes(STARTCODE_QUALIFIER_STR);
/** The open seqnum column qualifier */
public static final String SEQNUM_QUALIFIER_STR = "seqnumDuringOpen";
/** The open seqnum column qualifier */
public static final byte[] SEQNUM_QUALIFIER = Bytes.toBytes(SEQNUM_QUALIFIER_STR);
/** The state column qualifier */
public static final String STATE_QUALIFIER_STR = "state";
public static final byte[] STATE_QUALIFIER = Bytes.toBytes(STATE_QUALIFIER_STR);
/**
* The serverName column qualifier. Its the server where the region is transitioning on, while
* column server is the server where the region is opened on. They are the same when the region is
* in state OPEN.
*/
public static final String SERVERNAME_QUALIFIER_STR = "sn";
public static final byte[] SERVERNAME_QUALIFIER = Bytes.toBytes(SERVERNAME_QUALIFIER_STR);
/** The lower-half split region column qualifier string. */
public static final String SPLITA_QUALIFIER_STR = "splitA";
/** The lower-half split region column qualifier */
public static final byte[] SPLITA_QUALIFIER = Bytes.toBytes(SPLITA_QUALIFIER_STR);
/** The upper-half split region column qualifier String. */
public static final String SPLITB_QUALIFIER_STR = "splitB";
/** The upper-half split region column qualifier */
public static final byte[] SPLITB_QUALIFIER = Bytes.toBytes(SPLITB_QUALIFIER_STR);
/**
* Merge qualifier prefix. We used to only allow two regions merge; mergeA and mergeB. Now we
* allow many to merge. Each region to merge will be referenced in a column whose qualifier starts
* with this define.
*/
public static final String MERGE_QUALIFIER_PREFIX_STR = "merge";
public static final byte[] MERGE_QUALIFIER_PREFIX = Bytes.toBytes(MERGE_QUALIFIER_PREFIX_STR);
/**
* The lower-half merge region column qualifier
* @deprecated Since 2.3.0 and 2.2.1. Not used anymore. Instead we look for the
* {@link #MERGE_QUALIFIER_PREFIX_STR} prefix.
*/
@Deprecated
public static final byte[] MERGEA_QUALIFIER = Bytes.toBytes(MERGE_QUALIFIER_PREFIX_STR + "A");
/**
* The upper-half merge region column qualifier
* @deprecated Since 2.3.0 and 2.2.1. Not used anymore. Instead we look for the
* {@link #MERGE_QUALIFIER_PREFIX_STR} prefix.
*/
@Deprecated
public static final byte[] MERGEB_QUALIFIER = Bytes.toBytes(MERGE_QUALIFIER_PREFIX_STR + "B");
/** The catalog family as a string */
public static final String TABLE_FAMILY_STR = "table";
/** The catalog family */
public static final byte[] TABLE_FAMILY = Bytes.toBytes(TABLE_FAMILY_STR);
/** The serialized table state qualifier */
public static final byte[] TABLE_STATE_QUALIFIER = Bytes.toBytes("state");
/** The replication barrier family as a string */
public static final String REPLICATION_BARRIER_FAMILY_STR = "rep_barrier";
/** The replication barrier family */
public static final byte[] REPLICATION_BARRIER_FAMILY =
Bytes.toBytes(REPLICATION_BARRIER_FAMILY_STR);
/** The namespace family as a string */
public static final String NAMESPACE_FAMILY_STR = "ns";
/** The namespace family */
public static final byte[] NAMESPACE_FAMILY = Bytes.toBytes(NAMESPACE_FAMILY_STR);
public static final byte[] NAMESPACE_COL_DESC_QUALIFIER = Bytes.toBytes("d");
/**
* The meta table version column qualifier. We keep current version of the meta table in this
* column in -ROOT- table: i.e. in the 'info:v' column.
*/
public static final byte[] META_VERSION_QUALIFIER = Bytes.toBytes("v");
/** The family str as a key in map */
public static final String FAMILY_KEY_STR = "family";
/**
* The current version of the meta table. - pre-hbase 0.92. There is no META_VERSION column in the
* root table in this case. The meta has HTableDescriptor serialized into the HRegionInfo; -
* version 0 is 0.92 and 0.94. Meta data has serialized HRegionInfo's using Writable
* serialization, and HRegionInfo's does not contain HTableDescriptors. - version 1 for 0.96+
* keeps HRegionInfo data structures, but changes the byte[] serialization from Writables to
* Protobuf. See HRegionInfo.VERSION
*/
public static final short META_VERSION = 1;
// Other constants
/**
* An empty byte array instance.
*/
public static final byte[] EMPTY_BYTE_ARRAY = new byte[0];
/**
* An empty string instance.
*/
public static final String EMPTY_STRING = "";
public static final ByteBuffer EMPTY_BYTE_BUFFER = ByteBuffer.wrap(EMPTY_BYTE_ARRAY);
/**
* Used by scanners, etc when they want to start at the beginning of a region
*/
public static final byte[] EMPTY_START_ROW = EMPTY_BYTE_ARRAY;
/**
* Last row in a table.
*/
public static final byte[] EMPTY_END_ROW = EMPTY_BYTE_ARRAY;
/**
* Used by scanners and others when they're trying to detect the end of a table
*/
public static final byte[] LAST_ROW = EMPTY_BYTE_ARRAY;
/**
* Max length a row can have because of the limitation in TFile.
*/
public static final int MAX_ROW_LENGTH = Short.MAX_VALUE;
/**
* Timestamp to use when we want to refer to the latest cell. On client side, this is the
* timestamp set by default when no timestamp is specified, to refer to the latest. On server
* side, this acts as a notation. (1) For a cell of Put, which has this notation, its timestamp
* will be replaced with server's current time. (2) For a cell of Delete, which has this notation,
* A. If the cell is of {@link KeyValue.Type#Delete}, HBase issues a Get operation firstly. a.
* When the count of cell it gets is less than the count of cell to delete, the timestamp of
* Delete cell will be replaced with server's current time. b. When the count of cell it gets is
* equal to the count of cell to delete, the timestamp of Delete cell will be replaced with the
* latest timestamp of cell it gets. (c. It is invalid and an exception will be thrown, if the
* count of cell it gets is greater than the count of cell to delete, as the max version of Get is
* set to the count of cell to delete.) B. If the cell is of other Delete types, like
* {@link KeyValue.Type#DeleteFamilyVersion}, {@link KeyValue.Type#DeleteColumn}, or
* {@link KeyValue.Type#DeleteFamily}, the timestamp of Delete cell will be replaced with server's
* current time. So that is why it is named as "latest" but assigned as the max value of Long.
*/
public static final long LATEST_TIMESTAMP = Long.MAX_VALUE;
/**
* LATEST_TIMESTAMP in bytes form
*/
public static final byte[] LATEST_TIMESTAMP_BYTES = {
// big-endian
(byte) (LATEST_TIMESTAMP >>> 56), (byte) (LATEST_TIMESTAMP >>> 48),
(byte) (LATEST_TIMESTAMP >>> 40), (byte) (LATEST_TIMESTAMP >>> 32),
(byte) (LATEST_TIMESTAMP >>> 24), (byte) (LATEST_TIMESTAMP >>> 16),
(byte) (LATEST_TIMESTAMP >>> 8), (byte) LATEST_TIMESTAMP, };
/**
* Define for 'return-all-versions'.
*/
public static final int ALL_VERSIONS = Integer.MAX_VALUE;
/**
* Unlimited time-to-live.
*/
// public static final int FOREVER = -1;
public static final int FOREVER = Integer.MAX_VALUE;
/**
* Seconds in a day, hour and minute
*/
public static final int DAY_IN_SECONDS = 24 * 60 * 60;
public static final int HOUR_IN_SECONDS = 60 * 60;
public static final int MINUTE_IN_SECONDS = 60;
/**
* KB, MB, GB, TB equivalent to how many bytes
*/
public static final long KB_IN_BYTES = 1024;
public static final long MB_IN_BYTES = 1024 * KB_IN_BYTES;
public static final long GB_IN_BYTES = 1024 * MB_IN_BYTES;
public static final long TB_IN_BYTES = 1024 * GB_IN_BYTES;
// TODO: although the following are referenced widely to format strings for
// the shell. They really aren't a part of the public API. It would be
// nice if we could put them somewhere where they did not need to be
// public. They could have package visibility
public static final String NAME = "NAME";
public static final String VERSIONS = "VERSIONS";
public static final String IN_MEMORY = "IN_MEMORY";
public static final String METADATA = "METADATA";
public static final String CONFIGURATION = "CONFIGURATION";
/**
* Retrying we multiply hbase.client.pause setting by what we have in this array until we run out
* of array items. Retries beyond this use the last number in the array. So, for example, if
* hbase.client.pause is 1 second, and maximum retries count hbase.client.retries.number is 10, we
* will retry at the following intervals: 1, 2, 3, 5, 10, 20, 40, 100, 100, 100. With 100ms, a
* back-off of 200 means 20s
*/
public static final int[] RETRY_BACKOFF =
{ 1, 2, 3, 5, 10, 20, 40, 100, 100, 100, 100, 200, 200 };
public static final String REGION_IMPL = "hbase.hregion.impl";
/**
* Scope tag for locally scoped data. This data will not be replicated.
*/
public static final int REPLICATION_SCOPE_LOCAL = 0;
/**
* Scope tag for globally scoped data. This data will be replicated to all peers.
*/
public static final int REPLICATION_SCOPE_GLOBAL = 1;
/**
* Default cluster ID, cannot be used to identify a cluster so a key with this value means it
* wasn't meant for replication.
*/
public static final UUID DEFAULT_CLUSTER_ID = new UUID(0L, 0L);
/**
* Parameter name for maximum number of bytes returned when calling a scanner's next method.
* Controlled by the client.
*/
public static final String HBASE_CLIENT_SCANNER_MAX_RESULT_SIZE_KEY =
"hbase.client.scanner.max.result.size";
/**
* Parameter name for maximum number of bytes returned when calling a scanner's next method.
* Controlled by the server.
*/
public static final String HBASE_SERVER_SCANNER_MAX_RESULT_SIZE_KEY =
"hbase.server.scanner.max.result.size";
/**
* Maximum number of bytes returned when calling a scanner's next method. Note that when a single
* row is larger than this limit the row is still returned completely. The default value is 2MB.
*/
public static final long DEFAULT_HBASE_CLIENT_SCANNER_MAX_RESULT_SIZE = 2 * 1024 * 1024;
/**
* Maximum number of bytes returned when calling a scanner's next method. Note that when a single
* row is larger than this limit the row is still returned completely. Safety setting to protect
* the region server. The default value is 100MB. (a client would rarely request larger chunks on
* purpose)
*/
public static final long DEFAULT_HBASE_SERVER_SCANNER_MAX_RESULT_SIZE = 100 * 1024 * 1024;
/**
* Parameter name for client pause value, used mostly as value to wait before running a retry of a
* failed get, region lookup, etc.
*/
public static final String HBASE_CLIENT_PAUSE = "hbase.client.pause";
/**
* Default value of {@link #HBASE_CLIENT_PAUSE}.
*/
public static final long DEFAULT_HBASE_CLIENT_PAUSE = 100;
/**
* Parameter name for client pause value for special case such as call queue too big, etc.
* @deprecated Since 2.5.0, will be removed in 4.0.0. Please use
* hbase.client.pause.server.overloaded instead.
*/
@Deprecated
public static final String HBASE_CLIENT_PAUSE_FOR_CQTBE = "hbase.client.pause.cqtbe";
/**
* The maximum number of concurrent connections the client will maintain.
*/
public static final String HBASE_CLIENT_MAX_TOTAL_TASKS = "hbase.client.max.total.tasks";
/**
* Default value of {@link #HBASE_CLIENT_MAX_TOTAL_TASKS}.
*/
public static final int DEFAULT_HBASE_CLIENT_MAX_TOTAL_TASKS = 100;
/**
* The maximum number of concurrent connections the client will maintain to a single RegionServer.
*/
public static final String HBASE_CLIENT_MAX_PERSERVER_TASKS = "hbase.client.max.perserver.tasks";
/**
* Default value of {@link #HBASE_CLIENT_MAX_PERSERVER_TASKS}.
*/
public static final int DEFAULT_HBASE_CLIENT_MAX_PERSERVER_TASKS = 2;
/**
* The maximum number of concurrent connections the client will maintain to a single Region.
*/
public static final String HBASE_CLIENT_MAX_PERREGION_TASKS = "hbase.client.max.perregion.tasks";
/**
* Default value of {@link #HBASE_CLIENT_MAX_PERREGION_TASKS}.
*/
public static final int DEFAULT_HBASE_CLIENT_MAX_PERREGION_TASKS = 1;
/**
* The maximum number of concurrent pending RPC requests for one server in process level.
*/
public static final String HBASE_CLIENT_PERSERVER_REQUESTS_THRESHOLD =
"hbase.client.perserver.requests.threshold";
/**
* Default value of {@link #HBASE_CLIENT_PERSERVER_REQUESTS_THRESHOLD}.
*/
public static final int DEFAULT_HBASE_CLIENT_PERSERVER_REQUESTS_THRESHOLD = Integer.MAX_VALUE;
/**
* Parameter name for server pause value, used mostly as value to wait before running a retry of a
* failed operation.
*/
public static final String HBASE_SERVER_PAUSE = "hbase.server.pause";
/**
* Default value of {@link #HBASE_SERVER_PAUSE}.
*/
public static final int DEFAULT_HBASE_SERVER_PAUSE = 1000;
/**
* Parameter name for maximum retries, used as maximum for all retryable operations such as
* fetching of the root region from root region server, getting a cell's value, starting a row
* update, etc.
*/
public static final String HBASE_CLIENT_RETRIES_NUMBER = "hbase.client.retries.number";
/**
* Default value of {@link #HBASE_CLIENT_RETRIES_NUMBER}.
*/
public static final int DEFAULT_HBASE_CLIENT_RETRIES_NUMBER = 15;
public static final String HBASE_CLIENT_SERVERSIDE_RETRIES_MULTIPLIER =
"hbase.client.serverside.retries.multiplier";
public static final int DEFAULT_HBASE_CLIENT_SERVERSIDE_RETRIES_MULTIPLIER = 3;
/**
* Parameter name to set the default scanner caching for all clients.
*/
public static final String HBASE_CLIENT_SCANNER_CACHING = "hbase.client.scanner.caching";
/**
* Default value for {@link #HBASE_CLIENT_SCANNER_CACHING}
*/
public static final int DEFAULT_HBASE_CLIENT_SCANNER_CACHING = Integer.MAX_VALUE;
/**
* Parameter name for number of rows that will be fetched when calling next on a scanner if it is
* not served from memory. Higher caching values will enable faster scanners but will eat up more
* memory and some calls of next may take longer and longer times when the cache is empty.
*/
public static final String HBASE_META_SCANNER_CACHING = "hbase.meta.scanner.caching";
/**
* Default value of {@link #HBASE_META_SCANNER_CACHING}.
*/
public static final int DEFAULT_HBASE_META_SCANNER_CACHING = 100;
/**
* Parameter name for number of versions, kept by meta table.
*/
public static final String HBASE_META_VERSIONS = "hbase.meta.versions";
/**
* Default value of {@link #HBASE_META_VERSIONS}.
*/
public static final int DEFAULT_HBASE_META_VERSIONS = 3;
/**
* Parameter name for number of versions, kept by meta table.
*/
public static final String HBASE_META_BLOCK_SIZE = "hbase.meta.blocksize";
/**
* Default value of {@link #HBASE_META_BLOCK_SIZE}.
*/
public static final int DEFAULT_HBASE_META_BLOCK_SIZE = 8 * 1024;
/**
* Parameter name for unique identifier for this {@link org.apache.hadoop.conf.Configuration}
* instance. If there are two or more {@link org.apache.hadoop.conf.Configuration} instances that,
* for all intents and purposes, are the same except for their instance ids, then they will not be
* able to share the same org.apache.hadoop.hbase.client.HConnection instance. On the other hand,
* even if the instance ids are the same, it could result in non-shared
* org.apache.hadoop.hbase.client.HConnection instances if some of the other connection parameters
* differ.
*/
public static final String HBASE_CLIENT_INSTANCE_ID = "hbase.client.instance.id";
/**
* The client scanner timeout period in milliseconds.
*/
public static final String HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD =
"hbase.client.scanner.timeout.period";
/**
* Default value of {@link #HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD}.
*/
public static final int DEFAULT_HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD = 60000;
/**
* timeout for each RPC
*/
public static final String HBASE_RPC_TIMEOUT_KEY = "hbase.rpc.timeout";
/**
* timeout for each read RPC
*/
public static final String HBASE_RPC_READ_TIMEOUT_KEY = "hbase.rpc.read.timeout";
/**
* timeout for each write RPC
*/
public static final String HBASE_RPC_WRITE_TIMEOUT_KEY = "hbase.rpc.write.timeout";
/**
* Default value of {@link #HBASE_RPC_TIMEOUT_KEY}
*/
public static final int DEFAULT_HBASE_RPC_TIMEOUT = 60000;
/**
* timeout for short operation RPC
*/
public static final String HBASE_RPC_SHORTOPERATION_TIMEOUT_KEY =
"hbase.rpc.shortoperation.timeout";
/**
* Default value of {@link #HBASE_RPC_SHORTOPERATION_TIMEOUT_KEY}
*/
public static final int DEFAULT_HBASE_RPC_SHORTOPERATION_TIMEOUT = 10000;
/**
* Retry pause time for short operation RPC
*/
public static final String HBASE_RPC_SHORTOPERATION_RETRY_PAUSE_TIME =
"hbase.rpc.shortoperation.retry.pause.time";
/**
* Default value of {@link #HBASE_RPC_SHORTOPERATION_RETRY_PAUSE_TIME}
*/
public static final long DEFAULT_HBASE_RPC_SHORTOPERATION_RETRY_PAUSE_TIME = 1000;
/**
* Value indicating the server name was saved with no sequence number.
*/
public static final long NO_SEQNUM = -1;
/**
* Registry implementation to be used on the client side.
*/
public static final String CLIENT_CONNECTION_REGISTRY_IMPL_CONF_KEY =
"hbase.client.registry.impl";
/*
* cluster replication constants.
*/
public static final String REPLICATION_SOURCE_SERVICE_CLASSNAME =
"hbase.replication.source.service";
public static final String REPLICATION_SERVICE_CLASSNAME_DEFAULT =
"org.apache.hadoop.hbase.replication.regionserver.Replication";
public static final String REPLICATION_SINK_SERVICE_CLASSNAME = "hbase.replication.sink.service";
public static final String REPLICATION_SINK_SERVICE_CLASSNAME_DEFAULT =
"org.apache.hadoop.hbase.replication.ReplicationSinkServiceImpl";
public static final String REPLICATION_BULKLOAD_ENABLE_KEY = "hbase.replication.bulkload.enabled";
public static final boolean REPLICATION_BULKLOAD_ENABLE_DEFAULT = false;
/** Replication cluster id of source cluster which uniquely identifies itself with peer cluster */
public static final String REPLICATION_CLUSTER_ID = "hbase.replication.cluster.id";
/**
* Max total size of buffered entries in all replication peers. It will prevent server getting OOM
* if there are many peers. Default value is 256MB which is four times to default
* replication.source.size.capacity.
*/
public static final String REPLICATION_SOURCE_TOTAL_BUFFER_KEY = "replication.total.buffer.quota";
public static final int REPLICATION_SOURCE_TOTAL_BUFFER_DFAULT = 256 * 1024 * 1024;
/** Configuration key for ReplicationSource shipeEdits timeout */
public static final String REPLICATION_SOURCE_SHIPEDITS_TIMEOUT =
"replication.source.shipedits.timeout";
public static final int REPLICATION_SOURCE_SHIPEDITS_TIMEOUT_DFAULT = 60000;
/**
* Directory where the source cluster file system client configuration are placed which is used by
* sink cluster to copy HFiles from source cluster file system
*/
public static final String REPLICATION_CONF_DIR = "hbase.replication.conf.dir";
/** Maximum time to retry for a failed bulk load request */
public static final String BULKLOAD_MAX_RETRIES_NUMBER = "hbase.bulkload.retries.number";
public static final String KEY_FOR_HOSTNAME_SEEN_BY_MASTER =
"hbase.regionserver.hostname.seen.by.master";
public static final String HBASE_MASTER_LOGCLEANER_PLUGINS = "hbase.master.logcleaner.plugins";
public static final String HBASE_REGION_SPLIT_POLICY_KEY =
"hbase.regionserver.region.split.policy";
/** Whether nonces are enabled; default is true. */
public static final String HBASE_RS_NONCES_ENABLED = "hbase.regionserver.nonces.enabled";
/**
* Configuration key for the size of the block cache
*/
public static final String HFILE_BLOCK_CACHE_SIZE_KEY = "hfile.block.cache.size";
public static final float HFILE_BLOCK_CACHE_SIZE_DEFAULT = 0.4f;
/**
* Configuration key for setting the fix size of the block size, default do nothing and it should
* be explicitly set by user or only used within ClientSideRegionScanner. if it's set less than
* current max on heap size, it overrides the max size of block cache
*/
public static final String HFILE_ONHEAP_BLOCK_CACHE_FIXED_SIZE_KEY =
"hfile.onheap.block.cache.fixed.size";
public static final long HFILE_ONHEAP_BLOCK_CACHE_FIXED_SIZE_DEFAULT = 0L;
public static final long HBASE_CLIENT_SCANNER_ONHEAP_BLOCK_CACHE_FIXED_SIZE_DEFAULT =
32 * 1024 * 1024L;
/**
* Configuration key for setting pread must read both necessaryLen and extraLen, default is
* disabled. This is an optimized flag for reading HFile from blob storage.
*/
public static final String HFILE_PREAD_ALL_BYTES_ENABLED_KEY = "hfile.pread.all.bytes.enabled";
public static final boolean HFILE_PREAD_ALL_BYTES_ENABLED_DEFAULT = false;
/*
* Minimum percentage of free heap necessary for a successful cluster startup.
*/
public static final float HBASE_CLUSTER_MINIMUM_MEMORY_THRESHOLD = 0.2f;
public static final String CP_HTD_ATTR_INCLUSION_KEY =
"hbase.coprocessor.classloader.included.classes";
/** The delay when re-trying a socket operation in a loop (HBASE-4712) */
public static final int SOCKET_RETRY_WAIT_MS = 200;
/** Host name of the local machine */
public static final String LOCALHOST = "localhost";
/**
* If this parameter is set to true, then hbase will read data and then verify checksums. Checksum
* verification inside hdfs will be switched off. However, if the hbase-checksum verification
* fails, then it will switch back to using hdfs checksums for verifiying data that is being read
* from storage. If this parameter is set to false, then hbase will not verify any checksums,
* instead it will depend on checksum verification being done in the hdfs client.
*/
public static final String HBASE_CHECKSUM_VERIFICATION = "hbase.regionserver.checksum.verify";
public static final String LOCALHOST_IP = "127.0.0.1";
public static final String REGION_SERVER_HANDLER_COUNT = "hbase.regionserver.handler.count";
public static final int DEFAULT_REGION_SERVER_HANDLER_COUNT = 30;
/*
* REGION_SERVER_HANDLER_ABORT_ON_ERROR_PERCENT: -1 => Disable aborting 0 => Abort if even a
* single handler has died 0.x => Abort only when this percent of handlers have died 1 => Abort
* only all of the handers have died
*/
public static final String REGION_SERVER_HANDLER_ABORT_ON_ERROR_PERCENT =
"hbase.regionserver.handler.abort.on.error.percent";
public static final double DEFAULT_REGION_SERVER_HANDLER_ABORT_ON_ERROR_PERCENT = 0.5;
// High priority handlers to deal with admin requests and system table operation requests
public static final String REGION_SERVER_HIGH_PRIORITY_HANDLER_COUNT =
"hbase.regionserver.metahandler.count";
public static final int DEFAULT_REGION_SERVER_HIGH_PRIORITY_HANDLER_COUNT = 20;
public static final String REGION_SERVER_REPLICATION_HANDLER_COUNT =
"hbase.regionserver.replication.handler.count";
public static final int DEFAULT_REGION_SERVER_REPLICATION_HANDLER_COUNT = 3;
public static final String REGION_SERVER_BULKLOAD_HANDLER_COUNT =
"hbase.regionserver.bulkload.handler.count";
public static final int DEFAULT_REGION_SERVER_BULKLOAD_HANDLER_COUNT = 0;
// Meta Transition handlers to deal with meta ReportRegionStateTransitionRequest. Meta transition
// should be dealt with in a separate handler in case blocking other region's transition.
public static final String MASTER_META_TRANSITION_HANDLER_COUNT =
"hbase.master.meta.transition.handler.count";
public static final int MASTER__META_TRANSITION_HANDLER_COUNT_DEFAULT = 1;
/** Conf key for enabling meta replication */
public static final String USE_META_REPLICAS = "hbase.meta.replicas.use";
public static final boolean DEFAULT_USE_META_REPLICAS = false;
/**
* @deprecated Since 2.4.0, will be removed in 4.0.0. Please change the meta replicas number by
* altering meta table, i.e, set a new 'region replication' number and call
* modifyTable.
*/
@Deprecated
public static final String META_REPLICAS_NUM = "hbase.meta.replica.count";
/**
* @deprecated Since 2.4.0, will be removed in 4.0.0. Please change the meta replicas number by
* altering meta table, i.e, set a new 'region replication' number and call
* modifyTable.
*/
@Deprecated
public static final int DEFAULT_META_REPLICA_NUM = 1;
/**
* The name of the configuration parameter that specifies the number of bytes in a newly created
* checksum chunk.
*/
public static final String BYTES_PER_CHECKSUM = "hbase.hstore.bytes.per.checksum";
/**
* The name of the configuration parameter that specifies the name of an algorithm that is used to
* compute checksums for newly created blocks.
*/
public static final String CHECKSUM_TYPE_NAME = "hbase.hstore.checksum.algorithm";
/** Enable file permission modification from standard hbase */
public static final String ENABLE_DATA_FILE_UMASK = "hbase.data.umask.enable";
/** File permission umask to use when creating hbase data files */
public static final String DATA_FILE_UMASK_KEY = "hbase.data.umask";
/** Configuration name of WAL Compression */
public static final String ENABLE_WAL_COMPRESSION = "hbase.regionserver.wal.enablecompression";
/**
* Configuration name of WAL storage policy Valid values are: HOT, COLD, WARM, ALL_SSD, ONE_SSD,
* LAZY_PERSIST See
* http://hadoop.apache.org/docs/r2.7.3/hadoop-project-dist/hadoop-hdfs/ArchivalStorage.html
*/
public static final String WAL_STORAGE_POLICY = "hbase.wal.storage.policy";
/**
* "NONE" is not a valid storage policy and means we defer the policy to HDFS. @see
* HBASE-20691
*/
public static final String DEFER_TO_HDFS_STORAGE_POLICY = "NONE";
/** By default we defer the WAL storage policy to HDFS */
public static final String DEFAULT_WAL_STORAGE_POLICY = DEFER_TO_HDFS_STORAGE_POLICY;
/** Region in Transition metrics threshold time */
public static final String METRICS_RIT_STUCK_WARNING_THRESHOLD =
"hbase.metrics.rit.stuck.warning.threshold";
public static final String LOAD_BALANCER_SLOP_KEY = "hbase.regions.slop";
/** delimiter used between portions of a region name */
public static final int DELIMITER = ',';
/**
* QOS attributes: these attributes are used to demarcate RPC call processing by different set of
* handlers. For example, HIGH_QOS tagged methods are handled by high priority handlers.
*/
// normal_QOS < replication_QOS < replay_QOS < QOS_threshold < admin_QOS < high_QOS < meta_QOS
public static final int PRIORITY_UNSET = -1;
public static final int NORMAL_QOS = 0;
public static final int REPLICATION_QOS = 5;
public static final int BULKLOAD_QOS = 4;
/**
* @deprecated since 3.0.0, will be removed in 4.0.0. DLR has been purged for a long time and
* region replication has its own 'replay' method.
*/
@Deprecated
public static final int REPLAY_QOS = 6;
public static final int REGION_REPLICATION_QOS = REPLAY_QOS;
public static final int QOS_THRESHOLD = 10;
public static final int ADMIN_QOS = 100;
public static final int HIGH_QOS = 200;
public static final int SYSTEMTABLE_QOS = HIGH_QOS;
/** Directory under /hbase where archived hfiles are stored */
public static final String HFILE_ARCHIVE_DIRECTORY = "archive";
/**
* Name of the directory to store all snapshots. See SnapshotDescriptionUtils for remaining
* snapshot constants; this is here to keep HConstants dependencies at a minimum and
* uni-directional.
*/
public static final String SNAPSHOT_DIR_NAME = ".hbase-snapshot";
/* Name of old snapshot directory. See HBASE-8352 for details on why it needs to be renamed */
public static final String OLD_SNAPSHOT_DIR_NAME = ".snapshot";
/** Temporary directory used for table creation and deletion */
public static final String HBASE_TEMP_DIRECTORY = ".tmp";
/**
* The period (in milliseconds) between computing region server point in time metrics
*/
public static final String REGIONSERVER_METRICS_PERIOD = "hbase.regionserver.metrics.period";
public static final long DEFAULT_REGIONSERVER_METRICS_PERIOD = 5000;
/** Directories that are not HBase table directories */
public static final List HBASE_NON_TABLE_DIRS = Collections.unmodifiableList(
Arrays.asList(new String[] { HBCK_SIDELINEDIR_NAME, HBASE_TEMP_DIRECTORY, MIGRATION_NAME }));
/**
* Directories that are not HBase user table directories.
* @deprecated Since hbase-2.3.0; no replacement as not used any more (internally at least)
*/
@Deprecated
public static final List HBASE_NON_USER_TABLE_DIRS =
Collections.unmodifiableList(Arrays.asList(
(String[]) ArrayUtils.addAll(new String[] { TableName.META_TABLE_NAME.getNameAsString() },
HBASE_NON_TABLE_DIRS.toArray())));
/** Health script related settings. */
public static final String HEALTH_SCRIPT_LOC = "hbase.node.health.script.location";
public static final String HEALTH_SCRIPT_TIMEOUT = "hbase.node.health.script.timeout";
public static final String HEALTH_CHORE_WAKE_FREQ = "hbase.node.health.script.frequency";
public static final long DEFAULT_HEALTH_SCRIPT_TIMEOUT = 60000;
/**
* The maximum number of health check failures a server can encounter consecutively.
*/
public static final String HEALTH_FAILURE_THRESHOLD = "hbase.node.health.failure.threshold";
public static final int DEFAULT_HEALTH_FAILURE_THRESHOLD = 3;
public static final String EXECUTOR_STATUS_COLLECT_ENABLED =
"hbase.executors.status.collect.enabled";
public static final boolean DEFAULT_EXECUTOR_STATUS_COLLECT_ENABLED = true;
/**
* Setting to activate, or not, the publication of the status by the master. Default notification
* is by a multicast message.
*/
public static final String STATUS_PUBLISHED = "hbase.status.published";
public static final boolean STATUS_PUBLISHED_DEFAULT = false;
/**
* IP to use for the multicast status messages between the master and the clients. The default
* address is chosen as one among others within the ones suitable for multicast messages.
*/
public static final String STATUS_MULTICAST_ADDRESS = "hbase.status.multicast.address.ip";
public static final String DEFAULT_STATUS_MULTICAST_ADDRESS = "226.1.1.3";
/**
* The address to use for binding the local socket for receiving multicast. Defaults to 0.0.0.0.
* @see HBASE-9961
*/
public static final String STATUS_MULTICAST_BIND_ADDRESS =
"hbase.status.multicast.bind.address.ip";
public static final String DEFAULT_STATUS_MULTICAST_BIND_ADDRESS = "0.0.0.0";
/**
* The port to use for the multicast messages.
*/
public static final String STATUS_MULTICAST_PORT = "hbase.status.multicast.address.port";
public static final int DEFAULT_STATUS_MULTICAST_PORT = 16100;
/**
* The network interface name to use for the multicast messages.
*/
public static final String STATUS_MULTICAST_NI_NAME = "hbase.status.multicast.ni.name";
/**
* The address to use for binding the local socket for sending multicast. Defaults to 0.0.0.0.
*/
public static final String STATUS_MULTICAST_PUBLISHER_BIND_ADDRESS =
"hbase.status.multicast.publisher.bind.address.ip";
public static final String DEFAULT_STATUS_MULTICAST_PUBLISHER_BIND_ADDRESS = "0.0.0.0";
public static final long NO_NONCE = 0;
/** Default cipher for encryption */
public static final String CIPHER_AES = "AES";
/** Configuration key for the crypto algorithm provider, a class name */
public static final String CRYPTO_CIPHERPROVIDER_CONF_KEY = "hbase.crypto.cipherprovider";
/** Configuration key for the crypto key provider, a class name */
public static final String CRYPTO_KEYPROVIDER_CONF_KEY = "hbase.crypto.keyprovider";
/** Configuration key for the crypto key provider parameters */
public static final String CRYPTO_KEYPROVIDER_PARAMETERS_KEY =
"hbase.crypto.keyprovider.parameters";
/** Configuration key for the name of the master key for the cluster, a string */
public static final String CRYPTO_MASTERKEY_NAME_CONF_KEY = "hbase.crypto.master.key.name";
/** Configuration key for the name of the alternate master key for the cluster, a string */
public static final String CRYPTO_MASTERKEY_ALTERNATE_NAME_CONF_KEY =
"hbase.crypto.master.alternate.key.name";
/** Configuration key for the algorithm to use when encrypting the WAL, a string */
public static final String CRYPTO_WAL_ALGORITHM_CONF_KEY = "hbase.crypto.wal.algorithm";
/** Configuration key for the name of the master WAL encryption key for the cluster, a string */
public static final String CRYPTO_WAL_KEY_NAME_CONF_KEY = "hbase.crypto.wal.key.name";
/** Configuration key for the algorithm used for creating jks key, a string */
public static final String CRYPTO_KEY_ALGORITHM_CONF_KEY = "hbase.crypto.key.algorithm";
/** Configuration key for the name of the alternate cipher algorithm for the cluster, a string */
public static final String CRYPTO_ALTERNATE_KEY_ALGORITHM_CONF_KEY =
"hbase.crypto.alternate.key.algorithm";
/** Configuration key for enabling WAL encryption, a boolean */
public static final String ENABLE_WAL_ENCRYPTION = "hbase.regionserver.wal.encryption";
/** Configuration key for setting RPC codec class name */
public static final String RPC_CODEC_CONF_KEY = "hbase.client.rpc.codec";
/** Configuration key for setting replication codec class name */
public static final String REPLICATION_CODEC_CONF_KEY = "hbase.replication.rpc.codec";
/** Maximum number of threads used by the replication source for shipping edits to the sinks */
public static final String REPLICATION_SOURCE_MAXTHREADS_KEY =
"hbase.replication.source.maxthreads";
/**
* Drop edits for tables that been deleted from the replication source and target
* @deprecated since 3.0.0. Will be removed in 4.0.0. Moved it into
* HBaseInterClusterReplicationEndpoint.
* @see HBASE-24359
*/
@Deprecated
public static final String REPLICATION_DROP_ON_DELETED_TABLE_KEY =
"hbase.replication.drop.on.deleted.table";
/** Maximum number of threads used by the replication source for shipping edits to the sinks */
public static final int REPLICATION_SOURCE_MAXTHREADS_DEFAULT = 10;
/** Configuration key for SplitLog manager timeout */
public static final String HBASE_SPLITLOG_MANAGER_TIMEOUT = "hbase.splitlog.manager.timeout";
/**
* Configuration keys for Bucket cache
*/
// TODO moving these bucket cache implementation specific configs to this level is violation of
// encapsulation. But as these has to be referred from hbase-common and bucket cache
// sits in hbase-server, there were no other go! Can we move the cache implementation to
// hbase-common?
/**
* Current ioengine options in include: heap, offheap and file:PATH (where PATH is the path to the
* file that will host the file-based cache. See BucketCache#getIOEngineFromName() for list of
* supported ioengine options.
*
* Set this option and a non-zero {@link #BUCKET_CACHE_SIZE_KEY} to enable bucket cache.
*/
public static final String BUCKET_CACHE_IOENGINE_KEY = "hbase.bucketcache.ioengine";
/**
* When using bucket cache, it is the capacity in megabytes of the cache.
*/
public static final String BUCKET_CACHE_SIZE_KEY = "hbase.bucketcache.size";
/**
* HConstants for fast fail on the client side follow
*/
/**
* Config for enabling/disabling the fast fail mode.
* @deprecated since 2.3.0, and in 3.0.0 the actually implementation will be removed so config
* this value will have no effect. The constants itself will be removed in 4.0.0.
*/
@Deprecated
public static final String HBASE_CLIENT_FAST_FAIL_MODE_ENABLED =
"hbase.client.fast.fail.mode.enabled";
/**
* @deprecated since 2.3.0, and in 3.0.0 the actually implementation will be removed so config
* this value will have no effect. The constants itself will be removed in 4.0.0.
*/
@Deprecated
public static final boolean HBASE_CLIENT_ENABLE_FAST_FAIL_MODE_DEFAULT = false;
/**
* @deprecated since 2.3.0, and in 3.0.0 the actually implementation will be removed so config
* this value will have no effect. The constants itself will be removed in 4.0.0.
*/
@Deprecated
public static final String HBASE_CLIENT_FAST_FAIL_THREASHOLD_MS =
"hbase.client.fastfail.threshold";
/**
* @deprecated since 2.3.0, and in 3.0.0 the actually implementation will be removed so config
* this value will have no effect. The constants itself will be removed in 4.0.0.
*/
@Deprecated
public static final long HBASE_CLIENT_FAST_FAIL_THREASHOLD_MS_DEFAULT = 60000;
/**
* @deprecated since 2.3.0, and in 3.0.0 the actually implementation will be removed so config
* this value will have no effect. The constants itself will be removed in 4.0.0.
*/
@Deprecated
public static final String HBASE_CLIENT_FAILURE_MAP_CLEANUP_INTERVAL_MS =
"hbase.client.failure.map.cleanup.interval";
/**
* @deprecated since 2.3.0, and in 3.0.0 the actually implementation will be removed so config
* this value will have no effect. The constants itself will be removed in 4.0.0.
*/
@Deprecated
public static final long HBASE_CLIENT_FAILURE_MAP_CLEANUP_INTERVAL_MS_DEFAULT = 600000;
/**
* @deprecated since 2.3.0, and in 3.0.0 the actually implementation will be removed so config
* this value will have no effect. The constants itself will be removed in 4.0.0.
*/
@Deprecated
public static final String HBASE_CLIENT_FAST_FAIL_CLEANUP_MS_DURATION_MS =
"hbase.client.fast.fail.cleanup.duration";
/**
* @deprecated since 2.3.0, and in 3.0.0 the actually implementation will be removed so config
* this value will have no effect. The constants itself will be removed in 4.0.0.
*/
@Deprecated
public static final long HBASE_CLIENT_FAST_FAIL_CLEANUP_DURATION_MS_DEFAULT = 600000;
/**
* @deprecated since 2.3.0, and in 3.0.0 the actually implementation will be removed so config
* this value will have no effect. The constants itself will be removed in 4.0.0.
*/
@Deprecated
public static final String HBASE_CLIENT_FAST_FAIL_INTERCEPTOR_IMPL =
"hbase.client.fast.fail.interceptor.impl";
/**
* @deprecated since 2.4.0 and in 3.0.0, to be removed in 4.0.0, replaced by procedure-based
* distributed WAL splitter; see SplitWALManager.
*/
@Deprecated
public static final String HBASE_SPLIT_WAL_COORDINATED_BY_ZK = "hbase.split.wal.zk.coordinated";
/**
* @deprecated since 2.4.0 and in 3.0.0, to be removed in 4.0.0.
*/
@Deprecated
public static final boolean DEFAULT_HBASE_SPLIT_COORDINATED_BY_ZK = false;
public static final String HBASE_SPLIT_WAL_MAX_SPLITTER = "hbase.regionserver.wal.max.splitters";
public static final int DEFAULT_HBASE_SPLIT_WAL_MAX_SPLITTER = 2;
/**
* Config key for if the server should send backpressure and if the client should listen to that
* backpressure from the server
*/
public static final String ENABLE_CLIENT_BACKPRESSURE = "hbase.client.backpressure.enabled";
public static final boolean DEFAULT_ENABLE_CLIENT_BACKPRESSURE = false;
public static final String HEAP_OCCUPANCY_LOW_WATERMARK_KEY =
"hbase.heap.occupancy.low_water_mark";
public static final float DEFAULT_HEAP_OCCUPANCY_LOW_WATERMARK = 0.95f;
public static final String HEAP_OCCUPANCY_HIGH_WATERMARK_KEY =
"hbase.heap.occupancy.high_water_mark";
public static final float DEFAULT_HEAP_OCCUPANCY_HIGH_WATERMARK = 0.98f;
/**
* The max number of threads used for splitting storefiles in parallel during the region split
* process.
*/
public static final String REGION_SPLIT_THREADS_MAX =
"hbase.regionserver.region.split.threads.max";
/** Canary config keys */
// TODO: Move these defines to Canary Class
public static final String HBASE_CANARY_WRITE_DATA_TTL_KEY = "hbase.canary.write.data.ttl";
public static final String HBASE_CANARY_WRITE_PERSERVER_REGIONS_LOWERLIMIT_KEY =
"hbase.canary.write.perserver.regions.lowerLimit";
public static final String HBASE_CANARY_WRITE_PERSERVER_REGIONS_UPPERLIMIT_KEY =
"hbase.canary.write.perserver.regions.upperLimit";
public static final String HBASE_CANARY_WRITE_VALUE_SIZE_KEY = "hbase.canary.write.value.size";
public static final String HBASE_CANARY_WRITE_TABLE_CHECK_PERIOD_KEY =
"hbase.canary.write.table.check.period";
public static final String HBASE_CANARY_READ_RAW_SCAN_KEY = "hbase.canary.read.raw.enabled";
public static final String HBASE_CANARY_READ_ALL_CF = "hbase.canary.read.all.column.famliy";
/**
* Configuration keys for programmatic JAAS configuration for secured ZK interaction
*/
public static final String ZK_CLIENT_KEYTAB_FILE = "hbase.zookeeper.client.keytab.file";
public static final String ZK_CLIENT_KERBEROS_PRINCIPAL =
"hbase.zookeeper.client.kerberos.principal";
public static final String ZK_SERVER_KEYTAB_FILE = "hbase.zookeeper.server.keytab.file";
public static final String ZK_SERVER_KERBEROS_PRINCIPAL =
"hbase.zookeeper.server.kerberos.principal";
/** Config key for hbase temporary directory in hdfs */
public static final String TEMPORARY_FS_DIRECTORY_KEY = "hbase.fs.tmp.dir";
/**
* Don't use it! This'll get you the wrong path in a secure cluster. Use
* FileSystem.getHomeDirectory() or "/user/" +
* UserGroupInformation.getCurrentUser().getShortUserName()
*/
public static final String DEFAULT_TEMPORARY_HDFS_DIRECTORY =
"/user/" + System.getProperty("user.name") + "/hbase-staging";
public static final String SNAPSHOT_RESTORE_TAKE_FAILSAFE_SNAPSHOT =
"hbase.snapshot.restore.take.failsafe.snapshot";
public static final boolean DEFAULT_SNAPSHOT_RESTORE_TAKE_FAILSAFE_SNAPSHOT = true;
public static final String SNAPSHOT_RESTORE_FAILSAFE_NAME =
"hbase.snapshot.restore.failsafe.name";
public static final String DEFAULT_SNAPSHOT_RESTORE_FAILSAFE_NAME =
"hbase-failsafe-{snapshot.name}-{restore.timestamp}";
public static final String DEFAULT_LOSSY_COUNTING_ERROR_RATE =
"hbase.util.default.lossycounting.errorrate";
public static final String NOT_IMPLEMENTED = "Not implemented";
// Default TTL - FOREVER
public static final long DEFAULT_SNAPSHOT_TTL = 0;
// User defined Default TTL config key
public static final String DEFAULT_SNAPSHOT_TTL_CONFIG_KEY = "hbase.master.snapshot.ttl";
// Regions Recovery based on high storeFileRefCount threshold value
public static final String STORE_FILE_REF_COUNT_THRESHOLD =
"hbase.regions.recovery.store.file.ref.count";
// default -1 indicates there is no threshold on high storeRefCount
public static final int DEFAULT_STORE_FILE_REF_COUNT_THRESHOLD = -1;
public static final String REGIONS_RECOVERY_INTERVAL =
"hbase.master.regions.recovery.check.interval";
public static final int DEFAULT_REGIONS_RECOVERY_INTERVAL = 1200 * 1000; // Default 20 min
/**
* Configurations for master executor services.
*/
public static final String MASTER_OPEN_REGION_THREADS =
"hbase.master.executor.openregion.threads";
public static final int MASTER_OPEN_REGION_THREADS_DEFAULT = 5;
public static final String MASTER_CLOSE_REGION_THREADS =
"hbase.master.executor.closeregion.threads";
public static final int MASTER_CLOSE_REGION_THREADS_DEFAULT = 5;
public static final String MASTER_SERVER_OPERATIONS_THREADS =
"hbase.master.executor.serverops.threads";
public static final int MASTER_SERVER_OPERATIONS_THREADS_DEFAULT = 5;
/**
* Number of threads used to dispatch merge operations to the regionservers.
*/
public static final String MASTER_MERGE_DISPATCH_THREADS =
"hbase.master.executor.merge.dispatch.threads";
public static final int MASTER_MERGE_DISPATCH_THREADS_DEFAULT = 2;
public static final String MASTER_META_SERVER_OPERATIONS_THREADS =
"hbase.master.executor.meta.serverops.threads";
public static final int MASTER_META_SERVER_OPERATIONS_THREADS_DEFAULT = 5;
public static final String MASTER_LOG_REPLAY_OPS_THREADS =
"hbase.master.executor.logreplayops.threads";
public static final int MASTER_LOG_REPLAY_OPS_THREADS_DEFAULT = 10;
public static final int DEFAULT_SLOW_LOG_RING_BUFFER_SIZE = 256;
public static final String SLOW_LOG_BUFFER_ENABLED_KEY =
"hbase.regionserver.slowlog.buffer.enabled";
public static final boolean DEFAULT_ONLINE_LOG_PROVIDER_ENABLED = false;
/** The slowlog info family as a string */
private static final String SLOWLOG_INFO_FAMILY_STR = "info";
/** The slowlog info family */
public static final byte[] SLOWLOG_INFO_FAMILY = Bytes.toBytes(SLOWLOG_INFO_FAMILY_STR);
public static final String SLOW_LOG_SYS_TABLE_ENABLED_KEY =
"hbase.regionserver.slowlog.systable.enabled";
public static final boolean DEFAULT_SLOW_LOG_SYS_TABLE_ENABLED_KEY = false;
@Deprecated
// since and will be removed in
// Instead use hbase.regionserver.named.queue.chore.duration config property
public static final String SLOW_LOG_SYS_TABLE_CHORE_DURATION_KEY =
"hbase.slowlog.systable.chore.duration";
// Default 10 mins.
public static final int DEFAULT_SLOW_LOG_SYS_TABLE_CHORE_DURATION = 10 * 60 * 1000;
public static final String SLOW_LOG_SCAN_PAYLOAD_ENABLED = "hbase.slowlog.scan.payload.enabled";
public static final boolean SLOW_LOG_SCAN_PAYLOAD_ENABLED_DEFAULT = false;
public static final String SHELL_TIMESTAMP_FORMAT_EPOCH_KEY =
"hbase.shell.timestamp.format.epoch";
public static final boolean DEFAULT_SHELL_TIMESTAMP_FORMAT_EPOCH = false;
/**
* Number of rows in a batch operation above which a warning will be logged.
*/
public static final String BATCH_ROWS_THRESHOLD_NAME = "hbase.rpc.rows.warning.threshold";
/**
* Default value of {@link #BATCH_ROWS_THRESHOLD_NAME}
*/
public static final int BATCH_ROWS_THRESHOLD_DEFAULT = 5000;
/**
* In some scenarios, such as the elastic scaling scenario on the cloud, the HBase client may not
* be able to resolve the hostname of the newly added node. If the network is interconnected, the
* client can actually access the HBase cluster nodes through ip. However, since the HBase client
* obtains the Master/RS address info from or the ZK or the meta table, so the Master/RS of the
* HBase cluster needs to expose the service with ip instead of the hostname. Therefore, We can
* use hostname by default, but at the same time, we can also provide a config to support whether
* to use ip for Master/RS service. See HBASE-27304 for details.
*/
public final static String HBASE_SERVER_USEIP_ENABLED_KEY = "hbase.server.useip.enabled";
/**
* Default value of {@link #HBASE_SERVER_USEIP_ENABLED_KEY}
*/
public final static boolean HBASE_SERVER_USEIP_ENABLED_DEFAULT = false;
private HConstants() {
// Can't be instantiated with this ctor.
}
}