HConstants (HBase - Common 0.98.13-hadoop2 API)

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org.apache.hadoop.hbase
Class HConstants

java.lang.Object
  org.apache.hadoop.hbase.HConstants

@InterfaceAudience.Public @InterfaceStability.Stable public final class HConstants
extends Object
extends Object

HConstants holds a bunch of HBase-related constants

Nested Class Summary
`static class`	`HConstants.Modify` modifyTable op for replacing the table descriptor
`static class`	`HConstants.OperationStatusCode` Status codes used for return values of bulk operations.

Field Summary
`static int`	`ALL_VERSIONS` Define for 'return-all-versions'.
`static String`	`BASE_NAMESPACE_DIR`
`static String`	`BYTES_PER_CHECKSUM` The name of the configuration parameter that specifies the number of bytes in a newly created checksum chunk.
`static byte[]`	`CATALOG_FAMILY` The catalog family
`static String`	`CATALOG_FAMILY_STR` The catalog family as a string
`static String`	`CHECKSUM_TYPE_NAME` The name of the configuration parameter that specifies the name of an algorithm that is used to compute checksums for newly created blocks.
`static String`	`CIPHER_AES` Default cipher for encryption
`static String`	`CLIENT_PORT_STR` The ZK client port key in the ZK properties map.
`static String`	`CLUSTER_DISTRIBUTED` Cluster is in distributed mode or not
`static String`	`CLUSTER_ID_DEFAULT` Default value for cluster ID
`static String`	`CLUSTER_ID_FILE_NAME` name of the file for unique cluster ID
`static boolean`	`CLUSTER_IS_DISTRIBUTED` Cluster is fully-distributed
`static boolean`	`CLUSTER_IS_LOCAL` Cluster is standalone or pseudo-distributed
`static String`	`COMPACTION_KV_MAX` Parameter name for the maximum batch of KVs to be used in flushes and compactions
`static int`	`COMPACTION_KV_MAX_DEFAULT`
`static String`	`CONFIGURATION`
`static String`	`CORRUPT_DIR_NAME`
`static Pattern`	`CP_HTD_ATTR_KEY_PATTERN`
`static String`	`CP_HTD_ATTR_VALUE_PARAM_KEY_PATTERN`
`static Pattern`	`CP_HTD_ATTR_VALUE_PARAM_PATTERN`
`static String`	`CP_HTD_ATTR_VALUE_PARAM_VALUE_PATTERN`
`static Pattern`	`CP_HTD_ATTR_VALUE_PATTERN`
`static String`	`CRYPTO_ALTERNATE_KEY_ALGORITHM_CONF_KEY` Configuration key for the name of the alternate cipher algorithm for the cluster, a string
`static String`	`CRYPTO_CIPHERPROVIDER_CONF_KEY` Configuration key for the crypto algorithm provider, a class name
`static String`	`CRYPTO_KEY_ALGORITHM_CONF_KEY` Configuration key for the algorithm used for creating jks key, a string
`static String`	`CRYPTO_KEYPROVIDER_CONF_KEY` Configuration key for the crypto key provider, a class name
`static String`	`CRYPTO_KEYPROVIDER_PARAMETERS_KEY` Configuration key for the crypto key provider parameters
`static String`	`CRYPTO_MASTERKEY_ALTERNATE_NAME_CONF_KEY` Configuration key for the name of the alternate master key for the cluster, a string
`static String`	`CRYPTO_MASTERKEY_NAME_CONF_KEY` Configuration key for the name of the master key for the cluster, a string
`static String`	`CRYPTO_WAL_ALGORITHM_CONF_KEY` Configuration key for the algorithm to use when encrypting the WAL, a string
`static String`	`CRYPTO_WAL_KEY_NAME_CONF_KEY` Configuration key for the name of the master WAL encryption key for the cluster, a string
`static String`	`DATA_FILE_UMASK_KEY` File permission umask to use when creating hbase data files
`static int`	`DAY_IN_SECONDS` Seconds in a day, hour and minute
`static int`	`DEFAULT_BLOCKSIZE` Default block size for an HFile.
`static boolean`	`DEFAULT_CLUSTER_DISTRIBUTED` Default value for cluster distributed mode
`static UUID`	`DEFAULT_CLUSTER_ID` Default cluster ID, cannot be used to identify a cluster so a key with this value means it wasn't meant for replication.
`static boolean`	`DEFAULT_DISALLOW_WRITES_IN_RECOVERING_CONFIG`
`static boolean`	`DEFAULT_DISTRIBUTED_LOG_REPLAY_CONFIG`
`static boolean`	`DEFAULT_ENABLE_CLIENT_BACKPRESSURE`
`static int`	`DEFAULT_HBASE_CLIENT_MAX_PERREGION_TASKS` Default value of `HBASE_CLIENT_MAX_PERREGION_TASKS`.
`static int`	`DEFAULT_HBASE_CLIENT_MAX_PERSERVER_TASKS` Default value of `HBASE_CLIENT_MAX_PERSERVER_TASKS`.
`static int`	`DEFAULT_HBASE_CLIENT_MAX_TOTAL_TASKS` Default value of `HBASE_CLIENT_MAX_TOTAL_TASKS`.
`static int`	`DEFAULT_HBASE_CLIENT_OPERATION_TIMEOUT` Default HBase client operation timeout, which is tantamount to a blocking call
`static long`	`DEFAULT_HBASE_CLIENT_PAUSE` Default value of `HBASE_CLIENT_PAUSE`.
`static boolean`	`DEFAULT_HBASE_CLIENT_PREFETCH` Default value of `HBASE_CLIENT_PREFETCH`.
`static int`	`DEFAULT_HBASE_CLIENT_PREFETCH_LIMIT` Default value of `HBASE_CLIENT_PREFETCH_LIMIT`.
`static int`	`DEFAULT_HBASE_CLIENT_RETRIES_NUMBER` Default value of `HBASE_CLIENT_RETRIES_NUMBER`.
`static int`	`DEFAULT_HBASE_CLIENT_SCANNER_CACHING` Default value for `HBASE_CLIENT_SCANNER_CACHING`
`static long`	`DEFAULT_HBASE_CLIENT_SCANNER_MAX_RESULT_SIZE` Maximum number of bytes returned when calling a scanner's next method.
`static int`	`DEFAULT_HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD` Default value of `HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD`.
`static boolean`	`DEFAULT_HBASE_CONFIG_READ_ZOOKEEPER_CONFIG`
`static int`	`DEFAULT_HBASE_META_BLOCK_SIZE` Default value of `HBASE_META_BLOCK_SIZE`.
`static int`	`DEFAULT_HBASE_META_SCANNER_CACHING` Default value of `HBASE_META_SCANNER_CACHING`.
`static int`	`DEFAULT_HBASE_META_VERSIONS` Default value of `HBASE_META_VERSIONS`.
`static int`	`DEFAULT_HBASE_RPC_SHORTOPERATION_TIMEOUT` Default value of `HBASE_RPC_SHORTOPERATION_TIMEOUT_KEY`
`static int`	`DEFAULT_HBASE_RPC_TIMEOUT` Default value of `HBASE_RPC_TIMEOUT_KEY`
`static int`	`DEFAULT_HBASE_SERVER_PAUSE` Default value of `HBASE_SERVER_PAUSE`.
`static long`	`DEFAULT_HBASE_SERVER_SCANNER_MAX_RESULT_SIZE` Maximum number of bytes returned when calling a scanner's next method.
`static int`	`DEFAULT_HEALTH_FAILURE_THRESHOLD`
`static long`	`DEFAULT_HEALTH_SCRIPT_TIMEOUT`
`static float`	`DEFAULT_HEAP_OCCUPANCY_HIGH_WATERMARK`
`static float`	`DEFAULT_HEAP_OCCUPANCY_LOW_WATERMARK`
`static String`	`DEFAULT_HOST` default host address
`static boolean`	`DEFAULT_HREGION_EDITS_REPLAY_SKIP_ERRORS`
`static int`	`DEFAULT_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
`static int`	`DEFAULT_MASTER_HANLDER_COUNT`
`static int`	`DEFAULT_MASTER_INFOPORT` default port for master web api
`static int`	`DEFAULT_MASTER_PORT` default port that the master listens on
`static boolean`	`DEFAULT_MASTER_TYPE_BACKUP` by default every master is a possible primary master unless the conf explicitly overrides it
`static long`	`DEFAULT_MAX_FILE_SIZE` Default maximum file size
`static float`	`DEFAULT_REGION_SERVER_HANDLER_ABORT_ON_ERROR_PERCENT`
`static int`	`DEFAULT_REGION_SERVER_HANDLER_COUNT`
`static int`	`DEFAULT_REGION_SERVER_META_HANDLER_COUNT`
`static int`	`DEFAULT_REGION_SERVER_REPLICATION_HANDLER_COUNT`
`static int`	`DEFAULT_REGIONSERVER_INFOPORT` default port for region server web api
`static long`	`DEFAULT_REGIONSERVER_METRICS_PERIOD`
`static int`	`DEFAULT_REGIONSERVER_PORT` Default port region server listens on.
`static String`	`DEFAULT_STATUS_MULTICAST_ADDRESS`
`static String`	`DEFAULT_STATUS_MULTICAST_BIND_ADDRESS`
`static int`	`DEFAULT_STATUS_MULTICAST_PORT`
`static int`	`DEFAULT_THREAD_WAKE_FREQUENCY` Default value for thread wake frequency
`static int`	`DEFAULT_VERSION_FILE_WRITE_ATTEMPTS` Parameter name for how often we should try to write a version file, before failing
`static int`	`DEFAULT_ZK_SESSION_TIMEOUT` Default value for ZooKeeper session timeout
`static String`	`DEFAULT_ZOOKEEPER_ZNODE_PARENT`
`static int`	`DEFAULT_ZOOKEPER_CLIENT_PORT` Default client port that the zookeeper listens on
`static int`	`DEFAULT_ZOOKEPER_MAX_CLIENT_CNXNS` Default limit on concurrent client-side zookeeper connections
`static long`	`DEFAULT_ZOOKEPER_RECOVERABLE_WAITIME` Default wait time for the recoverable zookeeper
`static int`	`DELIMITER` delimiter used between portions of a region name
`static String`	`DISALLOW_WRITES_IN_RECOVERING`
`static String`	`DISTRIBUTED_LOG_REPLAY_KEY` Conf key that enables unflushed WAL edits directly being replayed to region servers
`static byte[]`	`EMPTY_BYTE_ARRAY` An empty instance.
`static byte[]`	`EMPTY_END_ROW` Last row in a table.
`static byte[]`	`EMPTY_START_ROW` Used by scanners, etc when they want to start at the beginning of a region
`static String`	`ENABLE_CLIENT_BACKPRESSURE` Config key for if the server should send backpressure and if the client should listen to that backpressure from the server
`static String`	`ENABLE_DATA_FILE_UMASK` Enable file permission modification from standard hbase
`static String`	`ENABLE_WAL_COMPRESSION` Configuration name of HLog Compression
`static String`	`ENABLE_WAL_ENCRYPTION` Configuration key for enabling WAL encryption, a boolean
`static String`	`FILE_SYSTEM_VERSION` Current version of file system.
`static int`	`FOREVER` Unlimited time-to-live.
`static String`	`HBASE_CHECKSUM_VERIFICATION` If this parameter is set to true, then hbase will read data and then verify checksums.
`static String`	`HBASE_CLIENT_INSTANCE_ID` Parameter name for unique identifier for this `Configuration` instance.
`static String`	`HBASE_CLIENT_IPC_POOL_SIZE` Parameter name for HBase client IPC pool size
`static String`	`HBASE_CLIENT_IPC_POOL_TYPE` Parameter name for HBase client IPC pool type
`static String`	`HBASE_CLIENT_MAX_PERREGION_TASKS` The maximum number of concurrent connections the client will maintain to a single Region.
`static String`	`HBASE_CLIENT_MAX_PERSERVER_TASKS` The maximum number of concurrent connections the client will maintain to a single RegionServer.
`static String`	`HBASE_CLIENT_MAX_TOTAL_TASKS` The maximum number of concurrent connections the client will maintain.
`static String`	`HBASE_CLIENT_META_OPERATION_TIMEOUT` Parameter name for HBase client operation timeout, which overrides RPC timeout
`static String`	`HBASE_CLIENT_OPERATION_TIMEOUT` Parameter name for HBase client operation timeout, which overrides RPC timeout
`static String`	`HBASE_CLIENT_PAUSE` Parameter name for client pause value, used mostly as value to wait before running a retry of a failed get, region lookup, etc.
`static String`	`HBASE_CLIENT_PREFETCH` Parameter name for client region location prefetch toggle.
`static String`	`HBASE_CLIENT_PREFETCH_LIMIT` Parameter name for client prefetch limit, used as the maximum number of regions info that will be prefetched.
`static String`	`HBASE_CLIENT_RETRIES_NUMBER` 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.
`static String`	`HBASE_CLIENT_SCANNER_CACHING` Parameter name to set the default scanner caching for all clients.
`static String`	`HBASE_CLIENT_SCANNER_MAX_RESULT_SIZE_KEY` Parameter name for maximum number of bytes returned when calling a scanner's next method.
`static String`	`HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD` The client scanner timeout period in milliseconds.
`static float`	`HBASE_CLUSTER_MINIMUM_MEMORY_THRESHOLD`
`static String`	`HBASE_CONFIG_READ_ZOOKEEPER_CONFIG`
`static String`	`HBASE_DIR` Parameter name for HBase instance root directory
`static String`	`HBASE_MASTER_LOADBALANCER_CLASS` Config for pluggable load balancers
`static String`	`HBASE_MASTER_LOGCLEANER_PLUGINS`
`static String`	`HBASE_META_BLOCK_SIZE` Parameter name for number of versions, kept by meta table.
`static String`	`HBASE_META_SCANNER_CACHING` Parameter name for number of rows that will be fetched when calling next on a scanner if it is not served from memory.
`static String`	`HBASE_META_VERSIONS` Parameter name for number of versions, kept by meta table.
`static List<String>`	`HBASE_NON_TABLE_DIRS` Directories that are not HBase table directories
`static List<String>`	`HBASE_NON_USER_TABLE_DIRS` Directories that are not HBase user table directories
`static String`	`HBASE_REGION_SPLIT_POLICY_KEY`
`static String`	`HBASE_REGIONSERVER_LEASE_PERIOD_KEY` Deprecated. This config option is deprecated. Will be removed at later releases after 0.96.
`static String`	`HBASE_RPC_SHORTOPERATION_TIMEOUT_KEY` timeout for short operation RPC
`static String`	`HBASE_RPC_TIMEOUT_KEY` timeout for each RPC
`static String`	`HBASE_RS_NONCES_ENABLED` Whether nonces are enabled; default is true.
`static String`	`HBASE_SERVER_PAUSE` Parameter name for server pause value, used mostly as value to wait before running a retry of a failed operation.
`static String`	`HBASE_SERVER_SCANNER_MAX_RESULT_SIZE_KEY` Parameter name for maximum number of bytes returned when calling a scanner's next method.
`static String`	`HBASE_TEMP_DIRECTORY` Temporary directory used for table creation and deletion
`static String`	`HBASECLIENT_IMPL` Parameter name for what hbase client implementation to use.
`static String`	`HBCK_CODE_NAME` HBCK special code name used as server name when manipulating ZK nodes
`static String`	`HBCK_SIDELINEDIR_NAME` Used by HBCK to sideline backup data
`static String`	`HEALTH_CHORE_WAKE_FREQ`
`static String`	`HEALTH_FAILURE_THRESHOLD` The maximum number of health check failures a server can encounter consecutively.
`static String`	`HEALTH_SCRIPT_LOC` Health script related settings.
`static String`	`HEALTH_SCRIPT_TIMEOUT`
`static String`	`HEAP_OCCUPANCY_HIGH_WATERMARK_KEY`
`static String`	`HEAP_OCCUPANCY_LOW_WATERMARK_KEY`
`static String`	`HFILE_ARCHIVE_DIRECTORY` Directory under /hbase where archived hfiles are stored
`static float`	`HFILE_BLOCK_CACHE_SIZE_DEFAULT`
`static String`	`HFILE_BLOCK_CACHE_SIZE_KEY` Configuration key for the size of the block cache
`static byte[]`	`HFILEBLOCK_DUMMY_HEADER` Just an array of bytes of the right size.
`static int`	`HFILEBLOCK_HEADER_SIZE` The size of a version 2 HFile block header, minor version 1.
`static int`	`HFILEBLOCK_HEADER_SIZE_NO_CHECKSUM` The size data structures with minor version is 0
`static int`	`HIGH_QOS`
`static int`	`HOUR_IN_SECONDS`
`static String`	`HREGION_COMPACTIONDIR_NAME` Used to construct the name of the compaction directory during compaction
`static String`	`HREGION_EDITS_REPLAY_SKIP_ERRORS`
`static String`	`HREGION_LOGDIR_NAME` Used to construct the name of the log directory for a region server
`static String`	`HREGION_MAX_FILESIZE` Conf key for the max file size after which we split the region
`static String`	`HREGION_MEMSTORE_FLUSH_SIZE` Conf key for the memstore size at which we flush the memstore
`static String`	`HREGION_OLDLOGDIR_NAME` Like the previous, but for old logs that are about to be deleted
`static String`	`HSTORE_OPEN_AND_CLOSE_THREADS_MAX` The max number of threads used for opening and closing stores or store files in parallel
`static String`	`IN_MEMORY`
`static int`	`INDEX_KEY_MAGIC` Used as a magic return value while optimized index key feature enabled(HBASE-7845)
`static String`	`KEY_FOR_HOSTNAME_SEEN_BY_MASTER`
`static byte[]`	`LAST_ROW` Used by scanners and others when they're trying to detect the end of a table
`static long`	`LATEST_TIMESTAMP` Timestamp to use when we want to refer to the latest cell.
`static byte[]`	`LATEST_TIMESTAMP_BYTES` LATEST_TIMESTAMP in bytes form
`static String`	`LIB_DIR` The directory from which co-processor/custom filter jars can be loaded dynamically by the region servers.
`static String`	`LOAD_BALANCER_SLOP_KEY`
`static String`	`LOCALHOST` Host name of the local machine
`static String`	`LOCALHOST_IP`
`static String`	`LOG_REPLAY_WAIT_REGION_TIMEOUT` Conf key that specifies timeout value to wait for a region ready
`static String`	`MAJOR_COMPACTION_PERIOD` Parameter name for how often a region should should perform a major compaction
`static String`	`MASTER_HANDLER_COUNT`
`static String`	`MASTER_IMPL` Parameter name for what master implementation to use.
`static String`	`MASTER_INFO_PORT` Configuration key for master web API port
`static String`	`MASTER_PORT` Parameter name for port master listens on.
`static String`	`MASTER_TYPE_BACKUP` Parameter name for the master type being backup (waits for primary to go inactive).
`static int`	`MAX_ROW_LENGTH` Max length a row can have because of the limitation in TFile.
`static int`	`MAXIMUM_VALUE_LENGTH` Maximum value length, enforced on KeyValue construction
`static byte[]`	`MERGEA_QUALIFIER` The lower-half merge region column qualifier
`static byte[]`	`MERGEB_QUALIFIER` The upper-half merge region column qualifier
`static int`	`META_ROW_DELIMITER` delimiter used between portions of a region name
`static byte[]`	`META_TABLE_NAME` Deprecated.
`static short`	`META_VERSION` The current version of the meta table.
`static byte[]`	`META_VERSION_QUALIFIER` The meta table version column qualifier.
`static String`	`METADATA`
`static String`	`METRICS_RIT_STUCK_WARNING_THRESHOLD` Region in Transition metrics threshold time
`static String`	`MIGRATION_NAME` Any artifacts left from migration can be moved here
`static int`	`MINUTE_IN_SECONDS`
`static String`	`NAME`
`static String`	`NINES`
`static byte[]`	`NO_NEXT_INDEXED_KEY` The byte array represents for NO_NEXT_INDEXED_KEY; The actual value is irrelevant because this is always compared by reference.
`static long`	`NO_NONCE`
`static long`	`NO_SEQNUM` Value indicating the server name was saved with no sequence number.
`static int`	`NORMAL_QOS` QOS attributes: these attributes are used to demarcate RPC call processing by different set of handlers.
`static String`	`OLD_SNAPSHOT_DIR_NAME`
`static long`	`OLDEST_TIMESTAMP` Timestamp to use when we want to refer to the oldest cell.
`static int`	`QOS_THRESHOLD`
`static String`	`RECOVERED_EDITS_DIR`
`static String`	`REGION_IMPL`
`static String`	`REGION_SERVER_HANDLER_ABORT_ON_ERROR_PERCENT`
`static String`	`REGION_SERVER_HANDLER_COUNT`
`static String`	`REGION_SERVER_IMPL` Parameter name for what region server implementation to use.
`static String`	`REGION_SERVER_META_HANDLER_COUNT`
`static String`	`REGION_SERVER_REPLICATION_HANDLER_COUNT`
`static byte[]`	`REGIONINFO_QUALIFIER` The regioninfo column qualifier
`static String`	`REGIONINFO_QUALIFIER_STR` The RegionInfo qualifier as a string
`static String`	`REGIONSERVER_INFO_PORT` A configuration key for regionserver info port
`static String`	`REGIONSERVER_INFO_PORT_AUTO` A flag that enables automatic selection of regionserver info port
`static String`	`REGIONSERVER_METRICS_PERIOD` The period (in milliseconds) between computing region server point in time metrics
`static String`	`REGIONSERVER_PORT` Parameter name for port region server listens on.
`static int`	`REPLAY_QOS`
`static String`	`REPLICATION_CODEC_CONF_KEY` Configuration key for setting replication codec class name
`static boolean`	`REPLICATION_ENABLE_DEFAULT`
`static String`	`REPLICATION_ENABLE_KEY`
`static int`	`REPLICATION_QOS`
`static int`	`REPLICATION_SCOPE_GLOBAL` Scope tag for globally scoped data.
`static int`	`REPLICATION_SCOPE_LOCAL` Scope tag for locally scoped data.
`static String`	`REPLICATION_SERVICE_CLASSNAME_DEFAULT`
`static String`	`REPLICATION_SINK_SERVICE_CLASSNAME`
`static String`	`REPLICATION_SOURCE_SERVICE_CLASSNAME`
`static int[]`	`RETRY_BACKOFF` Retrying we multiply hbase.client.pause setting by what we have in this array until we run out of array items.
`static String`	`RPC_CODEC_CONF_KEY` Configuration key for setting RPC codec class name
`static byte`	`RPC_CURRENT_VERSION`
`static ByteBuffer`	`RPC_HEADER` The first four bytes of Hadoop RPC connections
`static byte[]`	`SEQNUM_QUALIFIER` The open seqnum column qualifier
`static byte[]`	`SERVER_QUALIFIER` The server column qualifier
`static byte[]`	`SERVERNAME_QUALIFIER` The serverName column qualifier.
`static String`	`SNAPSHOT_DIR_NAME` Name of the directory to store all snapshots.
`static int`	`SOCKET_RETRY_WAIT_MS` The delay when re-trying a socket operation in a loop (HBASE-4712)
`static String`	`SPLIT_LOGDIR_NAME` Used to construct the name of the splitlog directory for a region server
`static byte[]`	`SPLITA_QUALIFIER` The lower-half split region column qualifier
`static byte[]`	`SPLITB_QUALIFIER` The upper-half split region column qualifier
`static byte[]`	`STARTCODE_QUALIFIER` The startcode column qualifier
`static byte[]`	`STATE_QUALIFIER` The state column qualifier
`static String`	`STATUS_MULTICAST_ADDRESS` IP to use for the multicast status messages between the master and the clients.
`static String`	`STATUS_MULTICAST_BIND_ADDRESS` The address to use for binding the local socket for receiving multicast.
`static String`	`STATUS_MULTICAST_PORT` The port to use for the multicast messages.
`static String`	`STATUS_PUBLISHED` Setting to activate, or not, the publication of the status by the master.
`static boolean`	`STATUS_PUBLISHED_DEFAULT`
`static String`	`THREAD_WAKE_FREQUENCY` Parameter name for how often threads should wake up
`static Charset`	`UTF8_CHARSET` When we encode strings, we always specify UTF8 encoding
`static String`	`UTF8_ENCODING` When we encode strings, we always specify UTF8 encoding
`static String`	`VERSION_FILE_NAME` name of version file
`static String`	`VERSION_FILE_WRITE_ATTEMPTS` Parameter name for how often we should try to write a version file, before failing
`static String`	`VERSIONS`
`static int`	`WEEK_IN_SECONDS` Seconds in a week
`static Long`	`ZERO_L` long constant for zero
`static String`	`ZEROES`
`static String`	`ZK_CFG_PROPERTY_PREFIX` Common prefix of ZooKeeper configuration properties
`static int`	`ZK_CFG_PROPERTY_PREFIX_LEN`
`static String`	`ZK_SESSION_TIMEOUT` Configuration key for ZooKeeper session timeout
`static String`	`ZOOKEEPER_CLIENT_PORT` Parameter name for the client port that the zookeeper listens on
`static String`	`ZOOKEEPER_CONFIG_NAME` Name of ZooKeeper config file in conf/ directory.
`static String`	`ZOOKEEPER_DATA_DIR` Parameter name for the ZK data directory
`static String`	`ZOOKEEPER_MAX_CLIENT_CNXNS` Parameter name for the limit on concurrent client-side zookeeper connections
`static String`	`ZOOKEEPER_QUORUM` Name of ZooKeeper quorum configuration parameter.
`static String`	`ZOOKEEPER_RECOVERABLE_WAITTIME` Parameter name for the wait time for the recoverable zookeeper
`static String`	`ZOOKEEPER_TICK_TIME` Parameter name for the ZK tick time
`static String`	`ZOOKEEPER_USEMULTI` Configuration key for whether to use ZK.multi
`static String`	`ZOOKEEPER_ZNODE_PARENT` Parameter name for the root dir in ZK for this cluster

Method Summary

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

UTF8_ENCODING

public static final String UTF8_ENCODING

When we encode strings, we always specify UTF8 encoding

See Also:: Constant Field Values

UTF8_CHARSET

public static final Charset UTF8_CHARSET

When we encode strings, we always specify UTF8 encoding

DEFAULT_BLOCKSIZE

public static final int DEFAULT_BLOCKSIZE

Default block size for an HFile.

See Also:: Constant Field Values

INDEX_KEY_MAGIC

public static final int INDEX_KEY_MAGIC

Used as a magic return value while optimized index key feature enabled(HBASE-7845)

See Also:: Constant Field Values

RECOVERED_EDITS_DIR

public static final String RECOVERED_EDITS_DIR

See Also:: Constant Field Values

RPC_HEADER

public static final ByteBuffer RPC_HEADER

The first four bytes of Hadoop RPC connections

RPC_CURRENT_VERSION

public static final byte RPC_CURRENT_VERSION

See Also:: Constant Field Values

HFILEBLOCK_HEADER_SIZE_NO_CHECKSUM

public static final int HFILEBLOCK_HEADER_SIZE_NO_CHECKSUM

The size data structures with minor version is 0

See Also:: Constant Field Values

HFILEBLOCK_HEADER_SIZE

public static final int HFILEBLOCK_HEADER_SIZE

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.

See Also:: Constant Field Values

HFILEBLOCK_DUMMY_HEADER

public static final byte[] HFILEBLOCK_DUMMY_HEADER

Just an array of bytes of the right size.

ZERO_L

public static final Long ZERO_L

long constant for zero

NINES

public static final String NINES

See Also:: Constant Field Values

ZEROES

public static final String ZEROES

See Also:: Constant Field Values

VERSION_FILE_NAME

public static final String VERSION_FILE_NAME

name of version file

See Also:: Constant Field Values

FILE_SYSTEM_VERSION

public static final String FILE_SYSTEM_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

See Also:: Constant Field Values

CLUSTER_DISTRIBUTED

public static final String CLUSTER_DISTRIBUTED

Cluster is in distributed mode or not

See Also:: Constant Field Values

HBASE_MASTER_LOADBALANCER_CLASS

public static final String HBASE_MASTER_LOADBALANCER_CLASS

Config for pluggable load balancers

See Also:: Constant Field Values

CLUSTER_IS_LOCAL

public static final boolean CLUSTER_IS_LOCAL

Cluster is standalone or pseudo-distributed

See Also:: Constant Field Values

CLUSTER_IS_DISTRIBUTED

public static final boolean CLUSTER_IS_DISTRIBUTED

Cluster is fully-distributed

See Also:: Constant Field Values

DEFAULT_CLUSTER_DISTRIBUTED

public static final boolean DEFAULT_CLUSTER_DISTRIBUTED

Default value for cluster distributed mode

See Also:: Constant Field Values

DEFAULT_HOST

public static final String DEFAULT_HOST

default host address

See Also:: Constant Field Values

MASTER_PORT

public static final String MASTER_PORT

Parameter name for port master listens on.

See Also:: Constant Field Values

DEFAULT_MASTER_PORT

public static final int DEFAULT_MASTER_PORT

default port that the master listens on

See Also:: Constant Field Values

DEFAULT_MASTER_INFOPORT

public static final int DEFAULT_MASTER_INFOPORT

default port for master web api

See Also:: Constant Field Values

MASTER_INFO_PORT

public static final String MASTER_INFO_PORT

Configuration key for master web API port

See Also:: Constant Field Values

MASTER_TYPE_BACKUP

public static final String MASTER_TYPE_BACKUP

Parameter name for the master type being backup (waits for primary to go inactive).

See Also:: Constant Field Values

DEFAULT_MASTER_TYPE_BACKUP

public static final boolean DEFAULT_MASTER_TYPE_BACKUP

by default every master is a possible primary master unless the conf explicitly overrides it

See Also:: Constant Field Values

ZOOKEEPER_QUORUM

public static final String ZOOKEEPER_QUORUM

Name of ZooKeeper quorum configuration parameter.

See Also:: Constant Field Values

ZOOKEEPER_CONFIG_NAME

public static final String ZOOKEEPER_CONFIG_NAME

Name of ZooKeeper config file in conf/ directory.

See Also:: Constant Field Values

ZK_CFG_PROPERTY_PREFIX

public static final String ZK_CFG_PROPERTY_PREFIX

Common prefix of ZooKeeper configuration properties

See Also:: Constant Field Values

ZK_CFG_PROPERTY_PREFIX_LEN

public static final int ZK_CFG_PROPERTY_PREFIX_LEN

CLIENT_PORT_STR

public static final String CLIENT_PORT_STR

The ZK client port key in the ZK properties map. The name reflects the fact that this is not an HBase configuration key.

See Also:: Constant Field Values

ZOOKEEPER_CLIENT_PORT

public static final String ZOOKEEPER_CLIENT_PORT

Parameter name for the client port that the zookeeper listens on

See Also:: Constant Field Values

DEFAULT_ZOOKEPER_CLIENT_PORT

public static final int DEFAULT_ZOOKEPER_CLIENT_PORT

Default client port that the zookeeper listens on

See Also:: Constant Field Values

ZOOKEEPER_RECOVERABLE_WAITTIME

public static final String ZOOKEEPER_RECOVERABLE_WAITTIME

Parameter name for the wait time for the recoverable zookeeper

See Also:: Constant Field Values

DEFAULT_ZOOKEPER_RECOVERABLE_WAITIME

public static final long DEFAULT_ZOOKEPER_RECOVERABLE_WAITIME

Default wait time for the recoverable zookeeper

See Also:: Constant Field Values

ZOOKEEPER_ZNODE_PARENT

public static final String ZOOKEEPER_ZNODE_PARENT

Parameter name for the root dir in ZK for this cluster

See Also:: Constant Field Values

DEFAULT_ZOOKEEPER_ZNODE_PARENT

public static final String DEFAULT_ZOOKEEPER_ZNODE_PARENT

See Also:: Constant Field Values

ZOOKEEPER_MAX_CLIENT_CNXNS

public static final String ZOOKEEPER_MAX_CLIENT_CNXNS

Parameter name for the limit on concurrent client-side zookeeper connections

See Also:: Constant Field Values

ZOOKEEPER_DATA_DIR

public static final String ZOOKEEPER_DATA_DIR

Parameter name for the ZK data directory

See Also:: Constant Field Values

ZOOKEEPER_TICK_TIME

public static final String ZOOKEEPER_TICK_TIME

Parameter name for the ZK tick time

See Also:: Constant Field Values

DEFAULT_ZOOKEPER_MAX_CLIENT_CNXNS

public static final int DEFAULT_ZOOKEPER_MAX_CLIENT_CNXNS

Default limit on concurrent client-side zookeeper connections

See Also:: Constant Field Values

ZK_SESSION_TIMEOUT

public static final String ZK_SESSION_TIMEOUT

Configuration key for ZooKeeper session timeout

See Also:: Constant Field Values

DEFAULT_ZK_SESSION_TIMEOUT

public static final int DEFAULT_ZK_SESSION_TIMEOUT

Default value for ZooKeeper session timeout

See Also:: Constant Field Values

ZOOKEEPER_USEMULTI

public static final String ZOOKEEPER_USEMULTI

Configuration key for whether to use ZK.multi

See Also:: Constant Field Values

REGIONSERVER_PORT

public static final String REGIONSERVER_PORT

Parameter name for port region server listens on.

See Also:: Constant Field Values

DEFAULT_REGIONSERVER_PORT

public static final int DEFAULT_REGIONSERVER_PORT

Default port region server listens on.

See Also:: Constant Field Values

DEFAULT_REGIONSERVER_INFOPORT

public static final int DEFAULT_REGIONSERVER_INFOPORT

default port for region server web api

See Also:: Constant Field Values

REGIONSERVER_INFO_PORT

public static final String REGIONSERVER_INFO_PORT

A configuration key for regionserver info port

See Also:: Constant Field Values

REGIONSERVER_INFO_PORT_AUTO

public static final String REGIONSERVER_INFO_PORT_AUTO

A flag that enables automatic selection of regionserver info port

See Also:: Constant Field Values

REGION_SERVER_IMPL

public static final String REGION_SERVER_IMPL

Parameter name for what region server implementation to use.

See Also:: Constant Field Values

MASTER_IMPL

public static final String MASTER_IMPL

Parameter name for what master implementation to use.

See Also:: Constant Field Values

HBASECLIENT_IMPL

public static final String HBASECLIENT_IMPL

Parameter name for what hbase client implementation to use.

See Also:: Constant Field Values

THREAD_WAKE_FREQUENCY

public static final String THREAD_WAKE_FREQUENCY

Parameter name for how often threads should wake up

See Also:: Constant Field Values

DEFAULT_THREAD_WAKE_FREQUENCY

public static final int DEFAULT_THREAD_WAKE_FREQUENCY

Default value for thread wake frequency

See Also:: Constant Field Values

VERSION_FILE_WRITE_ATTEMPTS

public static final String VERSION_FILE_WRITE_ATTEMPTS

Parameter name for how often we should try to write a version file, before failing

See Also:: Constant Field Values

DEFAULT_VERSION_FILE_WRITE_ATTEMPTS

public static final int DEFAULT_VERSION_FILE_WRITE_ATTEMPTS

Parameter name for how often we should try to write a version file, before failing

See Also:: Constant Field Values

MAJOR_COMPACTION_PERIOD

public static final String MAJOR_COMPACTION_PERIOD

Parameter name for how often a region should should perform a major compaction

See Also:: Constant Field Values

COMPACTION_KV_MAX

public static final String COMPACTION_KV_MAX

Parameter name for the maximum batch of KVs to be used in flushes and compactions

See Also:: Constant Field Values

COMPACTION_KV_MAX_DEFAULT

public static final int COMPACTION_KV_MAX_DEFAULT

See Also:: Constant Field Values

HBASE_DIR

public static final String HBASE_DIR

Parameter name for HBase instance root directory

See Also:: Constant Field Values

HBASE_CLIENT_IPC_POOL_TYPE

public static final String HBASE_CLIENT_IPC_POOL_TYPE

Parameter name for HBase client IPC pool type

See Also:: Constant Field Values

HBASE_CLIENT_IPC_POOL_SIZE

public static final String HBASE_CLIENT_IPC_POOL_SIZE

Parameter name for HBase client IPC pool size

See Also:: Constant Field Values

HBASE_CLIENT_OPERATION_TIMEOUT

public static final String HBASE_CLIENT_OPERATION_TIMEOUT

Parameter name for HBase client operation timeout, which overrides RPC timeout

See Also:: Constant Field Values

HBASE_CLIENT_META_OPERATION_TIMEOUT

public static final String HBASE_CLIENT_META_OPERATION_TIMEOUT

Parameter name for HBase client operation timeout, which overrides RPC timeout

See Also:: Constant Field Values

DEFAULT_HBASE_CLIENT_OPERATION_TIMEOUT

public static final int DEFAULT_HBASE_CLIENT_OPERATION_TIMEOUT

Default HBase client operation timeout, which is tantamount to a blocking call

See Also:: Constant Field Values

HREGION_LOGDIR_NAME

public static final String HREGION_LOGDIR_NAME

Used to construct the name of the log directory for a region server

See Also:: Constant Field Values

SPLIT_LOGDIR_NAME

public static final String SPLIT_LOGDIR_NAME

Used to construct the name of the splitlog directory for a region server

See Also:: Constant Field Values

HREGION_OLDLOGDIR_NAME

public static final String HREGION_OLDLOGDIR_NAME

Like the previous, but for old logs that are about to be deleted

See Also:: Constant Field Values

CORRUPT_DIR_NAME

public static final String CORRUPT_DIR_NAME

See Also:: Constant Field Values

HBCK_SIDELINEDIR_NAME

public static final String HBCK_SIDELINEDIR_NAME

Used by HBCK to sideline backup data

See Also:: Constant Field Values

MIGRATION_NAME

public static final String MIGRATION_NAME

Any artifacts left from migration can be moved here

See Also:: Constant Field Values

LIB_DIR

public static final String LIB_DIR

The directory from which co-processor/custom filter jars can be loaded dynamically by the region servers. This value can be overridden by the hbase.dynamic.jars.dir config.

See Also:: Constant Field Values

HREGION_COMPACTIONDIR_NAME

public static final String HREGION_COMPACTIONDIR_NAME

Used to construct the name of the compaction directory during compaction

See Also:: Constant Field Values

HREGION_MAX_FILESIZE

public static final String HREGION_MAX_FILESIZE

Conf key for the max file size after which we split the region

See Also:: Constant Field Values

DEFAULT_MAX_FILE_SIZE

public static final long DEFAULT_MAX_FILE_SIZE

Default maximum file size

See Also:: Constant Field Values

HSTORE_OPEN_AND_CLOSE_THREADS_MAX

public static final String HSTORE_OPEN_AND_CLOSE_THREADS_MAX

The max number of threads used for opening and closing stores or store files in parallel

See Also:: Constant Field Values

DEFAULT_HSTORE_OPEN_AND_CLOSE_THREADS_MAX

public static final int DEFAULT_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

See Also:: Constant Field Values

HREGION_MEMSTORE_FLUSH_SIZE

public static final String HREGION_MEMSTORE_FLUSH_SIZE

Conf key for the memstore size at which we flush the memstore

See Also:: Constant Field Values

HREGION_EDITS_REPLAY_SKIP_ERRORS

public static final String HREGION_EDITS_REPLAY_SKIP_ERRORS

See Also:: Constant Field Values

DEFAULT_HREGION_EDITS_REPLAY_SKIP_ERRORS

public static final boolean DEFAULT_HREGION_EDITS_REPLAY_SKIP_ERRORS

See Also:: Constant Field Values

MAXIMUM_VALUE_LENGTH

public static final int MAXIMUM_VALUE_LENGTH

Maximum value length, enforced on KeyValue construction

See Also:: Constant Field Values

CLUSTER_ID_FILE_NAME

public static final String CLUSTER_ID_FILE_NAME

name of the file for unique cluster ID

See Also:: Constant Field Values

CLUSTER_ID_DEFAULT

public static final String CLUSTER_ID_DEFAULT

Default value for cluster ID

See Also:: Constant Field Values

META_TABLE_NAME

@Deprecated
public static final byte[] META_TABLE_NAME

Deprecated.

The hbase:meta table's name.

BASE_NAMESPACE_DIR

public static final String BASE_NAMESPACE_DIR

See Also:: Constant Field Values

META_ROW_DELIMITER

public static final int META_ROW_DELIMITER

delimiter used between portions of a region name

See Also:: Constant Field Values

CATALOG_FAMILY_STR

public static final String CATALOG_FAMILY_STR

The catalog family as a string

See Also:: Constant Field Values

CATALOG_FAMILY

public static final byte[] CATALOG_FAMILY

The catalog family

REGIONINFO_QUALIFIER_STR

public static final String REGIONINFO_QUALIFIER_STR

The RegionInfo qualifier as a string

See Also:: Constant Field Values

REGIONINFO_QUALIFIER

public static final byte[] REGIONINFO_QUALIFIER

The regioninfo column qualifier

SERVER_QUALIFIER

public static final byte[] SERVER_QUALIFIER

The server column qualifier

STARTCODE_QUALIFIER

public static final byte[] STARTCODE_QUALIFIER

The startcode column qualifier

SEQNUM_QUALIFIER

public static final byte[] SEQNUM_QUALIFIER

The open seqnum column qualifier

STATE_QUALIFIER

public static final byte[] STATE_QUALIFIER

The state column qualifier

SERVERNAME_QUALIFIER

public static final byte[] SERVERNAME_QUALIFIER

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.

SPLITA_QUALIFIER

public static final byte[] SPLITA_QUALIFIER

The lower-half split region column qualifier

SPLITB_QUALIFIER

public static final byte[] SPLITB_QUALIFIER

The upper-half split region column qualifier

MERGEA_QUALIFIER

public static final byte[] MERGEA_QUALIFIER

The lower-half merge region column qualifier

MERGEB_QUALIFIER

public static final byte[] MERGEB_QUALIFIER

The upper-half merge region column qualifier

META_VERSION_QUALIFIER

public static final byte[] META_VERSION_QUALIFIER

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.

META_VERSION

public static final short META_VERSION

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

See Also:: Constant Field Values

EMPTY_BYTE_ARRAY

public static final byte[] EMPTY_BYTE_ARRAY

An empty instance.

EMPTY_START_ROW

public static final byte[] EMPTY_START_ROW

Used by scanners, etc when they want to start at the beginning of a region

EMPTY_END_ROW

public static final byte[] EMPTY_END_ROW

Last row in a table.

LAST_ROW

public static final byte[] LAST_ROW

Used by scanners and others when they're trying to detect the end of a table

MAX_ROW_LENGTH

public static final int MAX_ROW_LENGTH

Max length a row can have because of the limitation in TFile.

See Also:: Constant Field Values

LATEST_TIMESTAMP

public static final long LATEST_TIMESTAMP

Timestamp to use when we want to refer to the latest cell. This is the timestamp sent by clients when no timestamp is specified on commit.

See Also:: Constant Field Values

OLDEST_TIMESTAMP

public static final long OLDEST_TIMESTAMP

Timestamp to use when we want to refer to the oldest cell.

See Also:: Constant Field Values

LATEST_TIMESTAMP_BYTES

public static final byte[] LATEST_TIMESTAMP_BYTES

LATEST_TIMESTAMP in bytes form

ALL_VERSIONS

public static final int ALL_VERSIONS

Define for 'return-all-versions'.

See Also:: Constant Field Values

FOREVER

public static final int FOREVER

Unlimited time-to-live.

See Also:: Constant Field Values

WEEK_IN_SECONDS

public static final int WEEK_IN_SECONDS

Seconds in a week

See Also:: Constant Field Values

DAY_IN_SECONDS

public static final int DAY_IN_SECONDS

Seconds in a day, hour and minute

See Also:: Constant Field Values

HOUR_IN_SECONDS

public static final int HOUR_IN_SECONDS

See Also:: Constant Field Values

MINUTE_IN_SECONDS

public static final int MINUTE_IN_SECONDS

See Also:: Constant Field Values

NAME

public static final String NAME

See Also:: Constant Field Values

VERSIONS

public static final String VERSIONS

See Also:: Constant Field Values

IN_MEMORY

public static final String IN_MEMORY

See Also:: Constant Field Values

METADATA

public static final String METADATA

See Also:: Constant Field Values

CONFIGURATION

public static final String CONFIGURATION

See Also:: Constant Field Values

RETRY_BACKOFF

public static final int[] RETRY_BACKOFF

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

REGION_IMPL

public static final String REGION_IMPL

See Also:: Constant Field Values

REPLICATION_SCOPE_LOCAL

public static final int REPLICATION_SCOPE_LOCAL

Scope tag for locally scoped data. This data will not be replicated.

See Also:: Constant Field Values

REPLICATION_SCOPE_GLOBAL

public static final int REPLICATION_SCOPE_GLOBAL

Scope tag for globally scoped data. This data will be replicated to all peers.

See Also:: Constant Field Values

DEFAULT_CLUSTER_ID

public static final UUID DEFAULT_CLUSTER_ID

Default cluster ID, cannot be used to identify a cluster so a key with this value means it wasn't meant for replication.

HBASE_CLIENT_SCANNER_MAX_RESULT_SIZE_KEY

public static final String HBASE_CLIENT_SCANNER_MAX_RESULT_SIZE_KEY

Parameter name for maximum number of bytes returned when calling a scanner's next method.

See Also:: Constant Field Values

HBASE_SERVER_SCANNER_MAX_RESULT_SIZE_KEY

public static final String HBASE_SERVER_SCANNER_MAX_RESULT_SIZE_KEY

Parameter name for maximum number of bytes returned when calling a scanner's next method. Controlled by the server.

See Also:: Constant Field Values

DEFAULT_HBASE_CLIENT_SCANNER_MAX_RESULT_SIZE

public static final long DEFAULT_HBASE_CLIENT_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.

See Also:: Constant Field Values

DEFAULT_HBASE_SERVER_SCANNER_MAX_RESULT_SIZE

public static final long DEFAULT_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. Safety setting to protect the region server. The default value unlimited for backwards compatibility

See Also:: Constant Field Values

HBASE_CLIENT_PAUSE

public static final String HBASE_CLIENT_PAUSE

Parameter name for client pause value, used mostly as value to wait before running a retry of a failed get, region lookup, etc.

See Also:: Constant Field Values

DEFAULT_HBASE_CLIENT_PAUSE

public static final long DEFAULT_HBASE_CLIENT_PAUSE

Default value of HBASE_CLIENT_PAUSE.

See Also:: Constant Field Values

HBASE_CLIENT_MAX_TOTAL_TASKS

public static final String HBASE_CLIENT_MAX_TOTAL_TASKS

The maximum number of concurrent connections the client will maintain.

See Also:: Constant Field Values

DEFAULT_HBASE_CLIENT_MAX_TOTAL_TASKS

public static final int DEFAULT_HBASE_CLIENT_MAX_TOTAL_TASKS

Default value of HBASE_CLIENT_MAX_TOTAL_TASKS.

See Also:: Constant Field Values

HBASE_CLIENT_MAX_PERSERVER_TASKS

public static final String HBASE_CLIENT_MAX_PERSERVER_TASKS

The maximum number of concurrent connections the client will maintain to a single RegionServer.

See Also:: Constant Field Values

DEFAULT_HBASE_CLIENT_MAX_PERSERVER_TASKS

public static final int DEFAULT_HBASE_CLIENT_MAX_PERSERVER_TASKS

Default value of HBASE_CLIENT_MAX_PERSERVER_TASKS.

See Also:: Constant Field Values

HBASE_CLIENT_MAX_PERREGION_TASKS

public static final String HBASE_CLIENT_MAX_PERREGION_TASKS

The maximum number of concurrent connections the client will maintain to a single Region.

See Also:: Constant Field Values

DEFAULT_HBASE_CLIENT_MAX_PERREGION_TASKS

public static final int DEFAULT_HBASE_CLIENT_MAX_PERREGION_TASKS

Default value of HBASE_CLIENT_MAX_PERREGION_TASKS.

See Also:: Constant Field Values

HBASE_SERVER_PAUSE

public static final String HBASE_SERVER_PAUSE

Parameter name for server pause value, used mostly as value to wait before running a retry of a failed operation.

See Also:: Constant Field Values

DEFAULT_HBASE_SERVER_PAUSE

public static final int DEFAULT_HBASE_SERVER_PAUSE

Default value of HBASE_SERVER_PAUSE.

See Also:: Constant Field Values

HBASE_CLIENT_RETRIES_NUMBER

public static final String HBASE_CLIENT_RETRIES_NUMBER

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.

See Also:: Constant Field Values

DEFAULT_HBASE_CLIENT_RETRIES_NUMBER

public static final int DEFAULT_HBASE_CLIENT_RETRIES_NUMBER

Default value of HBASE_CLIENT_RETRIES_NUMBER.

See Also:: Constant Field Values

HBASE_CLIENT_PREFETCH

public static String HBASE_CLIENT_PREFETCH

Parameter name for client region location prefetch toggle.

DEFAULT_HBASE_CLIENT_PREFETCH

public static boolean DEFAULT_HBASE_CLIENT_PREFETCH

Default value of HBASE_CLIENT_PREFETCH.

HBASE_CLIENT_PREFETCH_LIMIT

public static String HBASE_CLIENT_PREFETCH_LIMIT

Parameter name for client prefetch limit, used as the maximum number of regions info that will be prefetched.

DEFAULT_HBASE_CLIENT_PREFETCH_LIMIT

public static int DEFAULT_HBASE_CLIENT_PREFETCH_LIMIT

Default value of HBASE_CLIENT_PREFETCH_LIMIT.

HBASE_CLIENT_SCANNER_CACHING

public static final String HBASE_CLIENT_SCANNER_CACHING

Parameter name to set the default scanner caching for all clients.

See Also:: Constant Field Values

DEFAULT_HBASE_CLIENT_SCANNER_CACHING

public static final int DEFAULT_HBASE_CLIENT_SCANNER_CACHING

Default value for HBASE_CLIENT_SCANNER_CACHING

See Also:: Constant Field Values

HBASE_META_VERSIONS

public static String HBASE_META_VERSIONS

Parameter name for number of versions, kept by meta table.

DEFAULT_HBASE_META_VERSIONS

public static int DEFAULT_HBASE_META_VERSIONS

Default value of HBASE_META_VERSIONS.

HBASE_META_BLOCK_SIZE

public static String HBASE_META_BLOCK_SIZE

Parameter name for number of versions, kept by meta table.

DEFAULT_HBASE_META_BLOCK_SIZE

public static int DEFAULT_HBASE_META_BLOCK_SIZE

Default value of HBASE_META_BLOCK_SIZE.

HBASE_META_SCANNER_CACHING

public static final String HBASE_META_SCANNER_CACHING

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.

See Also:: Constant Field Values

DEFAULT_HBASE_META_SCANNER_CACHING

public static final int DEFAULT_HBASE_META_SCANNER_CACHING

Default value of HBASE_META_SCANNER_CACHING.

See Also:: Constant Field Values

HBASE_CLIENT_INSTANCE_ID

public static final String HBASE_CLIENT_INSTANCE_ID

Parameter name for unique identifier for this Configuration instance. If there are two or more 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.

See Also:: Constant Field Values

HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD

public static final String HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD

The client scanner timeout period in milliseconds.

See Also:: Constant Field Values

HBASE_REGIONSERVER_LEASE_PERIOD_KEY

@Deprecated
public static final String HBASE_REGIONSERVER_LEASE_PERIOD_KEY

Deprecated. This config option is deprecated. Will be removed at later releases after 0.96.

Use HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD instead.

See Also:: Constant Field Values

DEFAULT_HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD

public static final int DEFAULT_HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD

Default value of HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD.

See Also:: Constant Field Values

HBASE_RPC_TIMEOUT_KEY

public static final String HBASE_RPC_TIMEOUT_KEY

timeout for each RPC

See Also:: Constant Field Values

DEFAULT_HBASE_RPC_TIMEOUT

public static final int DEFAULT_HBASE_RPC_TIMEOUT

Default value of HBASE_RPC_TIMEOUT_KEY

See Also:: Constant Field Values

HBASE_RPC_SHORTOPERATION_TIMEOUT_KEY

public static final String HBASE_RPC_SHORTOPERATION_TIMEOUT_KEY

timeout for short operation RPC

See Also:: Constant Field Values

DEFAULT_HBASE_RPC_SHORTOPERATION_TIMEOUT

public static final int DEFAULT_HBASE_RPC_SHORTOPERATION_TIMEOUT

Default value of HBASE_RPC_SHORTOPERATION_TIMEOUT_KEY

See Also:: Constant Field Values

NO_SEQNUM

public static final long NO_SEQNUM

Value indicating the server name was saved with no sequence number.

See Also:: Constant Field Values

REPLICATION_ENABLE_KEY

public static final String REPLICATION_ENABLE_KEY

See Also:: Constant Field Values

REPLICATION_ENABLE_DEFAULT

public static final boolean REPLICATION_ENABLE_DEFAULT

See Also:: Constant Field Values

REPLICATION_SOURCE_SERVICE_CLASSNAME

public static final String REPLICATION_SOURCE_SERVICE_CLASSNAME

See Also:: Constant Field Values

REPLICATION_SINK_SERVICE_CLASSNAME

public static final String REPLICATION_SINK_SERVICE_CLASSNAME

See Also:: Constant Field Values

REPLICATION_SERVICE_CLASSNAME_DEFAULT

public static final String REPLICATION_SERVICE_CLASSNAME_DEFAULT

See Also:: Constant Field Values

HBCK_CODE_NAME

public static final String HBCK_CODE_NAME

HBCK special code name used as server name when manipulating ZK nodes

See Also:: Constant Field Values

KEY_FOR_HOSTNAME_SEEN_BY_MASTER

public static final String KEY_FOR_HOSTNAME_SEEN_BY_MASTER

See Also:: Constant Field Values

HBASE_MASTER_LOGCLEANER_PLUGINS

public static final String HBASE_MASTER_LOGCLEANER_PLUGINS

See Also:: Constant Field Values

HBASE_REGION_SPLIT_POLICY_KEY

public static final String HBASE_REGION_SPLIT_POLICY_KEY

See Also:: Constant Field Values

HBASE_RS_NONCES_ENABLED

public static final String HBASE_RS_NONCES_ENABLED

Whether nonces are enabled; default is true.

See Also:: Constant Field Values

HFILE_BLOCK_CACHE_SIZE_KEY

public static final String HFILE_BLOCK_CACHE_SIZE_KEY

Configuration key for the size of the block cache

See Also:: Constant Field Values

HFILE_BLOCK_CACHE_SIZE_DEFAULT

public static final float HFILE_BLOCK_CACHE_SIZE_DEFAULT

See Also:: Constant Field Values

HBASE_CLUSTER_MINIMUM_MEMORY_THRESHOLD

public static final float HBASE_CLUSTER_MINIMUM_MEMORY_THRESHOLD

See Also:: Constant Field Values

CP_HTD_ATTR_KEY_PATTERN

public static final Pattern CP_HTD_ATTR_KEY_PATTERN

CP_HTD_ATTR_VALUE_PATTERN

public static final Pattern CP_HTD_ATTR_VALUE_PATTERN

CP_HTD_ATTR_VALUE_PARAM_KEY_PATTERN

public static final String CP_HTD_ATTR_VALUE_PARAM_KEY_PATTERN

See Also:: Constant Field Values

CP_HTD_ATTR_VALUE_PARAM_VALUE_PATTERN

public static final String CP_HTD_ATTR_VALUE_PARAM_VALUE_PATTERN

See Also:: Constant Field Values

CP_HTD_ATTR_VALUE_PARAM_PATTERN

public static final Pattern CP_HTD_ATTR_VALUE_PARAM_PATTERN

SOCKET_RETRY_WAIT_MS

public static final int SOCKET_RETRY_WAIT_MS

The delay when re-trying a socket operation in a loop (HBASE-4712)

See Also:: Constant Field Values

LOCALHOST

public static final String LOCALHOST

Host name of the local machine

See Also:: Constant Field Values

HBASE_CHECKSUM_VERIFICATION

public static final String HBASE_CHECKSUM_VERIFICATION

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.

See Also:: Constant Field Values

LOCALHOST_IP

public static final String LOCALHOST_IP

See Also:: Constant Field Values

DISTRIBUTED_LOG_REPLAY_KEY

public static final String DISTRIBUTED_LOG_REPLAY_KEY

Conf key that enables unflushed WAL edits directly being replayed to region servers

See Also:: Constant Field Values

DEFAULT_DISTRIBUTED_LOG_REPLAY_CONFIG

public static final boolean DEFAULT_DISTRIBUTED_LOG_REPLAY_CONFIG

See Also:: Constant Field Values

DISALLOW_WRITES_IN_RECOVERING

public static final String DISALLOW_WRITES_IN_RECOVERING

See Also:: Constant Field Values

DEFAULT_DISALLOW_WRITES_IN_RECOVERING_CONFIG

public static final boolean DEFAULT_DISALLOW_WRITES_IN_RECOVERING_CONFIG

See Also:: Constant Field Values

REGION_SERVER_HANDLER_COUNT

public static final String REGION_SERVER_HANDLER_COUNT

See Also:: Constant Field Values

DEFAULT_REGION_SERVER_HANDLER_COUNT

public static final int DEFAULT_REGION_SERVER_HANDLER_COUNT

See Also:: Constant Field Values

REGION_SERVER_HANDLER_ABORT_ON_ERROR_PERCENT

public static final String REGION_SERVER_HANDLER_ABORT_ON_ERROR_PERCENT

See Also:: Constant Field Values

DEFAULT_REGION_SERVER_HANDLER_ABORT_ON_ERROR_PERCENT

public static final float DEFAULT_REGION_SERVER_HANDLER_ABORT_ON_ERROR_PERCENT

See Also:: Constant Field Values

REGION_SERVER_META_HANDLER_COUNT

public static final String REGION_SERVER_META_HANDLER_COUNT

See Also:: Constant Field Values

DEFAULT_REGION_SERVER_META_HANDLER_COUNT

public static final int DEFAULT_REGION_SERVER_META_HANDLER_COUNT

See Also:: Constant Field Values

REGION_SERVER_REPLICATION_HANDLER_COUNT

public static final String REGION_SERVER_REPLICATION_HANDLER_COUNT

See Also:: Constant Field Values

DEFAULT_REGION_SERVER_REPLICATION_HANDLER_COUNT

public static final int DEFAULT_REGION_SERVER_REPLICATION_HANDLER_COUNT

See Also:: Constant Field Values

MASTER_HANDLER_COUNT

public static final String MASTER_HANDLER_COUNT

See Also:: Constant Field Values

DEFAULT_MASTER_HANLDER_COUNT

public static final int DEFAULT_MASTER_HANLDER_COUNT

See Also:: Constant Field Values

LOG_REPLAY_WAIT_REGION_TIMEOUT

public static final String LOG_REPLAY_WAIT_REGION_TIMEOUT

Conf key that specifies timeout value to wait for a region ready

See Also:: Constant Field Values

BYTES_PER_CHECKSUM

public static final String BYTES_PER_CHECKSUM

The name of the configuration parameter that specifies the number of bytes in a newly created checksum chunk.

See Also:: Constant Field Values

CHECKSUM_TYPE_NAME

public static final String CHECKSUM_TYPE_NAME

The name of the configuration parameter that specifies the name of an algorithm that is used to compute checksums for newly created blocks.

See Also:: Constant Field Values

ENABLE_DATA_FILE_UMASK

public static final String ENABLE_DATA_FILE_UMASK

Enable file permission modification from standard hbase

See Also:: Constant Field Values

DATA_FILE_UMASK_KEY

public static final String DATA_FILE_UMASK_KEY

File permission umask to use when creating hbase data files

See Also:: Constant Field Values

ENABLE_WAL_COMPRESSION

public static final String ENABLE_WAL_COMPRESSION

Configuration name of HLog Compression

See Also:: Constant Field Values

METRICS_RIT_STUCK_WARNING_THRESHOLD

public static final String METRICS_RIT_STUCK_WARNING_THRESHOLD

Region in Transition metrics threshold time

See Also:: Constant Field Values

LOAD_BALANCER_SLOP_KEY

public static final String LOAD_BALANCER_SLOP_KEY

See Also:: Constant Field Values

NO_NEXT_INDEXED_KEY

public static final byte[] NO_NEXT_INDEXED_KEY

The byte array represents for NO_NEXT_INDEXED_KEY; The actual value is irrelevant because this is always compared by reference.

DELIMITER

public static final int DELIMITER

delimiter used between portions of a region name

See Also:: Constant Field Values

HBASE_CONFIG_READ_ZOOKEEPER_CONFIG

public static final String HBASE_CONFIG_READ_ZOOKEEPER_CONFIG

See Also:: Constant Field Values

DEFAULT_HBASE_CONFIG_READ_ZOOKEEPER_CONFIG

public static final boolean DEFAULT_HBASE_CONFIG_READ_ZOOKEEPER_CONFIG

See Also:: Constant Field Values

NORMAL_QOS

public static final int NORMAL_QOS

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.

See Also:: Constant Field Values

QOS_THRESHOLD

public static final int QOS_THRESHOLD

See Also:: Constant Field Values

HIGH_QOS

public static final int HIGH_QOS

See Also:: Constant Field Values

REPLICATION_QOS

public static final int REPLICATION_QOS

See Also:: Constant Field Values

REPLAY_QOS

public static final int REPLAY_QOS

See Also:: Constant Field Values

HFILE_ARCHIVE_DIRECTORY

public static final String HFILE_ARCHIVE_DIRECTORY

Directory under /hbase where archived hfiles are stored

See Also:: Constant Field Values

SNAPSHOT_DIR_NAME

public static final String SNAPSHOT_DIR_NAME

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.

See Also:: Constant Field Values

OLD_SNAPSHOT_DIR_NAME

public static final String OLD_SNAPSHOT_DIR_NAME

See Also:: Constant Field Values

HBASE_TEMP_DIRECTORY

public static final String HBASE_TEMP_DIRECTORY

Temporary directory used for table creation and deletion

See Also:: Constant Field Values

REGIONSERVER_METRICS_PERIOD

public static final String REGIONSERVER_METRICS_PERIOD

The period (in milliseconds) between computing region server point in time metrics

See Also:: Constant Field Values

DEFAULT_REGIONSERVER_METRICS_PERIOD

public static final long DEFAULT_REGIONSERVER_METRICS_PERIOD

See Also:: Constant Field Values

HBASE_NON_TABLE_DIRS

public static final List<String> HBASE_NON_TABLE_DIRS

Directories that are not HBase table directories

HBASE_NON_USER_TABLE_DIRS

public static final List<String> HBASE_NON_USER_TABLE_DIRS

Directories that are not HBase user table directories

HEALTH_SCRIPT_LOC

public static final String HEALTH_SCRIPT_LOC

Health script related settings.

See Also:: Constant Field Values

HEALTH_SCRIPT_TIMEOUT

public static final String HEALTH_SCRIPT_TIMEOUT

See Also:: Constant Field Values

HEALTH_CHORE_WAKE_FREQ

public static final String HEALTH_CHORE_WAKE_FREQ

See Also:: Constant Field Values

DEFAULT_HEALTH_SCRIPT_TIMEOUT

public static final long DEFAULT_HEALTH_SCRIPT_TIMEOUT

See Also:: Constant Field Values

HEALTH_FAILURE_THRESHOLD

public static final String HEALTH_FAILURE_THRESHOLD

The maximum number of health check failures a server can encounter consecutively.

See Also:: Constant Field Values

DEFAULT_HEALTH_FAILURE_THRESHOLD

public static final int DEFAULT_HEALTH_FAILURE_THRESHOLD

See Also:: Constant Field Values

STATUS_PUBLISHED

public static final String STATUS_PUBLISHED

Setting to activate, or not, the publication of the status by the master. Default notification is by a multicast message.

See Also:: Constant Field Values

STATUS_PUBLISHED_DEFAULT

public static final boolean STATUS_PUBLISHED_DEFAULT

See Also:: Constant Field Values

STATUS_MULTICAST_ADDRESS

public static final String STATUS_MULTICAST_ADDRESS

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.

See Also:: Constant Field Values

DEFAULT_STATUS_MULTICAST_ADDRESS

public static final String DEFAULT_STATUS_MULTICAST_ADDRESS

See Also:: Constant Field Values

STATUS_MULTICAST_BIND_ADDRESS

public static final String STATUS_MULTICAST_BIND_ADDRESS

The address to use for binding the local socket for receiving multicast. Defaults to 0.0.0.0.

See Also:: HBASE-9961, Constant Field Values

DEFAULT_STATUS_MULTICAST_BIND_ADDRESS

public static final String DEFAULT_STATUS_MULTICAST_BIND_ADDRESS

See Also:: Constant Field Values

STATUS_MULTICAST_PORT

public static final String STATUS_MULTICAST_PORT

The port to use for the multicast messages.

See Also:: Constant Field Values

DEFAULT_STATUS_MULTICAST_PORT

public static final int DEFAULT_STATUS_MULTICAST_PORT

See Also:: Constant Field Values

NO_NONCE

public static final long NO_NONCE

See Also:: Constant Field Values

CIPHER_AES

public static final String CIPHER_AES

Default cipher for encryption

See Also:: Constant Field Values

CRYPTO_CIPHERPROVIDER_CONF_KEY

@InterfaceStability.Unstable
public static final String CRYPTO_CIPHERPROVIDER_CONF_KEY

Configuration key for the crypto algorithm provider, a class name

See Also:: Constant Field Values

CRYPTO_KEYPROVIDER_CONF_KEY

@InterfaceStability.Unstable
public static final String CRYPTO_KEYPROVIDER_CONF_KEY

Configuration key for the crypto key provider, a class name

See Also:: Constant Field Values

CRYPTO_KEYPROVIDER_PARAMETERS_KEY

@InterfaceStability.Unstable
public static final String CRYPTO_KEYPROVIDER_PARAMETERS_KEY

Configuration key for the crypto key provider parameters

See Also:: Constant Field Values

CRYPTO_MASTERKEY_NAME_CONF_KEY

@InterfaceStability.Unstable
public static final String CRYPTO_MASTERKEY_NAME_CONF_KEY

Configuration key for the name of the master key for the cluster, a string

See Also:: Constant Field Values

CRYPTO_MASTERKEY_ALTERNATE_NAME_CONF_KEY

@InterfaceStability.Unstable
public static final String CRYPTO_MASTERKEY_ALTERNATE_NAME_CONF_KEY

Configuration key for the name of the alternate master key for the cluster, a string

See Also:: Constant Field Values

CRYPTO_WAL_ALGORITHM_CONF_KEY

@InterfaceStability.Unstable
public static final String CRYPTO_WAL_ALGORITHM_CONF_KEY

Configuration key for the algorithm to use when encrypting the WAL, a string

See Also:: Constant Field Values

CRYPTO_WAL_KEY_NAME_CONF_KEY

@InterfaceStability.Unstable
public static final String CRYPTO_WAL_KEY_NAME_CONF_KEY

Configuration key for the name of the master WAL encryption key for the cluster, a string

See Also:: Constant Field Values

CRYPTO_KEY_ALGORITHM_CONF_KEY

public static final String CRYPTO_KEY_ALGORITHM_CONF_KEY

Configuration key for the algorithm used for creating jks key, a string

See Also:: Constant Field Values

CRYPTO_ALTERNATE_KEY_ALGORITHM_CONF_KEY

public static final String CRYPTO_ALTERNATE_KEY_ALGORITHM_CONF_KEY

Configuration key for the name of the alternate cipher algorithm for the cluster, a string

See Also:: Constant Field Values

ENABLE_WAL_ENCRYPTION

public static final String ENABLE_WAL_ENCRYPTION

Configuration key for enabling WAL encryption, a boolean

See Also:: Constant Field Values

RPC_CODEC_CONF_KEY

public static final String RPC_CODEC_CONF_KEY

Configuration key for setting RPC codec class name

See Also:: Constant Field Values

REPLICATION_CODEC_CONF_KEY

public static final String REPLICATION_CODEC_CONF_KEY

Configuration key for setting replication codec class name

See Also:: Constant Field Values

ENABLE_CLIENT_BACKPRESSURE

public static final String ENABLE_CLIENT_BACKPRESSURE

Config key for if the server should send backpressure and if the client should listen to that backpressure from the server

See Also:: Constant Field Values

DEFAULT_ENABLE_CLIENT_BACKPRESSURE

public static final boolean DEFAULT_ENABLE_CLIENT_BACKPRESSURE

See Also:: Constant Field Values

HEAP_OCCUPANCY_LOW_WATERMARK_KEY

public static final String HEAP_OCCUPANCY_LOW_WATERMARK_KEY

See Also:: Constant Field Values

DEFAULT_HEAP_OCCUPANCY_LOW_WATERMARK

public static final float DEFAULT_HEAP_OCCUPANCY_LOW_WATERMARK

See Also:: Constant Field Values

HEAP_OCCUPANCY_HIGH_WATERMARK_KEY

public static final String HEAP_OCCUPANCY_HIGH_WATERMARK_KEY

See Also:: Constant Field Values

DEFAULT_HEAP_OCCUPANCY_HIGH_WATERMARK

public static final float DEFAULT_HEAP_OCCUPANCY_HIGH_WATERMARK

See Also:: Constant Field Values