org.apache.hadoop.dfs
Interface FSConstants

All Known Implementing Classes:

DataNode, NameNode, SecondaryNameNode

public interface FSConstants

Some handy constants

Nested Class Summary

static class	FSConstants.CheckpointStates
static class	FSConstants.DatanodeReportType
static class	FSConstants.NodeType Type of the node
static class	FSConstants.SafeModeAction
static class	FSConstants.StartupOption
static class	FSConstants.UpgradeAction Distributed upgrade actions: 1.

Field Summary

static int	BLOCK_INVALIDATE_CHUNK
static long	BLOCKREPORT_INITIAL_DELAY
static long	BLOCKREPORT_INTERVAL
static int	BUFFER_SIZE
static int	COMPLETE_SUCCESS
static int	DATA_TRANSFER_VERSION Version for data transfers between clients and datanodes This should change when serialization of DatanodeInfo, not just when protocol changes.
static long	DEFAULT_BLOCK_SIZE
static int	DEFAULT_DATA_SOCKET_SIZE
static long	HEARTBEAT_INTERVAL
static int	LAYOUT_VERSION
static long	LEASE_HARDLIMIT_PERIOD
static long	LEASE_SOFTLIMIT_PERIOD
static int	MAX_PATH_DEPTH
static int	MAX_PATH_LENGTH
static int	MIN_BLOCKS_FOR_WRITE
static byte	OP_ACK
static byte	OP_BLOCKRECEIVED
static byte	OP_BLOCKREPORT
static byte	OP_CLIENT_ABANDONBLOCK
static byte	OP_CLIENT_ABANDONBLOCK_ACK
static byte	OP_CLIENT_ADDBLOCK
static byte	OP_CLIENT_ADDBLOCK_ACK
static byte	OP_CLIENT_COMPLETEFILE
static byte	OP_CLIENT_COMPLETEFILE_ACK
static byte	OP_CLIENT_DATANODE_HINTS
static byte	OP_CLIENT_DATANODE_HINTS_ACK
static byte	OP_CLIENT_DATANODEREPORT
static byte	OP_CLIENT_DATANODEREPORT_ACK
static byte	OP_CLIENT_DELETE
static byte	OP_CLIENT_DELETE_ACK
static byte	OP_CLIENT_EXISTS
static byte	OP_CLIENT_EXISTS_ACK
static byte	OP_CLIENT_ISDIR
static byte	OP_CLIENT_ISDIR_ACK
static byte	OP_CLIENT_LISTING
static byte	OP_CLIENT_LISTING_ACK
static byte	OP_CLIENT_MKDIRS
static byte	OP_CLIENT_MKDIRS_ACK
static byte	OP_CLIENT_OBTAINLOCK
static byte	OP_CLIENT_OBTAINLOCK_ACK
static byte	OP_CLIENT_OPEN
static byte	OP_CLIENT_OPEN_ACK
static byte	OP_CLIENT_RAWSTATS
static byte	OP_CLIENT_RAWSTATS_ACK
static byte	OP_CLIENT_RELEASELOCK
static byte	OP_CLIENT_RELEASELOCK_ACK
static byte	OP_CLIENT_RENAMETO
static byte	OP_CLIENT_RENAMETO_ACK
static byte	OP_CLIENT_RENEW_LEASE
static byte	OP_CLIENT_RENEW_LEASE_ACK
static byte	OP_CLIENT_STARTFILE
static byte	OP_CLIENT_STARTFILE_ACK
static byte	OP_CLIENT_TRYAGAIN
static byte	OP_COPY_BLOCK
static byte	OP_ERROR
static byte	OP_FAILURE
static byte	OP_HEARTBEAT
static byte	OP_INVALIDATE_BLOCKS
static byte	OP_READ_BLOCK
static byte	OP_READ_METADATA
static byte	OP_REPLACE_BLOCK
static int	OP_STATUS_CHECKSUM_OK
static int	OP_STATUS_ERROR
static int	OP_STATUS_ERROR_CHECKSUM
static int	OP_STATUS_ERROR_EXISTS
static int	OP_STATUS_ERROR_INVALID
static int	OP_STATUS_SUCCESS
static byte	OP_TRANSFERBLOCKS
static byte	OP_TRANSFERDATA
static byte	OP_WRITE_BLOCK
static int	OPERATION_FAILED
static int	READ_TIMEOUT
static int	SIZE_OF_INTEGER
static int	SMALL_BUFFER_SIZE
static int	STILL_WAITING
static int	WRITE_TIMEOUT
static int	WRITE_TIMEOUT_EXTENSION

Field Detail

MIN_BLOCKS_FOR_WRITE

static final int MIN_BLOCKS_FOR_WRITE

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OP_ERROR

static final byte OP_ERROR

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OP_HEARTBEAT

static final byte OP_HEARTBEAT

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OP_BLOCKRECEIVED

static final byte OP_BLOCKRECEIVED

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OP_BLOCKREPORT

static final byte OP_BLOCKREPORT

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OP_TRANSFERDATA

static final byte OP_TRANSFERDATA

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OP_CLIENT_OPEN

static final byte OP_CLIENT_OPEN

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OP_CLIENT_STARTFILE

static final byte OP_CLIENT_STARTFILE

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OP_CLIENT_ADDBLOCK

static final byte OP_CLIENT_ADDBLOCK

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OP_CLIENT_RENAMETO

static final byte OP_CLIENT_RENAMETO

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OP_CLIENT_DELETE

static final byte OP_CLIENT_DELETE

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OP_CLIENT_COMPLETEFILE

static final byte OP_CLIENT_COMPLETEFILE

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OP_CLIENT_LISTING

static final byte OP_CLIENT_LISTING

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OP_CLIENT_OBTAINLOCK

static final byte OP_CLIENT_OBTAINLOCK

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OP_CLIENT_RELEASELOCK

static final byte OP_CLIENT_RELEASELOCK

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OP_CLIENT_EXISTS

static final byte OP_CLIENT_EXISTS

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OP_CLIENT_ISDIR

static final byte OP_CLIENT_ISDIR

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OP_CLIENT_MKDIRS

static final byte OP_CLIENT_MKDIRS

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OP_CLIENT_RENEW_LEASE

static final byte OP_CLIENT_RENEW_LEASE

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OP_CLIENT_ABANDONBLOCK

static final byte OP_CLIENT_ABANDONBLOCK

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OP_CLIENT_RAWSTATS

static final byte OP_CLIENT_RAWSTATS

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OP_CLIENT_DATANODEREPORT

static final byte OP_CLIENT_DATANODEREPORT

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OP_CLIENT_DATANODE_HINTS

static final byte OP_CLIENT_DATANODE_HINTS

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OP_ACK

static final byte OP_ACK

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OP_TRANSFERBLOCKS

static final byte OP_TRANSFERBLOCKS

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OP_INVALIDATE_BLOCKS

static final byte OP_INVALIDATE_BLOCKS

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OP_FAILURE

static final byte OP_FAILURE

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OP_CLIENT_OPEN_ACK

static final byte OP_CLIENT_OPEN_ACK

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OP_CLIENT_STARTFILE_ACK

static final byte OP_CLIENT_STARTFILE_ACK

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OP_CLIENT_ADDBLOCK_ACK

static final byte OP_CLIENT_ADDBLOCK_ACK

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OP_CLIENT_RENAMETO_ACK

static final byte OP_CLIENT_RENAMETO_ACK

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OP_CLIENT_DELETE_ACK

static final byte OP_CLIENT_DELETE_ACK

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OP_CLIENT_COMPLETEFILE_ACK

static final byte OP_CLIENT_COMPLETEFILE_ACK

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OP_CLIENT_TRYAGAIN

static final byte OP_CLIENT_TRYAGAIN

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OP_CLIENT_LISTING_ACK

static final byte OP_CLIENT_LISTING_ACK

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OP_CLIENT_OBTAINLOCK_ACK

static final byte OP_CLIENT_OBTAINLOCK_ACK

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OP_CLIENT_RELEASELOCK_ACK

static final byte OP_CLIENT_RELEASELOCK_ACK

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OP_CLIENT_EXISTS_ACK

static final byte OP_CLIENT_EXISTS_ACK

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OP_CLIENT_ISDIR_ACK

static final byte OP_CLIENT_ISDIR_ACK

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OP_CLIENT_MKDIRS_ACK

static final byte OP_CLIENT_MKDIRS_ACK

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OP_CLIENT_RENEW_LEASE_ACK

static final byte OP_CLIENT_RENEW_LEASE_ACK

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OP_CLIENT_ABANDONBLOCK_ACK

static final byte OP_CLIENT_ABANDONBLOCK_ACK

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OP_CLIENT_RAWSTATS_ACK

static final byte OP_CLIENT_RAWSTATS_ACK

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OP_CLIENT_DATANODEREPORT_ACK

static final byte OP_CLIENT_DATANODEREPORT_ACK

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OP_CLIENT_DATANODE_HINTS_ACK

static final byte OP_CLIENT_DATANODE_HINTS_ACK

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OP_WRITE_BLOCK

static final byte OP_WRITE_BLOCK

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OP_READ_BLOCK

static final byte OP_READ_BLOCK

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OP_READ_METADATA

static final byte OP_READ_METADATA

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OP_REPLACE_BLOCK

static final byte OP_REPLACE_BLOCK

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OP_COPY_BLOCK

static final byte OP_COPY_BLOCK

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OP_STATUS_SUCCESS

static final int OP_STATUS_SUCCESS

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OP_STATUS_ERROR

static final int OP_STATUS_ERROR

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OP_STATUS_ERROR_CHECKSUM

static final int OP_STATUS_ERROR_CHECKSUM

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OP_STATUS_ERROR_INVALID

static final int OP_STATUS_ERROR_INVALID

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OP_STATUS_ERROR_EXISTS

static final int OP_STATUS_ERROR_EXISTS

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OP_STATUS_CHECKSUM_OK

static final int OP_STATUS_CHECKSUM_OK

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DATA_TRANSFER_VERSION

static final int DATA_TRANSFER_VERSION

Version for data transfers between clients and datanodes This should change when serialization of DatanodeInfo, not just when protocol changes. It is not very obvious.

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OPERATION_FAILED

static final int OPERATION_FAILED

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STILL_WAITING

static final int STILL_WAITING

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COMPLETE_SUCCESS

static final int COMPLETE_SUCCESS

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BLOCK_INVALIDATE_CHUNK

static final int BLOCK_INVALIDATE_CHUNK

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HEARTBEAT_INTERVAL

static final long HEARTBEAT_INTERVAL

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BLOCKREPORT_INTERVAL

static final long BLOCKREPORT_INTERVAL

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BLOCKREPORT_INITIAL_DELAY

static final long BLOCKREPORT_INITIAL_DELAY

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LEASE_SOFTLIMIT_PERIOD

static final long LEASE_SOFTLIMIT_PERIOD

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LEASE_HARDLIMIT_PERIOD

static final long LEASE_HARDLIMIT_PERIOD

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READ_TIMEOUT

static final int READ_TIMEOUT

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WRITE_TIMEOUT

static final int WRITE_TIMEOUT

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WRITE_TIMEOUT_EXTENSION

static final int WRITE_TIMEOUT_EXTENSION

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MAX_PATH_LENGTH

static final int MAX_PATH_LENGTH

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MAX_PATH_DEPTH

static final int MAX_PATH_DEPTH

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BUFFER_SIZE

static final int BUFFER_SIZE

SMALL_BUFFER_SIZE

static final int SMALL_BUFFER_SIZE

DEFAULT_BLOCK_SIZE

static final long DEFAULT_BLOCK_SIZE

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DEFAULT_DATA_SOCKET_SIZE

static final int DEFAULT_DATA_SOCKET_SIZE

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SIZE_OF_INTEGER

static final int SIZE_OF_INTEGER

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LAYOUT_VERSION

static final int LAYOUT_VERSION

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