Package org.apache.hadoop.hbase.mob

Class MobConstants

java.lang.Object

org.apache.hadoop.hbase.mob.MobConstants

@Public
public final class MobConstants
extends Object

The constants used in mob.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	BULKLOAD_DIR_NAME	Old configuration parameters (obsolete)
static final float	DEFAULT_EVICT_REMAIN_RATIO
static final long	DEFAULT_MIN_AGE_TO_ARCHIVE
static final long	DEFAULT_MOB_CACHE_EVICT_PERIOD
static final int	DEFAULT_MOB_CLEANER_BATCH_SIZE_UPPER_BOUND
static final int	DEFAULT_MOB_CLEANER_PERIOD
static final int	DEFAULT_MOB_COMPACTION_BATCH_SIZE
static final int	DEFAULT_MOB_COMPACTION_CHORE_PERIOD
static final long	DEFAULT_MOB_COMPACTION_MAX_FILE_SIZE	Default maximum selection size = 1GB
static final long	DEFAULT_MOB_COMPACTION_MERGEABLE_THRESHOLD
static final int	DEFAULT_MOB_COMPACTION_THREADS_MAX
static final String	DEFAULT_MOB_COMPACTION_TYPE
static final int	DEFAULT_MOB_DELFILE_MAX_COUNT
static final boolean	DEFAULT_MOB_DISCARD_MISS
static final int	DEFAULT_MOB_FILE_CACHE_SIZE
static final int	DEFAULT_MOB_MAJOR_COMPACTION_REGION_BATCH_SIZE	Default is 0 - means no limit - all regions of a MOB table will be compacted at once
static final String	DEPRECATED_MOB_CLEANER_PERIOD
static final String	EMPTY_STRING
static final String	EMPTY_VALUE_ON_MOBCELL_MISS
static final String	FULL_MOB_COMPACTION_TYPE
static final String	MIN_AGE_TO_ARCHIVE_KEY	Minimum MOB file age to archive, default (3600000 - 1h)
static final String	MOB_CACHE_BLOCKS
static final String	MOB_CACHE_EVICT_PERIOD
static final String	MOB_CACHE_EVICT_REMAIN_RATIO
static final String	MOB_CLEANER_BATCH_SIZE_UPPER_BOUND
static final String	MOB_CLEANER_PERIOD
static final String	MOB_COMPACTION_BATCH_SIZE	The max number of the mob files that is allowed in a batch of the mob compaction.
static final String	MOB_COMPACTION_CHORE_PERIOD	The period that MobCompactionChore runs.
static final String	MOB_COMPACTION_MAX_FILE_SIZE_KEY	Maximum size of a MOB compaction selection
static final String	MOB_COMPACTION_MERGEABLE_THRESHOLD	If the size of a mob file is less than this value, it's regarded as a small file and needs to be merged in mob compaction.
static final String	MOB_COMPACTION_THREADS_MAX
static final String	MOB_COMPACTION_TYPE_KEY
static final String	MOB_COMPACTOR_CLASS_KEY
static final String	MOB_DELFILE_MAX_COUNT	The max number of del files that is allowed in the mob file compaction.
static final String	MOB_DIR_NAME
static final String	MOB_FILE_CACHE_SIZE_KEY
static final String	MOB_MAJOR_COMPACTION_REGION_BATCH_SIZE	The max number of a MOB table regions that is allowed in a batch of the mob compaction.
static final Tag	MOB_REF_TAG
static final String	MOB_REGION_NAME
static final byte[]	MOB_REGION_NAME_BYTES
static final String	MOB_SCAN_RAW
static final String	MOB_SCAN_REF_ONLY
static final byte[]	MOB_TABLE_LOCK_SUFFIX
static final String	MOB_UNSAFE_DISCARD_MISS_KEY	Use this configuration option with caution, only during upgrade procedure to handle missing MOB cells during compaction.
static final String	OPTIMIZED_MOB_COMPACTION_TYPE	Mob compaction type: "full", "optimized" "full" - run full major compaction (during migration) "optimized" - optimized version for use case with infrequent updates/deletes
static final String	TEMP_DIR_NAME

Constructor Summary

Constructors

Modifier	Constructor	Description
private	MobConstants()

Method Summary

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

MOB_SCAN_RAW

public static final String MOB_SCAN_RAW

See Also:

• Constant Field Values

MOB_CACHE_BLOCKS

public static final String MOB_CACHE_BLOCKS

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MOB_SCAN_REF_ONLY

public static final String MOB_SCAN_REF_ONLY

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EMPTY_VALUE_ON_MOBCELL_MISS

public static final String EMPTY_VALUE_ON_MOBCELL_MISS

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MOB_FILE_CACHE_SIZE_KEY

public static final String MOB_FILE_CACHE_SIZE_KEY

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DEFAULT_MOB_FILE_CACHE_SIZE

public static final int DEFAULT_MOB_FILE_CACHE_SIZE

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MOB_DIR_NAME

public static final String MOB_DIR_NAME

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MOB_REGION_NAME

public static final String MOB_REGION_NAME

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MOB_REGION_NAME_BYTES

public static final byte[] MOB_REGION_NAME_BYTES

MOB_CLEANER_PERIOD

public static final String MOB_CLEANER_PERIOD

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DEPRECATED_MOB_CLEANER_PERIOD

public static final String DEPRECATED_MOB_CLEANER_PERIOD

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DEFAULT_MOB_CLEANER_PERIOD

public static final int DEFAULT_MOB_CLEANER_PERIOD

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MOB_CACHE_EVICT_PERIOD

public static final String MOB_CACHE_EVICT_PERIOD

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MOB_CACHE_EVICT_REMAIN_RATIO

public static final String MOB_CACHE_EVICT_REMAIN_RATIO

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MOB_REF_TAG

public static final Tag MOB_REF_TAG

MOB_CLEANER_BATCH_SIZE_UPPER_BOUND

public static final String MOB_CLEANER_BATCH_SIZE_UPPER_BOUND

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DEFAULT_MOB_CLEANER_BATCH_SIZE_UPPER_BOUND

public static final int DEFAULT_MOB_CLEANER_BATCH_SIZE_UPPER_BOUND

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DEFAULT_EVICT_REMAIN_RATIO

public static final float DEFAULT_EVICT_REMAIN_RATIO

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DEFAULT_MOB_CACHE_EVICT_PERIOD

public static final long DEFAULT_MOB_CACHE_EVICT_PERIOD

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TEMP_DIR_NAME

public static final String TEMP_DIR_NAME

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MOB_MAJOR_COMPACTION_REGION_BATCH_SIZE

public static final String MOB_MAJOR_COMPACTION_REGION_BATCH_SIZE

The max number of a MOB table regions that is allowed in a batch of the mob compaction. By setting this number to a custom value, users can control the overall effect of a major compaction of a large MOB-enabled table.

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• Constant Field Values

DEFAULT_MOB_MAJOR_COMPACTION_REGION_BATCH_SIZE

public static final int DEFAULT_MOB_MAJOR_COMPACTION_REGION_BATCH_SIZE

Default is 0 - means no limit - all regions of a MOB table will be compacted at once

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MOB_COMPACTION_CHORE_PERIOD

public static final String MOB_COMPACTION_CHORE_PERIOD

The period that MobCompactionChore runs. The unit is second. The default value is one week.

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DEFAULT_MOB_COMPACTION_CHORE_PERIOD

public static final int DEFAULT_MOB_COMPACTION_CHORE_PERIOD

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MOB_COMPACTOR_CLASS_KEY

public static final String MOB_COMPACTOR_CLASS_KEY

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OPTIMIZED_MOB_COMPACTION_TYPE

public static final String OPTIMIZED_MOB_COMPACTION_TYPE

Mob compaction type: "full", "optimized" "full" - run full major compaction (during migration) "optimized" - optimized version for use case with infrequent updates/deletes

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FULL_MOB_COMPACTION_TYPE

public static final String FULL_MOB_COMPACTION_TYPE

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MOB_COMPACTION_TYPE_KEY

public static final String MOB_COMPACTION_TYPE_KEY

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DEFAULT_MOB_COMPACTION_TYPE

public static final String DEFAULT_MOB_COMPACTION_TYPE

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MOB_COMPACTION_MAX_FILE_SIZE_KEY

public static final String MOB_COMPACTION_MAX_FILE_SIZE_KEY

Maximum size of a MOB compaction selection

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DEFAULT_MOB_COMPACTION_MAX_FILE_SIZE

public static final long DEFAULT_MOB_COMPACTION_MAX_FILE_SIZE

Default maximum selection size = 1GB

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MOB_UNSAFE_DISCARD_MISS_KEY

public static final String MOB_UNSAFE_DISCARD_MISS_KEY

Use this configuration option with caution, only during upgrade procedure to handle missing MOB cells during compaction.

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DEFAULT_MOB_DISCARD_MISS

public static final boolean DEFAULT_MOB_DISCARD_MISS

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MIN_AGE_TO_ARCHIVE_KEY

public static final String MIN_AGE_TO_ARCHIVE_KEY

Minimum MOB file age to archive, default (3600000 - 1h)

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DEFAULT_MIN_AGE_TO_ARCHIVE

public static final long DEFAULT_MIN_AGE_TO_ARCHIVE

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BULKLOAD_DIR_NAME

public static final String BULKLOAD_DIR_NAME

Old configuration parameters (obsolete)

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MOB_TABLE_LOCK_SUFFIX

public static final byte[] MOB_TABLE_LOCK_SUFFIX

EMPTY_STRING

public static final String EMPTY_STRING

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MOB_COMPACTION_MERGEABLE_THRESHOLD

public static final String MOB_COMPACTION_MERGEABLE_THRESHOLD

If the size of a mob file is less than this value, it's regarded as a small file and needs to be merged in mob compaction. The default value is 1280MB.

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DEFAULT_MOB_COMPACTION_MERGEABLE_THRESHOLD

public static final long DEFAULT_MOB_COMPACTION_MERGEABLE_THRESHOLD

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MOB_DELFILE_MAX_COUNT

public static final String MOB_DELFILE_MAX_COUNT

The max number of del files that is allowed in the mob file compaction. In the mob compaction, when the number of existing del files is larger than this value, they are merged until number of del files is not larger this value. The default value is 3.

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DEFAULT_MOB_DELFILE_MAX_COUNT

public static final int DEFAULT_MOB_DELFILE_MAX_COUNT

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MOB_COMPACTION_BATCH_SIZE

public static final String MOB_COMPACTION_BATCH_SIZE

The max number of the mob files that is allowed in a batch of the mob compaction. The mob compaction merges the small mob files to bigger ones. If the number of the small files is very large, it could lead to a "too many opened file handlers" in the merge. And the merge has to be split into batches. This value limits the number of mob files that are selected in a batch of the mob compaction. The default value is 100. Default is 0 - means no limit - all regions of a MOB table will be compacted at once

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DEFAULT_MOB_COMPACTION_BATCH_SIZE

public static final int DEFAULT_MOB_COMPACTION_BATCH_SIZE

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MOB_COMPACTION_THREADS_MAX

public static final String MOB_COMPACTION_THREADS_MAX

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DEFAULT_MOB_COMPACTION_THREADS_MAX

public static final int DEFAULT_MOB_COMPACTION_THREADS_MAX

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Constructor Details

MobConstants

private MobConstants()