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
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.

See Also:

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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

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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()