Package org.apache.hadoop.hbase.regionserver

Class StripeStoreConfig

java.lang.Object

org.apache.hadoop.hbase.regionserver.StripeStoreConfig

@Private
public class StripeStoreConfig
extends Object

Configuration class for stripe store and compactions. See StripeStoreFileManager for general documentation. See getters for the description of each setting.

Field Summary

Fields

Modifier and Type	Field	Description
private static final double	EPSILON
static final String	FLUSH_TO_L0_KEY	Whether to flush memstore to L0 files, or directly to stripes.
private final boolean	flushIntoL0
static final String	INITIAL_STRIPE_COUNT_KEY	The initial stripe count to create.
private final int	initialCount
private final int	level0CompactMinFiles
private static final org.slf4j.Logger	LOG
static final String	MAX_FILES_KEY	The maximum number of files to compact within a stripe; same as for regular compaction.
static final String	MAX_REGION_SPLIT_IMBALANCE_KEY	When splitting region, the maximum size imbalance to allow in an attempt to split at a stripe boundary, so that no files go to both regions.
private final float	maxRegionSplitImbalance
static final String	MIN_FILES_KEY	The minimum number of files to compact within a stripe; same as for regular compaction.
static final String	MIN_FILES_L0_KEY	The minimum number of files to compact when compacting L0; same as minFiles for regular compaction.
static final String	SIZE_TO_SPLIT_KEY	The size the stripe should achieve to be considered for splitting into multiple stripes.
private final long	sizeToSplitAt
static final String	SPLIT_PARTS_KEY	The target count of new stripes to produce when splitting a stripe.
private final float	splitPartCount
private final long	splitPartSize
private final int	stripeCompactMaxFiles
private final int	stripeCompactMinFiles

Constructor Summary

Constructors

Constructor	Description
StripeStoreConfig(org.apache.hadoop.conf.Configuration config, StoreConfigInformation sci)

Method Summary

Modifier and Type	Method	Description
private static float	getFloat(org.apache.hadoop.conf.Configuration config, String key, float defaultValue, boolean moreThanOne)
int	getInitialCount()
int	getLevel0MinFiles()
float	getMaxSplitImbalance()
float	getSplitCount()
long	getSplitPartSize()
long	getSplitSize()
int	getStripeCompactMaxFiles()
int	getStripeCompactMinFiles()
boolean	isUsingL0Flush()

Methods inherited from class java.lang.Object

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

Field Details

LOG

private static final org.slf4j.Logger LOG

MAX_FILES_KEY

public static final String MAX_FILES_KEY

The maximum number of files to compact within a stripe; same as for regular compaction.

See Also:

• Constant Field Values

MIN_FILES_KEY

public static final String MIN_FILES_KEY

The minimum number of files to compact within a stripe; same as for regular compaction.

See Also:

• Constant Field Values

MIN_FILES_L0_KEY

public static final String MIN_FILES_L0_KEY

The minimum number of files to compact when compacting L0; same as minFiles for regular compaction. Given that L0 causes unnecessary overwriting of the data, should be higher than regular minFiles.

See Also:

• Constant Field Values

SIZE_TO_SPLIT_KEY

public static final String SIZE_TO_SPLIT_KEY

The size the stripe should achieve to be considered for splitting into multiple stripes. Stripe will be split when it can be fully compacted, and it is above this size.

See Also:

• Constant Field Values

SPLIT_PARTS_KEY

public static final String SPLIT_PARTS_KEY

The target count of new stripes to produce when splitting a stripe. A floating point number, default is 2. Values less than 1 will be converted to 1/x. Non-whole numbers will produce unbalanced splits, which may be good for some cases. In this case the "smaller" of the new stripes will always be the rightmost one. If the stripe is bigger than sizeToSplit when splitting, this will be adjusted by a whole increment.

See Also:

• Constant Field Values

INITIAL_STRIPE_COUNT_KEY

public static final String INITIAL_STRIPE_COUNT_KEY

The initial stripe count to create. If the row distribution is roughly the same over time, it's good to set this to a count of stripes that is expected to be achieved in most regions, to get this count from the outset and prevent unnecessary splitting.

See Also:

• Constant Field Values

FLUSH_TO_L0_KEY

public static final String FLUSH_TO_L0_KEY

Whether to flush memstore to L0 files, or directly to stripes.

See Also:

• Constant Field Values

MAX_REGION_SPLIT_IMBALANCE_KEY

public static final String MAX_REGION_SPLIT_IMBALANCE_KEY

When splitting region, the maximum size imbalance to allow in an attempt to split at a stripe boundary, so that no files go to both regions. Most users won't need to change that.

See Also:

• Constant Field Values

maxRegionSplitImbalance

private final float maxRegionSplitImbalance

level0CompactMinFiles

private final int level0CompactMinFiles

stripeCompactMinFiles

private final int stripeCompactMinFiles

stripeCompactMaxFiles

private final int stripeCompactMaxFiles

initialCount

private final int initialCount

sizeToSplitAt

private final long sizeToSplitAt

splitPartCount

private final float splitPartCount

flushIntoL0

private final boolean flushIntoL0

splitPartSize

private final long splitPartSize

EPSILON

private static final double EPSILON

See Also:

• Constant Field Values

Constructor Details

StripeStoreConfig

public StripeStoreConfig(org.apache.hadoop.conf.Configuration config,
 StoreConfigInformation sci)

Method Details

getFloat

private static float getFloat(org.apache.hadoop.conf.Configuration config,
 String key,
 float defaultValue,
 boolean moreThanOne)

getMaxSplitImbalance

public float getMaxSplitImbalance()

getLevel0MinFiles

public int getLevel0MinFiles()

getStripeCompactMinFiles

public int getStripeCompactMinFiles()

getStripeCompactMaxFiles

public int getStripeCompactMaxFiles()

isUsingL0Flush

public boolean isUsingL0Flush()

getSplitSize

public long getSplitSize()

getInitialCount

public int getInitialCount()

getSplitCount

public float getSplitCount()

getSplitPartSize

public long getSplitPartSize()

Returns:

the desired size of the target stripe when splitting, in bytes. Derived from getSplitSize() and getSplitCount().