org.apache.hadoop.hbase.io.hfile

Class BlockCacheFactory

java.lang.Object

org.apache.hadoop.hbase.io.hfile.BlockCacheFactory

@InterfaceAudience.Private
public final class BlockCacheFactory
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	BlockCacheFactory.ExternalBlockCaches Enum of all built in external block caches.

Field Summary

Fields

Modifier and Type	Field and Description
static String	BLOCKCACHE_BLOCKSIZE_KEY The target block size used by blockcache instances.
static String	BUCKET_CACHE_BUCKETS_KEY A comma-delimited array of values for use as bucket sizes.
static String	BUCKET_CACHE_PERSISTENT_PATH_KEY If the chosen ioengine can persist its state across restarts, the path to the file to persist to.
static String	BUCKET_CACHE_WRITER_QUEUE_KEY
static String	BUCKET_CACHE_WRITER_THREADS_KEY
static int	DEFAULT_BUCKET_CACHE_WRITER_QUEUE
static int	DEFAULT_BUCKET_CACHE_WRITER_THREADS Defaults for Bucket cache
(package private) static String	DEPRECATED_BLOCKCACHE_BLOCKSIZE_KEY Deprecated. use BLOCKCACHE_BLOCKSIZE_KEY instead.
private static String	EXTERNAL_BLOCKCACHE_CLASS_KEY
private static boolean	EXTERNAL_BLOCKCACHE_DEFAULT
private static String	EXTERNAL_BLOCKCACHE_KEY
private static org.slf4j.Logger	LOG

Constructor Summary

Constructors

Modifier	Constructor and Description
private	BlockCacheFactory()

Method Summary

Modifier and Type	Method and Description
static BlockCache	createBlockCache(org.apache.hadoop.conf.Configuration conf)
private static BucketCache	createBucketCache(org.apache.hadoop.conf.Configuration c)
private static BlockCache	createExternalBlockcache(org.apache.hadoop.conf.Configuration c)
private static LruBlockCache	createOnHeapCache(org.apache.hadoop.conf.Configuration c)

Methods inherited from class java.lang.Object

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

Field Detail

LOG

private static final org.slf4j.Logger LOG

BUCKET_CACHE_PERSISTENT_PATH_KEY

public static final String BUCKET_CACHE_PERSISTENT_PATH_KEY

If the chosen ioengine can persist its state across restarts, the path to the file to persist to. This file is NOT the data file. It is a file into which we will serialize the map of what is in the data file. For example, if you pass the following argument as BUCKET_CACHE_IOENGINE_KEY ("hbase.bucketcache.ioengine"), file:/tmp/bucketcache.data , then we will write the bucketcache data to the file /tmp/bucketcache.data but the metadata on where the data is in the supplied file is an in-memory map that needs to be persisted across restarts. Where to store this in-memory state is what you supply here: e.g. /tmp/bucketcache.map.

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Constant Field Values

BUCKET_CACHE_WRITER_THREADS_KEY

public static final String BUCKET_CACHE_WRITER_THREADS_KEY

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Constant Field Values

BUCKET_CACHE_WRITER_QUEUE_KEY

public static final String BUCKET_CACHE_WRITER_QUEUE_KEY

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Constant Field Values

BUCKET_CACHE_BUCKETS_KEY

public static final String BUCKET_CACHE_BUCKETS_KEY

A comma-delimited array of values for use as bucket sizes.

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Constant Field Values

DEFAULT_BUCKET_CACHE_WRITER_THREADS

public static final int DEFAULT_BUCKET_CACHE_WRITER_THREADS

Defaults for Bucket cache

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Constant Field Values

DEFAULT_BUCKET_CACHE_WRITER_QUEUE

public static final int DEFAULT_BUCKET_CACHE_WRITER_QUEUE

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Constant Field Values

BLOCKCACHE_BLOCKSIZE_KEY

public static final String BLOCKCACHE_BLOCKSIZE_KEY

The target block size used by blockcache instances. Defaults to HConstants.DEFAULT_BLOCKSIZE.

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Constant Field Values

EXTERNAL_BLOCKCACHE_KEY

private static final String EXTERNAL_BLOCKCACHE_KEY

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Constant Field Values

EXTERNAL_BLOCKCACHE_DEFAULT

private static final boolean EXTERNAL_BLOCKCACHE_DEFAULT

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Constant Field Values

EXTERNAL_BLOCKCACHE_CLASS_KEY

private static final String EXTERNAL_BLOCKCACHE_CLASS_KEY

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Constant Field Values

DEPRECATED_BLOCKCACHE_BLOCKSIZE_KEY

@Deprecated
static final String DEPRECATED_BLOCKCACHE_BLOCKSIZE_KEY

Deprecated. use BLOCKCACHE_BLOCKSIZE_KEY instead.

See Also:

Constant Field Values

Constructor Detail

BlockCacheFactory

private BlockCacheFactory()

Method Detail

createBlockCache

public static BlockCache createBlockCache(org.apache.hadoop.conf.Configuration conf)

createOnHeapCache

private static LruBlockCache createOnHeapCache(org.apache.hadoop.conf.Configuration c)

createExternalBlockcache

private static BlockCache createExternalBlockcache(org.apache.hadoop.conf.Configuration c)

createBucketCache

private static BucketCache createBucketCache(org.apache.hadoop.conf.Configuration c)