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

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

Method Summary

Modifier and Type	Method and Description
static BlockCache	createBlockCache(org.apache.hadoop.conf.Configuration conf)

Methods inherited from class java.lang.Object

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

Field Detail

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

Method Detail

createBlockCache

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