Package org.apache.hadoop.fs.impl.prefetch

Class BlockManagerParameters

java.lang.Object

org.apache.hadoop.fs.impl.prefetch.BlockManagerParameters

@Private
public final class BlockManagerParameters
extends java.lang.Object

This class is used to provide parameters to BlockManager.

Constructor Summary

Constructors

Constructor	Description
BlockManagerParameters()

Method Summary

Modifier and Type	Method	Description
BlockData	getBlockData()
int	getBufferPoolSize()
Configuration	getConf()
ExecutorServiceFuturePool	getFuturePool()
LocalDirAllocator	getLocalDirAllocator()
int	getMaxBlocksCount()
PrefetchingStatistics	getPrefetchingStatistics()
DurationTrackerFactory	getTrackerFactory()
BlockManagerParameters	withBlockData(BlockData data)	Sets the object holding blocks data info for the underlying file.
BlockManagerParameters	withBufferPoolSize(int poolSize)	Sets the in-memory cache size as number of blocks.
BlockManagerParameters	withConf(Configuration configuration)	Sets the configuration object.
BlockManagerParameters	withFuturePool(ExecutorServiceFuturePool pool)	Sets the executor service future pool that is later used to perform async prefetch tasks.
BlockManagerParameters	withLocalDirAllocator(LocalDirAllocator dirAllocator)	Sets the local dir allocator for round-robin disk allocation while creating files.
BlockManagerParameters	withMaxBlocksCount(int blocksCount)	Sets the max blocks count to be kept in cache at any time.
BlockManagerParameters	withPrefetchingStatistics(PrefetchingStatistics statistics)	Sets the prefetching statistics for the stream.
BlockManagerParameters	withTrackerFactory(DurationTrackerFactory factory)	Sets the duration tracker with statistics to update.

Methods inherited from class java.lang.Object

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

Constructor Detail

BlockManagerParameters

public BlockManagerParameters()

Method Detail

getFuturePool

public ExecutorServiceFuturePool getFuturePool()

Returns:

The Executor future pool to perform async prefetch tasks.

getBlockData

public BlockData getBlockData()

Returns:

The object holding blocks data info for the underlying file.

getBufferPoolSize

public int getBufferPoolSize()

Returns:

The size of the in-memory cache.

getPrefetchingStatistics

public PrefetchingStatistics getPrefetchingStatistics()

Returns:

The prefetching statistics for the stream.

getConf

public Configuration getConf()

Returns:

The configuration object.

getLocalDirAllocator

public LocalDirAllocator getLocalDirAllocator()

Returns:

The local dir allocator instance.

getMaxBlocksCount

public int getMaxBlocksCount()

Returns:

The max blocks count to be kept in cache at any time.

getTrackerFactory

public DurationTrackerFactory getTrackerFactory()

Returns:

The duration tracker with statistics to update.

withFuturePool

public BlockManagerParameters withFuturePool(ExecutorServiceFuturePool pool)

Sets the executor service future pool that is later used to perform async prefetch tasks.

Parameters:

pool - The future pool.

Returns:

The builder.

withBlockData

public BlockManagerParameters withBlockData(BlockData data)

Sets the object holding blocks data info for the underlying file.

Parameters:

data - The block data object.

Returns:

The builder.

withBufferPoolSize

public BlockManagerParameters withBufferPoolSize(int poolSize)

Sets the in-memory cache size as number of blocks.

Parameters:

poolSize - The buffer pool size as number of blocks.

Returns:

The builder.

withPrefetchingStatistics

public BlockManagerParameters withPrefetchingStatistics(PrefetchingStatistics statistics)

Sets the prefetching statistics for the stream.

Parameters:

statistics - The prefetching statistics.

Returns:

The builder.

withConf

public BlockManagerParameters withConf(Configuration configuration)

Sets the configuration object.

Parameters:

configuration - The configuration object.

Returns:

The builder.

withLocalDirAllocator

public BlockManagerParameters withLocalDirAllocator(LocalDirAllocator dirAllocator)

Sets the local dir allocator for round-robin disk allocation while creating files.

Parameters:

dirAllocator - The local dir allocator object.

Returns:

The builder.

withMaxBlocksCount

public BlockManagerParameters withMaxBlocksCount(int blocksCount)

Sets the max blocks count to be kept in cache at any time.

Parameters:

blocksCount - The max blocks count.

Returns:

The builder.

withTrackerFactory

public BlockManagerParameters withTrackerFactory(DurationTrackerFactory factory)

Sets the duration tracker with statistics to update.

Parameters:

factory - The tracker factory object.

Returns:

The builder.