Package org.apache.hadoop.hdfs.server.datanode.fsdataset.impl

Class MemoryMappableBlockLoader

java.lang.Object

org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.MappableBlockLoader

org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.MemoryMappableBlockLoader

@Private
@Unstable
public class MemoryMappableBlockLoader
extends MappableBlockLoader

Maps block to memory.

Constructor Summary

Constructors

Constructor	Description
MemoryMappableBlockLoader()

Method Summary

Modifier and Type	Method	Description
long	getCacheCapacity()
long	getCacheUsed()
MappableBlock	getRecoveredMappableBlock(File cacheFile, String bpid, byte volumeIndex)
boolean	isNativeLoader()
boolean	isTransientCache()

Methods inherited from class org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.MappableBlockLoader

fillBuffer, verifyChecksum

Methods inherited from class java.lang.Object

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

Constructor Details

MemoryMappableBlockLoader

public MemoryMappableBlockLoader()

Method Details

getCacheUsed

public long getCacheUsed()

getCacheCapacity

public long getCacheCapacity()

isTransientCache

public boolean isTransientCache()

getRecoveredMappableBlock

public MappableBlock getRecoveredMappableBlock(File cacheFile,
 String bpid,
 byte volumeIndex)
                                        throws IOException

Throws:

IOException

isNativeLoader

public boolean isNativeLoader()