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

Class PmemMappableBlockLoader

java.lang.Object

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

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

Direct Known Subclasses:

NativePmemMappableBlockLoader

@Private
@Unstable
public class PmemMappableBlockLoader
extends MappableBlockLoader

Maps block to persistent memory by using mapped byte buffer.

Constructor Summary

Constructors

Constructor	Description
PmemMappableBlockLoader()

Method Summary

Modifier and Type	Method	Description
long	getBlockId(File file)	Parse the file name and get the BlockId.
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

PmemMappableBlockLoader

public PmemMappableBlockLoader()

Method Details

getCacheUsed

public long getCacheUsed()

getCacheCapacity

public long getCacheCapacity()

isTransientCache

public boolean isTransientCache()

isNativeLoader

public boolean isNativeLoader()

getRecoveredMappableBlock

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

Throws:

IOException

getBlockId

public long getBlockId(File file)

Parse the file name and get the BlockId.