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

Interface MappableBlock

All Superinterfaces:
AutoCloseable, Closeable
All Known Implementing Classes:
MemoryMappedBlock, NativePmemMappedBlock, PmemMappedBlock
@Private @Unstable public interface MappableBlock extends Closeable
Represents an HDFS block that is mapped by the DataNode.

  • Method Summary

    Modifier and Type
    Method
    Description
    long
    getAddress()
    Get cache address if applicable.
    org.apache.hadoop.hdfs.ExtendedBlockId
    getKey()
    Get cached block's ExtendedBlockId.
    long
    getLength()
    Get the number of bytes that have been cached.

    Methods inherited from interface java.io.Closeable

    close

  • Method Details

    • getLength

      long getLength()
      Get the number of bytes that have been cached.
      Returns:
      the number of bytes that have been cached.

    • getAddress

      long getAddress()
      Get cache address if applicable. Return -1 if not applicable.

    • getKey

      org.apache.hadoop.hdfs.ExtendedBlockId getKey()
      Get cached block's ExtendedBlockId.
      Returns:
      cached block's ExtendedBlockId..