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

package org.apache.hadoop.hdfs.server.datanode.fsdataset.impl
  • Class
    Description
    org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.AddBlockPoolException
    This exception collects all IOExceptions thrown when adding block pools and scanning volumes.
    org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.BlockPoolSlice
    A block pool slice represents a portion of a block pool stored on a volume.
    org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetCache
    Manages caching for an FsDatasetImpl by using the mmap(2) and mlock(2) system calls to lock blocks into memory.
    org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetFactory
    A factory for creating FsDatasetImpl objects.
    org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetUtil
    Utility methods.
    org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsVolumeImpl
    The underlying volume used to store replica.
    FsVolumeImpl.BlockDirFilter
    Filter for block file names stored on the file system volumes.
    org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsVolumeImplBuilder
    This class is to be used as a builder for FsVolumeImpl objects.
    org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.MappableBlock
    Represents an HDFS block that is mapped by the DataNode.
    org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.MappableBlockLoader
    Maps block to DataNode cache region.
    org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.MappableBlockLoaderFactory
    Creates MappableBlockLoader.
    org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.MemoryMappableBlockLoader
    Maps block to memory.
    org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.MemoryMappedBlock
    Represents an HDFS block that is mapped to memory by the DataNode.
    org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.MountVolumeMap
    MountVolumeMap contains information of the relationship between underlying filesystem mount and datanode volumes.
    org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.NativePmemMappableBlockLoader
    Map block to persistent memory with native PMDK libs.
    org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.NativePmemMappedBlock
    Represents an HDFS block that is mapped to persistent memory by the DataNode.
    org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.PmemMappableBlockLoader
    Maps block to persistent memory by using mapped byte buffer.
    org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.PmemMappedBlock
    Represents an HDFS block that is mapped to persistent memory by DataNode with mapped byte buffer.
    org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.PmemVolumeManager
    Manage the persistent memory volumes.
    org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.RamDiskReplicaLruTracker
    An implementation of RamDiskReplicaTracker that uses an LRU eviction scheme.
    org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.RamDiskReplicaTracker
     
    org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.ReplicaCachingGetSpaceUsed
    Fast and accurate class to tell how much space HDFS is using.
    org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.ReservedSpaceCalculator
    Used for calculating file system space reserved for non-HDFS data.
    org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.ReservedSpaceCalculator.Builder
    Used for creating instances of ReservedSpaceCalculator.
    org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.ReservedSpaceCalculator.ReservedSpaceCalculatorAbsolute
    Based on absolute number of reserved bytes.
    org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.ReservedSpaceCalculator.ReservedSpaceCalculatorAggressive
    Calculates absolute and percentage based reserved space and picks the one that will yield less reserved space.
    org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.ReservedSpaceCalculator.ReservedSpaceCalculatorConservative
    Calculates absolute and percentage based reserved space and picks the one that will yield more reserved space.
    org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.ReservedSpaceCalculator.ReservedSpaceCalculatorPercentage
    Based on percentage of total capacity in the storage.