Public

RBW files. They get moved to the finalized block directory when the block is
finalized.

createRbwFile

getFinalizedDir

getLazypersistDir

selectReplicaToDelete

<init>

Move a persisted replica from lazypersist directory to a subdirectory under
finalized.

activateSavedReplica

Add replicas under the given directory to the volume map

addToReplicasMap

checkDirs

Temporary files. They get moved to the finalized block directory when the block
is finalized.

createTmpFile

Run DU on local drives. It must be synchronized from caller.

decDfsUsed

deleteReplica

getDfsUsed

getRbwDir

getTmpDir

getVolumeMap

incDfsUsed

Read in the cached DU value and return it if it is less than
cachedDfsUsedCheckTime which is set by


loadDfsUsed

Move replicas in the lazy persist directory to their corresponding locations in
the finalized direct

moveLazyPersistReplicasToFinalized

Recover an unlinked tmp file on datanode restart. If the original block does not
exist, then the tmp

recoverTempUnlinkedBlock

This method is invoked during DN startup when volumes are scanned to build up
the volumeMap. Given t

resolveDuplicateReplicas

Making http post requests using okhttp

This Graphics2D class extends the Graphics class to provide more sophisticated
control overgraphics 

java.awt.Graphics2D

A legacy iteration interface.New code should use Iterator instead. Iterator
replaces the enumeration

java.util.Enumeration

A Properties object is a Hashtable where the keys and values must be Strings.
Each property can have

java.util.Properties

A synchronization aid that allows one or more threads to wait until a set of
operations being perfor

java.util.concurrent.CountDownLatch

An interface for the creation of Connection objects which represent a connection
to a database. This

javax.sql.DataSource

Main entry-point into the library.

Options represents a collection of Option objects, which describ

org.apache.commons.cli.Options

compareTo

getApplicationContext

notifyDataSetChanged

/**
   * Create a blook pool slice
   * @param bpid Block pool Id
   * @param volume {@link FsVolumeImpl} to which this BlockPool belongs to
   * @param bpDir directory corresponding to the BlockPool
   * @param conf configuration
   * @param timer include methods for getting time
   * @throws IOException
   */

// Files that were being written when the datanode was last shutdown

// are now moved back to the data directory. It is possible that

// in the future, we might want to do some sort of datanode-local

// recovery for these blocks. For example, crc validation.

// create the rbw and tmp directories if they don't exist.

// Use cached value initially if available. Or the following call will

// block until the initial du command completes.

// Make the dfs usage to be saved during shutdown.

/**
   * Create a blook pool slice 
   * @param bpid Block pool Id
   * @param volume {@link FsVolumeImpl} to which this BlockPool belongs to
   * @param bpDir directory corresponding to the BlockPool
   * @param conf configuration
   * @throws IOException
   */

How to use loadDfsUsedmethodin org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.BlockPoolSlice

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How to use
loadDfsUsed
method
in
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.BlockPoolSlice