Package org.apache.hadoop.hdfs.server.diskbalancer.planner

Interface Step

All Known Implementing Classes:
MoveStep
public interface Step
A step in the plan.

  • Method Details

    • getBytesToMove

      long getBytesToMove()
      Return the number of bytes to move.
      Returns:
      bytes

    • getDestinationVolume

      DiskBalancerVolume getDestinationVolume()
      Gets the destination volume.
      Returns:
      - volume

    • getIdealStorage

      double getIdealStorage()
      Gets the IdealStorage.
      Returns:
      idealStorage

    • getSourceVolume

      DiskBalancerVolume getSourceVolume()
      Gets Source Volume.
      Returns:
      -- Source Volume

    • getVolumeSetID

      String getVolumeSetID()
      Gets a volume Set ID.
      Returns:
      String

    • getSizeString

      String getSizeString(long size)
      Returns a String representation of the Step Size.
      Returns:
      String

    • getMaxDiskErrors

      long getMaxDiskErrors()
      Returns maximum number of disk errors tolerated.
      Returns:
      long.

    • getTolerancePercent

      long getTolerancePercent()
      Returns tolerance percentage, the good enough value when we move data from one to disk to another.
      Returns:
      long.

    • getBandwidth

      long getBandwidth()
      Returns max disk bandwidth that disk balancer will use. Expressed in MB/sec. For example, a value like 10 indicates that disk balancer will only move 10 MB / sec while it is running.
      Returns:
      long.

    • setTolerancePercent

      void setTolerancePercent(long tolerancePercent)
      Sets Tolerance percent on a specific step.
      Parameters:
      tolerancePercent - - tolerance in percentage.

    • setBandwidth

      void setBandwidth(long bandwidth)
      Set Bandwidth on a specific step.
      Parameters:
      bandwidth - - in MB/s

    • setMaxDiskErrors

      void setMaxDiskErrors(long maxDiskErrors)
      Set maximum errors to tolerate before disk balancer step fails.
      Parameters:
      maxDiskErrors - - error count.