Package org.apache.flink.runtime.io.network.partition

Enum BoundedBlockingSubpartitionType

java.lang.Object
java.lang.Enum<BoundedBlockingSubpartitionType>
org.apache.flink.runtime.io.network.partition.BoundedBlockingSubpartitionType
All Implemented Interfaces:
Serializable, Comparable<BoundedBlockingSubpartitionType>
public enum BoundedBlockingSubpartitionType extends Enum<BoundedBlockingSubpartitionType>
The type of the BoundedBlockingSubpartition. Also doubles as the factory.

  • Enum Constant Summary

    Enum Constants
    Enum Constant
    Description
    AUTO
    Selects the BoundedBlockingSubpartition type based on the current memory architecture.
    FILE
    A BoundedBlockingSubpartition type that simply stores the partition data in a file.
    FILE_MMAP
    Creates a BoundedBlockingSubpartition that stores the partition data in a file and memory maps that file for reading.
    MMAP
    A BoundedBlockingSubpartition type that stores the partition data in memory mapped file.

  • Method Summary

    Modifier and Type
    Method
    Description
    abstract org.apache.flink.runtime.io.network.partition.BoundedBlockingSubpartition
    create(int index, ResultPartition parent, File tempFile, int readBufferSize, boolean sslEnabled)
    Creates BoundedBlockingSubpartition of this type.
    static BoundedBlockingSubpartitionType
    valueOf(String name)
    Returns the enum constant of this type with the specified name.
    static BoundedBlockingSubpartitionType[]
    values()
    Returns an array containing the constants of this enum type, in the order they are declared.

    Methods inherited from class java.lang.Enum

    clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

    Methods inherited from class java.lang.Object

    getClass, notify, notifyAll, wait, wait, wait

  • Enum Constant Details

    • FILE

      public static final BoundedBlockingSubpartitionType FILE
      A BoundedBlockingSubpartition type that simply stores the partition data in a file. Data is eagerly spilled (written to disk) and readers directly read from the file.

    • MMAP

      public static final BoundedBlockingSubpartitionType MMAP
      A BoundedBlockingSubpartition type that stores the partition data in memory mapped file. Data is written to and read from the mapped memory region. Disk spilling happens lazily, when the OS swaps out the pages from the memory mapped file.

    • FILE_MMAP

      public static final BoundedBlockingSubpartitionType FILE_MMAP
      Creates a BoundedBlockingSubpartition that stores the partition data in a file and memory maps that file for reading. Data is eagerly spilled (written to disk) and then mapped into memory. The main difference to the MMAP variant is that no I/O is necessary when pages from the memory mapped file are evicted.

    • AUTO

      public static final BoundedBlockingSubpartitionType AUTO
      Selects the BoundedBlockingSubpartition type based on the current memory architecture. If 64-bit, the type of FILE_MMAP is recommended. Otherwise, the type of FILE is by default.

  • Method Details

    • values

      public static BoundedBlockingSubpartitionType[] values()
      Returns an array containing the constants of this enum type, in the order they are declared.
      Returns:
      an array containing the constants of this enum type, in the order they are declared

    • valueOf

      public static BoundedBlockingSubpartitionType valueOf(String name)
      Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
      Parameters:
      name - the name of the enum constant to be returned.
      Returns:
      the enum constant with the specified name
      Throws:
      IllegalArgumentException - if this enum type has no constant with the specified name
      NullPointerException - if the argument is null

    • create

      public abstract org.apache.flink.runtime.io.network.partition.BoundedBlockingSubpartition create(int index, ResultPartition parent, File tempFile, int readBufferSize, boolean sslEnabled) throws IOException
      Creates BoundedBlockingSubpartition of this type.
      Throws:
      IOException