Package org.rocksdb

Interface MutableColumnFamilyOptionsInterface<T extends MutableColumnFamilyOptionsInterface<T>>

All Superinterfaces:
AdvancedMutableColumnFamilyOptionsInterface<T>
All Known Implementing Classes:
ColumnFamilyOptions, MutableColumnFamilyOptions.MutableColumnFamilyOptionsBuilder, Options
public interface MutableColumnFamilyOptionsInterface<T extends MutableColumnFamilyOptionsInterface<T>> extends AdvancedMutableColumnFamilyOptionsInterface<T>

  • Method Details

    • setWriteBufferSize

      T setWriteBufferSize(long writeBufferSize)
      Amount of data to build up in memory (backed by an unsorted log on disk) before converting to a sorted on-disk file.

      Larger values increase performance, especially during bulk loads. Up to max_write_buffer_number write buffers may be held in memory at the same time, so you may wish to adjust this parameter to control memory usage.

      Also, a larger write buffer will result in a longer recovery time the next time the database is opened.

      Default: 64MB

      Parameters:
      writeBufferSize - the size of write buffer.
      Returns:
      the instance of the current object.
      Throws:
      IllegalArgumentException - thrown on 32-Bit platforms while overflowing the underlying platform specific value.

    • writeBufferSize

      long writeBufferSize()
      Return size of write buffer size.
      Returns:
      size of write buffer.
      See Also:

    • setDisableAutoCompactions

      T setDisableAutoCompactions(boolean disableAutoCompactions)
      Disable automatic compactions. Manual compactions can still be issued on this column family
      Parameters:
      disableAutoCompactions - true if auto-compactions are disabled.
      Returns:
      the reference to the current option.

    • disableAutoCompactions

      boolean disableAutoCompactions()
      Disable automatic compactions. Manual compactions can still be issued on this column family
      Returns:
      true if auto-compactions are disabled.

    • setLevel0FileNumCompactionTrigger

      T setLevel0FileNumCompactionTrigger(int level0FileNumCompactionTrigger)
      Number of files to trigger level-0 compaction. A value < 0 means that level-0 compaction will not be triggered by number of files at all.

      Default: 4

      Parameters:
      level0FileNumCompactionTrigger - The number of files to trigger level-0 compaction
      Returns:
      the reference to the current option.

    • level0FileNumCompactionTrigger

      int level0FileNumCompactionTrigger()
      Number of files to trigger level-0 compaction. A value < 0 means that level-0 compaction will not be triggered by number of files at all.

      Default: 4

      Returns:
      The number of files to trigger

    • setMaxCompactionBytes

      T setMaxCompactionBytes(long maxCompactionBytes)
      We try to limit number of bytes in one compaction to be lower than this threshold. But it's not guaranteed. Value 0 will be sanitized.
      Parameters:
      maxCompactionBytes - max bytes in a compaction
      Returns:
      the reference to the current option.
      See Also:

    • maxCompactionBytes

      long maxCompactionBytes()
      We try to limit number of bytes in one compaction to be lower than this threshold. But it's not guaranteed. Value 0 will be sanitized.
      Returns:
      the maximum number of bytes in for a compaction.
      See Also:

    • setMaxBytesForLevelBase

      T setMaxBytesForLevelBase(long maxBytesForLevelBase)
      The upper-bound of the total size of level-1 files in bytes. Maximum number of bytes for level L can be calculated as (maxBytesForLevelBase) * (maxBytesForLevelMultiplier ^ (L-1)) For example, if maxBytesForLevelBase is 20MB, and if max_bytes_for_level_multiplier is 10, total data size for level-1 will be 200MB, total file size for level-2 will be 2GB, and total file size for level-3 will be 20GB. by default 'maxBytesForLevelBase' is 256MB.
      Parameters:
      maxBytesForLevelBase - maximum bytes for level base.
      Returns:
      the reference to the current option.

      See AdvancedMutableColumnFamilyOptionsInterface.setMaxBytesForLevelMultiplier(double)

    • maxBytesForLevelBase

      long maxBytesForLevelBase()
      The upper-bound of the total size of level-1 files in bytes. Maximum number of bytes for level L can be calculated as (maxBytesForLevelBase) * (maxBytesForLevelMultiplier ^ (L-1)) For example, if maxBytesForLevelBase is 20MB, and if max_bytes_for_level_multiplier is 10, total data size for level-1 will be 200MB, total file size for level-2 will be 2GB, and total file size for level-3 will be 20GB. by default 'maxBytesForLevelBase' is 256MB.
      Returns:
      the upper-bound of the total size of level-1 files in bytes.

      See AdvancedMutableColumnFamilyOptionsInterface.maxBytesForLevelMultiplier()

    • setCompressionType

      T setCompressionType(CompressionType compressionType)
      Compress blocks using the specified compression algorithm. This parameter can be changed dynamically.

      Default: SNAPPY_COMPRESSION, which gives lightweight but fast compression.

      Parameters:
      compressionType - Compression Type.
      Returns:
      the reference to the current option.

    • compressionType

      CompressionType compressionType()
      Compress blocks using the specified compression algorithm. This parameter can be changed dynamically.

      Default: SNAPPY_COMPRESSION, which gives lightweight but fast compression.

      Returns:
      Compression type.