Package org.apache.cassandra.io.util

Interface DiskOptimizationStrategy

All Known Implementing Classes:
SpinningDiskOptimizationStrategy, SsdDiskOptimizationStrategy
public interface DiskOptimizationStrategy

  • Field Details

  • Method Details

    • bufferSize

      int bufferSize(long recordSize)
      Parameters:
      recordSize - record size
      Returns:
      the buffer size for a given record size.

    • roundBufferSize

      default int roundBufferSize(long size)
      Round up to the next multiple of 4k but no more than MAX_BUFFER_SIZE.

    • roundForCaching

      static int roundForCaching(int size, boolean roundUp)
      Round either up or down to the next power of two, which is required by the ChunkCache.CachingRebufferer, but capping between MIN_BUFFER_SIZE and MAX_BUFFER_SIZE.
      Parameters:
      size - - the size to round to a power of two, normally this is a buffer size that was previously returned by a bufferSize(long).
      roundUp - - whether to round up or down
      Returns:
      a value rounded to a power of two but never bigger than MAX_BUFFER_SIZE or smaller than MIN_BUFFER_SIZE.