Package org.apache.hadoop.fs.impl.prefetch

Interface PrefetchingStatistics

All Superinterfaces:
IOStatisticsSource
All Known Implementing Classes:
EmptyPrefetchingStatistics
public interface PrefetchingStatistics extends IOStatisticsSource

  • Method Details

    • prefetchOperationStarted

      DurationTracker prefetchOperationStarted()
      A prefetch operation has started.
      Returns:
      duration tracker

    • blockAddedToFileCache

      void blockAddedToFileCache()
      A block has been saved to the file cache.

    • blockRemovedFromFileCache

      void blockRemovedFromFileCache()
      A block has been removed from the file cache.

    • blockEvictedFromFileCache

      void blockEvictedFromFileCache()
      A block has been evicted from the file cache.

    • prefetchOperationCompleted

      void prefetchOperationCompleted()
      A prefetch operation has completed.

    • executorAcquired

      void executorAcquired(Duration timeInQueue)
      An executor has been acquired, either for prefetching or caching.
      Parameters:
      timeInQueue - time taken to acquire an executor.

    • memoryAllocated

      void memoryAllocated(int size)
      A new buffer has been added to the buffer pool.
      Parameters:
      size - size of the new buffer

    • memoryFreed

      void memoryFreed(int size)
      Previously allocated memory has been freed.
      Parameters:
      size - size of memory freed.