spark-BlockEvictionHandler.adoc

BlockEvictionHandler

BlockEvictionHandler is a contract of FIXME that dropFromMemory.

package org.apache.spark.storage.memory

trait BlockEvictionHandler {
  def dropFromMemory[T: ClassTag](
    blockId: BlockId,
    data: () => Either[Array[T], ChunkedByteBuffer]): StorageLevel
}

Note	BlockEvictionHandler is a private[storage] contract.

Table 1. BlockEvictionHandler Contract

Method	Description
dropFromMemory	Used exclusively when MemoryStore is requested to evictBlocksToFreeSpace.

Note	BlockManager is the one and only known implementation of BlockEvictionHandler Contract in Apache Spark.