THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
Authors: Yu Li, Pengfei Li
Introduction
CopyOnWriteSkipListStateMap is an implementation of skip list with copy-on-write support. This data structure is used to store state for off-heap/on-disk in SpillableHeapKeyedStateBackend. Like CopyOnWriteStateMap, copy-on-write support makes it possible to snapshot asynchronously.
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