THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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TaskManagers, the worker nodes. A TaskManager is (TM) executes many tasks concurrently in threads. Each TM also contains one CommunicationManager (CM - shared between tasks), and one MemoryManager (MM - also shared between tasks). TMs can exchange data with each other via standing TCP connections, which are created when needed.
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