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Commits on Jan 13, 2021

• PSv2: Merge cluster_coordinator_mpr_test into fault_tolerance_test: step 2: verify that scheduling and joining raises errors at ps' failure.

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Commits on Jan 7, 2021

• PSv2: Merge cluster_coordinator_mpr_test into fault_tolerance_test: step 1, adding SingleWorkerFaultToleranceTest for single worker fault tolerance cases.

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Commits on Dec 21, 2020

• Add a note saying callbacks.configure_callbacks is only used in TF1.

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Commits on Dec 18, 2020

• PSv2: Privatize ClusterCoordinator.cluster attribute since Cluster is not meant for public use.

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Commits on Dec 2, 2020

• KPL: In index_lookup, avoid checking whether vocabulary is set for INT output_mode for backward-compatibility. We should use a tensor for the table size.

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Commits on Dec 1, 2020

• Disabling CollectiveOpsTest.AllReduce_NcclChannelCaching as it's timing out on guitar.

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• PSv2: Typo fix in fault_tolerance_test.py

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Commits on Nov 25, 2020

• PSv2: Add checks that ParameterServerStrategy's run, reduce, experimental_distribute_dataset, and distribute_datasets_from_function are used with a ClusterCoordinator, and that run an…

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• PSv2: Revert _tensor naming to _value as it's not necessarily tensors.

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Commits on Nov 24, 2020

• PSv2: Add the test fault_tolerance_test.testNumpyFetchedAfterWorkerFailure.

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Commits on Nov 21, 2020

• PSv2: Cache the numpy result so the RemoteValue doesn't risk performing a tensor copy when a worker has become unavailable.

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Commits on Nov 11, 2020

• PSv2: Check that there is no more than one chief, and at least one ps/worker. Combine the validation logic with multi_worker_util.

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Commits on Nov 8, 2020

• PSv2: Only allow function scheduled to be a tf.function or concrete function.

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Commits on Nov 6, 2020

• PSv2: Task type check for cluster_resolver.task_type and tasks in cluster spec, and raise error if disallowed is found.

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Commits on Nov 5, 2020

• PSv2: Only instantiate monitoring.ExponentialBuckets if enable_metrics is True.

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• PSv2: Make it explicitly in the docstring that "chief", "worker", and "ps" task type naming should be used.

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Commits on Oct 31, 2020

• Multi-worker tutorial: Add the workflow of MWMS+CTL example that is going to be added in the tutorial in multi_worker_tutorial_test.

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Commits on Oct 30, 2020

• PSv2: Docstring minor rephrase and typo/example corrections.

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Commits on Oct 29, 2020

• SidecarEvaluator: Create a Keras SidecarEvaluator API for a dedicated evaluator task.

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Commits on Oct 28, 2020

• Keras Fixit: Copy the util is_oss into multi_worker_callback_tf2_test.

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• Keras Fixit: Remove usage of parameter_server_strategy.ParameterServerStrategyExtended in Keras.

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• PSv2: Update in keras training_v1 message regarding TF2 ParameterServerStrategy support.

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Commits on Oct 26, 2020

• MultiProcessPoolRunner: Comment correction as we're longer using atexit. Upon testing it seems we don't need _shutdown_all_pool_runners at the end of _pool_runner_worker either now.

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Commits on Oct 23, 2020

• Align docstring indentation in init_ops_v2.

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• Typo fix in distribute_lib.

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Commits on Oct 22, 2020

• PSv2: Provide a default single-replica strategy.reduce() implementation and add a test.

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Commits on Oct 21, 2020

• PSv2: Change schedule API so that it always returns one RemoteValue. Calling fetch on it returns the structure of numpy() result.

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• PSv2: Dedup the legacy ParameterServerStrategy class (as the estimator usage of it uses ParameterServerStrategyV1).

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• PSv2: Add fault tolerance tests using MultiProcessRunner in OSS.

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Commits on Oct 20, 2020

• PSv2: Export a few tf.distribute symbols related to TF2 parameter server training.

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Commits on Oct 19, 2020

• MultiProcessRunner: Disable MPR on python 3.8 + Linux case.

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• PSv2: Remove ParameterServerFailureError now that parameter server failures are coming back from runtime as UnavailableError.

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Commits on Oct 16, 2020

• MultiProcessRunner: Add a convenient _is_enabled() function in multi_process_lib.

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• MultiProcessRunner: Skips the tests that timeout on oss.

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Commits on Oct 15, 2020

• MultiProcessRunner: Open source multi_process_runner with a OSS backend.

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