.. _l-onnx-doccom.microsoft-InPlaceAccumulatorV2:

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com.microsoft - InPlaceAccumulatorV2
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.. _l-onnx-opcom-microsoft-inplaceaccumulatorv2-1:

InPlaceAccumulatorV2 - 1 (com.microsoft)
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**Version**

* **name**: `InPlaceAccumulatorV2 (GitHub) <https://github.com/onnx/onnx/blob/main/docs/Operators.md#com.microsoft.InPlaceAccumulatorV2>`_
* **domain**: **com.microsoft**
* **since_version**: **1**
* **function**:
* **support_level**:
* **shape inference**:

This version of the operator has been available
**since version 1 of domain com.microsoft**.

**Summary**

In-place accumulator for tensors. Differs from older op by adding `overwrite_flag` for reset, and making output buffer as optional. Set the `overwrite_flag` to false for gradient accumulation and to True for overwriting the accumulation buffer during gradient computation (equivalent to reset grad + train step)

**Inputs**

Between 2 and 3 inputs.

* **accumulation_buffer** (heterogeneous) - **T**:
  historical result of accumulator
* **value** (heterogeneous) - **T_GRAD**:
  the value that will be added to the accumulator
* **overwrite_flag** (optional, heterogeneous) - **T_BOOL**:
  Indicates if tensor should be overwritten. Default is accumulation

**Outputs**

Between 1 and 2 outputs.

* **updated_flag** (heterogeneous) - **T_BOOL**:
  Whether the update was completed
* **accumulation_buffer_out** (optional, heterogeneous) - **T**:
  updated result of accumulator

**Examples**