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Add warning about pip h5py #217

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Feb 17, 2022
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Add warning about pip h5py #217

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6 changes: 6 additions & 0 deletions README.md
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Expand Up @@ -56,6 +56,12 @@ help(SliceDataset)
If you encounter an issue, the best first thing to do is to try to match the
test environments in `requirements.txt` and `dev-requirements.txt`.

**Note:** As documented in [Issue 215](https://github.com/facebookresearch/fastMRI/issues/215),
there is currently a memory leak when using `h5py` installed from `pip` and
converting to a `torch.Tensor`. To avoid the leak, you need to use `h5py` with
a version of HDF5 before 1.12.1. As of February 16, 2022, the `conda` version
of `h5py` 3.6.0 used HDF5 1.10.6, which avoids the leak.

First install PyTorch according to the directions at the
[PyTorch Website](https://pytorch.org/get-started/) for your operating system
and CUDA setup. Then, run
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