# tf.raw_ops.LMDBDataset

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Creates a dataset that emits the key-value pairs in one or more LMDB files.

#### View aliases


**Compat aliases for migration**

See
[Migration guide](https://www.tensorflow.org/guide/migrate) for
more details.

[`tf.compat.v1.raw_ops.LMDBDataset`](https://www.tensorflow.org/api_docs/python/tf/raw_ops/LMDBDataset)

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    tf.raw_ops.LMDBDataset(
        filenames, output_types, output_shapes, name=None
    )

The Lightning Memory-Mapped Database Manager, or LMDB, is an embedded binary
key-value database. This dataset can read the contents of LMDB database files,
the names of which generally have the `.mdb` suffix.

Each output element consists of a key-value pair represented as a pair of
scalar string `Tensor`s, where the first `Tensor` contains the key and the
second `Tensor` contains the value.

LMDB uses different file formats on big- and little-endian machines.
`LMDBDataset` can only read files in the format of the host machine.

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| ## Args ||
|---|---|
| `filenames` | A `Tensor` of type `string`. A scalar or a vector containing the name(s) of the binary file(s) to be read. |
| `output_types` | A list of `tf.DTypes` that has length `>= 1`. |
| `output_shapes` | A list of shapes (each a [`tf.TensorShape`](https://www.tensorflow.org/versions/r2.13/api_docs/python/tf/TensorShape) or list of `ints`) that has length `>= 1`. |
| `name` | A name for the operation (optional). |

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| ## Returns ||
|---|---|
| A `Tensor` of type `variant`. ||

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