30 lines
1.0 KiB
Markdown
30 lines
1.0 KiB
Markdown
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---
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title: Database Layer
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---
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# Database Layer
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* Layer type: `Data`
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* [Doxygen Documentation](http://caffe.berkeleyvision.org/doxygen/classcaffe_1_1DataLayer.html)
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* Header: [`./include/caffe/layers/data_layer.hpp`](https://github.com/BVLC/caffe/blob/master/include/caffe/layers/data_layer.hpp)
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* CPU implementation: [`./src/caffe/layers/data_layer.cpp`](https://github.com/BVLC/caffe/blob/master/src/caffe/layers/data_layer.cpp)
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## Parameters
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* Parameters (`DataParameter data_param`)
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* From [`./src/caffe/proto/caffe.proto`](https://github.com/BVLC/caffe/blob/master/src/caffe/proto/caffe.proto)):
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{% highlight Protobuf %}
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{% include proto/DataParameter.txt %}
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{% endhighlight %}
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* Parameters
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- Required
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- `source`: the name of the directory containing the database
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- `batch_size`: the number of inputs to process at one time
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- Optional
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- `rand_skip`: skip up to this number of inputs at the beginning; useful for asynchronous sgd
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- `backend` [default `LEVELDB`]: choose whether to use a `LEVELDB` or `LMDB`
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