我有一个大约 1.85 GB 的数据集，其中包含 h5 文件，我需要使用 hadoop 处理这些文件，为此我可能需要将这些文件转换为文本或 csv。hadoop 有什么方法可以读取 h5 文件吗？或者有什么好的在线工具可以将 h5 文件转换为 csv 或文本文件？或者任何人都可以提供一个链接，我可以在其中下载包含文本或 csv 文件的巨大数据集？
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Have you tried OPeNDAP Hyrax server with hdf5_handler module?
For example, from the sample HDF5 file [1], you can get the following ASCII data [2]:
Dataset: grid_1_2d.h5
temperature[0], 10, 10, 10, 10, 10, 10, 10, 10
temperature[1], 11, 11, 11, 11, 11, 11, 11, 11
temperature[2], 12, 12, 12, 12, 12, 12, 12, 12
temperature[3], 13, 13, 13, 13, 13, 13, 13, 13
...
OPeNDAP Hyrax server with hdf5_handler is a great tool/service because you can select (and subset) a dataset from an HDF5 file easily using HTML form as well [3]. You can find the detailed information about OPeNDAP hdf5_handler from [4].
[1] http://eosdap.hdfgroup.org:8080/opendap/data/hdf5/grid_1_2d.h5
[2] http://eosdap.hdfgroup.org:8080/opendap/data/hdf5/grid_1_2d.h5.ascii
[3] http://eosdap.hdfgroup.org:8080/opendap/data/hdf5/grid_1_2d.h5.html
于 2014-06-18T20:13:01.043 回答