cheap copy dataset from one hdf5 to another

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1

Hi

I need to copy relative big compressed dataset from one hdf5 to another.
Simple straight way is to open source hdf5 file, read dataset, open
target file and write dataset there.

One problem here is that if dataset is compressed, it must be
decompressed when read and compressed again when written.

Is there a way to read and write dataset without
decompression/compression, as a raw blob of data? So, that
decompression/compression can be avoided in my case?

···

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Best regards, Sergey Spiridonov

2

Hi Sergey,

···

On Apr 29, 2010, at 9:07 AM, Sergey Spiridonov wrote:

Hi

I need to copy relative big compressed dataset from one hdf5 to another.
Simple straight way is to open source hdf5 file, read dataset, open
target file and write dataset there.

One problem here is that if dataset is compressed, it must be
decompressed when read and compressed again when written.

Is there a way to read and write dataset without
decompression/compression, as a raw blob of data? So, that
decompression/compression can be avoided in my case?

  Use H5Ocopy() (http://www.hdfgroup.org/HDF5/doc/RM/RM_H5O.html#Object-Copy)

    Quincey