Chunking in Opaque datasets

Hi all,

I'm having some trouble dealing with chunking in opaque datasets. The
situation is the following:

- I have an opaque dataset that will be arround 50MB
- I must compress this dataset (using HDF5).

What I'm trying to do is set up chunks arround 1-10MB. My questions are:

- How is the chunking in opaque datasets defined? Bytes?
- What is the maximum number of chunks?
- Which is the correct way of defining a chunked opaque dataset?


Here is an extract (ommited some definitions for clarity) of the code:


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