Hi Vesa,
On Aug 18, 2010, at 4:46 AM, Vesa Paatero wrote:
> Hello,
>
> At least some versions of HDFView worked so that they opened .h5 data files
> in read-write mode and, when closing, re-wrote the headers(?) of the data
> file even though the user thought that no changes were needed. That could
> cause data loss if the format of the datafile was not interpreted correctly
> in the first place.
>
> My question is: How does the read-write mode behave, nowadays, in terms of
> re-writing things or leaving them intact? When closing a file opened in
> read-write mode, does the HDF5 library write something only when there are
> changes or does it always re-write headers?
The behavior you describe was a bug that we fixed in the 1.8.3 (or
maybe 1.8.2?) release, and the library now only writes to the file when
something has changed.
Quincey
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