Hi Gabriel,
On Jun 9, 2010, at 5:41 AM, Gabriel Corneanu wrote:
> Thanks for the reply... I was afraid of that answer.
> As I said, I do NOT want concurrent write; that's definitely much more
> complex.
Yes, that's definitely a lot more complex than SWMR access.
> I remember I read something about cache settings, but no clear statements.
> How is NetCDF doing it??
I think the netCDF information you sent was about cases where the
netCDF-3 file format was being used, not HDF5.
> Making a COPY is definitely not an option... Isn't it possible to
> solve it by synchronizing the metadata access?
Yes, here's the link in our FAQ for how to do this:
http://www.hdfgroup.org/hdf5-quest.html#grdwt
> Is there any time estimation for the "single-writer/multiple-reader" feature?
It will probably be available for beta testing toward the end of the
year.
> Or, is using shared cache (H5Freopen) safe? I would build a "data
> reader" thread in the writer process; is this a viable solution??
As long as you are accessing the file with the same process (i.e.
multiple threads within a process), you are fine and you don't need to take any
special actions. It's only when writing with one process and reading with
another that there are issues.
Quincey
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