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Re: saving in HDF5 with compression


From: Piotr Majdak
Subject: Re: saving in HDF5 with compression
Date: Thu, 08 Mar 2012 22:03:37 +0100
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:10.0.2) Gecko/20120216 Firefox/10.0.2 SeaMonkey/2.7.2

Jordi Gutiérrez Hermoso wrote:
Moving this discussion to the maintainers' list...


Actually, zipping a HDF5 file would be not a good solution, because
HDF5 already supports compressing of individual variables, including
chunking and shuffling, hence more efficient. All of them is
implemented in the HDF5 library - all we need is to activate it.

Do you know how to do it in Octave?
I don't, but I suspect it's not implemented. The src/*hdf5* files in
the Octave source treeare probably the location to modify if you want
to enable HDF5 compression. Perhaps something else needs to be
modified elsewhere to enable an interface from the interpreter for
compression.

Do you need help getting started reading the Octave sources? This
might help:

    http://hg.savannah.gnu.org/hgweb/octave/file/tip/etc/HACKING



Thanks for the pointer - I'll have a look!

Regards,
Piotr
--
Piotr Majdak
Psychoakustik und Experimentelle Audiologie
Institut für Schallforschung
Österreichische Akademie der Wissenschaften
Wohllebengasse 12-14, 1040 Wien
Tel.: +43 1 51581-2511
Fax: +43 1 51581-2530

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