Hi Benjamin, A Tuesday 15 December 2009 18:44:19 Benjamin Cilia escrigué: > I compiled pytables pro version 2.1rc2 with hdf5 1.8.4 (1.6 API enabled) > and LZO 2.02. I am running on Linux (RHEL5 64 bit). > > I'm trying using the LZO compression as follows: > > lzo_filter = Filters(complib='lzo', complevel=9, shuffle=True) > > trade_file_name = '%s/%s/%s.trades.hf5' % (opt.out_dir, date[0:4], date) > trade_file = openFile(trade_file_name, 'w') > trade_group = trade_file.createGroup(trade_file.root, "trades") > trade_table = trade_file.createTable(trade_group, 'trades_table', > trade_class, "A trades table", lzo_filter) ... other code to insert into > the table and create indexes ... > trade_file.close() > > > It seems that no matter what I set the 'complevel' parameter to, the file > size is the same and I do not see any significant difference in query > time. I do get a non-fatal error message at the beginning: > > HDF5-DIAG: Error detected in HDF5 (1.8.4) thread 0: > #000: H5Z.c line 273 in H5Zregister(): unable to modify predefined filters > major: Invalid arguments to routine > minor: Bad value > > I suspect that the LZO setting is somehow not working and it is skipping > compression altogether. Why am I getting this error message? How can I > verify if compression is working correctly nor not?
I suppose that you are being bitten by: http://www.pytables.org/trac/ticket/225 You can apply the patch there and recompile. Alternatively, you can use HDF5 1.6.x series which should work fine too. HTH, -- Francesc Alted ------------------------------------------------------------------------------ This SF.Net email is sponsored by the Verizon Developer Community Take advantage of Verizon's best-in-class app development support A streamlined, 14 day to market process makes app distribution fast and easy Join now and get one step closer to millions of Verizon customers http://p.sf.net/sfu/verizon-dev2dev _______________________________________________ Pytables-users mailing list Pytables-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pytables-users
