[Pytables-users] compression in 0.9

[Jeffrey S W. <Jef...@no...>]

Hi:

I just noticed that compression doesn't seem to be working right (for me 
at least) in 0.9.  Here's an example:

with pytables 0.9

[mac28:~/python] jsw% nctoh5 --complevel=6 -o test.nc test.h5

[mac28:~/python] jsw% ls -l test.nc test.h5
-rw-r--r--  1 jsw  jsw  12089048  9 Nov 08:59 test.h5
-rw-r--r--  1 jsw  jsw  26355656  4 Nov 17:10 test.nc

with pytables 0.8.1

[mac28:~/python] jsw% ls -l test.nc test.h5
-rw-r--r--  1 jsw  jsw   5344279  9 Nov 09:00 test.h5
-rw-r--r--  1 jsw  jsw  26355656  4 Nov 17:10 test.nc

No matter what netcdf file I use as input, the resulting h5 file is 
about twice as large using 0.9 as it is in 0.8.1.

BTW:  the test.nc file I used here can be found at 
ftp://ftp.cdc.noaa.gov/Public/jsw.


-Jeff

-- 
Jeffrey S. Whitaker         Phone  : (303)497-6313
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