[Pytables-users] nctoh5 with lzo compression

[<fri...@am...>]

Thank you for optimizing the nctoh5 script! 

I have two questions concerning compression: 

1) The effect of zlib-compression
---------------------------------
Tests are made with a 30 MB nc-file resulting in h5 files of

156 MB without any compression
 16 MB with zlib compression level 9

...but using external zip or lzo program it results in approx.
  2 MB

(I get nearly the same result when I compress the original nc file.)

Is there a chance to get smaller h5 files out of nctoh5.py ?

2) internal lzo compression
---------------------------
I placed lzo.dll resp. lzo1.dll in ~system32 directory where zlib.dll and msvcrt.dll live too.
But I get a UserWarning from Leaf.py line 90: lzo compression library is not available...

What I have to do?

Thanks in advance,
Friedemann Gehrt