Quoting "Mitchell, Scott - IS" <[email protected]>:

Is there any guidance, rule of thumb, whatever on what compression level to use? I haven't been able to find much detail; apart from 0 being no compression and 9 being maximum. Is there a good balance in the range 1-9?

Is the selection as much about balancing processor vs. disk load as final size?

If I can speed writes with some lossless compression, that would be a good thing.



Scott, the level to choose will probably depend on the data you're compressing.

You might also want to look at the LZF compression filter (http://h5py.alfven.org/lzf/). For the data I'm processing, it's been significantly faster than zlib.

-Steve

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