Hi Tomas,

On Mon, 14 Jan 2008, Tomas Pospisek ML wrote:
> Being able to write compressed files would make life a lot easier at my
> current contract.
> 
> Is anybody planing to work on this in the near future? 

I'm not aware of.

> How hard in terms of amount of time would it be to implement the feature?

It could be done lighting fast, high quality and extremely cheeply. You can 
choose any two of them :-)

To be more serious, it's not very trivial. To do it reliably, it's really 
not trivial. A robust implementation could take from a few weeks to a few 
months.

> More specifically: if the time saved would exeed the time needed to
> develop the feature I could maybe obtain some funding.

Good thinking. Sponsorship could definitely speedup development and it's 
the fastest way to get something done.
 
> So - is there anybody interested to implement "writing compressed
> files"?

Sure. For about five years, because no major and popular Linux file 
system supports this yet. There are two main benefits: saved space and 
(potentially much) faster I/O. First I commented this issue in 2003:

        http://www.spinics.net/lists/kernel/old/2003-q3/msg11371.html

        "To be faster, one must [...] do less I/O (file/tail packing, 
         compression, etc) and/or optimise seek times."

Much later reiser4 implemented transparent compression and the results are 
indeed enthralling (please ignore the one year old, obsolete, beta ntfs-3g 
results):

        http://linuxhelp.150m.com/resources/fs-benchmarks.htm

Transparent compression isn't implemented yet in NTFS-3G because

        - there was no significant interest
        - we do have lots of requests for other things
        - nobody volunteered
        - nobody sponsored development

Regards,
            Szaka 

--
NTFS-3G:  http://ntfs-3g.org


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