Andrea,
>>because unlike JAI and JAI ImageIO,
imageio-ext simply does not work without its native counterpart<<
Could you be more explicit by "native counterpart"? Does this mean the
native JAI or the native GDAL? And perhaps why since, "Enquiring minds want
to know".
Thanks!
Roger
On Thu, Feb 3, 2011 at 4:58 PM, Andrea Aime <[email protected]>wrote:
> On Thu, Feb 3, 2011 at 2:08 PM, Roger Bedell <[email protected]>
> wrote:
> > Hi Andrea,
> >
> > So, it kind of looks like there never be a 64 bit JAI (native) for
> Windows.
> >
> > As to a slowdown, it perhaps isn't as much as you say, I did some
> > comparisons with JAI(Native) on and off with Jpeg CMYK encoded Geotiffs,
> and
> > saw about a 20% performance penalty for serving WMS. With 64 bit Java, we
> > can use a whole lot more RAM, which might more than make up the
> difference.
>
> That's less than I measured in the past in fact, I had a slowdown of a
> factor 2
> by not having both JAI native versions around.
> (see this presentation for details:
>
> http://download.osgeo.org/osgeo/foss4g/2009/SPREP/3Fri/Parkside%20Auditorium/1300/fri%20paud%201400%20aime.odp
> )
>
> > So, just to get things straight, do imageio and imageio-ext depend on JAI
> > Native, and JAI Native is only 64 bit on Linux/Solaris?
> >
> > Or, does JAI and ImageIO-Ext exist in the Java version (non-native
> > libraries)? From the JAI docs:
> >
> > "JAI can be run without its native acceleration layer without loss of
> > functionality".
> >
> > Doesn't say anything about ImageIO, or ImageIO-ext. Can these be run
> without
> > native acceleration as well? I know GDAL itself is easy to make 64 bit,
> and
> > wouldn't it do a lot of the work?
>
> In both cases as far as I know you only pay a performance penalty, but
> functionality
> is preserved.
> As I said before, you don't loose functionality by not having JAI and
> JAI ImageIO
> native extensions.
>
> You do lose functionality if you don't have imageio-ext though, by not
> having
> support for a number of raster formats, because unlike JAI and JAI ImageIO,
> imageio-ext simply does not work without its native counterpart
>
> Cheers
> Andrea
>
>
> --
> Ing. Andrea Aime
> Technical Lead
>
> GeoSolutions S.A.S.
> Via Poggio alle Viti 1187
> 55054 Massarosa (LU)
> Italy
>
> phone: +39 0584962313
> fax: +39 0584962313
>
> http://www.geo-solutions.it
> http://geo-solutions.blogspot.com/
> http://www.linkedin.com/in/andreaaime
> http://twitter.com/geowolf
>
> -----------------------------------------------------
>
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