Hi Zach,
On 2/8/07, Zach Deedler <[EMAIL PROTECTED]> wrote:
Anybody know if it is better to page a bunch of little files, or one large
file?
For example,
What would generally be better?
1) 1000 2MB paged files (contained in a 10x10km grid)
2) 50 40MB paged files (contained in a 10x10km grid)
My guess is 1 would be better, but not sure if it loses some optimizations
since the files are separated, and possibly states aren't shared as much.
Probably option 1.x is the best, where x varies between 0 and 1.0 :-)
In general small tiles will work better with paging as there will be
smaller amount of geometry and textures to load per tile. As you
point out the smaller the tile the less sharing you'll be able to
achieve, so clearly there is limit in how small is appropriate.
When osgdem builds database I found that files of 100-200k worked
well. What works best depends on the type of database and how you
navigate around the data.
If you are able to build database building tools that allow you to
adjust the tile size then you'll be able to experiment with different
sizes and find the sweet spot.
Robert.
Robert.
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