Paul,

as far as I see your data are static. You will not need them once you have
created the tiles.
My experience is that databases require 4 -10 times more time to render a
layer than local shape files.
PostGIS is among the faster DBs and would be at the lower end of the 4 - 10,
but not that fast that it could compete with shapes.

If your region of interest isn't that big you shouldn't run into problems
with space for the shape files.

However, I would approach it the other way round: pixel size at the lowest
scale is x.x mm a 256*256 tile covers thus y.y square metres which means you
need z.z million of tiles for your bounding box, double that for all scales
and that is the number you need to cut. A day has 86400 seconds and to get
it done in x time you would need x tiles per second, which would be your
target. Then cut the first ten levels and have a look. Or if you have it as
one job in geowebcache, you will get a rough estimate about the tile number
to be cut. If you can afford the time with a database then do it if not then
use the shapes. 

Between the table and the view I would expect only marginal differences.

Cheers

Christian






-----
____________________________

Dr Christian Maul
Project Manager

Information Services Branch
Department of Sustainability and Environment
Level13, Marland House, 570 Bourke Street
Melbourne 3000

PO Box 500, East Melbourne Vic 3002


Telephone:        +61-3-8636 2325
Telefax:              +61-3-8636 2813
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