Ed McNierney wrote:
Could you go into a bit more detail about your 4-disk RAID-5 system?
> What kind of controller? What capacity, interface, and rotation
speed are the
> disks?
3Ware 9550X controller.
Four disks, no hotspare: 4 spindles at work.
Western Digital, SATA-2, 7500 rpm, 500 GB apiece.
I am quite surprised by the lack of performance increase even in a 2 GB
file, due to overviews and/or tiling.
My only supposition is that the RAID is so fast that these performance
enhancers don't make a difference, and I say that with tongue in cheek.
I'll grab MS4W and repeat the experiment on my single-core single-disk
Pentium-4 desktop machine.
--
Gregor Mosheh / Greg Allensworth
System Administrator, HostGIS cartographic development & hosting services
http://www.HostGIS.com/
"Remember that no one cares if you can back up,
only if you can restore." - AMANDA
