[ka-Map-users] Hardware requirements for Ka-Map site

[Paul Spencer]

Mike,

this is a huge can of worms :)

Our maps.dmsolutions.ca server is running a stock intel pc around 3 GHz, 
200GB 7200 rpm HD, and a gig or so of ram (maybe more?) with redhat 
linux.  Nothing particularly fancy, but reasonably big bandwidth pipe. 
This suits our needs but is not really suitable for any serious amount 
of traffic (the immediate response from our release peaked the load on 
the server quite a bit)

There are several factors to consider:

disk space - tile caching requirements are based on the extents and 
scales you will use with your maps, multipled by the number of layers to 
serve separately - someone figured out that to cache all tiles at all 
scales for continental US (google) was about 21 TB.

This is obviously not practical for most of us, so the tile caching 
would need to be dynamic and reasonably fast ... and clean up after 
itself (current version doesn't do that).

bandwidth - ka-Map is optimized to put images on the client and leave 
them there, but its a big hit the first visit

processor - currently, every move causes an update to the keymap plus 
additional tiles ... and when the tiles aren't available, that becomes a 
real map draw somewhere ... we figure that we can serve about 3000 users 
an hour on our current setup but that would be pushing the processor ...

it really comes down to how you are planning to use it, the amount of 
performance you need out of it, number of users etc

Hope this helps ...

Paul

Mike Davis wrote:
> As I attempt to install the Ka-Map demo on our test server (Crazy Army
> WinXP/IIS box... ugh) I am constantly amazed at the speed the maps run
> at.  I realize much of this has to do with eliminating many of the
> interface bottlenecks of other mapserver interfaces, but I am
> wondering what server set-ups people are using for their Ka-Maps
> sites.
> 
> Specifically, what hardware set-up is DM Solutions using for their test server?
> 
> Also Gregg, what type of server are you using for www.coloradohikers.com?
> 
> Basically, I am trying to gauge weather or not to start gunning for an
> additional server just for Ka-Map based sites, or if I can piggyback
> them on our existing server.
> 
> 
> Thanks for your help,
> 
> -Mike
> 
> _______________________________________________
> ka-Map-users mailing list
> ka-Map-users at lists.maptools.org
> http://lists.maptools.org/mailman/listinfo/ka-map-users
> 

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|Paul Spencer                           pspencer at dmsolutions.ca   |
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|Applications & Software Development                              |
|DM Solutions Group Inc                 http://www.dmsolutions.ca/|
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