New mapping application

[John Frank]

JF-

Does mapserver use all the RAM?  "100 concurrent clients" means its
working on 100 maps simultaneously, right?  With 100 maps rendering at any
moment, I think that would be about 420MB.

Is your "Quad 400" a four-processor machine with 400MHz Athlons?  Or
something else with a smaller cache?

What is the bottleneck that increases the map delivery speed to 5-7
seconds?  Is it processor limited?

John







On Mon, 27 Nov 2000, Doyon, Jean-Francois wrote:

> actually the tool will remain available in the future, we've got it , might
> as well use it :)
> 
> Yes, I hope so too, I'm not too worried though, things don't work quite the
> same here, and
> we're not stuck with only two choices :)
> 
> As for the load testing:
> 
> On a Quad 400 with 512MB RAM and a RAID 0 Storage Sub-System, I got up to
> 250 maps/minute with 100 concurrent clients pouding the box, generating maps
> continuously. I was VERY happy with that result :) This was using the
> Election Interface/Map you've seen. There was no randomizing (Allways the
> default, full extent map, which basically is the worst case scenario). Under
> this load the map took about 5-7 seconds to show up.
> 
> The mapscript versions worked well also. I don't have a number of maps on
> that, but I do know every once in a while an Apache child would bomb with a
> sig11 (tail -f'ing the error log). I suppose this is a SWIG thing ... Both
> Perl and PHP did this. I can't really compare to the CGI since they were
> different boxes.
> 
> The server is RH 7.0 with the CVS mapserver.
> 
> I was using Apache's JMeter to create the load, very cool tool.
> (http://java.apache.org/jmeter)
> 
> Overall the CGI version gets my thumbs up, wayyyyyyy up. Another tool we
> use, died at 20 maps/minute on a dual 400 under NT4. Open Source wins yet
> again :)
> 
> Sorry if this all seems add-hoc. The intent was never to do a truly
> disciplined benchmark, just to get an idea of perfromance and stability
> under load. Maybe I'll do somehting with a more "scientific" approach
> someday. Although if anybody out there cares, just get the tool I
> mentionned, makes the testing real easy :)
> 
> Cheers,
> J.F.
> 
> > ----------
> > From: 	Stephen Lime[SMTP:steve.lime at dnr.state.mn.us]
> > Sent: 	Monday, November 27, 2000 4:23 PM
> > To: 	Jean-Francois.Doyon at CCRS.NRCan.gc.ca;
> > 'mapserver-users at lists.gis.umn.edu'
> > Subject: 	Re: New mapping application
> > 
> > Sweet. Hopefully your elections will go smoother than in the states. ;-) I
> > really like
> > the application in general- election results. I assume this will have a
> > limited shelf so
> > it's not worth adding to the demo page.
> > 
> > I know you were doing some stress testing. How'd that come out?
> > 
> > Steve
> > 
> > Yes, the URL parameter switching is real handy. Use it all the time
> > myself.
> > 
> > Stephen Lime
> > Internet Applications Analyst
> > 
> > Minnesota DNR
> > 500 Lafayette Road
> > St. Paul, MN 55155
> > 651-297-2937
> > 
> > >>> "Doyon, Jean-Francois" <Jean-Francois.Doyon at CCRS.NRCan.gc.ca> 11/27/00
> > 11:24AM >>>
> > Goodday,
> > 
> > I just wanted to give everyone a heads-up.
> > 
> > I've implemented a new mapping interface using Mapserver CGI to provide
> > live
> > up to the minute mapping of our federal election results as they come in.
> > (Canadian Federal Election).
> > 
> > You will be able to find a link here:
> > 
> > http://atlas.gc.ca/english/facts/elections/elections2000/index.htm 
> > 
> > Click on Election 2000 Mapping.
> > 
> > There currently are only Screen-Shots, the interface will go live sometime
> > this afternoon, with data showing up sometime shortly after 10pm EST.
> > 
> > Feedback is most welcome of course !
> > 
> > Sorry I've been so quiet lately, been working on this non-stop for a
> > while.
> > 
> > Hopefully I'll get back into the swing of things soon now (Such as the
> > documentation project).
> > 
> > And Stephen, that thing where you can set almost any Mapfile paramter with
> > a
> > structured URL parameter (map_layer_???) is very handy :)
> > Great for implementing bi-lingual interfaces.
> > 
> > Cheers,
> > 
> > 
> > Jean-Francois Doyon
> > Internet Service Development and Systems Support
> > GeoAccess Division
> > Natural Resources Canada
> > http://atlas.gc.ca 
> > (613) 992-4902
> > 
> > 
>