System Configuration

[Bruce Cheney]

Milo,
 
Thanks for the response.  I understand that the requirements are the
limit and the driving force.  So here is what we are up against and
maybe that will help.
 
We have been given a requirement to support 5000 simultaneous users.
What we are finding is that MapServer bogs down around 400 simultaneous
users on a test machine.  It looks like it is likely slowing because of
the threading issue.  We haven't tested on a production machine but are
estimating that it should support double what are test machine could
handle (double the processor and RAM).  So at least 800 simultaneous
users.  Divide that out with the 5000 and we need a minimum of 6-7 web
servers supporting MapServer.  We will certainly scale this as is needed
but I do need some idea going in as to what is going to be required.
 
Does this sound like results that others expect or is this quantity
above what others have tested?  Also Does anyone know of a solution in
the works to run make mapserver thread safe and/or up the overall speed?
I am not complaining about the speed just wondering what is in the
works.
 
 
Thanks again.
 
Bruce Cheney
Gateway Mapping, Inc
www.gatewaymapping.com <http://www.gatewaymapping.com/> 
801.221.7656
 

________________________________

From: UMN MapServer Users List [mailto:MAPSERVER-USERS at LISTS.UMN.EDU] On
Behalf Of Milo van der Linden
Sent: Wednesday, November 07, 2007 12:02 PM
To: MAPSERVER-USERS at LISTS.UMN.EDU
Subject: Re: [UMN_MAPSERVER-USERS] System Configuration


Hello Bruce,

There is no standard answer to your question. It all depends on personal
or business favour, small issues in maintenance and so.

I for instance tried to host a mapset at hostGIS, but due to a strange
difference in installation with my test server, the datasets turned up
corrupted on linux. I then decided to purchase dedicated windows 2003
hosting and set up a mapserver myself with IIS for future use in
combination with sharpmap ans asp.net.

Our mapserver related business is picking up. 
Our mapserver is currently serving about 1000 map requests per day.
Expectation is that this will reach 5000 within the next month. The main
thing we are currently investigating is setting up tile caching to speed
up request/response.
My guess is that 5 paying customers will turn a profit on the first
dedicated server, currently we have 2. 10 customers may be the limit,
but this is a wild guess.

When we reach 5 paying customers, we will set up the next dedicated
server. This is the approach we are going to take. Loadbalancing is a
webserver related matter. This has nothing to do with mapserver
directly. I have also contacted 52north to set up a secured service for
mapserver. They have succesfull implementations of WSS and WAS on top of
WMS.

So the main question to ask is;
- What do you need right now for the actual demand? I wouldn't worry too
much about growing larger in the future, this issue will solve itself at
that time, look for load balancing when it looks like it might become an
issue. Manage your system(s) with care, watch the stats, watch the
response times per request.

And then decide what to do to keep on track to fullfill demand. This is
an ongoing process.


Bruce Cheney schreef: 

	Hello all.  I am trying to find a typical system configuration
for a mapserver website.  I have looked without any luck (could be I
haven't looked in the correct location).   Can anyone recommend a
typical configuration.  In other words:  do you recommend a load balance
server, # of Application Servers, # of DB servers, etc.  I realize this
may be application specific but some general guidelines would be really
helpful.   For example,  for an application server where MapServer is
the predominant resource user how many concurrent users could it be
expected to handle? 
	 
	Many thanks in advance for any input.
	 
	Bruce Cheney
	Gateway Mapping, Inc
	www.gatewaymapping.com <http://www.gatewaymapping.com/> 
	801.221.7656
	 



-- 



	Milo van der Linden 
skype: milovanderlinden <skype:milovanderlinden?add> 
mlinden at zeelandnet.nl
milovanderlinden at gmail.com
milo at 3dsite.nl
http://www.3dsite.nl


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