[mapserver-users] How to make MapServer WMS super fast?
Léveillé, James
James.Leveille at mtq.gouv.qc.ca
Fri Dec 12 08:00:08 PST 2008
Here is a message published by Alexandre Dubé a few weeks ago - helpfull
Here's how to install and setup fastCGI with Apache 2.2.8 contained in
the MS4W 2.2.7 version.
1- MS4W 2.2.7 contains a MapServer compiled to support FastCGI so
nothing needs to be done there.
2- But, Apache 2.2.8 that comes with MS4W 2.2.7 doesn't include the
mod_fcgi module. This module can be dowloaded at
http://www.apachelounge.com/download/
<http://www.apachelounge.com/download/> ... Take the
mod_fcgid-2.2a-w32.zip which will work with Apache 2.2.8.
3- Copy mod_fcgid.so to your apache/modules folder
4- Install the Visual C++ 2008 Redistributable Package (the binary is
build with VC 2008). Download and install, if it isn't already done,
from:
www.microsoft.com/downloads/details.aspx?FamilyID=9B2DA534-3E03-4391-8A4D-07
4B9F2BC1BF&displaylang=en
<outbind://14/www.microsoft.com/downloads/details.aspx?FamilyID=9B2DA534-3E0
3-4391-8A4D-074B9F2BC1BF&displaylang=en>
5- Modify your /ms4w/Apache/conf/httpd.conf
a) Add :
LoadModule fcgid_module modules/mod_fcgid.so
b) Add :
ScriptAlias /cgi-bin/ "/ms4w/Apache/cgi-bin/"
ScriptAlias /fcgi-bin/ "/ms4w/Apache/cgi-bin/"
c) Remove :
<Directory "/ms4w/Apache/cgi-bin">
AllowOverride All
Options None
Order allow,deny
Allow from all
</Directory>
d) Add :
<Location "/cgi-bin">
Options None
Order allow,deny
Allow from all
</Location>
e) Add :
<Location "/fcgi-bin">
# The following line activates the fastCGI script to all files
in location
SetHandler fcgid-script
Options None
Order allow,deny
Allow from all
</Location>
f) Add :
<IfModule fcgid_module>
IPCCommTimeout 60
IdleTimeout 60
DefaultMinClassProcessCount 2
DefaultMaxClassProcessCount 20
DefaultInitEnv PROJ_LIB "c:/ms4w/proj/nad/"
DefaultInitEnv PATH
"c:/ms4w/Apache/cgi-bin;c:/WINDOWS/system32;c:/WINDOWS;c:/WINDOWS/System32/W
bem;"
DefaultInitEnv windir "c:/WINDOWS"
DefaultInitEnv SystemRoot "c:/WINDOWS"
DefaultInitEnv SystemDrive "c:"
DefaultInitEnv GDAL_DATA "c:/ms4w/gdaldata"
DefaultInitEnv GDAL_DRIVER_PATH "c:/ms4w/gdalplugins"
DefaultInitEnv TMP "c:/ms4w/tmp"
DefaultInitEnv TEMP "c:/ms4w/tmp"
</IfModule>
6- Restart Apache : /ms4w/apache-restart.bat
7- In your mapfile, set a PROCESSING directive to tell FastCGI to cache
the connections and layer information on all layers for which connection
caching is desired - ie. all slow layers.
a) Add :
PROCESSING "CLOSE_CONNECTION=DEFER"
8- Now you can load your map using either normal CGI or FastCGI :
a) CGI :
http://host:port/cgi-bin/mapserv.exe <http://host:port/cgi-bin/mapserv.exe>
?...
b) fastCGI :
http://host:port/fcgi-bin/mapserv.exe
<http://host:port/fcgi-bin/mapserv.exe> ?...
That way, your original cgi-bin folder wont be affected by fastCGI
unless you use the modified url with "fcti-bin" which is the alias you
added to your httpd.conf file at 5b).
Special thanks to Jeff McKenna and Daniel Morissette who helped me a lot
with this.
______________________________________________________
JAMES LÉVEILLÉ
Service des systèmes de Mission
Direction des technologies de l'information
Ministère des Transports du Québec
5833, boul. Pierre-Bertrand, 2ième étage
Québec (Québec) G2K 1K7
Téléphone: (418) 380-2005 poste 227
Télécopieur: (418) 644-6653
james.leveille at mtq.gouv.qc.ca <mailto:james.leveille at mtq.gouv.qc.ca>
-----Message d'origine-----
De : mapserver-users-bounces at lists.osgeo.org
[mailto:mapserver-users-bounces at lists.osgeo.org] De la part de Rahkonen
Jukka
Envoyé : 12 décembre 2008 10:39
À : Marcelo Oliveira; mapserver-users at lists.osgeo.org
Objet : Re: [mapserver-users] How to make MapServer WMS super fast?
Hi,
Thanks, I will try Fast CGI. Are there some simple enough document
for a ms4w users about how to turn the system to use Fast CGI?
-Jukka-
________________________________
Lähettäjä: Marcelo Oliveira [mailto:moliveira at GEOSTATS.com]
Lähetetty: 12. joulukuuta 2008 17:05
Vastaanottaja: Rahkonen Jukka;
mapserver-users at lists.osgeo.org
Aihe: RE: [mapserver-users] How to make MapServer WMS super
fast?
Try using Fast CGI, it should improve your latency problem
you are seeing. It is also possible that using other raster formats could
help.
Good luck! M
--------------
Marcelo Simas Oliveira
GeoStats LP
530 Means St., Ste. 310
Atlanta, Georgia 30318
(404) 588-1004
www.geostats.com
From: mapserver-users-bounces at lists.osgeo.org
[mailto:mapserver-users-bounces at lists.osgeo.org] On Behalf Of Rahkonen Jukka
Sent: Friday, December 12, 2008 10:01 AM
To: mapserver-users at lists.osgeo.org
Subject: [mapserver-users] How to make MapServer WMS super
fast?
Hi,
Are there any effective tricks for making MapServer to
Top-Fuel class? We have now a typical ms4w installation on a rather good
server platform with SCSI drives and 2 four-core processors running on
Windows 2003 server. Our images are tiled, uncompressed geotiffs with
overviews, vector sample data set is shapefile with shptree index. I have a
shortened epsg file and my mapfile is extra short. Bandwith is not the
limit. We are getting out now about 450 orthoimage pictures per minute (size
500 by 500 pixels) and 550 pictures from the vector layer in png24 image
format. I consider that rather good, but we are required to reach 20 images
per second, thus 1200 images per minute or 0.05 seconds per image. I wonder
if anybody has tuned MapServer that far.
I am willing to try however exotic solutions to reach the 20
WMS output images/second goal if somebody could suggest me what to try next.
In our system there seems to be about 0.1 second ballast with WMS getMap
requests and I cannot get any faster response even if I try with on empty
data layer with nothing to render. Have anybody tried to keep mapfile,
epsg-file or even tileindex files in RAM drive?
Having about 20 parallel users seems to be optimal for our
server and if I drive just WMS getCapabilities request against my mapfile I
can get about 1300 responses per minute. That leads me to think that 1200
rendered images per minute might be possible to reach with optimal set-up.
-Jukka Rahkonen-
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