[mapserver-users] One MapServer-Site more...

[Dave Vieglais]

Does Mapserver retrieve images from the cache when identical requests
are received (within a given period of time)?  If not, then implementing
this along with garbage collection (call it "cache management") could
speed things up a little for some sites and would seem to be a desirable
enhancement.  However, for those of us using a script interface to MS
this functionality is easily implemented with greater flexibility
outside with the scripting language rather than within the MS
executable.

dv.

> -----Original Message-----
> From: owner-mapserver-users at lists.gis.umn.edu [mailto:owner-mapserver-
> users at lists.gis.umn.edu] On Behalf Of Puneet Kishor
> Sent: Monday, December 24, 2001 16:00
> To: 'Stephen Lime'; woodbri at swoodbridge.com; mschulz at webgis.de
> Cc: mapserver-users at lists.gis.umn.edu
> Subject: RE: [mapserver-users] One MapServer-Site more...
> 
> Steve,
> 
> Actually I believe letting Mapserver do garbage collection would be a
very
> good thing. It would not tax the program or the computer one bit,
would
> centralize these temp files (by requiring and instructing the user to
do
> so), and would make things simpler. Yes, Cron is an elegant way of
doing
> things, but not everyone knows how to set up a crontab. It is an
> additional
> step, and is not even available on Windoze unless someone runs a bat
file
> via an at command.
> 
> Anyway, garbage collection is just one of the ways of making the
program
> simpler to install and setup. More on that in another email...
> 
> pk/
> 
> > -----Original Message-----
> > From: Stephen Lime [mailto:steve.lime at dnr.state.mn.us]
> > Sent: Monday, December 24, 2001 9:51 AM
> > To: woodbri at swoodbridge.com; mschulz at webgis.de
> > Cc: mapserver-users at lists.gis.umn.edu
> > Subject: Re: [mapserver-users] One MapServer-Site more...
> >
> >
> > While I imagine mapserver *could* do garbage collection I
> > think that's probably a
> > waste of it's time and would be better handled by cron.
> > Alternatively you can always
> > design applications that require no temporary files at all.
> >
> > Steve
> >
> > Stephen Lime
> > Data & Applications Manager
> >
> > Minnesota DNR
> > 500 Lafayette Road
> > St. Paul, MN 55155
> > 651-297-2937
> >
> > >>> Stephen Woodbridge <woodbri at swoodbridge.com> 12/21/01 07:17AM
>>>
> > Michael Schulz - GIS Bearbeiter wrote:
> >
> > > Yes, this was a no-space-left-problem on our domain. But
> > perhaps someone
> > > can give a hint howto delete the temporary files, without having
the
> > > possibility to install cron-jobs or similiar things because the
ISP
> > > doesn't offer this option. Perhaps it could be done via
> > php, e.g. each
> > > time the init-page gets loaded old temp files are deleted. Hmm,
has
> > > anybody done something similar?
> >
> > phplib has a similar garbage collection problem and they generate a
> > random number, if it is less than X then it does the garbage
> > collection.
> > This allows you to tune how often garbage collection happens so
every
> > hit isn't trying to do it. (ie. if 0 < random <= 1 and X= 0.1 then
> > roughly 1 in 10 hits will do garbage collection).
> >
> > Steve Lime: It would be nice if this feature were added to
> > mapserv such
> > that you could set the percentage and the age in sec/minutes/hours
of
> > the files to be deleted and have mapserver do the garbage
> > collection. If
> > percentage == 0.0 of undefined then no GC is done like now.
> >
> > -Steve
> >