[ka-Map-users] Can someone answer this question please or tellmewho I should ask it to?

[Delfos, Jacob]

Samuel,
 
I didn't mean for you to make the "force_redraw" a permanent
configuration, but just to test whether your site has a problem with
overwiting tiles. Since it doesn't, it must mean there's something wrong
with the reading/comparing of the timestamp.
 
I have just done some testing with the most recent CVS code, and on my
side the redraw mechanism works fine; I used these settings in my
metadata:
 
redraw_interval "60"
tile_source "redraw"
 
After 1 minute, it would redraw, within one minute of the last redraw it
would return the cached tiles. 
 
Please bear in mind that these metadata values MUST be entered into the
FIRST layer of the group. Only metadata from the first layer is used.
 
If you still run into issues, please enter this on line 171 of tile.php,
after " fclose($h) " :
trigger_error("now: ".$now."; timestamp: ".$timestamp.";
interval:".$interval."; meta_timestamp:
".$meta_timestamp,E_USER_WARNING);
 
Let us know what it says. Also, give an example URL of one of your
tiles. In Firefox, use "page -> info", and look under the media tab.
 
regards,
 
Jacob
 
 
 
 
 


________________________________

	From: ka-map-users-bounces at lists.maptools.org
[mailto:ka-map-users-bounces at lists.maptools.org] On Behalf Of Samuel
Doyle
	Sent: 29 July 2006 08:01
	To: Delfos, Jacob
	Cc: ka-map-users at lists.maptools.org
	Subject: RE: [ka-Map-users] Can someone answer this question
please or tellmewho I should ask it to?
	
	
	Hi, 
	I played with the force option in tile.php which appeared to be
very resource intensive. I extended upon this by adding another
'force_redraw' field in the metadata section for each layer of interest
in the map file. This resulted in the desired effect however, it is
still very resource intensive even if I'm requesting just one layer. For
every request my server ends up thrashing like mad. Does anyone have any
insight they could provide?
	
	Thanks, S.D.
	
	"Delfos, Jacob" <Jacob.Delfos at maunsell.com> wrote: 

		Samuel,
		 
		Have you checked whether the URL is actually different?
Are you saying it serves out the same tiles, despite the different
timestamp? Did you check whether any tiles actually get re-written?
		Have you tried playing with the "force" parameter of
tile.php? If this creates a new tile, it means the problem is it decides
it doesn't need to be re-created. If "force" doesn't work, it means it
isn't able to re-create the tiles. 
		Is there a timestamp directory present?
		 
		regards,
		 
		Jacob
		 
		 


________________________________

			From: Samuel Doyle [mailto:sdoyle_2 at yahoo.com] 
			Sent: 28 July 2006 09:31
			To: Delfos, Jacob
			Subject: RE: [ka-Map-users] Can someone answer
this question please or tell mewho I should ask it to?
			
			
			Thanks for the repsonse.
			
			Yes I have included the redraw_interval and have
tried the various combinations even setting tile_source to nocache
setting the redraw_interval to be both greater then and less then the
refresh_inteval even though it looks as if it should be less then what
you set for the refresh_interval. In the end In the end I always end up
needing to delete the tiles directory populated by mapserver in order to
get them regenerated again.
			
			"Delfos, Jacob" <Jacob.Delfos at maunsell.com>
wrote: 

				Samuel,
				 
				Have you looked at the redraw_interval,
described in init.php? That appends a timestamp to the URL of the tile,
to force redrawing of the tiles. refresh-interval only does a
re-request, returning a cached tile.
				 
				regards,
				 
				Jacob
				 


________________________________

				From:
ka-map-users-bounces at lists.maptools.org
[mailto:ka-map-users-bounces at lists.maptools.org] On Behalf Of Samuel
Doyle
				Sent: 28 July 2006 07:33
				To: ka-map-users at lists.maptools.org
				Subject: [ka-Map-users] Can someone
answer this question please or tell mewho I should ask it to?
				
				
				Sorry but I haven't received any answers
for the questions I have posted here but this one is a bit important.
				
				After poking around and guessing at
based on what I noticed in the KaMap code I have place a
refresh_interval value in a metadata section within a layer in my map
file. Now, I can see a periodic update on the map but the problem is
when I have modifed a dbf file under mapserver those changes are not
reflected. So the question is, is there something I need to do special
to get MapServer or KaMap or whatever to detect an update done to a map
so that it is served properly?? These changes to the map files are being
done programatically and not by hand.
				
				Thanks, S.D.
				



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