<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type">
</head>
<body bgcolor="#ffffff" text="#000000">
<font size="-1"><font face="Arial">Hi Shawn,<br>
thanks for the answer. Of course I checked if there is not a problem on
the OpenLayers side. I analyzed access log of Apache hosting
TildedCache and there are not duplicit requests (for one map zoom or
drag). Nevertheless I tried the suggested parameter but without any
influence on descripted behaviour. <br>
<br>
Anyway, can somebody explain me how TileCache solves a multithreaded
processing in this case? E.g. GeoWebCache (the similiar tile cache
functionality in J2EE world) uses synchronized section on appropriate
metatile object. But what does TileCache in situation when two requests
on the same metatile are processed at the same time? How it should
avoid the duplicit WMS request generation?<br>
<br>
Regards<br>
Andrew<br>
<br>
</font></font><br>
Shawn Oatley napsal(a):
<blockquote cite="mid:4A76AC3F020000160018B831@nfgw.niagarafalls.ca"
type="cite">
<pre wrap="">Are you using OpenLayers as your WMS client? Perhaps it is OpenLayers requesting the tile multiple times? If you are, try specifying:
OpenLayers.IMAGE_RELOAD_ATTEMPTS = 1;
and see if that changes.
Shawn
</pre>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<pre wrap="">andrew2 <a class="moz-txt-link-rfc2396E" href="mailto:andrew@cmail.cz"><andrew@cmail.cz></a> 08/03/09 6:26 AM >>>
</pre>
</blockquote>
</blockquote>
</blockquote>
<pre wrap=""><!---->
Hi,
I'm facing strange behaviour of TileCache. I defined one WMS layer that uses
metatiling. I do not use seeding and tile requests to uncached tiles are
transformed to standard WMS requests. On my desktop it run's very well, but
when I try it on our server with more CPUs, each WMS request to underlying
WMS server is generated twice. And it is really exactly the same requests
(the same BBOX, the same size of the response).
Isn't it possible that, because of parallel processing, two tile requests
laying in the same metatile are evaluated as uncached? Is there any way how
to control this behaviour?
Thanks for any advice.
Andrew
</pre>
</blockquote>
</body>
</html>