[ka-Map-users] ka-map with PHP as a CGI vs. DSO?

[Stephen Woodbridge]

Paul,

I have looked into using mod_rewrite and an apache ErrorDocument cgi. I 
think this will be straight forward to do, but the javascript will need 
to put the MetaTileID on the request url so it can be picked up my 
mod_rewite regex. It doesn't look like the group/layer info is being 
passed to the tile.php url via the javascript which is fine for my 
purposes, but you would need to pass that also if you want mod_write to 
pick it up. These extra parameters can be ignored by tile.php

Once I get the MetaTileID calculated in javascript and added to the url, 
I should be able to give it a try. If it works I'll see if I can run 
some timing tests on it.

-Steve

Stephen Woodbridge wrote:
> It would need to be set up and tested, but if you have a good size cache 
> and are getting a 70% hit rate then you are generating 70% less CGI 
> processes that do nothing but spool a file back to the client which 
> apache does very well.
> 
> Is this "substantially better"? Don't know.
> 
> -Steve
> 
> Paul Spencer wrote:
> 
>> Stephen is probably correct, using the web server to generate 404 
>> errors and using a web server configuration that redirects the error 
>> handler could be an excellent way to handle this.
>>
>> I am not convinced that it would be substantially better than the dso 
>> method ... but that's where I am also hoping to get feedback :)
>>
>> Paul
>>
>> Stephen Woodbridge wrote:
>>
>>> I thinking that be possible to convert ka-map requests to actual tile 
>>> images instead of via the CGI, and have it be smart enough to handle 
>>> a 404 response for a tile by re issuing the request via the CGI.
>>>
>>> This would unload the server significantly at the cost of a slightly 
>>> longer delay in generating a new tile. It might be that the new tile 
>>> will load faster anyway because there is more processor time 
>>> available to generate the new tiles.
>>>
>>> -Steve
>>>
>>> Matthew Perry wrote:
>>>
>>>> Hey folks,
>>>>
>>>>   It occured to me, as I watched my processor run near 100% due to a
>>>> few ka-map tile requests, that running ka-map with PHP as a CGI might
>>>> be a serious liability. In other words, having to start a new process
>>>> for each tile is extremely expensive compared to running a persistent
>>>> process or daemon.
>>>>
>>>>   Has anyone used Ka-Map with PHP/Mapscript as a DSO? It seems as if
>>>> this would speed things up a bit. Is this even possible? There has
>>>> been some discussion on the Mapserver list and the consensus is still,
>>>> unfortunately, that Apache 2 with PHP DSO is not stable with Mapscipt.
>>>> Does anyone's experience prove otherwise??
>>>>
>>>> What are other folks doing to improve ka-map perfomance given the
>>>> limitations of CGI?
>>>>
>>>
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>>>
>>
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