[mapguide-users] How long will it take to generate tiles by MgCooker

[Traian Stanev]

Empty tiles were probably not generated any faster due to rendering not being the bottleneck in your particular case. I'm guessing the request overhead time plus the FDO query time (per layer) were totally dominating the rendering time both for empty and non-empty tiles. If you made your tiles a lot bigger, or had a lot of labeling for example, it would be the other way around. Unfortunately, making tiles bigger is not an option for web based viewing -- but another option would be to generate really huge tiles (like 4kx4k pixels) and then cut them up into small tiles as a post-processing step.

Traian


-----Original Message-----
From: mapguide-users-bounces at lists.osgeo.org [mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of Stefan Dalakov
Sent: Tuesday, April 06, 2010 3:38 AM
To: MapGuide Users Mail List
Subject: Re: [mapguide-users] How long will it take to generate tiles by MgCooker

I was fighting with this few days ago. It seems, that tiles are 
generated not for the extents of the base layer being tiled, but for the 
extents of the largest layer from the map. What I had was county map, 
not very detailed, with one municipality with full detail. I wanted to 
create tiles for this very detailed part (approx. 1/20 in both 
dimensions). And the surprising part was that "empty" tiles, which are 
400 times more than the "useful" ones, were not generated faster. I 
guess Daniel is facing the same problem.

Stefan Dalakov

Traian Stanev wrote:
>
> It’s also a bit suspicious that it’s generating 400M tiles – that’s 
> something like 20K tiles in each dimension. I’m not sure what extent 
> your map covers, but that seems like it would be too detailed of a 
> scale for anything but whole-world maps.
>
> Traian
>
> *From:* mapguide-users-bounces at lists.osgeo.org 
> [mailto:mapguide-users-bounces at lists.osgeo.org] *On Behalf Of *Daniel Du
> *Sent:* Thursday, April 01, 2010 11:03 PM
> *To:* MapGuide Users Mail List
> *Subject:* RE: [mapguide-users] How long will it take to generate 
> tiles by MgCooker
>
> Yes, I think you are just hitting the point! J
>
> maybe I need to set the scales to generalize some layers and try again.
>
> cheers,
>
> Daniel
>
> *From:* mapguide-users-bounces at lists.osgeo.org 
> [mailto:mapguide-users-bounces at lists.osgeo.org] *On Behalf Of *Zac Spitzer
> *Sent:* 2010年4月2日 10:55
> *To:* MapGuide Users Mail List
> *Subject:* Re: [mapguide-users] How long will it take to generate 
> tiles by MgCooker
>
> just raster data? is your data too detailed, ie you
> can generalise you data to match the scales your
> rendering...
>
> you should be looking at using at least a dual quad core
> server for that size of a map
>
> how long does it take to render a map in the browser?
>
> On 2 April 2010 13:49, Daniel Du <Daniel.Du at autodesk.com 
> <mailto:Daniel.Du at autodesk.com>> wrote:
>
> Hi all,
>
> Anyone have generated tiles using MgCooker? How long did you take to 
> complete it?
>
> Here is mine:
>
> It has been running for 12hrs, and generated 10,044 of 458,315,636
>
> Remaining tile : 1218080:51:27 !
>
> That’s horrible, will it take days, several weeks, or even months? ?
>
> Am I missing something to improve performance?
>
> ===================
>
> Layers: 28 layers,
>
> Scales: 3 (actually, I was planning to set it to 7, but it costs too 
> much timeL)
>
> Thread: 10
>
> Server: Intel Pentium D CPU 3.0GHz *2
>
> RAM 2G
>
> Windows 7 Enterprise
>
> MapGuide OpenSource 2.1 with Autodesk Raster FDO
>
> Maestro 2.0
>
> ===================
>
> Regards,
>
> Daniel
>
>
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>
>
>
> -- 
> Zac Spitzer
> Solution Architect / Director
> Ennoble Consultancy Australia
> http://www.ennoble.com.au
> http://zacster.blogspot.com
> +61 405 847 168
>
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