[Tilecache] how to speed up tilecache seeding
no-reply at neogeo-online.net
Wed Jun 3 12:04:51 EDT 2009
Also, please note that even when using Metatiling tilecache_seed stille
counts how many tiles it has to generate, without indicating how many
base tiles it corresponds to. What you can see in the tilecache_seed
ouuput is that the total amount of tiles to generate is drastically
lower than without metatile.
But be sure tilecache_seed takes metatiling in consideration, cause it
Alireza Kashian a écrit :
> Hi fredj
> Yes. I have done exactly same as you say.
> But are you using tilecache_seed.py code to seed? if yes, look at the
> output screen, you see that tiles are generated one by one..
> in my case, each tile takes 1 second to generate and we have like 40
> layers in our map file..so I know it needs high computing power to send
> each request seperately to tilecache...I was hoping that
> tilecache_seed.py could jump another 11 tiles and request like 1 - 12 -
> 23 - 34 - 45 ....
> because when it calls for 1, it generate all 121 tiles around it...when
> it calls 12, it generate all tiles around 12...and so on..
> so it doesn not need to call for: 1-2,3,4,5,6,7,8..........
> On Wed, Jun 3, 2009 at 7:29 PM, Frederic Junod
> <frederic.junod at camptocamp.com <mailto:frederic.junod at camptocamp.com>>
> The meta tiling system works for me with the trunk version .
> Make sure you have the:
> in your layers options.
> Meta tiling is off by default even if you have a metaSize.
> PS: lucky you; I have more that 9'000'000 tiles in my last level :-)
>  http://svn.tilecache.org/trunk/tilecache
> On Wed, Jun 3, 2009 at 3:58 PM, Alireza Kashian
> <alireza.kashian at gmail.com <mailto:alireza.kashian at gmail.com>> wrote:
> > Hi.
> > I would like to know how we can making tiles faster in
> > The issue is that tilecache_seed.py tries to make tiles ONE by ONE..
> > so for example, in our case, in last zoom levels we have 300,000
> tiles and
> > each tile is generate in 1 second because our Map File is very
> complex and
> > parsing and making queries to PostGIS takes time.
> > Actually MetaTiling is a very good solution, but the problem is
> that I feel
> > Tilecache_seed.py does its job without attention to Meta Tiling..for
> > example, our MetaTile is 11x11...so 121 Tiles are geneated in
> like 3-4
> > seconds...but When I run Tilecache_seed.py . I see from the log
> that it
> > makes tile requests one by one which takes like 300,000 seconds
> for just one
> > of our zoom levels..
> > Our map file is large , it is like 400 Kbyte..so I feel how hard
> it is to
> > make queries 300,000 times for making 300,000 tiles :)
> > How can we help Tilecache_seed.py to benefit from MetaTile config in
> > Tilecache.cfg.
> > Thanks
> > Alireza
> > _______________________________________________
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> > Tilecache at openlayers.org <mailto:Tilecache at openlayers.org>
> > http://openlayers.org/mailman/listinfo/tilecache
> Frédéric Junod
> Camptocamp SA
> Tilecache mailing list
> Tilecache at openlayers.org
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