[mapguide-internals] RFC 90 Meta Tiling Support

Sat Mar 27 00:12:20 EDT 2010

Hi Zac,

UV has written a fair bit of code here.  It will take me a while to go through it.  From a quick scan, the meta tiling seems to based on serverconfig.ini parameters.  This is a good thing if we want to get it in for 2.2.

Regards,
Trevor

-----Original Message-----
From: mapguide-internals-bounces at lists.osgeo.org [mailto:mapguide-internals-bounces at lists.osgeo.org] On Behalf Of Zac Spitzer
Sent: March 26, 2010 9:51 PM
To: MapGuide Internals Mail List
Subject: Re: [mapguide-internals] RFC 90 Meta Tiling Support

No worries Trevor!

code wise how does this look so far?

http://trac.osgeo.org/mapguide/changeset/4700

z
On 27 March 2010 14:40, Trevor Wekel <trevor_wekel at otxsystems.com> wrote:
> Hi Zac, Hi UV,
>
> Thank you.  I apologize if I seemed a bit "cranky".  Part of my motivation was to get mapguide-internals in the loop a little earlier.  As Jason mentioned, thoughtful and engaged discussions earlier in the RFC process should reduce the likelihood of rework and delays later on.  RFC 60 dragged on for many months.
>
> By no means am I an expert in all things MapGuide.  I'm not sure anyone is due to code base complexity.  Collectively, the people on mapguide-internals are "the expert".  That's why mapguide-internals list engagement is so important.
>
> Regards,
> Trevor
>
>
> -----Original Message-----
> From: mapguide-internals-bounces at lists.osgeo.org [mailto:mapguide-internals-bounces at lists.osgeo.org] On Behalf Of Zac Spitzer
> Sent: March 26, 2010 7:20 PM
> To: MapGuide Internals Mail List
> Subject: Re: [mapguide-internals] RFC 90 Meta Tiling Support
>
> Sorry everyone, we should of posted to internals first.
>
> that said there's a hell of lot of stuff done by AutoDesk Developers which
> doesn't really follow this pattern at all either... just saying :) but
> regardless
> that's no excuse, we should of posted to the list first.
>
> sandboxes are play grounds and the meta tiling work Uv is doing is very
> much a work in progress at the moment. Once he has nutted out the
> details he will post more info to internals
>
> so, lets leave that behind and rewind the clock....
>
> -----------------------------------------------------
>
> I have posted a Draft of RFC 90 on trac
>
> http://trac.osgeo.org/mapguide/wiki/MapGuideRfc90
>
> This is a proposal to add meta tiling support to the mapguide engine.
>
> The current approach is define a meta tile size factor in the serverconfig.ini
> which then works in the back ground, rendering a large tile and then
> slicing it into the normal tile sizes.
>
> Given the static nature and global nature of anything done via serverconfig.ini,
> this is all or nothing. I think we have resource headers which could be
> used a lot more than we do currently, that way we can make map specific
> configuration overrides.
>
> For example, image format, selection color and meta tile factor would
> all be good candidates for setting via resource headers. That would
> avoid having to rev the xml def's to add such functionality.
>
> Being able to tune maps configurationwithout changing a global setting
> and restarting the server would be a good thing... RFC worthy?
>
> Back to meta tiling...
>
> Another approach would be to add support for a RENDERMETATILE mapagent,
> which would avoid the locking and polling in the current model.
>
> Uv's work so far at the base implementation is the rfc90 sandbox
>
> Regards
>
> Zac
>
>
>
>
>
>
> On 27 March 2010 06:34, Jason Birch <jason at jasonbirch.com> wrote:
>> The sandbox doesn't necessarily need to be tied to an RFC.
>>
>> Although the proper procedure should be followed in the future, I'm happy to
>> retroactively approve the creation of the sandbox once the description email
>> is sent.  Our SVN churns enough without having to delete / recreate that
>> branch :)
>>
>> It would be good to get the RFC into discussion/approval before too much
>> work is done so we can ensure that the approach is acceptable.  Wouldn't
>> want to have to re-do substantial parts or (as a project) to lose this
>> contribution.
>>
>> Jason
>>
>>
>> On 26 March 2010 09:27, Trevor Wekel  wrote:
>>
>>> Hello UV,
>>>
>>> I have been having offline discussions with Zac regarding Meta Tiling
>>> Support.  I do implicitly support this RFC because of the potential
>>> performance improvements.
>>>
>>> Did I miss something?  I see that a draft RFC has been posted and a new
>>> RFC90 sandbox has been created.  I do not recall see a posting to
>>> mapguide-internals stating that you are
>>> a) Working on meta tiling support
>>> b) Going to create an RFC
>>> c) Requesting a Sandbox
>>>
>>> The Sandbox rules are clearly posted on
>>> http://trac.osgeo.org/mapguide/wiki/Sandboxes.  Sandboxes must be
>>> requested.
>>>
>>> It is great that you are contributing to the MapGuide project.  We
>>> definitely need more developers in the community.  Please keep in mind that
>>> all developers have to play by the rules.
>>>
>>> If a sandbox for RFC 90 was officially requested on mapguide-internals,
>>> please disregard this email.
>>>
>>>
>>> Sincerely,
>>> Trevor
>>>
>>>
>>> _______________________________________________
>>> mapguide-internals mailing list
>>> mapguide-internals at lists.osgeo.org
>>> http://lists.osgeo.org/mailman/listinfo/mapguide-internals
>>>
>>>
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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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>
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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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