[OSM-talk] handover of tile.openstreetmap.org

[Steve Chilton]

Jon
 
For Mapnik rendering make sure you liaise with Artem and ensure that the latest style sheet is available (in SVN?). He and I worked through some style changes recently and it would be good to see these reflected in the next round of renders.
 
Cheers
STEVE

	-----Original Message----- 
	From: talk-bounces at openstreetmap.org on behalf of Jon Burgess 
	Sent: Sat 5/12/2007 1:30 PM 
	To: Rainer Dorsch 
	Cc: talk at openstreetmap.org 
	Subject: Re: [OSM-talk] handover of tile.openstreetmap.org
	
	

	On Sat, 2007-05-12 at 13:50 +0200, Rainer Dorsch wrote:
	> Am Freitag, 11. Mai 2007 20:32 schrieb Jon Burgess:
	> > On Fri, 2007-05-11 at 12:11 -0600, SteveC wrote:
	> > > Dear all
	> > >
	> > > at the oxford dev day jburgess (whos already done a bunch of things
	> > > with mapnik and osm) and I talked a bit about tile and he was willing
	> > > to take it over. mapnik generation on tile.openstreetmap.org is now
	> > > controlled by jburgess who has many ideas (and more importantly the
	> > > time) for speeding / improving things. So please direct bugs,
	> > > features and comments about all this to him. Thanks Jon!
	> > >
	> > > nick - jon has an account on tile I created (jburgess) and AFAIK has
	> > > the permissions needed to do stuff. Only thing may be a sudo to
	> > > restart apache at some point.
	> > >
	> > > have fun,
	> > >
	> > > SteveC | steve at asklater.com | http://www.asklater.com/steve/
	> >
	> > Thanks Steve.
	> >
	> > Please let me know if you've got any suggested improvements.
	> >
	> > I'm already aware of the request to "get stuff rendered as soon as it is
	> > uploaded to the DB". Maybe this is something we'll achieve one day --
	> > but there are many things which would need to be changed in the current
	> > setup and we are not likely to achieve it in the near future.
	> >
	> > On my todo list at the moment I've got:
	> >
	> > - Fix up the display at low zoom which shows bad tiles off the side of
	> > the map.
	> >
	> > - Try implementing real-time re-rendering of the latest planet.osm dump.
	> > I have a script which does this on my home machine but it is unclear if
	> > this will scale up to work successfully with all the users of tile.
	> >
	> >     Jon
	> >
	>
	> Hmm....I must miss something, but I have the impression that re-rendering is
	> *not* working at all at the moment. At least (2151 1413) is in the queue
	> since many days. First I thought that has something todo with the 0.4 API
	> change, but that seems to be done now (?).
	>
	
	The re-rendering is only semi-working and is backlogged by about 2 weeks
	worth of tiles. At this moment in time there are 525955 tiles waiting to
	be re-rendered (dating from 2007-04-28+).
	
	I have been running the script manually and identified that the
	rendering code crashed when processing tiles with certain names.
	When this happened the 'bad' tile would get left in the dirty list
	blocking all future re-renderings.
	
	The bug has been tracked down to an issue with Mapnik rendering names
	which start with the UTF-8 sequence e2 80 8c (a "ZERO WIDTH
	NON-JOINER"). I have search the Postgres rendering DB for all such
	strings and have removed this character from them (ways 4294988,
	4295399, 4313895, 4361612). I have alerted Artem to the issue in mapnik.
	
	I'll continue to monitor the rendering scripts and fix any more problems
	which arise.
	
	At the current rate of rendering I estimate that the backlog will be
	cleared in the next 24 hours (ETA finishing 14:30 BST Sunday 13th May).
	
	If you are desperate to get a few tiles re-rendered then I can run them
	through the scripts manually -- you'll need to supply me with a list of
	tile x,y,z or URLs e.g. http://tile.openstreetmap.org/12/1921/1972.png
	
	Send the tile list to me directly, don't copy the mailing list.
	
	        Jon
	
	
	
	
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