[OSM-talk] Something wrong with OSM server?

[Steve Chilton]

Nick,
 
Sorry, but could you say that again in plain English!
Are you recommending changes in working practice to try to alleviate this situation meantime?
 
Cheers
STEVE

	-----Original Message----- 
	From: talk-bounces at openstreetmap.org on behalf of Nick Hill 
	Sent: Fri 2/2/2007 11:25 PM 
	To: talk at openstreetmap.org 
	Cc: 
	Subject: Re: [OSM-talk] Something wrong with OSM server?
	
	

	Hi All
	
	
	It seems to me the 'problem' is that in areas like Central London, we have a
	very high aerial density of nodes and segments.
	
	The servers are protected by having a bounding box limitation, which has up
	until now, sanitised huge queries and only returned those the hardware can
	reasonably handle.
	
	Given there is no inherent limit on aerial density of OSM data, and given we
	have areas of extremely high density, It is no longer the case that establishing
	a maximum bounding box is adequate to preserve system integrity. We'll need to
	consider other mechanisms to maintain system integrity.
	
	We can, of course, upgrade systems, but that alone gives no guarantee. We will
	therefore need to abort queries where the number of nodes exceeds a pre-set
	threshold.
	
	This means the client will not know apriori if a query will be accepted by the
	API. However, the API could perhaps respond with a series of bounding boxen
	which the client may like to try instead.
	
	Perhaps the API can be accessed by a queued, asynchronous system where a server
	is set aside to handle large queries one by one. Perhaps queries mailed to the
	server then returned by mail as and when they are processed.
	
	
	
	Adrian Frith wrote:
	> Hi folks,
	>
	> Is anyone else having trouble getting through to the server? I can't
	> open the Slippy map or the Java editing applet; I just get connection
	> timeouts. I can get to the wiki without any trouble
	>
	> It's very possible that my ISP is screwing something up, so I thought
	> I'd check and see if anyone else is having trouble.
	>
	> Thanks,
	> Adrian
	>
	>
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