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Re: The truth about SPARQL Endpoint availability

From: Richard Cyganiak <richard@cyganiak.de>
Date: Tue, 1 Mar 2011 01:11:46 +0000
Cc: public-lod@w3.org, SW-forum <semantic-web@w3.org>, semanticweb@yahoogroups.com
Message-Id: <580BF851-EDD7-4628-B00A-7CF4A2CEEA58@cyganiak.de>
To: Pierre-Yves Vandenbussche <pierre-yves.vandenbussche@mondeca.com>
On 1 Mar 2011, at 00:14, Pierre-Yves Vandenbussche wrote:
> Average 24h and 7days availability are just extra info. Colour associated to an endpoint is given based on its availability right now. That means:
> 
> -a red endpoint is NOT available right now.
> -an orange endpoint is available but had some troubles since last 24h.
> -a green endpoint is available without any trouble since last 24h.

Ok. But my point stands: There's a big difference between “down this very moment” (red) and “has never been up in the last 7 days”. The former might be back in 15 minutes. The latter most likely is gone permanently. I think it would be good to capture that in the choice of color.

Best,
Richard



> 
> May be I should put my legend at table's top.
> 
> Pierre-Yves Vandenbussche.
> 
> 
> On Tue, Mar 1, 2011 at 1:04 AM, Richard Cyganiak <richard@cyganiak.de> wrote:
> Great work Pierre-Yves!
> 
> Good to see that the CKAN directory is useful for something besides drawing pretty cloud pictures ;-)
> 
> The logo is genius.
> 
> Currently it seems that you get a red light for 75% uptime. 75% uptime sucks, but it is still very different from 0% uptime, which probably means that the site has died completely. So may I propose lowering the threshold between red and yellow a bit?
> 
> Or maybe the 0% endpoints should simply be displayed black.
> 
> Finally, could you create a CKAN record for your dataset, following [1]? Because then we could use your tool to verify that your tool is up and running.
> 
> Again, great work.
> 
> Richard
> 
> [1] http://www.w3.org/wiki/TaskForces/CommunityProjects/LinkingOpenData/DataSets/CKANmetainformation
> 
> 
> 
> On 28 Feb 2011, at 18:55, Pierre-Yves Vandenbussche wrote:
> 
> > Hello all,
> >
> > you have already encountered problems of SPARQL endpoint accessibility ?
> > you feel frustrated they are never available when you need them?
> > you develop an application using these services but wonder if it is reliable?
> >
> > Here is a tool [1] that allows you to know public SPARQL endpoints availability and monitor them in the last hours/days.
> > Stay informed of a particular (or all) endpoint status changes through RSS feeds.
> > All availability information generated by this tool is accessible through a SPARQL endpoint.
> >
> > This tool fetches public SPARQL endpoints from CKAN  open data. From this list, it runs tests every hour for availability.
> >
> > [1] http://labs.mondeca.com/sparqlEndpointsStatus/index.html
> > [2] http://ckan.net/
> >
> >
> 
> Pierre-Yves Vandenbussche 
> Research & Development 
> Mondeca 
> 3, cité Nollez 75018 Paris France 
> Tel. +33 (0)1 44 92 35 07 - fax +33 (0)1 44 92 02 59 
> Mail: pierre-yves.vandenbussche@mondeca.com 
> Website: www.mondeca.com 
> Blog: Leçons de choses
> 
> 
> 
Received on Tuesday, 1 March 2011 01:14:30 UTC

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