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Re: Contd: Release of SAGE 1.0: a stable, responsive and unrestricted SPARQL query server

From: Kingsley Idehen <kidehen@openlinksw.com>
Date: Sat, 8 Sep 2018 15:35:57 -0400
To: public-lod@w3.org
Message-ID: <62e95cf3-bb51-4a00-474d-62f3e264af32@openlinksw.com>
On 9/8/18 2:53 PM, Martynas Jusevičius wrote:
> http://sage.univ-nantes.fr/sparql/dbpedia-2016-04
>
> Isn’t this the endpoint?

No it isn't.

That is a Web Page in front of a SPARQL service scoped to specific
datasets.

Here's a set of commands (for Unix, Linux, or macOS)  that a SPARQL
endpoint for the SPARQL Protocol would handle:

echo "
select distinct ?o
where {?s a ?o}
limit 100" > sparql-query.rq ;


cat sparql-query.rq ;

QUERY=$(<sparql-query.rq) && curl -X POST -H "Accept: text/html"
--data-urlencode "query=$QUERY" http://linkeddata.uriburner.com/sparql ;

QUERY=$(<sparql-query.rq) && curl -X POST -H "Accept:
application/sparql-results+xml" --data-urlencode "query=$QUERY"
http://linkeddata.uriburner.com/sparql ;


QUERY=$(<sparql-query.rq) && curl -X POST -H "Accept: text/html"
--data-urlencode "query=$QUERY"
http://sage.univ-nantes.fr/sparql/dbpedia-2016-04 ;

QUERY=$(<sparql-query.rq) && curl -X POST -H "Accept:
application/sparql-results+xml" --data-urlencode "query=$QUERY"
http://sage.univ-nantes.fr/sparql/dbpedia-2016-04 ;


> On Sat, 8 Sep 2018 at 20.38, Kingsley Idehen <kidehen@openlinksw.com
> <mailto:kidehen@openlinksw.com>> wrote:
>
>     On 9/8/18 2:31 PM, Kingsley Idehen wrote:
>>     On 9/8/18 4:23 AM, Pascal Molli wrote:
>>>     Dear Kingsley,
>>>
>>>     We detail how, and in which context, we achieved the SaGe result in:
>>>
>>>         Thomas Minier, Hala Skaf-Molli, Pascal Molli. SaGe:
>>>         Preemptive Query Execution for
>>>         High Data Availability on the Web. 2018. 〈hal-01806486
>>>         <https://hal.archives-ouvertes.fr/hal-01806486v1>〉
>>>
>>
>>     Hi Pascal,
>>
>>     You re making claims that are best verified in a live environment
>>     i.e., one of the fundamental virtues of a SPARQL endpoint.
>>
>>     We have many live endpoints:
>>
>>     [1] http://dbpedia.org/sparql
>>     [2] http://dbpedia-live.openlinksw.com/sparql
>>     [3] http://linkeddata.uriburner.com/sparql
>>     [4] http://lod.openlinksw.com/sparql
>>
>>     many others published by others.
>>
>>     We even share documents regarding configuration [1].
>>
>>>
>>>     The result is confirmed with extensive benchmarks with Virtuoso,
>>>     TPF and BrTPF.
>>>     The paper details how to re-run the experimentations.
>>
>>     No, you are observations from a setup constructed by you. I am
>>     requesting that you demonstrate your claims via a live SPARQL
>>     endpoint, not a paper. I am requesting this for a specific
>>     reason, so can you provide this or not?
>>
>>>
>>>     To improve data availability for end-users, we optimized the
>>>     SaGe server for 
>>>     public LOD servers with read-only datasets. SaGe  preempts running 
>>>     queries at low cost to provide a stable, responsive and
>>>     unrestricted service 
>>>     in this context.
>>>
>>>     The "Anytime Query" capability of a Virtuoso server is great but
>>>     does not ensure complete
>>>     answers.
>>
>>     Again, until you provide a live SPARQL endpoint you will not
>>     actually understand why "Anytime Query" actually exists i.e., you
>>     "..is great but does not ensure complete answers" speaks for itself.
>>
>>>
>>>     If you need more details about our results, we will be happy to
>>>     share with you what we 
>>>     observed on Virtuoso.
>>
>>     Can you provide a live SPARQL endpoint or not?
>>
>>     Kingsley 
>
>
>     I forgot to add the URI of the Google Spreadsheet containing
>     configuration details of various live Virtuoso instances.
>
>     [1]
>     https://docs.google.com/spreadsheets/d/1-stlTC_WJmMU3xA_NxA1tSLHw6_sbpjff-5OITtrbFw/
>
>
>     -- 
>     Regards,
>
>     Kingsley Idehen	      
>     Founder & CEO 
>     OpenLink Software   (Home Page: http://www.openlinksw.com)
>
>     Weblogs (Blogs):
>     Legacy Blog: http://www.openlinksw.com/blog/~kidehen/
>     <http://www.openlinksw.com/blog/%7Ekidehen/>
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>     Medium Blog: https://medium.com/@kidehen
>
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>
>     Web Identities (WebID):
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>             : http://id.myopenlink.net/DAV/home/KingsleyUyiIdehen/Public/kingsley.ttl#this
>

-- 
Regards,

Kingsley Idehen	      
Founder & CEO 
OpenLink Software   (Home Page: http://www.openlinksw.com)

Weblogs (Blogs):
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Blogspot Blog: http://kidehen.blogspot.com
Medium Blog: https://medium.com/@kidehen

Profile Pages:
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LinkedIn: http://www.linkedin.com/in/kidehen

Web Identities (WebID):
Personal: http://kingsley.idehen.net/public_home/kidehen/profile.ttl#i
        : http://id.myopenlink.net/DAV/home/KingsleyUyiIdehen/Public/kingsley.ttl#this


Received on Saturday, 8 September 2018 19:36:23 UTC

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