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

From: Hugh Glaser <hugh@glasers.org>
Date: Sun, 9 Sep 2018 00:08:19 +0100
Cc: public-lod@w3.org
Message-Id: <B072FBF1-39B9-4A63-9481-6DBA5BB1B0AA@glasers.org>
To: Kingsley Idehen <kidehen@openlinksw.com>
Hi.
Not really my business (:-) - but that has never stopped me!), but I really don't understand the request for a live endpoint.
If I want to evaluate different implementations of a software system, what I do is download or implement on my own server, and then run them (multiple times) over the same datasets on the same hardware configuration etc, so that I am comparing the same things while controlling as many variables as possible.
Running stuff on other peoples' servers, with no reliable knowledge of the hardware or possibly even the datasets, seems of no value in terms of relative performance.
So why are you asking for a SPARQL endpoint?
Best
Hugh

> On 8 Sep 2018, at 19:31, Kingsley Idehen <kidehen@openlinksw.com> 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〉
> 
> 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 
>> 
>> --
>> Pascal
>> 
>> 
> 
> -- 
> Regards,
> 
> Kingsley Idehen	      
> Founder & CEO 
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> )
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> 
> 
> 

-- 
Hugh
023 8061 5652
Received on Saturday, 8 September 2018 23:08:47 UTC

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