Hi Ghislain,

The HTTP ports ( and SQL ports) cannot be the same for the two instances 
running on the same machine, they would have to be unique as I indicated 
previously, As if the ports are the same then the first to start will run and 
the other would fail to state with an “address already in use” type error in 
the Virtuoso file ...

Best Regards
Hugh Williams
Professional Services
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> On 13 Mar 2017, at 17:05, Ghislain ATEMEZING <ghislain.atemez...@gmail.com> 
> wrote:
> 
> Hi Hugh,
> [ Just wondering if someone ever test the option you proposed]
> 
> What would be the use case here? Let's suppose I have then 2 dbs starting 
> with the HHTP same ports. 
> Would that mean I can query them once? 
> Please could you provide us with more advantages of this approach?
> 
> TIA
> Best,
> Ghislain
> 
> El jue., 26 ene. 2017 a las 18:37, Hugh Williams (<hwilli...@openlinksw.com 
> <mailto:hwilli...@openlinksw.com>>) escribió:
> Hi Pasquale,
> 
> What is the purpose of running two Virtuoso instances, is this for setup 
> access for SPARQL or SQL storage ?
> 
> The easiest way to start multiple Virtuoso database instances on the same 
> machine is to create two separate databases with a “virtuoso.ini” file on 
> each set to use unique SQL & HTTP ports and then start each in the separate 
> directories with a lock file for each …
> 
> Best Regards
> Hugh Williams
> Professional Services
> OpenLink Software, Inc.      //              http://www.openlinksw.com/ 
> <http://www.openlinksw.com/>
> Weblog   -- http://www.openlinksw.com/blogs/ 
> <http://www.openlinksw.com/blogs/>
> LinkedIn -- http://www.linkedin.com/company/openlink-software/ 
> <http://www.linkedin.com/company/openlink-software/>
> Twitter  -- http://twitter.com/OpenLink <http://twitter.com/OpenLink>
> Google+  -- http://plus.google.com/100570109519069333827/ 
> <http://plus.google.com/100570109519069333827/>
> Facebook -- http://www.facebook.com/OpenLinkSoftware 
> <http://www.facebook.com/OpenLinkSoftware>
> Universal Data Access, Integration, and Management Technology Providers
> 
> 
> 
> > On 26 Jan 2017, at 14:28, Pasquale Di Donato <pasquale.didon...@gmail.com 
> > <mailto:pasquale.didon...@gmail.com>> wrote:
> >
> > Hi all
> >
> > I wanted to run 2 Virtuoso Open Source instances on one virtuoso.db, but it 
> > seems not possible since when the first instances is run then a lock file 
> > is created for the DB.
> >
> > Any hint here or is this not possible with the Open Source Edition?
> >
> > Pasquale
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