thanks a lot! Sorry, but what do you mean with "plain update"?
Paola >----Messaggio originale---- >Da: marco.neum...@gmail.com >Data: 30/03/2012 15.21 >A: "villa...@libero.it"<villa...@libero.it> >Cc: <jena-users@incubator.apache.org> >Ogg: Re: Re: Re: Re: Jena slow ontology population > >so why don't you try a plain update and see how that performs? > > >On Fri, Mar 30, 2012 at 8:59 AM, villa...@libero.it <villa...@libero.it> wrote: >> yes, I insert individuals in every step. >> >> thanks! >> >>>----Messaggio originale---- >>>Da: marco.neum...@gmail.com >>>Data: 30/03/2012 14.47 >>>A: "villa...@libero.it"<villa...@libero.it> >>>Cc: <jena-users@incubator.apache.org> >>>Ogg: Re: Re: Re: Jena slow ontology population >>> >>>So all updates are A-box related? >>> >>>On Fri, Mar 30, 2012 at 8:22 AM, villa...@libero.it <villa...@libero.it> >> wrote: >>>> Thanks a lot for your reply! >>>> As you have assumed, I don't use neither TDB or SDB...I have an in memory- >>>> model at runtime. >>>> It seems to me that my model does not require complicate inferences...at >> every >>>> step, >>>> it extracts a tuple from the DB and generates the corresponding individuals >>>> with: >>>> model.createIndividual; the properties are added using the addProperty >>>> method. >>>> >>>> The only thing that can be complicated to be calculated is that, if an >>>> individual has the same >>>> id of the last one processed, I extract the latter from the ontology to add >>>> some properties... >>>> >>>> thanks a lot again! >>>> >>>> Paola >>>> >>>> >>>> >>>>>----Messaggio originale---- >>>>>Da: marco.neum...@gmail.com >>>>>Data: 30/03/2012 13.56 >>>>>A: "villa...@libero.it"<villa...@libero.it> >>>>>Cc: <jena-users@incubator.apache.org> >>>>>Ogg: Re: Re: Jena slow ontology population >>>>> >>>>>your hardware looks good, what type of inference does your model >>>>>require for updates? >>>>> >>>>>Pellet is a very powerful reasoning system which can result in >>>>>significant computational complexity for the subsystem to deal with >>>>>depending on your level of inference that is of course. So you better >>>>>know exactly what level of reasoning your application requires in >>>>>advance to optimize the system at run-time. >>>>> >>>>>TBD, SDB are persistent storage options, from what you have just said >>>>>I can assume you are using an in-memory model at run-time. >>>>> >>>>> >>>>> >>>>> >>>>>On Fri, Mar 30, 2012 at 7:41 AM, villa...@libero.it <villa...@libero.it> >>>> wrote: >>>>>> Hi Marco, thanks a lot for your help! :-) >>>>>> >>>>>> Version of Jena: 2.6.4 >>>>>> OS: Linux 64 bit >>>>>> reasoner: Pellet >>>>>> TDB and SDB: I don't use them, I believed that they were related to RDF >>>> while >>>>>> I'm using OWL, but maybe I can be wrong... >>>>>> >>>>>> current hw: >>>>>> *-CPU >>>>>> description: CPU >>>>>> product: Intel(R) Xeon(R) CPU >>>>>> version: Intel(R) Xeon(R) CPU E5620 >>>>>> slot: CPU 1 >>>>>> size: 2400MHz >>>>>> capacity: 2400MHz >>>>>> width: 64 bits >>>>>> clock: 133MHz >>>>>> *-memory >>>>>> description: System Memory >>>>>> physical id: 24 >>>>>> slot: System board or motherboard >>>>>> size: 8GiB >>>>>> >>>>>> If you want to know other information, please tell me! And thanks a lot >>>> again! >>>>>> >>>>>> Paola >>>>>> >>>>>>>----Messaggio originale---- >>>>>>>Da: marco.neum...@gmail.com >>>>>>>Data: 30/03/2012 11.36 >>>>>>>A: <jena-users@incubator.apache.org>, "villa...@libero.it"<villa. >> va@libero. >>>>>> it> >>>>>>>Ogg: Re: Jena slow ontology population >>>>>>> >>>>>>>can you please be a bit more specific about the configuration you have >>>>>>>currently installed? e.g. version of Jena, back end type (TDB, SDB, >>>>>>>in-memory), current hardware, and OS (32bit, 64bit, linux, >>>>>>>windows,mac), and type of reasoner you use. >>>>>>> >>>>>>>--- >>>>>>>Marco Neumann >>>>>>>KONA >>>>>>> >>>>>>>Join us at SemTech Biz in San Francisco June 3-7 2012 and save 15% >>>>>>>with the lotico community discount code 'STMN' >>>>>>>http://www.lotico.com/evt/SemTechSF2012/ >>>>>>> >>>>>>>On Fri, Mar 30, 2012 at 4:22 AM, villa...@libero.it <villa.va@libero. it> >>>>>> wrote: >>>>>>>> Dear users, >>>>>>>> >>>>>>>> I am new to Jena and have a problem with Jena OWL-API. I have written >>>> some >>>>>>>> simple Java code that: >>>>>>>> >>>>>>>> 1) extracts some tuples (around 1 million tuples) of data from a >> database >>>>>>>> 2) puts each of them in an ontology file using Jena library. In >>>> particular, >>>>>> it >>>>>>>> takes every tuple and inserts >>>>>>>> every element in a class of the ontology file, by using methods like >>>>>>>> createIndividual, addproperty, model.write. >>>>>>>> >>>>>>>> The insertion phase is very quick when my program starts, but the >>>>>> performances >>>>>>>> became worse and worse as >>>>>>>> time goes by. The DB man has told me that the database has no problems. >> I >>>>>> have >>>>>>>> run the program with 5 gigabytes >>>>>>>> of RAM...it simply ends up to use them all. Is that normal? Do I have >> to >>>>>> use a >>>>>>>> more powerful PC to manage such >>>>>>>> data? I can give you more details about my problem if you tell me what >> I >>>>>> have >>>>>>>> to look for exactly. >>>>>>>> >>>>>>>> Thanks a lot, >>>>>>>> >>>>>>>> Paola >>>>>>> >>>>>> >>>>>> >>>>> >>>>> >>>>> >>>>>-- >>>>> >>>>> >>>>>--- >>>>>Marco Neumann >>>>>KONA >>>>> >>>>>Join us at SemTech Biz in San Francisco June 3-7 2012 and save 15% >>>>>with the lotico community discount code 'STMN' >>>>>http://www.lotico.com/evt/SemTechSF2012/ >>>>> >>>> >>>> >>> >>> >>> >>>-- >>> >>> >>>--- >>>Marco Neumann >>>KONA >>> >>>Join us at SemTech Biz in San Francisco June 3-7 2012 and save 15% >>>with the lotico community discount code 'STMN' >>>http://www.lotico.com/evt/SemTechSF2012/ >>> >> >> > > > >-- > > >--- >Marco Neumann >KONA > >Join us at SemTech Biz in San Francisco June 3-7 2012 and save 15% >with the lotico community discount code 'STMN' >http://www.lotico.com/evt/SemTechSF2012/ >
