Re: [Bigdata-developers] Bulk loading into bigdata

[Rose B. <ros...@gm...>]

Dear Bryan,

For now we are just using RDR for storing provenance or source of
triples. All these questions arise in my mind out of curiosity :)

I saw bigdata slides at
http://www.cse.unsw.edu.au/~iwgdm/2012/Slides/bigdata.pdf. And I am
pretty curious to read more about:  how Bigdata implements vectored
query execution and what engineering goes behind its analytic mode of
execution. If possible, can you please point me to resources from
which I learn more about the same?


Thanks & Regards,
Rose


On Mon, Oct 6, 2014 at 8:15 PM, Bryan Thompson <br...@sy...> wrote:
> Rose,
>
> I think that the requirement for statement level metadata should be
> orthogonal to the decision to use named graphs.  Statement level metadata
> can be used for a variety of purposes.  For example, it can be used for
> security, it can be used to provide the source of the statement (which is
> often the use case for named graphs), to associate an author with a
> statement, to associate a creation time with a statement, to associate a
> weight with an edge of a graph, etc.
>
> What is the use case that motivates the RDR mechanisms for you?  Perhaps if
> you can explain that I can provide an example of how this might be relevant
> in the context of named graphs for your application.  However, the feature
> is not currently supported for the quads mode of the bigdata database, so
> this is a somewhat academic question.
>
> Thanks,
> Bryan
>
> ----
> Bryan Thompson
> Chief Scientist & Founder
> SYSTAP, LLC
> 4501 Tower Road
> Greensboro, NC 27410
> br...@sy...
> http://bigdata.com
> http://mapgraph.io
>
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>
> On Mon, Oct 6, 2014 at 10:40 AM, Rose Beck <ros...@gm...> wrote:
>>
>> Dear Bryan,
>>
>> Probably I am new to the field. But since you are an experienced
>> person in the field, therefore can you please help me understand that:
>> when we apply RDR mechanism to triples, then what is the practical
>> use-case application of using named graph mechanism? I mean I
>> understand intuitively but I still am not able to get the practical
>> significance of using named graphs.
>>
>>
>> Thanks & Regards,
>> Rose
>>
>> On Mon, Oct 6, 2014 at 8:02 PM, Bryan Thompson <br...@sy...> wrote:
>> > The purpose of RDR is to permit statements about statements.
>> >
>> > The purpose of named graphs is to allow statements to be collected into
>> > containers.
>> >
>> > With RDF* support for named graphs, you could do both.
>> >
>> > Whether or not this is a good idea is an interesting question.
>> > Consider,
>> > that named graphs could be interpreted as just a special case of a
>> > statement
>> > about a statement where the database then applies special indexing
>> > (typically by maintaining additional indices for fast access by the
>> > named
>> > graph).
>> >
>> > For example, given:
>> >
>> > <<:a :b :c> :namedGraph :d>
>> >
>> > If we assume that ":namedGraph" has the semantics of the SPARQL named
>> > graphs
>> > mechanism, then this RDR assertion says that the statement :a :b :c
>> > exists
>> > in the named graph :d.
>> >
>> > If so, then the RDR mechanisms always apply to triples and the named
>> > graphs
>> > mechanism just specifies the containers within which a given triple
>> > (including an RDR triple) is visible.
>> >
>> > Thanks,
>> > Bryan
>> >
>> > ----
>> > Bryan Thompson
>> > Chief Scientist & Founder
>> > SYSTAP, LLC
>> > 4501 Tower Road
>> > Greensboro, NC 27410
>> > br...@sy...
>> > http://bigdata.com
>> > http://mapgraph.io
>> >
>> > CONFIDENTIALITY NOTICE:  This email and its contents and attachments are
>> > for
>> > the sole use of the intended recipient(s) and are confidential or
>> > proprietary to SYSTAP. Any unauthorized review, use, disclosure,
>> > dissemination or copying of this email or its contents or attachments is
>> > prohibited. If you have received this communication in error, please
>> > notify
>> > the sender by reply email and permanently delete all copies of the email
>> > and
>> > its contents and attachments.
>> >
>> >
>> > On Mon, Oct 6, 2014 at 10:19 AM, Rose Beck <ros...@gm...>
>> > wrote:
>> >>
>> >> Dear Bryan,
>> >>
>> >> Thanks for the enlightening write-up about RDR. But I have a question
>> >> in the write-up you wrote "In the future, we plan to add support for
>> >> RDF* and SPARQL* to the quads mode of the platform as well. This will
>> >> allow statement level metadata to co-exist seamlessly with the named
>> >> graphs model." But I dont understand the need for supporting RDF* and
>> >> SPARQL* in quads mode. I mean I dont understand as to why do we need
>> >> to allow statement level metadata to co-exist with named graph model.
>> >> Can you please explain this with an example.
>> >>
>> >>
>> >> Thanks & Regards,
>> >> Rose.
>> >>
>> >> On Mon, Oct 6, 2014 at 5:59 PM, Bryan Thompson <br...@sy...>
>> >> wrote:
>> >> > I've added a page to the wiki based on that blog post:
>> >> >
>> >> > wiki.bigdata.com/wiki/index.php/Reification_Done_Right
>> >> >
>> >> > Thanks,
>> >> > Bryan
>> >> >
>> >> > ----
>> >> > Bryan Thompson
>> >> > Chief Scientist & Founder
>> >> > SYSTAP, LLC
>> >> > 4501 Tower Road
>> >> > Greensboro, NC 27410
>> >> > br...@sy...
>> >> > http://bigdata.com
>> >> > http://mapgraph.io
>> >> >
>> >> > CONFIDENTIALITY NOTICE:  This email and its contents and attachments
>> >> > are
>> >> > for
>> >> > the sole use of the intended recipient(s) and are confidential or
>> >> > proprietary to SYSTAP. Any unauthorized review, use, disclosure,
>> >> > dissemination or copying of this email or its contents or attachments
>> >> > is
>> >> > prohibited. If you have received this communication in error, please
>> >> > notify
>> >> > the sender by reply email and permanently delete all copies of the
>> >> > email
>> >> > and
>> >> > its contents and attachments.
>> >> >
>> >> >
>> >> > On Sun, Oct 5, 2014 at 5:27 PM, Rose Beck <ros...@gm...>
>> >> > wrote:
>> >> >>
>> >> >> Dear all,
>> >> >>
>> >> >> I have downloaded bigdata.war and have deployed it using sesame HTTP
>> >> >> API. Now I am not getting as to how should I load rdf
>> >> >> triples/provenance with triples to bigdata using nanosparqlserver? I
>> >> >> am using sesame HTTP API (using apache tomcat). Can someone please
>> >> >> help.
>> >> >>
>> >> >> I intend to use mysql, native java and postgres with sesame. Any
>> >> >> help
>> >> >> will be deeply appreciated.
>> >> >>
>> >> >> Regards,
>> >> >> Rose
>> >> >>
>> >> >>
>> >> >>
>> >> >>
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