W3C home > Mailing lists > Public > public-rww@w3.org > March 2017

Re: ldp - hdfs

From: Brent Shambaugh <brent.shambaugh@gmail.com>
Date: Thu, 9 Mar 2017 12:52:22 -0600
Message-ID: <CACvcBVp0Lf=F9WjkduOU55kA-z28cHx-YCvfEetQPCZTiz5nig@mail.gmail.com>
To: Sergio Fernández <wikier@apache.org>
Cc: Jürgen Jakobitsch <juergen.jakobitsch@semantic-web.com>, public-rww <public-rww@w3.org>
Interpretation Dump:

"A LDP server can manage two kinds of LDPRs
<https://www.w3.org/TR/ldp/#dfn-linked-data-platform-resources>, those
resources whose state is represented using RDF (LDP-RS) and those using
other formats (LDP-NR). LDP-RSs have the unique quality that their
representation is based on RDF, which addresses a number of use cases from
web metadata, open data models, machine processable information, and
automated processing by software agents [rdf11-concepts
<https://www.w3.org/TR/ldp/#bib-rdf11-concepts>]. LDP-NRs are almost
anything on the Web today: images, HTML pages, word processing documents,
spreadsheets, etc. and LDP-RSs hold metadata associated with LDP-NRs in
some cases."  - https://www.w3.org/TR/ldp/

"

Note: A LDP server can host a mixture of LDP-RSs and LDP-NRs
<https://www.w3.org/TR/ldp/#ldpr-gen-binary>, and therefore there is no
implication that LDP support advertised on one HTTP Request-URI means that
other resources on the same server are also LDPRs. Each HTTP Request-URI
needs to be individually inspected, in the absence of outside information."
- https://www.w3.org/TR/ldp/
Apache HBase in General: https://en.wikipedia.org/wiki/Apache_HBase
(Keywords: HBase, Hadoop, HDFS)

-Brent Shambaugh

GitHub: https://github.com/bshambaugh
Website: http://bshambaugh.org/
LinkedIN: https://www.linkedin.com/in/brent-shambaugh-9b91259
Skype: brent.shambaugh
Twitter: https://twitter.com/Brent_Shambaugh

On Thu, Mar 9, 2017 at 11:42 AM, Sergio Fernández <wikier@apache.org> wrote:

> Brent,
>
> that would be to use the HBase experimental triple store, but has nothing
> to do with HDFS.
>
> In the Marmotta LDP implementation you can use any of the available triple
> stores for storing LDP-RSs, but that's not necessarily bound to the
> implementation used for storing LDP-NRs. In that schema, by default
> Marmotta uses H2/Postgres and local file system respectively.
>
> Hope this helps to understand the difference.
>
> Cheers,
>
> On Thu, Mar 9, 2017 at 6:28 PM, Brent Shambaugh <brent.shambaugh@gmail.com
> > wrote:
>
>> If it helps, running Marmotta 3.3.0 from the installer is pretty easy.
>> Also, I might have 3.4.0 compiled from source somewhere. At least
>> * I recall a different splash screen and it exists in /tmp.*
>> ./tmp/{mamotta-path}/loader
>>
>> marmotta-loader-berkeley  marmotta-loader-hbase  marmotta-loader-ostrich
>> pom.xml
>> marmotta-loader-core      marmotta-loader-kiwi   marmotta-loader-titan
>> target
>>
>> -Brent Shambaugh
>>
>> GitHub: https://github.com/bshambaugh
>> Website: http://bshambaugh.org/
>> LinkedIN: https://www.linkedin.com/in/brent-shambaugh-9b91259
>> Skype: brent.shambaugh
>> Twitter: https://twitter.com/Brent_Shambaugh
>>
>> On Thu, Mar 9, 2017 at 10:56 AM, Sergio Fernández <wikier@apache.org>
>> wrote:
>>
>>> Great!
>>>
>>> Jürgen, if you come out with a good-enough new implementation
>>> of LdpBinaryStoreService on HDFS, please submit a Pull Request to the
>>> project ;-)
>>>
>>> On Thu, Mar 9, 2017 at 5:42 PM, Jürgen Jakobitsch <
>>> juergen.jakobitsch@semantic-web.com> wrote:
>>>
>>>> thank y'all for your input. i think i gonna have a try with marmotta
>>>> then.. ;-)
>>>>
>>>> krj
>>>>
>>>> *Jürgen Jakobitsch*
>>>> Innovation Director
>>>> Semantic Web Company GmbH
>>>> EU: +43-1-4021235-0
>>>> Mobile: +43-676-6212710 <+43%20676%206212710>
>>>> http://www.semantic-web.at
>>>> http://www.poolparty.biz
>>>>
>>>>
>>>>
>>>> PERSONAL INFORMATION
>>>> | web       : http://www.turnguard.com
>>>> | foaf      : http://www.turnguard.com/turnguard
>>>> | g+        : https://plus.google.com/111233759991616358206/posts
>>>> | skype     : jakobitsch-punkt
>>>> | xmlns:tg  = "http://www.turnguard.com/turnguard#"
>>>> | blockchain : https://onename.com/turnguard
>>>>
>>>> 2017-03-07 16:34 GMT+01:00 Dmitri Zagidulin <dzagidulin@gmail.com>:
>>>>
>>>>> Hi Jürgen,
>>>>>
>>>>> As Melvin mentioned, we have an in-progress branch of
>>>>> node-solid-server intended to serve as a base for pluggable backends, but
>>>>> it is certainly not read yet.
>>>>> Your best bet at the moment would probably be Marmotta.
>>>>>
>>>>> Dmitri
>>>>>
>>>>> On Tue, Mar 7, 2017 at 5:05 AM, Sergio Fernández <wikier@apache.org>
>>>>> wrote:
>>>>>
>>>>>> Apache Marmotta by default uses a simple local disk based
>>>>>> implementation for storing LDP-NRs:
>>>>>>
>>>>>> https://github.com/apache/marmotta/blob/develop/platform/mar
>>>>>> motta-ldp/src/main/java/org/apache/marmotta/platform/ldp/ser
>>>>>> vices/LdpBinaryStoreServiceImpl.java
>>>>>>
>>>>>> But its design allows different implementation, HDFS or whatever else.
>>>>>>
>>>>>>
>>>>>> On Sun, Mar 5, 2017 at 10:31 AM, Jürgen Jakobitsch <
>>>>>> juergen.jakobitsch@semantic-web.com> wrote:
>>>>>>
>>>>>>> hi,
>>>>>>>
>>>>>>> (repost to this group, i didn't get an answer from ldp mailing list)
>>>>>>>
>>>>>>> is there any known ldp implementation with an hdfs backend (didn't
>>>>>>> find anything here [1])?
>>>>>>> alternatively: is there a base implementation which i could extend
>>>>>>> for an hdfs backend?
>>>>>>>
>>>>>>> any pointer greatly appreciated
>>>>>>>
>>>>>>> kr jürgen
>>>>>>>
>>>>>>> [1] https://www.w3.org/wiki/LDP_Implementations
>>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Sergio Fernández
>>>>>> Partner Technology Manager
>>>>>> Redlink GmbH
>>>>>> m: +43 6602747925 <+43%20660%202747925>
>>>>>> e: sergio.fernandez@redlink.co
>>>>>> w: http://redlink.co
>>>>>>
>>>>>
>>>>>
>>>>
>>>
>>>
>>> --
>>> Sergio Fernández
>>> Partner Technology Manager
>>> Redlink GmbH
>>> m: +43 6602747925 <+43%20660%202747925>
>>> e: sergio.fernandez@redlink.co
>>> w: http://redlink.co
>>>
>>
>>
>
>
> --
> Sergio Fernández
> Partner Technology Manager
> Redlink GmbH
> m: +43 6602747925 <+43%20660%202747925>
> e: sergio.fernandez@redlink.co
> w: http://redlink.co
>
Received on Thursday, 9 March 2017 18:52:57 UTC

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