On Mon, Sep 4, 2017 at 12:10 PM, <[email protected]> wrote:
Little of both? :grin:
Primarily I am interested because of a grant [1] in which the Smithsonian
Institution (where I work) is participating in a supporting role (partly
because I convinced us to). That work involves using Cassandra for
distributed storage, and it will also involve a distributed LDP
implementation (the Fedora API referred to in that grant description is
really just a packaging of Memento [2] with LDP [3]), hence my interest in
jena-on-cassandra.
Turning this round - what are the requirements for the distributed storage?
As I understand the join question, the usual move with Cassandra is to
denormalize and store the joined data together, but that's obviously
nontrivial in our situation, where we don't know the potential queries.
Have you looked at an indexing solution such as was used by CumulusRDF [4]?
(single graph example)
If Cassandra has stored PSO and POS then parallel merge joins are possible.
Andy
ajs6f
[1] https://www.imls.gov/grants/awarded/lg-71-17-0159-17
[2] http://www.mementoweb.org/guide/quick-intro/
[3] https://www.w3.org/TR/ldp/
[4] http://iswc2011.semanticweb.org/fileadmin/iswc/Papers/Worksh
ops/SSWS/Ladwig-et-all-SSWS2011.pdf
Claude Warren wrote on 9/2/17 12:44 PM:
are you looking to use jena-on-cassandra or do you have ideas? what leads
you to ask about it?
On Sat, Sep 2, 2017 at 1:21 PM, <[email protected]> wrote:
Hey, Claude--
Just curious as to where https://github.com/Claudenw/jena-on-cassandra
has ended up. Is that still work-in-progress?
--
ajs6f
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