On 19/07/13 14:09, Minto van der Sluis wrote:
Hi Folks,
Next issue I have to tackle on my assignment is Clustering. Basically I
have 2 issues right now:
1) Running my assembly clustered
This seems to be the easy one, since I am using Apache Karaf for
building my assembly/distribution. Karaf has a subproject called Cellar
for clustering. Here just have to dive in a get it done.
2) Having a cluster aware datastore (Jena TDB)
Googling around leaves me clueless. Sometimes it appears TDB can be used
in clustered environments others it appear it can't. I sure couldn't
find any recipe how to get it done. I should probably ask this on the
Jena mailing list, but I am trying this one first since you guys seem to
have quite some experience with TDB.
I am wondering if I can really use TDB in a clustered setup or if need
to switch to another datastore to accomplish this. Probably SDB can be
used for this but I fear a performance penalty.
Any thoughts?
Regards,
Minto
Minto,
Do you want a shared database across the cluster (3 tier architecture
style)? That's what SDB woulD give you.
Fuseki does this for TDB. It can be used as a shared DB server. TDB is
just the database engine.
We/Epimorphics run replicated Fusek's as well but update is not
instantly consistent (we don't need that for our usage).
If the interface in Clerezza were the SPARQL protocol, then choice of
the backend database is a deployment choice.
Is there a SPARQL protocol provider?
Andy
