On 26/07/17 03:46, Scarlet Remilia wrote:
Hi Andy,
Thank you for your reply, Andy.
In my project, the scale of the data which is existed is about TB-level, and
will extend to PB-level. And data sources will be distributed. According to
what I read from document, TDB is based on memory and file database and on a
single machine. So, I need SAP HANA for my data management and for distributed
data store.
I checked link you referred, and what I concern is whether latest Jena (future
version) will support SDB. If not, data migration will occur big trouble.
While it is deprecated for new usage that is a message to be aware of
the issues with it. Depending on the complexity of access, it may work
for you, it may not. SPARQL BGPs are fine, more complex query patterns
are not.
The Jena project can not promise any future situation. However, it is
open source and so the source is always available (Apache releases are
never removed from the archives unless for legal reasons - i.e. not
because the project wanst to retire something). And they are in
maven-central which is also write-not-delete.
Andy
If there is any better solutions please tell me. Thank you!
Jason
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From: Andy Seaborne<mailto:[email protected]>
Sent: 2017年7月26日 4:47
To: [email protected]<mailto:[email protected]>
Subject: Re: About SAP HANA Database combine TDB
Hi Jason,
I don't know of an RDF store for SAP HANA except
https://blogs.sap.com/2014/10/09/w3c-semantic-web-standards-with-hana-rdfsparql-support/
This might provide some contact points:
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.397.9651&rep=rep1&type=pdf
Jena has an SQL-back store - jena-sdb - through it has limited scale and
theer is currently no HANA configuration (Jena SDB only uses plain SQL
92 so it is not that difficult to add one).
What scale of data stored in HANA sol you want to work with?
Andy
On 25/07/17 07:47, Scarlet Remilia wrote:
Hello,
I’m going to use Jena as framework for RDF, OWL and related
operation, especially for model reasoning. Meanwhile, I paid a attention to SAP
HANA solution for data store.
As documentation mentioned, Jena prefers TDB as persistent triple
store method for high performance. However, in my project, for big data store
and for data high availability and so on, SAP HANA is needed.
Is it available that using SAP HANA as backed RDF database and
using TDB as relationship store? In other words, can TDB can import RDF from
SAP HANA database? OR can TDB store imported RDF into SAP HANA database?
Thank you! Waiting for good news!
Jason
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