Thank you, Andy. I will do more work on this issue. Jason
Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10 From: Andy Seaborne<mailto:[email protected]> Sent: Thursday, July 27, 2017 04:04 To: [email protected]<mailto:[email protected]> Subject: Re: About SAP HANA Database combine TDB 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 > > Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10 > > 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 >> >> Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10 >> >> > >
