There are snapshot/preview builds of TDB2 now available.
* TDB2 has scalable transactions
* TDB2 has write-once transactions (no RDF data in the journal)
and generally better written for long term maintenance and stability.
** TDB2 is not compatible with Apache Jena TDB (TDB1) databases. **
This is not part of Apache Jena - it is a personal project and does not
come with the backing of the Apache Software Foundation. (Whether it
will be in the future is for discussion with the PMC.)
This is a preview release - it is subject to change and while "it works
for me", it is likely to have rough edges.
TDB2 from Java:
https://github.com/afs/mantis/blob/master/use-tdb2.md
TDB2 in Fuseki:
https://github.com/afs/mantis/blob/master/use-fuseki-tdb2.md
Codebase:
https://github.com/afs/mantis
Note that the artifacts come from the Sonatype snapshot repo so you need
to configure maven/gradle/... appropriately.
Example:
Loading 100m of BSBM data into a live Fuseki (a single write transaction
while the server was able to answer queries at the same time) with a
default heap size:
SSD: 70K triples/s (about 24 minutes)
Disk: 47.5K TPS (about 35 minutes)
(That said, my SSD is in a desktop machine it's not particularly fast.
Modern servers have a much architecture.)
This would not have been possible without:
* The UK Government - InnovateUK (the Technology Strategy Board as was)
most of the work is a spin off from a grant-funded project
* Epimorphics for letting me work on that project
* GitHub for the code repository
* Sonatype for the maven repository and route to Maven Central
* TravisCI for the continuous integration server.
Andy
