On 25/08/16 16:16, Laurent Rucquoy wrote:
Hello,
I'm implementing a TDB-backed dataset (Jena 3.1) and I whish to provide a
method to change the StoreParams of this dataset.
> > Because changing the StoreParams implies to release the corresponding
dataset location, I'd like to identify the current StoreParams in use to be
able to avoid to release the location if the StoreParams we want to apply
now are the same as those currently used.
Release is not so bad unless you are doing it frequently.
What is the right way to do this (if possible) ?
This may work:
DatasetGraphTDB x = TDBInternal.getBaseDatasetGraphTDB(myDatasetGraph)
StoreParams sp = x.getConfig().params ;
System.out.println(sp);
(the "may" is because I only think it works on a live dataset no tested it)
Obviously the name "TDBInternal" is a warning!
Which params are you interested in changing?
Andy
Defaults:
fileMode dft:mapped
blockSize dft:8192
readCacheSize dft:10000
writeCacheSize dft:2000
Node2NodeIdCacheSize dft:100000
NodeId2NodeCacheSize dft:500000
NodeMissCacheSize dft:100
indexNode2Id dft:node2id
indexId2Node dft:nodes
primaryIndexTriples dft:SPO
tripleIndexes dft:[SPO, POS, OSP]
primaryIndexQuads dft:GSPO
quadIndexes dft:[GSPO, GPOS, GOSP, POSG, OSPG, SPOG]
primaryIndexPrefix dft:GPU
prefixIndexes dft:[GPU]
indexPrefix dft:prefixIdx
prefixNode2Id dft:prefix2id
prefixId2Node dft:prefixes
Thank you in advance for your help.
Sincerely,
Laurent
