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SemanticComputing / fuseki-docker

Apache Jena Fuseki with SeCo extensions
MIT License
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Newb question on docker state (im)permanence #20

Closed rjalexa closed 1 year ago

rjalexa commented 1 year ago

Dear friends just a docker/fuseki newbie question.

I have this docker working very well with two bind mounts to host directory for the databases and configuration.

Yesterday via the Fuseki web interface I had deleted two datasets, the default DS and a MEMATEST and kept only one single MEMA dataset for my application. All good.

Today I needed to stop the docker and restart it and much to my surprise the two datasets I had deleted are back in the interface.

Can you please help me understand why is this happening?

Just to be sure if I add data from TTLs via the s-post program, and then need to stop and restart, will I lose data?

Thanks for clearing up my confusion.

yoge1 commented 1 year ago

The default dataset "ds" configured in the assembler.ttl file cannot really be deleted via the Fuseki web interface. You can technically do that, but after docker container restart the "ds" dataset appears once again in the interface. Thus, I think you cannot delete any dataset that is configured in the assembler.ttl via the interface – you need to edit assembler.ttl for that (and delete database/index files manually on the filesystem).

Regarding the other dataset "MEMATEST" – how was this created? If via the Fuseki web interface, it should stay deleted once it has been deleted via the interface.

Just to be sure if I add data from TTLs via the s-post program, and then need to stop and restart, will I lose data?

If the data is persisted on the host file system – as it should be as you are using a bind mount for the databases – you shouldn't lose data if you stop/restart the docker container (you can even do docker rm and create a new container to access the data loaded with the previous container).

rjalexa commented 1 year ago

Thank you very much. I appreciate your help!