What is the correct file location to write a lucene index to in the cloud?

I tried the tmp directory. It seems to write, (I got no errors), but after indexing no files can be found. Edit 1: Maybe the tmp folder is cleaned up automatically?
1 answers

Odd. We've done something similar with a self-written index file (for radix tree search). We used the temp space as well, without issue.

We never did use it in the cloud (only local and on an on-premise Pivotal CF), but I see no reason why it shouldn't work in the Mendix cloud as well...

I take it your local tests are all fine?