Include multiple search indices from Grasshopper?

[hwanders]

Hello,
I'm considering to use Photon for my project.

In some comments on Github I've found that for the full world-wide index it's recommended to have approx. 128 GB RAM available.
I will test it with the available hardware but just in case the response-times are not acceptable, I would like to try to reduce that dataset to the countries relevant to my use-case.

Can I run Photon with multiple indices (or combine them somehow) from https://download1.graphhopper.com/public/extracts/by-country-code/?

For example I would like to run it with data for de, dk, pl, cz, at, ch, fr, lu, be, nl.

[lonvia]

No, it is not possible to merge the indices. At least not without doing some low-level hacks with ElasticSearch.

Doing multi-country databases will become easier with the recently merged #885 but providing dumps instead of database extracts is still some months away.