How to transfer i2p network database to another server?

Question

Database

There is a server on unix with java + i2psvc that has been spinning i2p traffic for 2 years, at maximum bandwidth.
I believe that it has some trust from the network and a good speed in this network, respectively.
But I needed to turn it off, the equipment is being decommissioned = (and it's a pity to lose the developments, for example, the address book, statistics ... I myself did not use this network much, I'm just a volunteer, a volunteer - who could provide a good channel without consequences.
a) What files to save from the i2p application?
b) What is your advice?