May be useful an option to save on disk?

I am aware about the option gremlin.tinkergraph.graphLocation that saves on disk when the server is terminated.

Here I'm asking about the possibility to add something that saves on disk "sometimes".

Something easy like a cron or catching a SIGUSR1/2 that simply triggers the saveGraph() method, that is now a private function in the org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerGraph.java file.

I really don't know if the save can be done in a running server, so please forgive me if this is simply impossible.

But if it could be possible, doesn't make sense to you? 

We may adopt this server at least for a preprod environment if I can avoid the reboot in order to have persistence

Many thanks.