save and restore database state

[Jens Weber]

Is there a way to save and restore neo4j graph database states (other than by using transactions)? Of course, I know that there is a backup mechanism, but I am looking for something faster, something that can be used programmatically. 

Flat nested transactions (as provided by neo4j) do not help in my use case. I am trying to implement a kind of "undo" mechanism that should be able to undo several transactions (not only one).

Thanks for any advice.

Jens

[Michael Hunger]

What's your use-case?

Michael

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[Jens Weber]

I have been developing a rule-based graph transformation engine on top of Neo4J (Grape). 

Think of it as a declarative, rule-based language for defining and executing sub-graph replacements. 

With the rule-based engine you can define and solve certain "search" problems, based on a "forward-chaining" of graph replacement rules. Backtracking is needed for this mechanism. The backtracking mechanism needs  the ability to "reset" the graph database state to previous states. I currently have a version of it implemented that uses neo4j flat (nested) transactions, but it is slow, since every backtracking point resets the entire database to its original graph and then "redos" all transformations up to the point where the backtracking happened. It would be much faster to use some "save and restore" mechanism - if that was available in Neo4J at all.

Here is the link to the open source project. https://github.com/jenshweber/grape

Thanks

Jens