Re: [Neo4j] save and restore database state

[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


On Tuesday, May 17, 2016 at 9:51:43 PM UTC-7, Michael Hunger wrote:
>
> What's your use-case? 
>
> Michael 
>
> > Am 17.05.2016 um 22:37 schrieb 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 
> > 
> > -- 
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Re: [Neo4j] save and restore database state

['Michael Hunger' via Neo4j]

What's your use-case?

Michael

> Am 17.05.2016 um 22:37 schrieb 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
> 
> -- 
> You received this message because you are subscribed to the Google Groups 
> "Neo4j" group.
> To unsubscribe from this group and stop receiving emails from it, send an 
> email to neo4j+unsubscr...@googlegroups.com.
> For more options, visit https://groups.google.com/d/optout.

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