Re: [Neo4j] REST API: output respresentation and performance
Oleg,
for an example of this, see
http://docs.neo4j.org/chunked/snapshot/gremlin-plugin.html#rest-api-send-a-gremlin-script---json-encoded-with-table-resultswhere
the returned table does not contain nodes or relationships, but only
properties, this resulting in _MUCH_ smaller return values, doing most of
the work on the server.
Is that what you are looking for?
Cheers,
/peter neubauer
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On Mon, Aug 29, 2011 at 8:12 PM, Marko Rodriguez wrote:
> Hi,
>
> > - Data transfer bottleneck. Returning a large set of nodes/relationships
> > from a Gremlin query with Json might result in excesive result size. We
> > transfer from hundreds to 100.000 entities. In our case, we only need to
> > obtain a single property value (or just a few properties) for each
> > node/relationship. Is it possible to control/limit data in exported node
> > representation? We guess this would solve the problem.
>
> Why return nodes/relationships if you only want a single property:
>
>g.v(1).out.in.myProperty
>
> > - Server-side calculations. We find Gremlin very useful to perform simple
> > calculations on server side. However, we were not able to return Map
> result
> > generated by Gremlin's groupCount () call on entity property. The script
> > traverses multiple relationships and builds { propertyName, counter }
> > histogram. This works fine in Gremlin console, but how to export this
> result
> > back via REST API. We tried tables, but this option seems to be limited
> only
> > to nodes/relationships. Any options?
>
> I don't know enough about the REST API and Gremlin, but have you tried:
>
> m = [:]
> g.v(1).my.groupCount(m).based.traversal >> -1
> m
>
> where you need the 'm' at the end to return the map.
>
> Or are you saying that m can't be converted correctly to something Neo4j
> managed extensions can understand and JSONify for you?
>
> See ya,
> Marko.
>
> http://markorodriguez.com
>
>
> >
> > Thanks for help in advance!
> >
> > Best regards,
> > Oleg Morajko
> > innoquant.com
> >
> >
> > --
> > View this message in context:
> http://neo4j-community-discussions.438527.n3.nabble.com/REST-API-output-respresentation-and-performance-tp3293338p3293338.html
> > Sent from the Neo4j Community Discussions mailing list archive at
> Nabble.com.
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Re: [Neo4j] REST API: output respresentation and performance
Hi,
> - Data transfer bottleneck. Returning a large set of nodes/relationships
> from a Gremlin query with Json might result in excesive result size. We
> transfer from hundreds to 100.000 entities. In our case, we only need to
> obtain a single property value (or just a few properties) for each
> node/relationship. Is it possible to control/limit data in exported node
> representation? We guess this would solve the problem.
Why return nodes/relationships if you only want a single property:
g.v(1).out.in.myProperty
> - Server-side calculations. We find Gremlin very useful to perform simple
> calculations on server side. However, we were not able to return Map result
> generated by Gremlin's groupCount () call on entity property. The script
> traverses multiple relationships and builds { propertyName, counter }
> histogram. This works fine in Gremlin console, but how to export this result
> back via REST API. We tried tables, but this option seems to be limited only
> to nodes/relationships. Any options?
I don't know enough about the REST API and Gremlin, but have you tried:
m = [:]
g.v(1).my.groupCount(m).based.traversal >> -1
m
where you need the 'm' at the end to return the map.
Or are you saying that m can't be converted correctly to something Neo4j
managed extensions can understand and JSONify for you?
See ya,
Marko.
http://markorodriguez.com
>
> Thanks for help in advance!
>
> Best regards,
> Oleg Morajko
> innoquant.com
>
>
> --
> View this message in context:
> http://neo4j-community-discussions.438527.n3.nabble.com/REST-API-output-respresentation-and-performance-tp3293338p3293338.html
> Sent from the Neo4j Community Discussions mailing list archive at Nabble.com.
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> Neo4j mailing list
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[Neo4j] REST API: output respresentation and performance
Hi guys,
We are developing an analytics server on top of Neo4j REST API. We use Neo4j
1.4.1.
Our general experience is good, you are doing a great job!
In our project we make a number of Gremlin/Cypher queries and some traversal
calls via REST API.
However, we have experienced some data transfer performance bottlenecks and
funcional limitations when obtaining the results back from the Neo4j server.
The issues we experience are the following:
- Data transfer bottleneck. Returning a large set of nodes/relationships
from a Gremlin query with Json might result in excesive result size. We
transfer from hundreds to 100.000 entities. In our case, we only need to
obtain a single property value (or just a few properties) for each
node/relationship. Is it possible to control/limit data in exported node
representation? We guess this would solve the problem.
- Server-side calculations. We find Gremlin very useful to perform simple
calculations on server side. However, we were not able to return Map result
generated by Gremlin's groupCount () call on entity property. The script
traverses multiple relationships and builds { propertyName, counter }
histogram. This works fine in Gremlin console, but how to export this result
back via REST API. We tried tables, but this option seems to be limited only
to nodes/relationships. Any options?
Thanks for help in advance!
Best regards,
Oleg Morajko
innoquant.com
--
View this message in context:
http://neo4j-community-discussions.438527.n3.nabble.com/REST-API-output-respresentation-and-performance-tp3293338p3293338.html
Sent from the Neo4j Community Discussions mailing list archive at Nabble.com.
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