Niels/Mattias: we are also exploring a Solr implementation for the index framework. There are some potential benefits using Solr in a large graph/HA/distributed scenario that we are investigating. The tough part is the distributed transactioning, though.
----- Reply message ----- From: "Mattias Persson" <[email protected]> Date: Mon, May 9, 2011 6:14 am Subject: [Neo4j] Timeline index To: "Neo4j user discussions" <[email protected]> 2011/4/12 Niels Hoogeveen <[email protected]> > > Hi Mattias, > Thank you for your response. I am currently working with the version you > pointed out. My bigger concern is the possible deprecation of this component > in future releases. > As I pointed out, there are use cases where the Lucene timeline is not an > appropriate choice, but the graph-based B-tree Timeline is. For example, > versioning of nodes in the database requires an index per node (except for > the version nodes of course), also when using a quad-store with an index on > recent-entries per context, a timeline index per context is necessary. These > type of scenarios can potentially create millions of indices, which can > easily be stored in Neo4J, but are impossible! to store in the Lucene index > component. > So my issue is not so much how to use the graph-based B-tree Timeline index > in version 1.3, but having similar functionality in future releases. > BTW... love the work you have done on the Lucene component, which is much > more flexible and usable than previous incarnations. > Kind regards,Niels Hoogeveen > Allright, I can see the problem with lucene indexes in such a case :) I think the "legacy index" will live on as it is for at least a while. It may not be valid with @Deprecated since it's now it's own component, having the word "legacy" in it. Cool, right it opens up the lucene functionality a bit more then the previous incarnation of the index framework. > > > Date: Tue, 12 Apr 2011 22:37:42 +0200 > > From: [email protected] > > To: [email protected] > > Subject: Re: [Neo4j] Timeline index > > > > Hi Niels, > > > > I think you're right about the lucene-based timeline not being right > > for millions of indices, not possible even! The old index component > > isn't a part of the official release, but is supported and available > > as neo4j-legacy-index from neo4j maven repository, > > http://m2.neo4j.org/org/neo4j/neo4j-legacy-index/ and will have a > > version synchronized with the org.neo4j:neo4j artifact. Source is > > here: https://github.com/neo4j/legacy-index > > > > 2011/4/12 Niels Hoogeveen <[email protected]>: > > > > > > I appreciate the new indexing framework available, and noticed the > addition of a Timeline based on Lucene. I was wondering if this is seen as a > replacement of the original graph-based B-tree Timeline. > > > If that is the case, I will have serious problems with the software I > am developing, and which uses the B-tree based Timeline in several places > where Lucene Timeline wouldn't work. > > > I have many (potentially millions) timeline indexes in my application > to maintain sort orders. Almost every node in the graph is actually the root > of one or more Timeline indexes. This works well when the index is graph > based, but I fear it wouldn't work when using Lucene. I don't think > maintaining millions of indexes is something Lucene is particularly suited > for. > > > I didn't see neo4j-index being part of the 1.3-M5 release, so I'd like > to check-up to see if this component remains to be supported. > > > Kind regards,Niels Hoogeveen > > > > > > _______________________________________________ > > > Neo4j mailing list > > > [email protected] > > > https://lists.neo4j.org/mailman/listinfo/user > > > > > > > > > > > -- > > Mattias Persson, [[email protected]] > > Hacker, Neo Technology > > www.neotechnology.com<http://www.neotechnology.com> > > _______________________________________________ > > Neo4j mailing list > > [email protected] > > https://lists.neo4j.org/mailman/listinfo/user > > _______________________________________________ > Neo4j mailing list > [email protected] > https://lists.neo4j.org/mailman/listinfo/user > -- Mattias Persson, [[email protected]] Hacker, Neo Technology www.neotechnology.com<http://www.neotechnology.com> _______________________________________________ Neo4j mailing list [email protected] https://lists.neo4j.org/mailman/listinfo/user _______________________________________________ Neo4j mailing list [email protected] https://lists.neo4j.org/mailman/listinfo/user
